Anhui Changyu Pump & Valve Co., Ltd. is located in the Pump & Valve Industrial Park of Jingxian County, Xuancheng City, Anhui Province. The fluoroplastic lined pumps produced in our park occupy about 70% of the market share in China. In recent years, they have been widely recognized by customers all over the country and overseas. The following are the main reasons why fluoroplastic lined centrifugal pumps are popular in the market:

1. Excellent corrosion resistance

1) Excellent material properties

Fluoroplastics (such as PTFE, FEP, PFA) have extremely strong corrosion resistance and can withstand almost all strong acids (such as sulfuric acid, hydrochloric acid, nitric acid) and strong alkalis (such as sodium hydroxide, sodium hypochlorite, etc.), as well as a variety of organic solvents and oxidizing media.

Even in high temperature or high concentration media environment, fluorine-lined materials can maintain their chemical stability to ensure that the pump body is not corroded.

2) Adapt to complex media

It can effectively deal with mixed media (acid-base mixtures), strong oxidizing media (such as aqua regia, chlorine), volatile chemicals (such as mercury vapor, dichloromethane, methanol), etc., and has a wide range of applications.

In the transportation of corrosive liquids, the corrosion resistance of fluorine-lined plastics is better than that of ordinary stainless steel and alloy materials, and it is an ideal choice for handling highly corrosive chemicals.

2. High cost performance and economic benefits

1) Replace expensive metal pumps

Compared with pumps made of expensive materials such as titanium alloy and Hastelloy, fluoroplastic lined centrifugal pumps are cheaper but can provide similar corrosion resistance.

For many small and medium-sized enterprises, fluoroplastic lined pumps are an economical and efficient solution.

2) Long life and low maintenance cost

Fluorine-lined materials are not only corrosion-resistant, but also wear-resistant, which extends the service life of the pump.

The pump body has a simple structure and is easy to maintain, reducing downtime and maintenance costs.

3. Advanced design and reliable performance

1) No leakage and high safety

Fluoroplastic lined centrifugal pumps are usually equipped with mechanical seals or magnetic drive designs to greatly reduce the risk of leakage, such as our UHB series fluoroplastic mortar pumps from Changyu Pumps and Valves.

Suitable for conveying flammable, explosive, highly toxic or corrosive liquids to ensure the safety of operators and the environment.

2) Excellent structural design

Fluoroplastic-lined and pump body substrates are closely combined, which can withstand high-intensity mechanical stress and resist chemical erosion of the medium.

The high-efficiency hydraulic design makes the pump run more smoothly and reduces energy consumption.

4. Wide range of application scenarios

1) Chemical industry

Transports a variety of corrosive media such as strong acids, strong alkalis, and organic solvents.

Applied to processes such as pickling and electroplating liquid circulation.

2) Environmental protection industry

Used for acid-base adjustment and waste liquid transportation in wastewater treatment.

Deal with the safe discharge of highly corrosive waste liquid.

3) Pharmaceutical industry

Transports high-purity, highly corrosive chemicals to ensure the quality and safety of drug production.

4) Metallurgical industry

Transports ore slurry pickling liquid and extraction liquid to solve the corrosive problem in metal processing.

5. Drivers of market demand growth

1) Promotion of environmental regulations

Strict environmental regulations and special working conditions require reducing leakage and pollution, and the leakage-free characteristics of fluoroplastic lined pumps fit this trend.

2) Rapid development of the chemical industry

The increasing demand for corrosion-resistant and high-efficiency pump equipment in the chemical industry has further promoted the market share of fluoroplastic lined pumps.

3) Continuous technological innovation

The improvement of fluoroplastic lined materials and pump body structure has continuously improved product performance and adapted to more complex working conditions. It has extremely high compatibility with other pump parts (such as sealing, gaskets and bearings) and can be flexibly configured in the face of different transport media.

Contact us:

If you are looking for a fluoroplastic lined centrifugal pump suitable for your working conditions, please consult us and we will provide you with a tailor-made solution.

ZTC series voltage transformer PT526

Both Voltage Transformers (VTs) and Power Transformers operate on the principle of electromagnetic induction, but their applications and working mechanisms differ significantly. Below is a simple and easy-to-understand explanation of their differences.

Power Transformers are designed for efficient energy transfer in electrical grids and industries.
Voltage Transformers (Potential Transformers) are used for safe monitoring and protection, ensuring accurate voltage measurement.

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1. Main Differences Between Voltage Transformer and Power Transformer

Purpose

• Power Transformer: Used for transmitting and distributing electrical energy by stepping up or stepping down voltage.
• Voltage Transformer (Potential Transformer - PT): Used for measurement and protection by reducing high voltage to a lower, measurable level.

