Fluoroplastic self-priming pumps, also known as the TIZF series fluoroplastic self-priming pumps, are designed and manufactured in accordance with international standards and the manufacturing processes for non-metallic pumps. The pump structure adopts a self-priming design. The pump casing consists of a metal shell lined with fluoroplastic, and all wetted parts are made of fluoroplastic alloy. Components like the pump cover and impeller are manufactured by integrally sintering and pressing metal inserts coated with fluoroplastic. The shaft seal utilizes an advanced external bellows mechanical seal. The stationary ring is made of 99.9% alumina ceramic (or silicon nitride), and the rotating ring is made of PTFE-filled material, ensuring highly stable corrosion resistance, wear resistance, and sealing performance.

A fluoroplastic self-priming pump does not require priming before startup (although the initial installation still requires priming). After a short period of operation, the pump can draw fluid up and commence normal operation through its own action.

Fluoroplastic self-priming pumps can be classified by their operating principle into the following categories:

1.Gas-liquid mixing type (including internal mixing and external mixing).

2.Water ring type.

3.Jet type (including liquid jet and gas jet).

Working process of the gas-liquid mixing self-priming pump: Due to the special structure of the pump casing, a certain amount of water remains in the pump after it stops. When the pump is started again, the rotation of the impeller fully mixes the air in the suction line with the water. This mixture is discharged into the gas-water separation chamber. The gas in the upper part of the separation chamber escapes, while the water in the lower part returns to the impeller to mix again with the remaining air in the suction line. This process continues until all gas in the pump and suction line is expelled, completing the self-priming process and allowing normal pumping.

Water ring self-priming pumps​ integrate a water ring and the pump impeller within a single housing, using the water ring to expel gas and achieve self-priming. Once the pump operates normally, the passage between the water ring and the impeller can be closed off via a valve, and the liquid within the water ring can be drained.

Jet self-priming pumps: consist of a centrifugal pump combined with a jet pump (or ejector). They rely on the ejector device to create a vacuum at the nozzle to achieve suction.

The self-priming height of a fluoroplastic self-priming pump is related to factors such as the front impeller seal clearance, pump speed, and liquid level height in the separation chamber. A smaller front impeller seal clearance results in a greater self-priming height, typically set between 0.3-0.5 mm. If the clearance increases, besides a decrease in self-priming height, the pump's head and efficiency also reduce. The self-priming height increases with the rise in the impeller's peripheral velocity (u2). However, once the maximum self-priming height is reached, further speed increases will not raise the height but only shorten the priming time. If the speed decreases, the self-priming height also decreases. Under other constant conditions, the self-priming height increases with a higher stored water level (but should not exceed the optimal water level for the separation chamber).

To better facilitate gas-liquid mixing within the self-priming pump, the impeller should have fewer blades, increasing the pitch of the blade grid. It is also advisable to use a semi-open impeller (or an impeller with wider flow channels), as this allows the returning water to penetrate more deeply into the impeller blade grid.

Most fluoroplastic self-priming pumps are matched with internal combustion engines and mounted on movable carts, making them suitable for field operations.

What is the working principle of a fluoroplastic self-priming pump?

For a standard centrifugal pump, if the suction liquid level is below the impeller, it must be primed with water before startup, which is inconvenient. To retain water in the pump, a foot valve is required at the inlet of the suction pipe, but this valve causes significant hydraulic losses during operation.

A self-priming pump, as described above, does not require priming before startup (except for the initial installation). After a short operation, it can draw fluid up and begin normal operation. The classification and working principles of the different self-priming types (gas-liquid mixing, water ring, jet) are as previously detailed.

For engineers, system integrators, and OEMs in the HVAC, heat pump, and boiler sectors, choosing the right circulation pump is critical for system efficiency, reliability, and comfort. Shinhoo Basic 50-12SF Ultra pumps are designed specifically for heating and hot water circulation systems, providing optimal performance for modern residential and commercial installations.

Optimized Performance for Every Condition

Shinhoo pumps are engineered with hydraulic and motor optimization, achieving up to 40% overall efficiency. This means your system operates cost-effectively without compromising performance. With 1000W power and a noise index of ≤43dB(A), these pumps deliver whisper-quiet operation, ensuring comfort in any living or working environment.

