Pneumatic cryogenic ball 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 cryogenic ball valve

  • [Valve model]: DQ641F,DQ641H
  • [Diameter specification]: DN15～DN250mm
  • [Structure]: Through cast valve
  • [Valve body material]: stainless steel
  • [Nominal pressure]: PN10、PN16、PN25
  • [Applicable temperature]: -40℃～ -196℃
  • [Application Scope]: Low temperature and cryogenic medium
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  • Pneumatic cryogenic ball valve

Product features

Pneumatic cryogenic ball valve refers to the ball valve with medium temperature between - 40 ℃ and - 196 ℃, which is used for the management system of cryogenic and cryogenic medium. The valve has undergone special low temperature treatment to ensure the low temperature performance of the material. When operating under low temperature conditions, the valve will not leak due to deformation caused by temperature changes. The pneumatic cryogenic ball valve bonnet adopts a long neck structure, which aims to protect the function of the stuffing box, keep the stuffing box far away from the low temperature, and ensure the sealing effect of the packing. The neck length of the long neck can be selected according to the use temperature and the thickness of the cold insulation material.
Application of pneumatic cryogenic ball valve:
 
The pneumatic cryogenic ball valve is applicable to all kinds of pipelines. It is used to cut off or connect the medium in the pipeline. Different materials can be used for different temperatures and media. The minimum operating temperature is - 196 ℃. The medium used is usually liquid helium, liquid hydrogen, liquefied natural gas, liquid nitrogen, liquid oxygen and other cryogenic fluids.

technical parameter

Nominal diameter DN15～DN300(mm)
Nominal pressure 1.0、1.6、2.5MPa
Connection type Flange type
structural style Extension rod
Drive type Compressed air 4-7bar
Action range 0～90°
Valve core structure O-ring
body material stainless steel
sealing material PEFE、PPL、304、316
Using Media Low temperature fluids such as liquefied natural gas and liquid nitrogen
control mode Switch type (fast two position cut-off), regulating type (valve positioner 4~20mA signal)

Optional functions of pneumatic cryogenic 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 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.