Working Principle

• Power Transformer: Designed to handle high power and transfer energy efficiently.
• Voltage Transformer: Designed for precision, ensuring accurate voltage measurement while consuming minimal power.

Load Capacity

• Power Transformer: Can handle heavy loads and supply energy to electrical devices.
• Voltage Transformer: Cannot drive a load; only provides a proportional voltage signal to measurement devices.

Structure

• Power Transformer: Larger and bulkier, designed to handle high power levels.
• Voltage Transformer: Compact and designed for precision with high accuracy.

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2. Comparison Table: Voltage Transformer vs. Power Transformer

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3. Working Principle Explained

Power Transformer

• Uses electromagnetic induction to step up or step down voltage.
• Designed to handle high power levels efficiently with minimal loss.
• Example: A power transformer in a substation converts 110kV to 11kV for local distribution.

Voltage Transformer (VT)

• Also works on electromagnetic induction but with minimal power consumption.
• Converts high voltage (e.g., 33kV) into a low voltage (e.g., 110V) for monitoring devices.
• Accuracy is critical to ensure safe operation of electrical protection systems.

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4. Simple Analogy

Think of:

• Power Transformer = A Water Pump – It transfers large amounts of water (power) from one place to another.
• Voltage Transformer = A Measuring Cup – It takes a small portion of the water (voltage) and presents it in a measurable form.

Current transformers (CTs) are essential components in electrical metering, power monitoring, and protection systems. Their accuracy directly influences the precision of power measurement, energy billing, and system protection. Two critical parameters define CT performance: ratio difference (current magnitude error) and phase error. Understanding their impact is vital for selecting the right CT for various applications.

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The Importance of Ratio Difference and Phase Error

Ratio Difference: The Core of Accuracy in Current Measurement

The ratio difference (also known as current magnitude error) represents the discrepancy between the actual primary current and the scaled secondary current when referred back to the primary side. It is a fundamental error type in CTs, directly affecting the accuracy of current measurement.

• Impact on Measurement: A higher ratio difference leads to incorrect current readings, affecting energy billing and system monitoring.
• Regulatory Compliance: Standards like IEC 61869-2 and IEEE C57.13 define allowable ratio differences to ensure CTs meet industry requirements.
• Primary Consideration: In most electrical metering applications, ratio difference is more critical than phase error, as it directly affects metering precision.

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Phase Error: Why It Matters in Power and Energy Measurement

Phase error refers to the angular difference between the primary and secondary currents. Unlike ratio difference, it does not affect the magnitude of the current but significantly impacts power calculation and energy metering.

• Power Measurement: In AC circuits, power is given by the equation:
  $P=V\times I\times \cos \varphi$, where $\varphi$ is the phase angle between voltage and current. A CT with phase error distorts this relationship, leading to incorrect power calculations.
• Energy Billing: Since energy (kWh) is the integral of power over time, inaccurate power calculations due to phase error result in energy billing discrepancies.
• Protective Relaying: Many protection schemes depend on phase alignment between currents from multiple CTs. A significant phase error can cause false tripping or failure to detect faults.

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Which Error is More Important?

• For pure current measurement, ratio difference is the primary concern.
• For power and energy metering, phase error is equally critical because it affects real and reactive power calculations.

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How Phase Error Affects Power Systems

Impact on Power Measurement

In AC circuits, active power (P) and reactive power (Q) depend on the phase relationship between voltage and current:

• Active Power: $P=V\times I\times \cos \varphi$
• Reactive Power: $Q=V\times I\times \sin \varphi$

If a CT introduces phase error, the calculated $\cos \varphi$ value becomes incorrect, leading to significant errors in both active and reactive power measurement.

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Electricity Metering and Billing Errors

Electricity meters rely on precise current and voltage phase relationships to determine energy consumption. A phase error in CTs may result in:

• Overbilling or underbilling customers, leading to disputes with energy providers.
• Incorrect power factor calculations, affecting penalties and incentives in industrial billing.
• Inaccurate load profiling, leading to poor demand-side management decisions.

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Protection Relay Malfunctions

Many protection schemes, such as differential protection and directional relays, depend on precise phase relationships. If a CT has excessive phase error:

• Differential relays may falsely interpret normal conditions as faults, causing unnecessary outages.
• Directional relays might misjudge power flow, leading to incorrect breaker operations.
• Overcurrent relays may experience delayed tripping, increasing the risk of equipment damage.