Adaptable Operation: One Pump, Multiple Modes

Modern systems require flexibility. Shinhoo circulation pumps are designed with three-speed modes (Ⅰ, Ⅱ, Ⅲ):

lContinuous Comfort – Keep your system stable with uninterrupted operation.

lMulti-Condition Adaptation – One pump adapts to seasonal changes, time schedules, and different operational modes without the need for replacement.

lEasy Commissioning – Select the ideal flow and pressure simply by choosing the right mode.

lBackup Mode Protection – If the high-speed mode fails, the mid-speed mode keeps your system running, avoiding complete downtime.

With these features, your system remains stable, efficient, and reliable, season after season.

Durability You Can Trust

Shinhoo pumps are built to last. Every unit undergoes 2000+ hours of durability testing and is designed for a 10-year lifespan, giving you peace of mind and long-term reliability.

Why Shinhoo Pumps Stand Out

• Quiet Operation – ≤43dB(A) for near-silent performance
• Flexible Speed Control – Adapts to different system requirements
• High Efficiency – Reduces energy costs and improves system performance
• Long Lifespan – Tested for 2000+ hours, designed for 10 years

Whether you’re upgrading an existing system or installing a new one, Shinhoo Basic 50-12SF Ultra pumps deliver the perfect combination of efficiency, adaptability, and durability.

In today’s fast-evolving HVAC and water supply market, efficiency, reliability, and smart control are more important than ever. Shinhoo’s Mega S Pro Series circulation pumps are designed to meet these demands, offering advanced technology, long-lasting durability, and versatile applications for both residential and commercial systems.

Advanced Control and Protection Functions

Mega S Pro Series offers 12 control modes and 15 protection functions, giving operators maximum flexibility and safety. Users can choose from Temperature Control, ΔT Control, 0–10V, 4–20mA, PWM, and Communication Control modes depending on their system requirements. These intelligent features ensure optimal performance while protecting the pump and connected systems from potential damage.

Quiet Operation and Long-Term Reliability

Noise can be a critical factor in residential and commercial environments. Mega S Pro Series operates at an ultra-low Noise Index ≤45 dB(A), with Mega S 25-12 Pro model reaching ≤39 dB(A). Coupled with a specially coated shaft and robust engineering, these pumps provide reliable performance for over 10 years, making them a long-term investment in system efficiency and user comfort.

Versatile Applications

• Shinhoo Mega S Pro pumps are suitable for a wide range of applications:
• Heating & Cooling Systems: Perfect for both hot water and cold water circulation.
• Air-Conditioning Systems: Ensures consistent flow for residential and commercial setups.
• Residential & Commercial Water Supply: Reliable pressure and flow for everyday use.
• R290 (Propane) Refrigerant Systems: Compatible with eco-friendly refrigerants for sustainable solutions.

Whether used in new installations or system upgrades, these pumps are engineered to deliver optimal performance while minimizing energy consumption and operational noise.

User-Friendly Interface

TFT LCD Display allows intuitive setup and monitoring, making installation and maintenance straightforward. Users can quickly access real-time data, adjust control modes, and ensure the pump operates at peak efficiency without requiring extensive technical expertise.

Shinhoo Mega S Pro Series is more than just a circulation pump — it’s a smart, quiet, and durable solution built for modern HVAC and water systems. By combining advanced control features, ultra-quiet operation, and robust engineering, these pumps help optimize system efficiency, reduce maintenance costs, and enhance user comfort.

Shinhoo continues to innovate, providing reliable, energy-efficient, and intelligent solutions for the next generation of heating, cooling, and water supply systems.

In today’s fast-evolving energy landscape, maintaining stable and efficient thermal management is critical — whether for residential buildings, commercial projects, or large-scale centralized energy storage systems. Shinhoo Horizontal Multistage Wet Rotor Pumps are engineered to meet these demands, ensuring reliable performance across diverse applications.

