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Self operated differential pressure control valve

  • [valve model]: ZZCP
  • [diameter specification]: DN15~DN250mm
  • [structural form]: Through casting valve
  • [valve body material]: Cast steel (WCB), stainless steel (304, 316, 316L)
  • [nominal pressure]: PN10、PN16
  • [applicable temperature]: ≤150℃
  • [application scope]: Non corrosive medium such as liquid, gas and steam
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  •  Self operated differential pressure control valve

Product overview

The self operated differential pressure regulating valve is mainly composed of control valve, actuator and a set pressure spring. It can be divided into two forms: closing the differential pressure rising valve and opening the differential pressure rising valve. It does not need additional energy. The pressure change of the medium in the process pipeline is compared with the signal to balance the force of the regulated medium and the output force of the actuator, so as to achieve stable pressure and differential pressure. Self operated differential pressure control valve is suitable for non corrosive liquid, gas and steam, and can be used for gas seal of various oil, chemical and liquid storage tanks.
 Structural diagram of self operated differential pressure regulating valve
Features of self operated differential pressure regulating valve:
 
The self operated differential pressure control valve does not need external energy. It uses the pressure regulation of the pipeline to save energy. The system is simple and the cost is low. It can be used in the situation of no electricity and no gas. There is no hidden danger of external energy. It is easy to operate. It only needs to rotate the adjusting nut when setting. It has the advantages of pressure balance function and high sensitivity. Through the assembly, it can carry out multiple combination control!

technical parameter

technical parameter
Nominal diameter DN15、20、25、32、40、50、65、80、100、125、200、250mm     
Nominal pressure PN1.0、1.6MPa     
Flange standard ANSl, JIS, DIN, GB, JB    
Valve body material Cast steel (zg230-450), cast stainless steel    
Valve core material Hard seal: stainless steel (1Cr18Ni9Ti, 1cr18ni12moti)    
Soft seal: stainless steel inlaid rubber ring    
Pressure balance Stainless steel bellows (DN 15-125), balance diaphragm (DN 150-250)    

Working principle of self operated differential pressure regulating valve:  
Self operated (differential pressure rising valve closed) control valve is composed of self-control valve, actuator and a set pressure spring. It is suitable for non corrosive liquid, gas and steam. The control valve is closed when the differential pressure rises.
Self operated (differential pressure rising valve open) control valve. It is composed of control valve, actuator and a set pressure spring. Suitable for non corrosive liquids, gases and vapors. Differential pressure control in the system piping. When the differential pressure rises, the control valve opens.
Flow coefficient of self operated differential pressure regulating valve:
Rated flow coefficient, noise measurement coefficient and allowable pressure difference
Nominal diameter DN (mm)   fifteen twenty twenty-five thirty-two forty fifty sixty-five eighty one hundred one hundred and twenty-five one hundred and fifty two hundred two hundred and fifty
Rated flow coefficient kVs   four six point three eight sixteen twenty thirty-two fifty eighty one hundred and twenty-five one hundred and sixty two hundred and eighty three hundred and twenty four hundred and fifty
Noise measurement coefficient Z value   zero point six zero point six zero point six zero point five five zero point five five zero point five zero point five zero point four five zero point four zero point three five zero point three zero point two zero point two
Allowable pressure difference (MPA) PN10 one one point five one point two one
PN16 one point six

The structure of self operated differential pressure regulating valve is as follows:
Structure sketch
10  11 
Valve body Valve seat Valve shaft Valve cover Membranous cap Diaphragm Spring Adjusting nut Pressure pipe Balance diaphragm Filling valve

Quotation process

Valve price:

Due to the different requirements of order quantity, packaging and delivery mode, as well as the fluctuation of valve raw material price, the valve price will be greatly different. Therefore, the price of our products is not indicated on the website. Please understand.

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

Quotation process:

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

2. After receiving the "valve selection list" and "valve model selection" list, we will provide customers with technical guidance.

3. Specific matters to be agreed: delivery time, special requirements, etc.

Ordering instructions

1、 If the customer has special requirements for the product, the following instructions shall be provided in the order contract:
(1) Valve body material (such as: plastic, cast steel, stainless steel...)
(2) Connection type (e.g. flange, thread, clamp...)
(3) Nominal diameter, pipe size
(4) Ambient temperature and pressure range
(5) Supply voltage, air pressure
(6) Fluid properties (including nominal pressure, temperature, viscosity or acidity or alkalinity)
2、 According to the special requirements of customers. (electric control, pneumatic control)
3、 If the customer provides the determined valve type and model, the customer shall correctly explain the meaning and requirements of the valve model (for details, refer to the description of valve model preparation), and sign the contract under the condition that both parties understand and agree.
4、 After the customer tells the required valve model, specification, quantity and delivery time and place, 20% of the total amount of deposit or full payment shall be timely remitted to our company's account, and the rest shall be remitted before delivery, so as to arrange delivery in time.
5、 After confirming the purchase, our company carries on the production in strict accordance with the delivery date. According to the product type and delivery time, the delivery period is 30 days. In order to ensure that the goods you ordered are in place in time, please order as early as possible.
6、 The company will deliver the goods to the branch offices of our company and deliver the goods according to the needs of our customers. After the product acceptance, our company will provide after-sales service.
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