当前位置: Home / Faq / Large air separation FAQ /

Pressure test and sealing test of valves in cold box of air separation unit

Pressure test and sealing test of valves in cold box of air separation unit
Jan 22, 2021
Author: DEAR AST

Pressure test before valve installation

 

1.In the warranty period, those withthe certificationand the sealing surface is intact can no longer conduct the strength test alone, but only the air tightness test can be taken before installation.

 

2.Within the warranty period, it has the certificate, and its sealing surface has defects such as corrosion and damage. After treatment, it must carry out the air tightness test.

 

3.Outside the warranty period, those with certificationand intact sealing surface shall be subject to air tightness test before installation.

 

4.For valves that need to be degreased and disassembled on site, air tightness test shall be conducted separately before installation.

 

5.The safety valve shall be sent to the local quality inspection department of the project for verification before the end of installation and commissioning.

DEAR Air Separation Solve YourPressure test and sealing test of valves in cold box of air separation unitYou can also learn about otherLarge air separation FAQ about DEAR Air Separation, and solve the problem for you.
Didn’t find the problem encountered?
Please contact live chat or email for quick help.
Related FAQ
More Related FAQ
Due to improper adjustment of seal gas pressure during operation, liquid oxygen pump can not pump liquid or leak.   From the quality point of view, when the sealing pressure is too high, there will be gas leakage into the pump through the labyrinth seal, resulting in the impeller with gas or even idling, resulting in liquid injection or pressure drop; when the air pressure before sealing is too low, there will be liquid oxygen leakage.   From the quantity point of view, when (p1-p3...
2025.07.22
What is the function of the distillation tower in an air separation unit?
2025.07.21
Need more information?
Contact us for more details about our air separation equipment, solutions and services.
Products
  • Large air separation
  • Small air separation
  • High purity nitrogen air separation
  • Liquefaction air separation
  • Complete air separation
  • Biogas purification
  • Air separation parts
Need more information?
Tel:+86-19837850537
© Kaifeng DEAR Air Separation Industry Co., Ltd.. All rights reserved.
Online
Inquiry
Email
Top