Compact Design, Powerful Performance

Despite their small footprint, Shinhoo pumps deliver exceptional efficiency and stability. Shinhoo horizontal multistage wet rotor design allows for high flow rates and consistent pressure, making them ideal for a wide range of heating, cooling, and energy storage systems.

Versatile Applications

Residential & Commercial HVAC: Keep hot water circulation and heating/cooling systems running smoothly.

Data Center Cooling: Manage critical thermal loads to ensure uninterrupted operation of servers and equipment.

Energy Storage Modules: Support stable thermal conditions in batteries and other energy storage solutions, improving lifespan and performance.

Sustainable and Reliable

At Shinhoo, we prioritize not just performance but also sustainability. Our pumps provide stable, efficient energy flow while minimizing energy consumption, helping clients achieve greener operations without compromising reliability.

Why Choose Shinhoo

• Compact, space-saving design
• High efficiency and stable operation
• Wide compatibility across residential, commercial, and industrial applications
• Supports sustainable energy management initiatives
• 

Whether it’s for everyday comfort, industrial efficiency, or large-scale energy solutions, Shinhoo pumps deliver small size, strong performance, and sustainable energy flow.

Shinhoo EPS25-40NC is a horizontal multistage wet rotor pump engineered for high efficiency, quiet operation, and long-term reliability. Designed for modern HVAC, energy storage, and industrial systems, it delivers consistent performance across a wide range of applications, from residential hot water circulation to complex industrial cooling and data center systems.

Efficient & Steady Operation — Optimized 3D impeller and 304 stainless steel hydraulics ensure high efficiency and a maximum head of 40 meters, providing stable flow for diverse applications.

Wet Rotor Design — Maintenance-free and leak-proof, eliminating common issues associated with mechanical seals.

Quiet Operation — Water-cooled design reduces noise by 25%, creating a peaceful environment for residential and commercial settings.

Compact Design — 20% smaller footprint allows for easier installation, even in tight spaces.

Durable & Corrosion-Resistant — IP56 protection ensures long-term reliability in harsh environments.

Wide Temperature Range — Operates in ambient temperatures from -40°C to 70°C and medium temperatures from -40°C to 95°C, supporting 55% ethylene glycol solutions.

Flexible Installation — Supports chuck and threaded interfaces for seamless integration into various systems.

Shinhoo EPS25-40NC is built to handle a variety of circulation and cooling requirements:

1. Charging station cooling systems
2. Energy storage systems
3. Domestic water supply systems
4. Hot water circulation and HVAC systems
5. Industrial circulation systems
6. Cleaning and garden irrigation systems
7. Data center cooling systems

Whether you are maintaining residential comfort, managing industrial operations, or ensuring critical system stability in data centers, EPS25-40NC provides reliable, quiet, and efficient performance.

With over 2000 hours of rigorous testing and a 10-year design lifespan, EPS25-40NC offers long-term durability and operational peace of mind. Its combination of advanced hydraulics, quiet operation, and flexible installation makes it an ideal choice for professionals looking to enhance system efficiency while minimizing maintenance and operational costs.

Upgrade your system with Shinhoo EPS 25-40 NC and experience consistent, high-performance circulation for every application.

Fabric Ici Mace Snag Testing is an important method for assessing the snag resistance of knitted fabrics and some woven fabrics. It is widely used in quality control, product development, and standard compliance testing in the textile industry. The following is an introduction to its working principle, structural components, technical parameters, operating methods, maintenance, and other aspects:

1. Core standards:

GB/T 11047-2008 ‘Textiles — Evaluation of fabric snagging properties — Hammer test method’

ISO 13935-1:2019 ‘Textiles — Determination of fabric snagging properties — Part 1: Hammer test method’

ASTM D3939 (American Society for Testing and Materials standard), etc.

2. Applicable fabrics

Mainly applicable to knitted fabrics (such as underwear, sweaters, sportswear fabrics, etc.), it can also be used for some woven fabrics that are prone to snagging (such as lightweight synthetic fabrics). The focus is on evaluating the fabric's resistance to friction and snagging during daily use, which can cause fibres to be pulled out and form loops or pilling.

