How to choose normal temperature valves and low temperature valves? What’s the difference?

[ad_1]

How to choose normal temperature valves and low temperature valves? What’s the difference?
There are many classifications of valves. Let’s learn about the difference between cryogenic valves and normal temperature valves today. Cryogenic valves are valves that can operate in low-temperature working systems. Usually, the operating temperature is lower than -40°C. They are mainly used in equipment such as liquefaction, separation, transportation and storage of gases. The operating temperature can be as low as -270°C. Currently there are gate valves, globe valves, check valves, ball valves, butterfly valves and throttle valves.
How to choose normal temperature valves and low temperature valves? What's the difference?
In recent years, ultra-low temperature valves have been used more and more widely. They are one of the indispensable important equipment in petrochemical, air separation, natural gas and other industries. The working medium is not only low in temperature, but most of them are either toxic or flammable and explosive. , and has strong permeability, so it determines many special requirements for valve materials and design. It is not only required to work normally at the set temperature, but also to ensure the working performance at room temperature.
Compared with normal temperature valves, low temperature valves have higher packing parts and longer valve stems. Its purpose is to reduce the heat introduced into the device from the outside; to ensure that the temperature of the stuffing box is above 0°C so that the stuffing can work normally; to prevent the valve stem at the stuffing box and the upper part of the valve cover from being overcooled due to the overcooling of the stuffing box. parts are frosted or frozen.
How to choose normal temperature valves and low temperature valves? What's the difference?
The design of the long-necked bonnet is mainly the design of the neck length L. L refers to the distance from the bottom of the stuffing box to the upper surface of the upper sealing seat, which is related to the thermal conductivity of the material, the thermal conductivity area, the surface heat dissipation coefficient, and the heat dissipation area. , the calculation is rather cumbersome, and it is generally obtained by experimental methods.
Ferritic stainless steel can be used when the temperature is higher than -100°C, austenitic stainless steel can be used when the temperature is lower than -100°C, copper alloy or aluminum alloy can be used for low-pressure and small-diameter valves, and the valve body should be able to fully withstand temperature changes. The expansion and contraction of the valve seat part will not cause permanent deformation due to temperature changes.
After reading the above content, do you know how to choose normal temperature valves and low temperature valves? What’s the difference? Collect it now~

[ad_2]

Share:

Send Us A Message

More Posts

Added to wishlistRemoved from wishlist 0
Add to compare
Metal Seated Lift Plug Valve manufacturer
Added to wishlistRemoved from wishlist 0
Add to compare
steam trap manufacturer
Added to wishlistRemoved from wishlist 0
Add to compare
Cast Steel Gate Valve-API
Added to wishlistRemoved from wishlist 0
Add to compare
Forged Steel Gate Valve
Added to wishlistRemoved from wishlist 0
Add to compare
Resilient Seat Gate Valve-DIN
Added to wishlistRemoved from wishlist 0
Add to compare
Resilient Seat Gate Valve-BS
Added to wishlistRemoved from wishlist 0
Add to compare
Resilient Seat Gate Valve-AWWA
Added to wishlistRemoved from wishlist 0
Add to compare
Resilient Seat Gate Valve-SOCKET
Added to wishlistRemoved from wishlist 0
Add to compare
Metal Seat Cast Iron Gate Valve-DIN
Added to wishlistRemoved from wishlist 0
Add to compare
Metal Seat Cast Iron Gate Valve-MSS
Added to wishlistRemoved from wishlist 0
Add to compare
Metal Seat Cast Iron Gate Valve-JIS
Added to wishlistRemoved from wishlist 0
Add to compare
Cast Steel Check Valve-DIN

LUCKY6S is Chinese leading manufacturer and supplier of industrial valves. which has over ten years of experience in manufacturing high-quality industrial valves, focuses on delivering safety, efficiency, and cost-effectiveness to every industry that requires automation. We are committed to supplying premium industrial valves and equipment to distributors, importers, and project managers worldwide. 

Top Valve Manufacturer

Newsletter

© 2018 All rights lucky6s

lucky6s-Best Valve manufacturer
Logo
Enable registration in settings - general
Compare items
  • Total (0)
Compare
0
Shopping cart