Pneumatic thin film high-pressure cage sleeve regulating valve

1、 Product Introduction:

Pneumatic diaphragm regulating valve has a large flow coefficient, high regulation accuracy, and stable operation. Pneumatic diaphragm regulating valve is a new type of regulating valve with advanced level in the 1980s. It is composed of a multi spring pneumatic diaphragm actuator and a top guided through low flow resistance single seat valve. It has a compact structure, light weight, sensitive action, S-shaped fluid channel, small pressure drop loss, large valve capacity, precise flow characteristics, and can be equipped with electric pneumatic valve positioning or pneumatic valve locator to achieve automatic adjustment and control of process pipeline fluid medium. It is widely used for precise control of process parameters such as pressure, flow rate, temperature, liquid level, etc. of gas, liquid, steam and other media to maintain them at given values. It is a new generation of universal regulating valve products that comply with IEC standards.

2、 Product features:

ZJHM-100KPneumatic thin film high-pressure cage sleeve regulating valveComposed of a pneumatic thin film multi spring actuator and a compact single seat valve. It has reliable operational performance, precise flow characteristics, large adjustable range, small valve seat leakage, stable operation, low height and light weight of multi spring actuator, simple equipment, compact valve body structure, smooth flow channel, and a large flow coefficient. Suitable for situations with strict requirements for leakage, low pressure difference before and after valves, and media with certain viscosity and low fiber content.

Pneumatic proportional control valves can be divided into two types based on their switching modes: gas closed and gas open

1. The gas shut-off valve consists of a positive acting actuator and a valve. When the input signal pressure changes from the lower limit value to the upper limit value, the valve switches from fully open to fully closed.

2. The pneumatic valve consists of a reaction actuator and a valve. When the input signal pressure changes from the lower limit value to the upper limit value, the valve switches from fully closed to fully open.

3、 Product application:

Pneumatic thin film regulating valve is a new generation of regulating valve products that comply with IEC standards, with small size, light weight, precision, and high efficiency. It is suitable for the production process control system of general fluid media and process conditions in various industrial sectors such as chemical, petroleum, metallurgy, and power plants. This product consists of a new type of pneumatic multi spring thin film actuator and a low flow resistance sleeve valve. Its features are as follows: 1. Adopting a balanced valve core, it has a small unbalanced force, allows for a large pressure difference, and operates stably. 2. The large guiding surface of the valve core can improve the vibration caused by eddy currents and impacts, and reduce damage. 3. Reduce noise by about 10dB compared to ordinary double seat regulating valves. 4. The structure is simple and easy to assemble, disassemble, and maintain.

4、 List of main components and materials of the product:

1. Valve body and cover: HT200, ZG230-450, ZG1Cr18Ni9Ti

2. Valve core and seat: 1Cr18Ni9Ti, welded with Stellite alloy

3. Soft seal valve core: reinforced polytetrafluoroethylene

4. Packing: polytetrafluoroethylene, flexible graphite

5. Bellows: 1Cr18Ni9Ti

6. Gasket: Rubber asbestos board, 10, 1Cr18Ni9Ti, asbestos wrapped gasket

7. Membrane cover: A3

8. Corrugated film: rubber clip reinforced polyester fabric

9. Spring: 60SIMN

10. Valve stem and push rod: 2Cr13, 1Cr18Ni9Ti

11. Lining: 2Cr13

5、 Structural classification:

ZJHM-100KPneumatic thin film high-pressure cage sleeve regulating valveThe internal structure is a pressure balanced regulating valve (balanced cage type), and the fluid channel of the valve body is S-shaped. There is no guiding wing to improve the smooth flow of liquid around the sleeve. The advantages are small compression loss, large flow rate, wide adjustable range, high accuracy of flow characteristic curve, good dynamic stability, low noise, and small cavitation corrosion. The regulating valve is equipped with a multi spring thin film actuator, which has a compact structure and high output force. Suitable for controlling high temperature and low temperature high-pressure fluids.

The internal structure of pneumatic diaphragm regulating valves can be divided into three types: single seat type, sleeve type, and double seat type.