3.Working Principle: A package of beads with a known weight is placed into the knitted fabric sample, which is then inserted into a test drum equipped with needle rods. The test drum rotates at a specified speed, causing the knitted fabric and bead pillows to tumble and friction within the drum, simulating the snagging conditions the fabric may encounter during actual use. After a predetermined number of revolutions, the test is stopped, the sample is removed, and the fabric's snagging grade is evaluated according to relevant standards.

4. Structural Components  

Drive system: motor and transmission device to control the rotation of the specimen cylinder.

Sample cylinder: Smooth-surfaced, removable cylindrical cylinder for wrapping and fixing the fabric sample to be tested. The standard diameter is usually 92±1mm.

Bead Pillow (Staple Hammer/Puncture Roller): The core component. Usually a cylinder with stainless steel pins or nails of a specific specification (e.g. diameter, length, number, arrangement) regularly set on the surface. Its weight is an important parameter for testing (e.g. 2.5kg is a common standard requirement). Some instruments may be equipped with bead pillows of different sizes.

Weights (optional): used to accurately regulate the total pressure applied to the bead cushion (weight of the cushion + additional weights).

Counter: Records the number of revolutions (RPM) of the specimen cylinder.

Protective cover: prevents the bead cushion from accidentally flying or spilling of sample fragments during the test for safety.

Base and Frame: Supports the entire structure of the instrument.

5. Technical Specifications  

Test Speed: Typically 20±3 rpm.  

Power Supply Voltage: AC 220V ±10%, power approximately 60W.  

Dimensions: Vary by model, e.g., 470×420×390 mm or 47×38×38 cm, etc.

6. Operating Procedures  

Preparation: Select appropriate knitted fabric samples, ensure the sample dimensions meet requirements, and prepare bead pillows of qualified weight. Connect the power supply and check if the instrument is operating normally.  

Sample Installation: Place the bead pillow into the knitted fabric sample, then secure the sample with the bead pillow in the sample clamp, and insert the sample clamp into the test drum.

Parameter Settings: Set the test drum's rotation speed, RPM, and other parameters according to the test standards and requirements.  

Start Test: Activate the instrument, and the test drum begins rotating. The knitted fabric and bead pillow roll and friction within the drum to conduct the pilling test.  

Test Completion: When the counter displays the predetermined rotation count, the instrument automatically stops. Remove the sample and evaluate its pilling grade according to relevant standards.

7. Maintenance and Care  

Regular Cleaning: Regularly clean the test drum, needle rod, and fabric debris, dust, and other contaminants from the needles to maintain the cleanliness of the instrument’s interior and prevent interference with test results.  

Inspect Components: Regularly inspect components such as the needle rod, needles, and sample clamps for damage, deformation, or loosening. If any issues are found, promptly replace or repair them to ensure the instrument operates normally.

Instrument Calibration: Calibrate the instrument regularly in accordance with the manufacturer's recommendations and relevant standards to ensure the accuracy and reliability of test results.

Proper Storage: When not in use, store the instrument in a dry, well-ventilated environment to prevent moisture, rust, or other damage.

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Direct: + 86 152 6060 5085

Tel: +86-596-7686689

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Salt spray test, as an important means of assessing the salt spray corrosion resistance of products or metal materials, the determination of the test results is not only directly related to the judgment of product quality, but also affects the subsequent research and development and production decisions. Salt spray test results determination of the four main methods: rating determination method, weighing determination method, corrosive material appearance determination method and corrosion data statistical analysis method.

1. Rating and judgment method

Rating judgment method, is the corrosion area and the total area of the sample ratio of the percentage in accordance with certain standards into a number of grades, to a particular grade as a qualified or unqualified basis for judgment. This method is particularly suitable for the evaluation of flat samples, because it can visually reflect the degree of corrosion of the sample surface.

2.Weighing judgment method

Weighing judgment method is through the measurement of corrosion test before and after the change in the quality of the sample, calculate the weight of the corrosion loss (or weight gain), in order to judge the corrosion resistance of the sample quality. This method is particularly suitable for accurate assessment of the corrosion resistance of metal materials.

