Self operated differential pressure 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

Self operated differential pressure regulating valve

  • [Valve model]: ZZCP
  • [Diameter specification]: DN15～DN250mm
  • [Structure]: Through cast valve
  • [Valve body material]: Cast steel (WCB), stainless steel (304, 316, 316L)
  • [Nominal pressure]: PN10、PN16
  • [Applicable temperature]: ≤150℃
  • [Application Scope]: Non corrosive liquid, gas, steam and other media
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  • Self operated differential pressure regulating valve

Product features

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: differential pressure rising valve closing and differential pressure rising valve opening. No additional energy is required. The pressure change of the medium in the process pipeline is used to compare with the signal, so that the force of the regulated medium is balanced with the output force of the actuator, so as to achieve stable pressure and differential pressure values. Self operated differential pressure regulating valve is applicable to non corrosive liquid, gas, steam and other media, and can be used for gas sealing of various oil products, chemicals and liquid storage tanks.
Structure diagram of self operated differential pressure regulating valve
Features of self operated differential pressure regulating valve:
 
The self operated differential pressure regulating valve does not need external energy. It uses the pipeline's own pressure regulation to save energy. The system is simple and low cost. It can be used in the situation without electricity and gas. There is no hidden danger of external energy, and the operation is simple. When setting, it only needs to rotate the adjusting nut. It has the advantages of pressure balance function and high sensitivity. Through the assembly, multiple combination controls can be carried out!

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 (special can be provided by users)    
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 (DN15-125), balance diaphragm (DN150-250)    

Operating principle of self operated differential pressure regulating valve:  
Self operated (differential pressure rising valve closed) control valve, composed of self controlled valve, actuator and a set pressure spring. It is applicable to the differential pressure control of non corrosive liquid, gas and steam in the system pipeline. When the differential pressure rises, the control valve will close.
Self operated (differential pressure rising valve open) control valve, composed of control valve, actuator and a set pressure spring. It is applicable to non corrosive liquid, gas and steam. It is used to control the pressure difference in the system pipeline. When the pressure difference rises, the control valve will open.
Flow coefficient of self operated differential pressure regulating valve:
Rated flow coefficient, noise measurement coefficient, 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 differential pressure (Mpa) PN10 one one point five one point two one
PN16 one point six

Structure of self operated differential pressure regulating valve:
Structure diagram
1  2  3  4  5  6  7  8  9  10  11 
Valve body Valve seat Valve spindle Valve cover Membranous operculum Diaphragm Spring Adjusting nut Impulse piping Balance diaphragm Charging valve

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.