6、 Product application case:

7、 The difference between pneumatic control valves and electric control valves:

1. The main advantages of pneumatic control valves and pneumatic actuators are:

Accept continuous gas signals and output linear displacement (after power on/gas conversion devices, continuous electrical signals can also be accepted), and some can output angular displacement when equipped with rocker arms. It has positive and negative functions. The movement speed is high, but the speed slows down when the load increases. The output force is related to the operating pressure. High reliability, but the valve cannot be maintained after the gas source is interrupted (it can be maintained after adding a protective valve). It is inconvenient to implement segmented control and program control. Easy maintenance and good adaptability to the environment. The output power is relatively high. It has explosion-proof function.

2. Advantages of electric control valve:

Valve electric actuators are mainly used in power plants or nuclear power plants because a smooth, stable, and slow process is required in high-pressure water systems. The main advantages of electric actuators are high stability and user applicable constant thrust. The thrust generated by large actuators can reach up to 225000kgf, and only hydraulic actuators can achieve such a large thrust. However, the cost of hydraulic actuators is much higher than that of electric actuators. The anti deviation ability of electric actuators is very good, and the output thrust or torque is basically constant, which can effectively overcome the unbalanced force of the medium and achieve accurate control of process parameters. Therefore, the control accuracy is higher than that of pneumatic actuators. If equipped with a servo amplifier, it is easy to achieve the exchange of positive and negative effects, and it is also easy to set the cut-off signal valve position state (hold/fully open/fully closed). In case of a fault, it must stay in its original position, which pneumatic actuators cannot do. Pneumatic actuators must rely on a combination protection system to achieve position protection.

8、 Accessories for regulating valve (electrical valve positioner):

Electric valve positioner is the main supporting instrument for pneumatic diaphragm regulating valves in industrial automation. It can be used to improve the linearity of valve position, overcome the friction force of valve stem, and eliminate the influence of unbalanced force of regulating valve, so as to ensure that the valve position is proportional to the current signal of 0-10mA DC or 4-20mA transmitted by the control system or regulating instrument, and achieve correct positioning. Our company offers various models and specifications of electric pneumatic valve positioners (HEP-15 explosion-proof type, HEP-17 intrinsic safety type). It can also be equipped according to different needs (ZPD2000 series, EP3000 series, EP4000 series, YT1000 series, YT2000 series, SIPART PS2 Siemens series and intelligent locator series products).

Intelligent Electrical Valve Positioner Manual:

Thank you for choosing our company's products. Our company's products are produced and inspected according to strict and unified quality management regulations before leaving the factory. In order to use this product more accurately and effectively, please read this manual carefully before installation or use. This manual must be handed over to the end user.

The content of this manual is subject to change without prior notice.

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If there are any issues with matters not specified in this manual, please contact our company.

The parameters in this manual are applicable to the model and usage conditions of this product, and may not meet special conditions. When the parameters, structure, components, etc. of the product change, the content of this manual is subject to change.

Safety precautions and product guarantee content and period

For the safety of installation personnel, products, and systems, it is necessary to follow the safety precautions stated in this manual when installing this product.

Our company will not provide compensation for personal injury or material damage caused by incorrect use of this product by the user.

In principle, the warranty period of the product shall be based on the warranty period indicated on the quotation.

During the warranty period, our company will charge for repairs if any problems occur due to the following reasons.

The problem arises when users arbitrarily decompose the product or fail to maintain it correctly. Problems arising from improper transportation and storage. Problems arising from exceeding the rated parameters of the product. Problems caused by incorrect installation.

Problems arising from natural disasters such as fires, earthquakes, storms, floods, lightning, and other natural disasters, as well as riots, wars, radiation, and other man-made disasters.

Explanation on Electrical and Pneumatic Safety

During the installation, electrical and pneumatic connections, as well as debugging of MSP-32, it is required to be carried out by skilled professionals.

Ensure to work within all electrical safety indicators.

When installing electrical circuits, follow the "Power Connection" requirements on page 11.

When installing protective devices electrically, all regulations and standards should be followed, especially those related to explosion prevention.

When installing and debugging equipment, it is necessary to follow the safety instructions related to pneumatic actuators, and pay special attention to the potential danger of injury caused by high pressure in the actuator.

The operator needs toOnly personnel familiar with the installation, debugging, operation, and maintenance of locators or similar devices are allowed to operate locators. Specifically:

Professional personnel familiar with process automation safety regulations;

Experienced debugging and maintenance personnel, who have received qualified training to install, debug, repair, and maintain valve positioners or similar equipment;

Technical personnel who are familiar with the operation of self-control equipment and understand the specific content of the operating instructions.