3.The appearance of corrosive material judgment method

Corrosive appearance determination method is a qualitative determination method, which is based on the salt spray corrosion test whether the product produces visible corrosion phenomenon to judge the corrosion resistance of the sample. This method is simple and intuitive, easy to operate, so it is widely used in many product standards.

4. Corrosion data statistical analysis

Statistical analysis of corrosion data is a more complex and comprehensive determination method, which combines the test design, data collection, statistical analysis and other aspects of the design of corrosion tests, analysis of corrosion data, corrosion data to determine the confidence level of the scientific method.

5. Comprehensive application

In practical application, these four determination methods often do not exist in isolation, but according to specific needs and test conditions for flexible selection and combination. For example, in the evaluation of the corrosion resistance of flat plate samples, you can prioritize the use of rating determination method and weighing determination method; and in the assessment of complex shapes or surface treatment of uneven samples, can be combined with the emergence of corrosive material determination method and statistical analysis of corrosion data for a comprehensive judgment.

Email: hello@utstesters.com

Direct: + 86 152 6060 5085

Tel: +86-596-7686689

Web: www.utstesters.com

In the evolving world of cooling technology, H.Stars has made a breakthrough in precision temperature control. Our newly launched chiller units maintain temperature stability within an astonishing ±0.05℃, setting a new benchmark for industries where even minor deviations can impact quality and performance.

Why Precision Matters

Advanced Hardware for Superior Performance

Intelligent Control System: The Brain of the Chiller

Practical Impact for Industry

What is the difference between self-priming pump and non-clog submerged sewage pump?

non-clog submerged sewage pump are engineered to operate below the liquid medium, enabling low-level transportation. Their structural design features a long-shaft cantilever configuration. The submersion depth must be strictly limited to 2 meters, as exceeding this threshold causes a significant drop in efficiency. However, the primary challenge lies in the flexible shaft's design. During operation, the bearings endure continuous one-sided wear, which leads to bearing vibration and further exacerbates the wear cycle, resulting in persistently high failure rates. Moreover, the wear-prone components are predominantly located below the liquid medium, making disassembly and maintenance extremely difficult.

The development of self-priming pumps represents a revolutionary advancement over traditional pumping systems. Firstly, these pumps eliminate the long shafts and troublesome bearings found in non-clog submerged sewage pump. Secondly, their key components remain above ground level, with no mechanical parts submerged in the medium being transported. This design enables faster and easier maintenance and repairs. Furthermore, they achieve a significant lift height improvement, with maximum suction reaching approximately 7 meters (higher in specialized configurations), marking a qualitative leap compared to non-clog submerged sewage pump.

The self-priming pump operates on a unique principle utilizing patented impellers and separation discs to achieve forced gas-liquid separation during suction. Its design, size, weight, and efficiency closely resemble those of pipeline pumps. This pump requires no auxiliary equipment such as foot valves, vacuum valves, or gas separators. During normal operation, it eliminates the need for liquid priming, boasting exceptional self-priming capability that effectively replaces widely-used non-clog submerged sewage pump (low-level liquid transfer pumps). It can also serve as auxiliary equipment for separators, tanker transfer pumps, self-priming pipeline pumps, and motorized pumps.

Another advantage of the self-priming pump, or its key feature, is that after the pump chamber is initially filled with the liquid, it can directly run dry to draw the medium into the pump (with a dry running time not exceeding 7 minutes). This prevents accidents caused by accidental operation that might burn out the motor during dry running, significantly reducing operational risks while enhancing the pump's efficiency.

Advantages and disadvantages of non-clog submerged sewage pump

Advantages

1. The non-clog submerged sewage pump is directly installed on the storage of the medium to be transported, without extra floor space.

2. The traditional non-clog submerged sewage pump features a unique centrifugal double-balanced impeller, delivering clean media containing solid particles with exceptionally low vibration and noise while maintaining high efficiency. When using the open-type double-balanced impeller, it effectively transports contaminated liquids containing solid particles and short fibers, ensuring smooth operation without clogging.

