Pneumatic diaphragm three-way 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 three-way regulating valve

  • [Valve model]: ZJHQ、ZJHX
  • [Diameter specification]: DN20～DN200mm
  • [Structure]: Through cast three-way valve
  • [Valve body material]: Cast steel (WCB), stainless steel (304, 316, 316L)
  • [Nominal pressure]: PN16、PN40、PN64
  • [Applicable temperature]: -196 ℃ - 450 ℃ (see product details for details)
  • [Application Scope]: Liquid, gas, steam and other media
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  • Pneumatic diaphragm three-way regulating valve

Product features

ZJHQ, X pneumatic diaphragm three-way regulating valve is a special regulating valve developed for three-way control, which has two structural forms of confluence and diversion. The valve core structure uses a cylindrical thin-walled window, and uses the side guide of the valve core, which has the advantages of high regulation accuracy, stable and reliable action, etc. The pneumatic diaphragm three-way regulating valve is mainly used to mix two fluids into the third fluid. The split type is mainly used to divide a stream of fluid into two streams of fluid. It can replace two single seat and seat regulating valves that are switches for each other, and is used for the regulation and control of liquid, gas, steam and other media.
Features of pneumatic diaphragm three-way regulating valve:
 
The pneumatic diaphragm three-way regulating valve shall be used for proportional regulation or bypass regulation, especially for the regulation of the fluid temperature control system of the oil industry heat exchanger. When the nominal diameter and pressure difference are small, the combined valve can be used for the split flow occasions, but when the nominal diameter is greater than 80mm and the pressure difference is large, the split flow occasions cannot be interchanged.  
Principle of pneumatic three-way regulating valve:
Diverter valve
Diverter valve		 Combiner valve
Combiner valve

The valve body of the pneumatic three-way control valve is three-way structure, that is, one in two out (split flow type), two in one out (combined flow type). The three-way combined control valve is used to mix two fluids into a third fluid, or two fluids of the same type at different temperatures into fluids of the same temperature. The three-way diverter valve divides one fluid into two streams.

technical parameter

valve body
Form Straight through single seat cast ball valve
Nominal diameter 20、25、32、40、50、65、80、100、125、150、200mm 
Nominal pressure PN16、40、64bar 
Flange standard JB/T79.1-94, 792-94, etc
Materials Cast steel (ZG230450), cast 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 Through cast three-way valve
 
Inner valve assembly
Valve core type Single seat plunger type valve core
Flow characteristics Equal percentage characteristic and linear characteristic
Materials Stainless steel, stainless steel stellite alloy, titanium and corrosion-resistant metal
Pneumatic three-way 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 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.