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Pneumatic cut-off butterfly valve

  • [valve model]: D671X,D641X,D673H,D643H
  • [diameter specification]: DN50~DN1200
  • [structural form]: Central line type, three eccentricity
  • [valve body material]: Cast steel WCB, stainless steel 304, stainless steel 316
  • [nominal pressure]: PN6、PN10、PN16、PN25、PN40
  • [applicable temperature]: -40℃~450℃
  • [application scope]: Gas, water, oil, steam, corrosive fluid
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  •  Pneumatic cut-off butterfly valve

Product features

Pneumatic switch butterfly valve (also known as pneumatic cut-off butterfly valve) is generally used to cut off the medium in two positions in the industrial pipeline. It uses the air source pressure to drive the disc plate to do full open or full open action. Pneumatic switch butterfly valve can be generally divided into normally open type or normally closed type according to the action form, that is, the valve is open or closed when it is not working, and it can automatically reset to the open or closed state when there is no air source, power failure or gas path fault. The opening and closing speed of pneumatic cut-off butterfly valve is very fast, especially suitable for quick switch or emergency cut-off occasions.
Pneumatic switch butterfly valve (clamp type) pneumatic switch butterfly valve (flange type)
Application of pneumatic switch butterfly valve:
 
Pneumatic switch butterfly valve can be divided into flange type and clip type according to the connection mode. It can be divided into metal seal and soft seal according to different sealing materials. It can be used in different media, different temperatures and different working conditions. It has the advantages of strong adaptability, good sealing performance and convenient installation. Pneumatic cut-off butterfly valve can be widely used in steam, gas, environmental protection, petroleum, chemical, sewage and other industrial pipelines for remote centralized control or local control.
 
Advantages of pneumatic switch butterfly valve:
 
1. The pneumatic cut-off butterfly valve has the advantages of simple structure, easy installation and disassembly, convenient maintenance and wide application range.
2. Two way sealing function, can be installed in any direction, installation is not affected by the medium flow direction and space position.
3. The pneumatic cut-off butterfly valve only needs to rotate the disc plate 90 degrees to complete the switch action, which has the advantages of small operation torque, labor saving and fast switching speed.
4. The single acting actuator can effectively prevent the automatic spring return to close or open the valve when the air source is cut off or the pipeline fails.
5. The pneumatic cut-off butterfly valve receives the switch signal of the control system to accurately control the valve switch, so as to achieve the tight cut-off of the medium in the pipeline.

Standard Specification for pneumatic switch butterfly valve:
Design standard: GB / t2238-1989
Flange connection size: GB / t9113.1-2000; GB / t9115.1-2000
Structural length: GB / t12221-1989
Pressure test: GB / t13927-2000; JB / t9092-1999

Applicable media: air, water, sewage, steam, gas, oil, etc
Strength test: 0.91.52.43.75
Sealing test: 0.661.11.762.75
Low pressure air tightness test: 0.5 ~ 0.7
Applicable temperature: soft seal: - 29 ℃ ~ 180 ℃; hard seal: - 40 ℃ ~ 600 ℃
 Structure diagram of pneumatic switch butterfly valve
Pneumatic switch butterfly valve (flange type) pneumatic switch type butterfly valve (clamp type)

technical parameter

Nominal diameter DN50~DN1200(mm)
Pressure rating PN0.6、1.0、1.6、2.5、6.4MPa
Connection mode Flange type or clamp type
Range of motion 0-90°
Driving mode Pneumatic control, air source drive (with handwheel)
Air supply pressure 0.4~0.7MPa
Sealing material Metal seal, PTFE seal, rubber seal
Workplace Liquid, steam, oil, corrosive medium, etc
control mode Switch mode (two position switch off) Air to open, air to close Spring return
Attachment options Positioner, solenoid valve, air filter pressure reducer, retaining valve, travel switch, valve position transmitter, hand wheel mechanism, etc

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 of your company, the name of your company and the place of delivery, the name of your company and the place of delivery 021-36311208 Consultation or telephone: 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) Material, such as stainless steel valve body
(2) Connection type (e.g. flange, thread, clamp...)
(3) Nominal diameter, pipe size
(4) Ambient temperature 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.