 Disadvantages

1. It is necessary to increase the intermediate tank, and the liquid level of the intermediate tank should be controlled during operation;

2. The maintenance is complex and requires regular replacement of seals.

3. High maintenance rate and high cost;

4. Need sealed air;

5. The traditional non-clog submerged sewage pump is not suitable for the transportation of flammable and explosive materials.

6. The new type of non-clog submerged sewage pump is not suitable for conveying highly corrosive materials with particles.

non-clog submerged sewage pump have distinct advantages and disadvantages, and even more disadvantages than advantages. At the same time, many industries now prohibit the use of non-clog submerged sewage pump and replace them with self-suction pumps, which may not be entirely due to the difficulty of maintenance caused by their own structure.

The reason of the high noise of non-clog submerged sewage pump

1. Mechanical aspects

The unbalanced mass of rotating parts of FRP non-clog submerged sewage pump, poor quality of crude production, poor installation quality, asymmetrical shaft of unit, swing exceeding allowable value, poor mechanical strength and stiffness of parts, bearing and sealing parts wear and damage, etc., will produce strong vibration.

2. The quality of the water pump and other aspects

The unreasonable design of the inlet channel makes the deterioration of the inlet conditions and the generation of vortex. It will lead to the vibration of the long shaft non-clog submerged sewage pump. The uneven settlement of the foundation supporting the non-clog submerged sewage pump and motor will also lead to the vibration.

3. Causes of bearing damage of non-clog submerged sewage pump

The bearing was damaged due to prolonged operation of the non-clog submerged sewage pump, which caused the lubricating oil to dry out. Carefully identify the source of the noise and replace the bearing.

4. Caused by hydraulic factors

The most common causes of vibration of non-clog submerged sewage pump unit are cavitation and pressure fluctuation in the pipeline.

5. Electrical aspects

The motor is the main equipment of the unit. The magnetic imbalance inside the motor and the imbalance of other electrical systems often cause vibration and noise.

6. Causes of impeller shaking of non-clog submerged sewage pump

The corrosion-resistant non-clog submerged sewage pump impeller nut shakes due to corrosion or overturning, causing significant impeller movement, which results in excessive vibration and noise.

Precautions and installation diagram for self-suction pump

Installation notes for self-priming pumps

1. Before installing a self-priming pump, construct a concrete foundation matching its base dimensions, with anchor bolts pre-installed during the process. This foundation is specifically designed for large self-priming pumps, as smaller models do not require such a foundation.

2. Before installing the self-priming pump, carefully inspect all bolts for looseness and check the pump body for foreign objects to prevent impeller damage during operation.

3. Position the self-priming pump on the concrete foundation, place an isolation pad between the base plate and the foundation, and adjust the pad's height to align the pump horizontally. After adjustment, tighten the bolts.

4. The suction and discharge pipes of a self-priming pump must not be propped up by the pump itself. Instead, they require separate supports to ensure proper alignment. The diameter of both inlet and outlet pipes must match the pump's specifications, with particular attention to the inlet pipe. Any reduction in diameter during installation will compromise the pump's self-priming height. If the inlet pipe is installed with a smaller diameter, the outlet pipe must also be proportionally reduced. We recommend using pipes with diameters that match the manufacturer's standard specifications for optimal performance.

5. When encountering a self-priming pump with a dust cover at the inlet/outlet, remove the cover and connect it to the pipeline. Note that if using a self-priming pump with rapid water suction, the outlet pipe must extend vertically upward for at least 1 meter before bending. Otherwise, the water in the pump body may be completely drained during the priming process.

6. For maintenance convenience and operational safety, a regulating valve should be installed at both the inlet and outlet of the self-priming pump. Additionally, a pressure gauge must be placed between the outlet valve and the pump to ensure it operates within its rated flow and head range, thereby guaranteeing normal operation and extending the pump's service life.

7. Before starting the self-priming pump after installation, rotate the pump shaft and fill the pump chamber with liquid to ensure complete drainage. Inspect for leaks and verify the impeller has no friction or jamming. If any issues are detected, disassemble the pump to diagnose and resolve the problem.