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Why Does Current Have a Phase?

The Concept of Phase in AC Circuits

In an alternating current (AC) system, both voltage and current follow sinusoidal waveforms. However, due to the presence of inductive and capacitive elements, these waveforms do not always align. The phase difference between them defines the power behavior of the circuit.

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What Causes Phase Difference?

• Inductors (Coils): Inductive elements cause current to lag behind voltage. This is typical in motors, transformers, and chokes.
• Capacitors: Capacitive elements cause current to lead voltage, common in power factor correction applications.
• Resistive Loads: In pure resistive loads (e.g., heaters), current and voltage are perfectly in phase ($\varphi =0$).

The phase error introduced by CTs adds an additional phase shift, further distorting power calculations.

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Phase Error and Energy Metering Accuracy

Why Energy Meters Need Accurate Phase Measurement

In energy metering, correct measurement of both current magnitude and phase angle is essential because:

• Power factor correction depends on precise phase angles to minimize penalties for industrial consumers.
• Utility companies rely on accurate power calculations to manage grid loads and prevent losses.
• Smart meters use phase information to optimize energy distribution and detect power theft.

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How CT Phase Error Affects Energy Billing

A CT with phase error introduces a systematic deviation in power calculations, leading to long-term financial losses for both utilities and consumers. In extreme cases, billing inaccuracies may reach several percentage points, translating to millions of dollars in revenue discrepancies annually.

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Phase Error Exists Only in AC Systems

Why DC Systems Do Not Have Phase Error

In direct current (DC) circuits, current and voltage remain constant over time. Since phase angle is only relevant in alternating signals, DC current transformers do not experience phase error.

• No Frequency Variation: DC has no sinusoidal frequency, so no phase shift occurs.
• Simpler Measurement: Unlike AC CTs, DC current sensors rely on shunt resistors or Hall-effect sensors, eliminating phase error concerns.

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How to Minimize Phase Error in CTs

Design Improvements

• High-quality magnetic cores reduce flux leakage and saturation effects.
• Optimized winding arrangements improve accuracy and reduce distortion.
• Advanced compensation techniques correct inherent phase shifts.

Calibration and Testing

• Periodic calibration ensures compliance with standards.
• Factory and field testing verify phase accuracy before deployment.
• Compensation algorithms in digital meters mitigate minor phase errors.

 

Want your color sorter to last like a seasoned pro? With 20 years of expertise in industrial sorting solutions, HTsorter knows a thing or two about keeping machines running smoothly—whether it’s the best plastic sorting machine for recycling, an AI-powered plastic color sorter for accurate sorting, or an automatic plastic separation machine for industrial use. Here’s how to dodge common pitfalls and squeeze more years out of your equipment.

 

1. Dust Is the Silent Killer—Fight It Daily

Industrial sorting zones are dust magnets, and grime is the enemy of precision. For AI-powered plastic color sorter for accurate sorting, dirty lenses or sensors can tank sorting accuracy overnight. Wipe down inspection windows with a microfiber cloth after each shift, and use compressed air to blast debris from nozzles. For automatic plastic separation machine for industrial use, weekly belt groove cleaning is a must—plastic crumbs here wear down belts and cause misalignment. A quick sweep saves costly repairs.

 

 

2. Small Parts, Big Impact: Don’t Neglect These Components

Dust brushes & filters: Replace them every 3 months. Worn brushes let glass surfaces fog up, tricking AI into misfiring; clogged filters starve air valves of pressure.

Air systems: Drain your compressor tank 3x daily (especially in winter)—frozen water can crack pipes. HTsorter’s best plastic sorting machine for recycling includes self-draining valves to skip the hassle.

Bearings & belts: Grease bearings quarterly, but avoid overdoing it—excess lube traps debris into abrasive clumps.

 

3. Smart Machines Need Smart Care

AI-powered plastic color sorter for accurate sorting learns on the job, but it still needs checkups. Calibrate sensors monthly to adapt to lighting changes, and update software regularly to patch bugs and boost efficiency. When switching materials, don’t force manual adjustments—HTsorter’s automatic plastic separation machine for industrial use offers 30+ preset modes for plastics like PET or PVC. Let the machine do the heavy lifting.

 

 

Why HTsorter?

Two decades of tinkering taught us what machines really need:

Dummy-proof design: Quick-release chambers for no-tool cleaning.

Smart alerts: An app tracks part wear and nags you before failures.

Global backup: From Dhaka recycling plants to Munich factories, we fix issues in 48 hours.

