Pneumatic diaphragm sleeve regulating valve - Shanghai Dongfeng Pump Valve Factory - 上海花千坊_上海龙凤花坛_夜上海最新论坛

Pneumatic diaphragm sleeve regulating valve

  • [Valve model]: ZJHM
  • [Diameter specification]: DN25～DN300mm
  • [Structure]: Pressure balanced valve element
  • [Valve body material]: Cast steel (WCB), stainless steel (304, 316, 316L)
  • [Nominal pressure]: PN16、PN40、PN64
  • [Applicable temperature]: -17 ℃ - 450 ℃ (see product details for details)
  • [Application Scope]: Petroleum, chemical, electric power, metallurgy and other industries
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  • Pneumatic diaphragm sleeve regulating valve

Product features

ZJHM pneumatic diaphragm sleeve control valve is a high performance and large capacity control valve product. With sleeve guidance, it has large guiding area and good stability. It can quickly replace the valve internals online, with high maintenance efficiency, saving manpower and time. The pneumatic diaphragm sleeve regulating valve is widely used because of its good stability and simple maintenance. The pressure balanced valve core eliminates most of the static unbalanced force on the valve disc, and has a certain damping effect, which can reduce the vibration caused by fluid flow. It is especially suitable for situations where the leakage is not high and the pressure difference between the front and back of the valve is large!
Features of pneumatic diaphragm sleeve regulating valve:
 
1. Balanced valve core is adopted, with small unbalanced force, large allowable pressure difference and stable operation.
2. The large guiding surface of the valve core can improve the oscillation caused by vortex and impact, and reduce damage.
3. The noise is about 10dB lower than that of ordinary single and double seat control valves.
4. Simple structure, easy assembly, disassembly and maintenance.
 
Principle of pneumatic diaphragm sleeve regulating valve:
 
The pneumatic diaphragm sleeve regulating valve is an important execution unit of the instrument in the automatic control system. The electro pneumatic valve positioner is used to receive the current signal (0-10mA DC or 4-20mA DC) input from the control system, powered by the electrical signal and compressed air. The regulator converts the compressed air into the air source pressure signal input and output, thus changing the valve opening displacement, Achieve accurate regulation and control of process parameters such as pipeline fluid medium flow, pressure, temperature and liquid level!

technical parameter

valve body
Form Through cast ball valve
Nominal diameter 25. 32. 40. 50. 65. 80. 100. 125. 150. 200. 250. 300mm 
Nominal pressure PN16、40、64bar 
Flange standard JB/T79.1-94, 79.2-94, etc
Materials Cast steel (ZG230450), stainless steel (ZGICr18Ni9Ti, ZGICr18Ni12M02Ti), etc
Upper valve cover Standard type: - 17-230 ℃ Heat dissipation type: 230-450 ℃ Low temperature type: - 60-196 ℃ Bellows sealing type: - 40-350 ℃
Valve cover type Bolt compression type
Filler V-type polytetrafluoroethylene filler, asbestos filler containing impregnated polytetracyanoethylene, asbestos textile filler, graphite filler
Structural form Sleeve type
 
Inner valve assembly
Valve core type Pressure balanced valve element
Flow characteristics Equal percentage characteristic and linear characteristic
Materials Stainless steel, stainless steel stackelite alloy, titanium and corrosion-resistant platform metal, etc.  

Pneumatic diaphragm sleeve regulating valve actuator:
Actuator
Type ZHA/B multi spring diaphragm actuator
Model ZHA/B-22  ZHA/B-23  ZHA/B-34  ZHA/B-45  ZHA/B-56 
Effective area cm2 350  350  560  900  1400 
Stroke mm 10、16  25  40  40、60  100 
Spring range KPa 20-100 (standard), 20-60, 60-100, 40-200, 80-240
Diaphragm material NBR rubber clip nylon cloth, EPDM rubber clip nylon cloth
Air supply pressure 140-400KPa 
Air source interface RC1/4" 
Ambient temperature -30-70℃ 
 
Valve action form
Air close type (B) - valve position open (FO) in case of air loss; Air to open (K) - valve position closed (FC) in case of loss of air
 
enclosure
Positioner, air filter pressure reducer, retaining valve, travel switch, valve position transmitter, handwheel mechanism, etc

Quotation process

Valve price:

Due to the different requirements of order quantity, packaging and delivery method, and the fluctuation of the price of valve raw materials, the price of valves will have a big difference immediately, so our products have not been marked with prices on the website, please understand.

If you select a valve product on this website and need to know the price or obtain relevant technical information, please contact us. We will reply immediately, and can select appropriate valve products for you according to your requirements, so that your procurement process is easy and pleasant.

Quotation process:

1. Please fax the name (or product model) of the valve you selected, the required order quantity, packaging requirements, delivery time, your company name, your company location and contact information to 021-36311208 Or telephone: 021-60547555。

2. After receiving the customer's purchase list, our company will provide the customer with various services such as valve quotation "price list", model selection "valve model" and technical guidance as soon as possible.

3. Specific matters: delivery date, special requirements, etc.

Ordering Instructions

1、 If the customer has special requirements for the product, the following instructions must be provided in the order contract:
(1) Valve body material (such as plastic, cast steel, stainless steel...)
(2) Connection type (such as flange, thread, clamp, etc.)
(3) Nominal diameter, pipe size
(4) Ambient temperature and pressure range
(5) Power supply voltage, air supply pressure
(6) Fluid properties (including nominal pressure, temperature, viscosity or acid-base)
2、 The company configures various driving devices according to the special requirements of customers. (electric control, pneumatic control)
3、 If the customer provides the determined valve type and model, the customer should correctly explain the meaning and requirements of the model (see the description of valve model preparation for details), and sign the contract on the condition that both the supplier and the buyer have the same understanding.
4、 After the customer tells the required valve model, specification, quantity, delivery time and place, the deposit of 20% of the total amount or the full payment for goods shall be remitted to our company's account in time, and the rest of the payment for goods shall be remitted before shipment, so as to arrange shipment in time.
5、 After the purchase is confirmed, our company will produce in strict accordance with the delivery date. The product processing cycle is generally 3 to 30 days, depending on the type and quantity of the order, and the specific delivery time is subject to the contract. In order to ensure that the goods you ordered are in place in time, please try your best to order earlier.
6、 Our company provides network distribution services according to the needs of customers, delivering goods to the branches (offices) of customers in major cities, and implementing door-to-door delivery services. After the products are accepted, our company will provide after-sales service.