Precautions for self-suction pump

1. Before using a self-priming pump, ensure the pump chamber is completely filled with liquid. Never run the pump dry. However, if the pump is designed for dry operation, it may be used without liquid.

2. Before using a self-priming pump, open both inlet and outlet valves. After connecting the power supply, press the start button to check if the motor rotates in the correct direction as indicated.

3. The outlet valve of the self-suction pump must not be completely closed when in use. If the liquid delivery must be stopped, the inlet valve should be closed, but the duration should not exceed 2 minutes. If it exceeds, the machine should be stopped to avoid damage to the self-suction pump.

4. After stopping the self-priming pump, fully close both inlet and outlet valves. For media prone to solidification, first close the inlet valve and let the pump run for 1-2 minutes to drain the liquid from the pump chamber.

Reasons and solutions for the failure of self-suction pump

1. The self-priming pump fails to draw water because its suction pipe is not properly sealed, causing the pump to remain in a continuous air-suction state.

Solution: Check the inlet pipe of the self-suction pump and repair the leakage point of the sealing, such as the welding place, pipe joint and other suspected leakage places. Carefully check, for example, you can run for about 5 minutes and then stop the machine. Listen to the suction sound close to the pipe.

2. After a period of use, the self-suction pump will suffer from corrosion or wear, and the mechanical seal will leak water, which will be the reason why the self-suction pump can not suck water.

Solution: Replace the damaged part with a new one.

3. The reason why the self-suction pump cannot suck water is that the pipeline or the bottom valve or even the pump body is blocked due to the large amount of impurities in the liquid conveyed.

Solution: Find the specific blockage point and clean out the debris to solve the problem.

4. Improper installation of imported pipelines, such as excessive elbows (number should be controlled to 1-2), or using 45-degree elbows when there are two elbows, may cause the self-priming pump to fail to draw water. Additionally, arbitrarily enlarging the pipeline diameter without matching the pump's specifications can also lead to this issue.

5. If the self-priming pump fails to draw water during its second operation after initial suction, it indicates air has entered the pump body. This typically occurs when the outlet pipe lacks a check valve, allowing air to enter through the atmospheric connection. After shutdown, water may backflow and air could be trapped inside. To resolve this, the pump must be primed with water before restarting to purge the trapped air and ensure proper water intake.

The solution of this kind of self-priming pump is to install a globe valve at the outlet and close the outlet valve before stopping the pump.

6. When the self-priming pump is installed and used, the water suction height exceeds the allowable suction height of the pump.

It is recommended to replace the self-priming pump with a higher self-priming height or to use a non-clog submerged sewage pump instead.

NON-CLOG SUBMERGED SEWAGE PUMP Operating Instructions and Maintenance

Operating Instructions and Attention Remarks

 1. Before operation, check carefully whether there are any damages to pump and motor, and the conditions of fastening pieces.

2. Turn the pump to check whether there is any sound of abrasion, and also the concentricity of pump shaft and motor shaft. The cylindrical deviation of the two couplings should not exceed 0.5mm.

3. The pipeline connected to the liquid outlet shall be supported separately, its weight is not allowed to be placed upon the pump body.

4. Except for special conditions, pump shall be fitted with a full automatic pump control cabinet. Never connect it directly to power grid or by use of knife switch to ensure normal operation.

5. Don’t let the pump always running at low head. Normally, the service head should not be lower than the 60% of the rated head, and should better be controlled within the range of the suggested service head, so that motor would not be burnt out due to the overload of pump.

Maintenance

1. Pump should be managed and operated by a special person, who shall check regularly the circuit and working conditions of the pump.

2. Every time after use, especially after being used to handle viscous serosity, let the pump running for several minutes in clean water to avoid anything deposited inside the pump and to keep the pump clean.

3. Normally, after 300-500 work hours, fill or replace the oil in the chamber with 10-30# oil, thus to maintain good lubrication at mechanical seal and to improve the service life of mechanical seal.

4. The sealing ring between impeller and pump body is performed to seal, which can directly affect the performance of pump if it is damaged, and shall be replaced if necessary.

