Pneumatic diaphragm shut-off 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 shut-off valve

  • [Valve model]: ZMQP、ZMQM
  • [Diameter specification]: DN15～DN200mm
  • [Structure]: Through cast valve, three-way cast valve
  • [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]: Liquid, gas (oxygen) medium without impurities and particles
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  • Pneumatic diaphragm shut-off valve

Product features

ZMQ pneumatic diaphragm shut-off valve has the function of quick shut-off. It is composed of a multi spring pneumatic diaphragm actuator and a control valve. The valve body structure has three forms of single seat, sleeve and three-way. It can cut off, connect or switch the fluid in the process pipeline by receiving signals from the control system or regulating instruments. It has the characteristics of sensitive response, reliable action, quick opening and closing. The pneumatic cut-off valve is mainly used in the automatic control system of liquid, gas (oxygen) medium without impurities and particles, which requires fast and tight closing and quick venting.
Structure diagram of pneumatic shut-off valve
Features of pneumatic diaphragm shut-off valve:
 
The pneumatic quick shut-off valve is a new type of high performance shut-off valve with fast action, tight shut-off, safety and reliability. Single seat, sleeve and three-way block valves can be selected according to the allowable pressure difference, medium characteristics and process pipeline requirements. It is widely used in automatic control and remote control system of production process in various industrial sectors such as petroleum, chemical industry, metallurgy, electric power, light industry, textile, etc.  

technical parameter

valve body
Form Through cast ball valve, three-way cast ball valve
Nominal diameter 15. 20. 25. 32. 40. 50. 65. 80. 100. 125. 150. 200mm 
Nominal pressure PN16、40、64bar 
Flange standard JB/T79.1-94, 79.2-94, etc
Materials Cast steel (ZG230-450), stainless steel (ZGICr18Ni9Ti, ZGICr18Ni12M02Ti), etc
Operating temperature 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, impregnated polytetrafluoroethylene asbestos filler, asbestos textile filler, graphite filler
 
Inner valve assembly
Valve core type Single seat plunger type valve core (single seat), pressure balance type valve core (sleeve), V-notch valve core (three-way)
Flow characteristics Go
Materials Stainless steel, stainless steel surfacing Stellite alloy, titanium and corrosion resistant alloy, etc.  

Pneumatic diaphragm shut-off valve actuator:
Actuator
Type ZHA/B multi spring diaphragm actuator
Diaphragm material Ethylene propylene rubber clip nylon cloth, nitrile rubber clip nylon cloth
Spring range KPa 20-100 (standard), 20-60, 60-100, 40-200, 80-240
Air supply pressure 140-400KPa 
Air source interface RCl/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.