Whether it’s the ruggedness of our best plastic sorting machine for recycling or the pinpoint accuracy of our AI-powered plastic color sorter, HTsorter keeps your operation humming—not hemorrhaging cash.

 

Choosing a suitable color sorter is not simply buying a machine, but finding a solution that fits the production process like a tailor-made one. HTsorter has been deeply involved in the field of premium quality grain sorting equipment for 20 years. We know a truth: choosing the right tool doubles  efficiency; choosing the wrong tool will result in half the effort. Let's put aside the professional terms and get to the core of the problem.

 

 

1. Smart technology should "understand you" instead of "making things difficult for you"

Imagine a machine that can learn while working - this is a real advanced AI color sorter for grains. It can automatically adapt to real problems such as uneven grain size and high environmental dust, just like an experienced quality inspector who can easily pick out moldy rice or tiny impurities. For food processing scenarios, hygiene is the bottom line, so a rice color sorter for food processing must have both AI intelligence and food safety materials, such as an easy-to-clean stainless steel surface design.

 

2. Real durability is more important than fancy features

To put it bluntly, equipment that can't withstand 24/7 operation is an expensive decoration. When choosing, you should look at the "hard power": dustproof body, easy-to-replace parts, and maintenance without high technical thresholds. HTsorter's premium quality grain sorting equipment has been tested in real production environments - from rice processing plants to nut production lines, wherever the environment is harsh, it will go there. Don't be fooled by "high-end models" that need frequent debugging; simplicity and reliability are the key.

 

3. After-sales service cannot be "missing"

No matter how good the machine is, it is afraid that no one will take care of it when it encounters problems. Whether it is sorting rice or grains, suppliers must provide "beyond the manual" support. Need international certification? The system is stuck at 2 a.m.? Reliable partners will solve it quickly. HTsorter equips each grain AI color sorter with a global response team - no robot customer service, only real-person solutions.

 

Why choose HTsorter?

20 years of industry experience has allowed us to understand the pain points of production. Our rice color sorter for food processing are not only highly accurate, but also flexibly upgradeable as your business needs change. From AI technology that “learns on the job” to premium quality grain sorting equipment that outlasts its competitors, we focus on keeping your production line running smoothly, not on making you spend money on equipment.

Benefits of PEGE Loss-in-weight Feeder

 

Typical Nanjing PEGE  loss–in-weight feeders are used to negate the use of weigh hoppers and to eliminate the impact of material. This system is particularly useful when the product to be weighed is sticky and does not have good flow properties.

A. Improve measurement accuracy
B. Reduce premixing workload
C. Improve product stability
D. Reduce dust pollution and be more environmentally friendly.

E. Improve work and production efficiency.

 

Can loss in weight feeder or loss in weight feeding machine feed maleic anhydride, what specific conditions?

 

A loss-in-weight feeder (loss-in-weight feeding machine) can be used for feeding maleic anhydride, but the following specific conditions need to be met:

 

Characteristics and Challenges of Maleic Anhydride

1. **Physical State and Temperature Requirements**

   - Maleic anhydride is a solid at room temperature (with a melting point of approximately 52-54°C) and needs to be heated to a liquid state (usually 60-80°C) for stable conveying.

   - A **heating and heat preservation system** (such as an electrically traced pipeline or a jacket heating system) should be equipped to prevent solidification and blockage.

2. **Strong Corrosiveness**

   - Maleic anhydride has strong corrosiveness to metals (especially ordinary stainless steel), so **corrosion-resistant materials** need to be selected:

     - Materials for parts in contact with the material: **PTFE (polytetrafluoroethylene) lining, Hastelloy C276**.

     - Sealing elements: **fluororubber (FKM) or perfluoroelastomer (FFKM)**.

3. **Safety Protection**

   - Liquid maleic anhydride is prone to volatilizing irritating gases, so a **fully enclosed design** is required, and an **exhaust gas treatment system** (such as condensation recovery or activated carbon adsorption) should be configured.

   - The equipment needs to meet the **explosion-proof certification** (such as ATEX) to avoid risks caused by high temperature or static electricity.

 

 Equipment Selection and Modification Suggestions

1. **Configuration of Suitable Machine Types**

   - **Heating type loss-in-weight feeder**: The hopper and conveying pipeline are integrated with an electric heating/circulating heat medium jacket to maintain the temperature above 60°C.

   - **Corrosion-resistant structure**: Sensors, valves, and pumps in contact with the material need to be made of PTFE or Hastelloy materials.

   - **Anti-crystallization design**: Screw pumps or vibration-assisted discharging are used to avoid local cooling and crystallization of the melt.