In the increasingly competitive industrial packaging field, the production efficiency and quality of valve bags directly impact your market responsiveness and cost control. Say goodbye to the traditional model of unstable efficiency, reliance on human judgment for quality control, and lengthy changeover times. Xiamen Gachn gourp FK008 full servo valve bag making machine provides you with a one-stop, intelligent bag-making solution using cutting-edge technology.

Is your bag-making workshop facing the following challenges?

Production speed is hitting a bottleneck, making it difficult to meet peak season order demands?

Frequent quality issues such as bag size deviations and loose valve adhesion lead to customer complaints?

Complex and time-consuming machine setup when changing production specifications results in significant waste of materials and time?

Over-reliance on skilled operators and a lack of effective data management?

If any of these issues resonate with you, then the FK008 will be the key to breaking through your limitations.

I. Ultimate Efficiency: Full Servo Drive, Unleashing the Production Potential of 120 Bags/Minute

Traditional mechanical transmission methods are limited in speed and difficult to adjust. The FK008 employs a full servo drive system, giving the equipment flexible "joints and muscles."

High-speed and stable operation: The equipment operates at a stable speed of up to 120 bags/minute, allowing you to achieve output far exceeding competitors per unit time.

Quick changeover: Parameters such as bag length and width are set with a single touch on the touchscreen, and the servo system automatically adjusts accordingly, significantly shortening specification changeover time and improving responsiveness for small-batch, multi-specification orders.

II. Precision and Reliability: Top-tier components and unique processes ensure perfect quality for every bag.

We believe that stability stems from precise control of every detail.

Globally leading web guiding system: Utilizing web guides from German brands such as BST/FIFE, it ensures that the centerline error of the roll material is stably controlled within ±1mm during transport, laying a precise foundation for subsequent cutting and laminating processes.

Patented Bag Opening and Forming Technology: A unique bag opening process combining negative pressure adsorption and a servo lever ensures stable bag opening and full forming, providing optimal conditions for subsequent valve sealing and filling.

Constant Temperature Heat Sealing Welding: A professionally designed welding system equipped with constant temperature control ensures uniform, firm, and reliable welding strength between the valve and the bottom label, preventing delamination and leakage.

III. Intelligent Inspection: A vision system acts as a "quality inspector," significantly reducing the defect rate.

Human eye inspection is prone to fatigue and oversights. The FK008 can be equipped with a high-speed vision inspection system, giving product quality "eagle eyes."

Dual Camera Collaborative Operation: One 4K linear infrared camera inspects the base fabric appearance, and one 4K linear monochrome camera inspects the bag opening appearance.

Ultra-Low Rejection Rate: The system achieves an excellent rejection rate of <0.15% and a scrap rate of ≥96.5%, automatically rejecting defective products to ensure only qualified products flow out, effectively protecting your brand reputation.

IV. Stable and Durable: International Brand Components, Building the Equipment's "Strong Heart"

Investing in equipment is about long-term return on investment. The FK008 makes no compromises on core components:

Control System: Schneider PLC, servo motors, and touchscreen ensure accurate and stable commands during long-term operation.

Pneumatic System: SMC (Japan)/FESTO (Germany) cylinders and solenoid valves provide durable and reliable power.

Actuators: Japanese SHIMPO servo planetary reducers and NSK bearings ensure smooth transmission and long-lasting durability.

This is not just a configuration list, but our solemn commitment to low failure rate and long lifespan for our equipment.

V. Worry-Free Service: From Installation to Production, We Provide Comprehensive Support

We offer more than just equipment; we provide a complete solution.

Professional Training: We send technicians to your factory to provide comprehensive training on equipment operation, adjustment, and troubleshooting.

Robust Warranty: The equipment comes with a one-year warranty and lifetime technical support.

Spare Parts Support: A set of easily damaged parts is provided randomly, along with a clear list of easily damaged parts, giving you peace of mind.

Choosing the FK008 full-servo valve bag maker means choosing to inject new genes of efficiency, precision, intelligence, and reliability into your packaging production line. This is not just an equipment upgrade, but a comprehensive leap forward in your market competitiveness.

Take action now and let FK008 empower your business growth!

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Download the FK008 detailed technical parameter manual now