Pneumatic cut-off butterfly 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 cut-off butterfly valve

  • [Valve model]: D671X,D641X,D673H,D643H
  • [Diameter specification]: DN50～DN1200
  • [Structure]: Central line type, three eccentric
  • [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 on-off butterfly valve (also known as pneumatic cut-off butterfly valve) is generally used for the on-off control of media in industrial pipelines, and the air source pressure is used to drive the disc plate to fully open or fully open. Pneumatic switch butterfly valves can generally be divided into normally open or normally closed types 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 circuit failure. The opening and closing speed of the pneumatic cut-off butterfly valve is very fast, especially suitable for quick opening and closing or emergency cut-off occasions.
Pneumatic switch butterfly valve (wafer type) Pneumatic switch butterfly valve (flange type)
Pneumatic switch butterfly valve application:
 
The pneumatic switch butterfly valve can be divided into flange type and wafer type according to the connection mode, and can be divided into metal seal and soft seal according to the different sealing materials. It can be applied to different media, different temperatures and different working conditions. It has the advantages of strong adaptability, good sealing performance, convenient installation, etc. 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 is simple in structure, easy to install, disassemble and maintain, and has a wide range of applications.
2. The two-way sealing function can be installed in any direction, and the installation is not affected by the flow direction and spatial position of the media.
3. The pneumatic cut-off butterfly valve only needs to rotate the disc 90 degrees to complete the opening and closing action. The operating torque is small, labor saving, and the opening and closing speed is fast.
4. The single acting actuator can effectively prevent the automatic spring return from closing or opening the valve when the air source is cut off or the pipeline fails.
5. The pneumatic cut-off butterfly valve receives the on-off signal of the control system to accurately control the valve opening and closing, so as to strictly cut off 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
Structure length: GB/T12221-1989
Pressure test: GB/T13927-2000; JB/T9092-1999

Applicable media: air, water, sewage, steam, gas, oil, etc
Strength test: 0.9 1.5 2.4 3.75
Sealing test: 0.66 1.1 1.76 2.75
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 butterfly valve (wafer 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 wafer type
Action range 0-90°
Drive mode Pneumatic control, pneumatic 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 (switch two position 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, 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.