Pneumatic cryogenic 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 low-temperature butterfly valve

  • [Valve model]: Pneumatic low-temperature butterfly valve
  • [Diameter specification]: DN50～DN500
  • [Structure]: Medium line type, triple eccentric
  • [Valve body material]: stainless steel
  • [Nominal pressure]: PN6、PN10、PN16
  • [Applicable temperature]: -40℃～196℃
  • [Application Scope]: Liquid helium, liquid hydrogen, liquefied natural gas, liquid nitrogen, liquid oxygen
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  • Pneumatic low-temperature butterfly valve

Product features

The pneumatic cryogenic butterfly valve is mainly applicable to the cryogenic working conditions of liquid nitrogen (cryogenic) media with medium temperature ranging from - 40 ℃ to - 196 ℃. In order to ensure the safe and reliable operation of the cryogenic butterfly valve at low temperature, the valve parts have been cryogenic treated before finishing, and the valve cover adopts a long neck structure, which aims to protect the function of the stuffing box and keep the stuffing box far away from the low temperature, Ensure the sealing effect of packing. The medium of pneumatic cryogenic butterfly valve is usually liquid helium, liquid hydrogen, liquefied natural gas, liquid nitrogen, liquid oxygen and other cryogenic fluids.
Structure Diagram of Pneumatic Low Temperature Butterfly Valve
Features of pneumatic low-temperature butterfly valve:
 
The material of pressure bearing parts of pneumatic cryogenic butterfly valve can withstand the expansion and contraction caused by the change of medium temperature, and the structure of sealing parts will not produce permanent deformation when the temperature changes. The extended upper valve cover adopts double sealing of joint valve shaft, which ensures the long-term stability of sealing packing at low temperature, so it is widely used in the control of cryogenic fluid processes such as LNG and air separation industries.

technical parameter

Nominal diameter DN50～DN500(MM)
Nominal pressure PN0.6、1.0、1.6MPa
Connection mode Wafer type, flange
Drive type Pneumatic control (air driven, Compressed air 4~7bar ）
Applicable temperature -40℃～196℃
body material CF8、CF8M、CF3M
Sealing material PEFE、PPL、304、316
Valve cover type Standard one-piece

Optional accessories of pneumatic cryogenic butterfly valve:
Driving method Compressed air (with handwheel)
Air supply pressure 0.4-0.7mpa
air connection G1/4"、G1/8"、G3/8"、G1/2"
ambient temperature -30～+70℃
Form of action
Single action (spring return): air close type (B) - valve position open (FO) in case of air loss; Air to open type (K) -- valve position closed in case of loss of air (FC)
Double action (ventilation switch): air close type (B) - valve remains unchanged in case of loss of air (FL); Air to open type (K) -- valve remains unchanged in case of loss of air (FL)
Optional Accessories 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.