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Pneumatic ventilation butterfly valve

  • [valve model]: D641W
  • [diameter specification]: DN50~DN2000
  • [structural form]: Medium line type (flange)
  • [valve body material]: Cast steel WCB, stainless steel 304, stainless steel 316
  • [nominal pressure]: PN2.5、PN6、PN10
  • [applicable temperature]: -Above 40 ℃ to + 450 ℃
  • [application scope]: Air, gas, dust gas, flue gas, cold and hot air, etc
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  •  Pneumatic ventilation butterfly valve

Product features

Pneumatic ventilation butterfly valve is a kind of non airtight rotary butterfly valve used in the ventilation pipeline. It is designed and manufactured by welding the central line type disc plate and short structure steel plate, which is used as the flow regulation or switch control of gas medium. Pneumatic ventilation butterfly valve has the advantages of small flow resistance, high flow coefficient, light weight, fast opening and closing. It can be used with valve positioner to realize proportional adjustment, especially suitable for flue gas control of large diameter and large flow boiler kiln.
 
Advantages of pneumatic ventilation butterfly valve:
1. The valve can be remotely controlled to switch and adjust, which can save time, labor and labor cost.
2. There is no connecting rod, bolt, etc. inside, so it works reliably and has long service life. It can be installed in multi station, not affected by the flow direction of medium.
3. It is designed and manufactured by adopting the new structure form of welding the central line type disc plate and short structure steel plate, with compact structure, light weight, easy installation, small flow resistance, large flow capacity, avoiding the influence of high temperature expansion, and easy to operate.
Standards for pneumatic ventilation butterfly valve:
 
Design standards: GB / t12238-1989, JB / t8692-1998
Flange connection size: GB / t9115.1-2000
Structural length: GB / t12221-1989
Pressure test: GB / t13927-1992, JB / t9092-1999
Strength test: 0.075 0.375 0.9

Sealing test: ≤ 1.5% leakage
Applicable temperature: - 40 ~ + 450 ℃

 
 Structure diagram of QD ventilation butterfly valve

technical parameter

Nominal diameter DN50~DN2000(mm)
Pressure rating PN0.25、0.6、1.0MPa
Connection mode Flange connection
structural style Midline structure
Driving mode Pneumatic control, air source drive (with handwheel)
body material Cast steel WCB, stainless steel 304, stainless steel 316
Sealing material Body sealing
Workplace Gas, gas, air, etc
control mode Switch type (switch two position mode), adjustable type (adjusting disc opening)
Accessories selection 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 (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.