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Pneumatic flange butterfly valve

  • [valve model]: D641X,D641F46,D643H
  • [diameter specification]: DN50~DN1200
  • [structural form]: Central line type, three eccentric (soft seal, hard seal)
  • [valve body material]: Carbon steel, stainless steel 304, stainless steel 316
  • [nominal pressure]: PN10、PN16、PN25、PN40
  • [applicable temperature]: Soft seal ≤ 150 ℃, hard seal ≤ 450 ℃
  • [application scope]: Gas, water, steam, oil, corrosive medium, etc
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  •  Pneumatic flange butterfly valve

Product features

Pneumatic flange butterfly valve is composed of flange type butterfly valve and pneumatic actuator. The flange at both ends of butterfly valve body is connected with pipeline flange, which has the advantages of relatively reliable sealing performance. The pneumatic flange butterfly valve can be divided into elastic seal and metal seal according to the sealing form. The elastic sealing materials include NBR and fluororubber. Among them, the hard sealing butterfly valve is multi-layer metal hard seal, which has the advantages of elastic sealing and has excellent sealing performance no matter in low temperature. Compared with the clip type butterfly valve, the pneumatic flange butterfly valve has higher pressure resistance. In general, flange butterfly valve is used in high pressure conditions.
 Structure diagram of pneumatic flange butterfly valve
Structure diagram of pneumatic flange butterfly valve
Advantages and application of pneumatic flange butterfly valve:
 
Among them, the metal hard seal butterfly valve can ensure high sealing performance in all temperature ranges from ultra-low temperature to ultra-high temperature.
2. Pneumatic flange butterfly valve actuator is divided into single acting and double acting. Single acting has two forms of normally open and normally closed, which can be reset to the initial state (open or closed) in emergency.
3. Valve positioner can be assembled to adjust the parameters of pipeline medium in proportion to realize automatic control.
4. The flow resistance is small. When the medium and large diameter pneumatic flange butterfly valve is fully opened, the flow area is large, and the opening and closing are quick and labor-saving.
5. It is mainly used in oil, metallurgy, chemical industry, electric power, petroleum, urban heating system and corrosive medium as regulating and intercepting equipment.

Standard Specification for pneumatic flanged butterfly valves:
 
Design standard: GB / t2238-1989
Flange connection size: GB / t9113.1-2000; GB / t9115.1-2000; jb78
Structural length: GB / t12221-1989
Pressure test: GB / t13927-1992; JB / t9092-1999
The following accessories can be selected according to different control and requirements:
Cut off type accessories: single electric control solenoid valve, double electric control solenoid valve, limit switch feedback device.
Adjustable accessories: Electric positioner, pneumatic positioner and electric converter.
Air source treatment accessories: air filter pressure reducing valve, air source treatment triple piece.
 Internal structure of pneumatic flange butterfly valve

technical parameter

Nominal diameter DN50~DN1200(mm)
Nominal pressure PN1.0、1.6、2.5、4.0MPa
Connection form flange type connect
Driving form Air source drive (compressed air 5-7bar)
Valve body structure Soft seal (medium line), hard seal (double eccentric, triple eccentric)
Applicable temperature Soft seal ≤ 150 ℃, hard seal ≤ 450 ℃
Leakage Q According to GB / t4213-92, it is 10-4 of Kv value, (soft seal: zero leakage)
body material Carbon steel, stainless steel 304, stainless steel 316
control mode Switch type (two position switch off), adjustable type (4 ~ 20mA control)
Form of action Single acting (normally open, normally closed, spring return), double acting (air on, air off)

Working principle of pneumatic flange butterfly valve:
 
Pneumatic flange butterfly valve through the compressed air into the actuator, driving the actuator to drive the butterfly plate to do a 90 degree rotation movement, used as a pipe switch and flow regulation. The so-called on-off mode control is only used to open and close the valve. The adjustable control is to install the valve positioner in the pneumatic actuator, input the corresponding signal, and carry out the arbitrary adjustment of 0-90 degrees to the butterfly valve disc plate, so as to realize the control of medium flow, pressure, temperature and other parameters. Pneumatic flange butterfly valve has elastic seal and metal seal. Elastic seal butterfly valve, the seal ring can be inlaid on the valve body or attached to the butterfly plate, has excellent sealing performance, but the defect is limited by temperature, which is not suitable for high temperature places. Butterfly valve can be used for long service life of metal seal.  

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.