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Pneumatic flange stop valve

  • [valve model]: J641H,J641Y,J641W
  • [diameter specification]: DN50~DN300
  • [structural form]: Through
  • [valve body material]: Cast steel WCB, stainless steel 304, stainless steel 316
  • [nominal pressure]: PN16-PN160
  • [applicable temperature]: -29℃-550℃
  • [application scope]: Sewage, environmental protection, petroleum, chemical industry, electric power industry, etc
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  •  Pneumatic flange stop valve

Product overview

The pneumatic flange stop valve j641h-16c is mainly composed of flange stop valve and pneumatic actuator, pneumatic control element, signal switch, (can be equipped with handwheel mechanism) and other related parts. It is an automatic control equipment driven by compressed air. The air source enters the pneumatic actuator to drive the cylinder, and connects the valve rod, spool and valve disc to do lifting movement. The sealing surface of valve body (disc) and valve seat of pneumatic flange stop valve is sealed with conical surface, which has small closing force, erosion resistance and reliable sealing. The valve seat can be a replaceable valve seat, which can be combined with the sealing surface material of the closing part to meet the working condition requirements and prolong the service life.
 Structure diagram of pneumatic flange stop valve
Structure diagram of pneumatic flange stop valve
Pneumatic stop valve actuator:
 
The pneumatic actuator of flange pneumatic cast steel globe valve is generally pneumatic spring piston type and pneumatic cylinder piston type. The former is single acting spring return type, and the latter is double acting air closing and air opening type. The pneumatic flange globe valve adopts the self sealing working principle. The medium enters the valve cavity from the top of the valve disc. Under the action of medium pressure, the closing force of the stop valve is small, but the opening force is large. The diameter of the valve stem can reduce the impact force of the fluid correspondingly. At the same time, under the action of medium pressure, this type of valve is also more tight. Pneumatic stop valve is generally fully open and fully closed, so throttling and regulating are not recommended.

technical parameter

Nominal diameter DN50~DN300
Nominal pressure PN1.6、2.5、4.0、6.4MPa
control mode Pneumatic control (air drive)
Connection form Flange type
Gland type Bolt compression type
Flange standard national standard
working temperature -29℃-550℃
Scope of application Oil, steam, etc

Principle of pneumatic flange stop valve:
 
The pneumatic stop valve uses the characteristics of compressed air to push multiple groups of combined pneumatic pistons in the actuator to transmit force to the crossbeam and inner curve track to drive the air core spindle to rotate. The compressed air disk is transported to each cylinder to change the air inlet and outlet position to change the rotation direction of the spindle. According to the requirements of the rotation torque required by the load stop valve, the number of cylinder combinations can be adjusted to drive the load to stop The valve works.

Design standard of pneumatic flange globe valve:
Design and manufacture GB/T12235
Structural length GB/T12221
Flange size JB/T79 

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 customer's purchase list, our company will provide customers with valve quotation "price list", model selection "valve model" and technical guidance as soon as possible.

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、 The company configures all kinds of 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 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 different types and quantities of orders, the product processing cycle is generally 3 to 30 days, 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 order as early as possible.
6、 According to the needs of customers, our company provides network distribution services, delivering goods to the branches (offices) in major cities, and providing door-to-door delivery service. After the product acceptance, our company will provide after-sales service.
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