2. **Optimization of Operating Parameters**

   - **Temperature control accuracy**: Within ±2°C to avoid excessive thermal decomposition (maleic anhydride may generate maleic anhydride gas at high temperatures).

   - **Feeding accuracy**: It is recommended to select a **high-resolution weighing sensor** (≤0.1% F.S.) to ensure the accuracy of minor addition.

3. **Supporting Systems**

   - **Nitrogen protection**: Fill the hopper with nitrogen to isolate oxygen and prevent oxidation side reactions.

   - **Emergency cooling**: Start the cooling program in case of abnormal shutdown to prevent the residual material from carbonizing.

 

 Precautions

- **Direct contact with water is prohibited**: Maleic anhydride hydrolyzes violently when it comes into contact with water, so strict moisture prevention is required (blow dry air inside the equipment).

- **Maintenance and cleaning**: Thoroughly remove the residual material after shutdown to avoid solid blockage (the pipeline can be purged with hot nitrogen).

- **Safe operation**: Personnel need to wear gas masks and acid-resistant gloves, and emergency flushing facilities should be provided on-site.

 

**Summary**

Maleic anhydride can achieve precise feeding through a **customized loss-in-weight feeder**. The key lies in:

- **Corrosion-resistant materials + precise temperature control + fully enclosed explosion-proof design**.

See our loss in weight feeding machine for MAH feeding.

 

It is recommended to communicate in detail with the equipment supplier about the process parameters (temperature, flow rate, environmental requirements, etc.) and conduct small-scale tests to verify the stability of the system.

Nanjing PEGE can surely provide reliable liquid loss in weight feeder to feed Maleic Anhydride for clients all over the world.

 

 

Cryogenic Deflashing Machine can deburr the PPS material plastic components in an efficient way

 

NANJING PEGE TECHNO cryogenic deflashing machine PG-40T system can do the deburring process,not only for rubber parts, but plasitc parts.
PPS+GF40 material is easilly to have burrs during injection molding, cryogenic deburring is a good way for you to solve this headache problem.

First of all we need to make an analysis of the components:

1. Flash condition： PPS+GF

   Easily to have burrs during the injection process.

   The flashes are many, but they are thin and small which are good for cryogenic deburring
2. Part shape and structure: Round, no fragile angel, not too big, very suitable for cryogenic deflashing
3. Estimation: Burrs can be efficiently deburred in our PG-40T

Temperature	-40°C
Time	4mins
Wheel speed	6000rpm
Media Size	0.75mm
Barrel Speed	8rpm
Qty for one batch	70pcs
This are the parameters for samples testing, more parts can be deflashed in one time.

 

4. Result: Result is good.  No burrs left, feel smooth.

 

After testing and internal inspection, the cryogenic deburring system is approved that it is suitable for PPS+GF plastic parts deburring process.

NANJING PEGE always provide good machine and technology for you to improve efficiency and precision.

How Do PEGE Loss-in-Weight Feeders Work?

PEGE feeders operate on a straightforward yet effective principle:

1. Material Storage: Material is stored in a hopper mounted on load cells. These cells continuously measure the weight of the hopper.
2. Dispensing Mechanism: Using a screw feeder, belt, or vibratory system, the material is discharged at a controlled rate.
3. Weight Monitoring: As the material is dispensed, the system detects the reduction in weight and adjusts the feed rate to match the desired output.
4. Feedback Control: A closed-loop control system ensures that the feed rate remains constant, even as the properties of the material change over time.

This precise monitoring and adjustment minimize errors, making PEGE feeders ideal for processes requiring high levels of accuracy.

Nanjing PEGE loss in weight feeder is good and reliable feeding tool for precision dosing and composing.

 

Understanding PEGE Loss-in-Weight Feeders: Precision in Material Handling

In industries where precision and consistency in material feeding are critical, loss-in-weight feeders play a pivotal role. Among the leading technologies in this space, PEGE loss-in-weight feeders have emerged as a reliable solution, ensuring accurate feeding, reduced material waste, and seamless integration into manufacturing processes. Let’s explore the functionality, benefits, and applications of PEGE loss-in-weight feeders.

What Is a Loss-in-Weight Feeder?

A loss-in-weight feeder is a material handling device designed to deliver precise amounts of material over time. The system measures the weight of the material in the hopper and adjusts the feed rate to ensure accuracy. As the material is dispensed, the system compensates for the decreasing weight, maintaining consistent flow rates.

The "PEGE" in PEGE loss-in-weight feeders signifies a brand or specialized design focusing on robust performance and tailored solutions for specific industrial needs.