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Pneumatic low temperature ball valve

  • [valve model]: DQ641F,DQ641H
  • [diameter specification]: DN15~DN250mm
  • [structural form]: Through casting valve
  • [valve body material]: stainless steel
  • [nominal pressure]: PN10、PN16、PN25
  • [applicable temperature]: -40℃~ -196℃
  • [application scope]: Cryogenic and cryogenic media
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  •  Pneumatic low temperature ball valve

Product features

Pneumatic low temperature ball valve refers to the ball valve with medium temperature ranging from - 40 ℃ to - 196 ℃, which is used for the management system of low temperature and cryogenic medium. The valve is treated with special low temperature to ensure the low temperature performance of the material. When operating at low temperature, the valve will not leak due to deformation caused by temperature change. The valve cover of pneumatic low temperature ball valve adopts long neck structure, its purpose is to protect the function of stuffing box, make the stuffing box far away from low temperature, and ensure the sealing effect of packing. The neck length of the long neck can be selected according to the use temperature and the thickness of the cold insulation material.
Low temperature pneumatic ball valve applications:
 
The pneumatic low temperature ball valve is suitable for all kinds of pipelines. It is used to cut off or connect the medium in the pipeline. Different materials can be selected and applied to different temperatures and media respectively. The minimum working temperature is - 196 ℃. The medium used is usually liquid helium, liquid hydrogen, liquefied natural gas, liquid nitrogen, liquid oxygen and other low-temperature fluids.

technical parameter

Nominal diameter DN15~DN300(mm)
Nominal pressure 1.0、1.6、2.5MPa
Connection form Flange type
structural style Extension rod
Driving form Compressed air 4-7bar
Range of motion 0~90°
Valve core structure O-type spool
body material stainless steel
sealing material PEFE、PPL、304、316
Using media Liquefied natural gas, liquid nitrogen and other cryogenic fluids
control mode Switch type (fast two position cut-off), regulating type (valve positioner 4-20mA signal)

Optional functions of pneumatic low temperature ball 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 acting (spring return): air to close (b) - valve position open (FO) in case of gas loss; air open (k) - valve position close (FC) when losing air
Double acting (ventilation switch): air off (b) - valve unchanged in case of loss of air (FL); air open (k) - valve unchanged in case of loss of air (FL)
Optional Accessories 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. 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) For example, flange connection
(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. 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. Please make sure that the order is in time for you.
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.