How model nos of check valves are made? Like H76X,H44H,HC44X…

Check valve, also known as one way valve, back pressure valve, non return valve, reverse flow valve,etc, belongs to an automatic valve. Check valve is one of the indispensable valve products in the pipeline systems. Its function is to prevent the back flow of the medium, check valve is a valve which opens and closes by itself through the flow of the medium. With the increasing of various check valve types, there are also plenty model nos for each different check valves. Today we are going to introduce you how those model nos for check valves are made, which can help us to have a clear and deep understanding about check valves. 

The model no of check valve mainly includes: 

① is for check valve,additional requirements for check valve: H is for check valve, Additional code: HH is for Micro-resist slow close check valve, BH is for thermal insulation check valve, HQ is for rolling ball type check valve; 

② is for end connect of check valve: 4 is for flange end check valve, 6 is for welded end connect check valve, 7 is for wafer type end connect check valve, 1 is for internal threaded end connect check valve, 9 is for grooved end connect check valve; 

③ the structure of check valve: 1 is for lifting type check valve, 2 is for vertical type check valve, 4 is for swing type check valve, 6 is for double door type check valve, 8 is for butterfly type check valve; 

④ the sealing of check valve: F is for PTFE sealing material, H is for stainless steel sealing, M is for Monel sealing, X is for rubber sealing, Y is for hard alloy sealing, W is for body material sealing; 

⑤ the nominal pressure of check valve: 16 is for nominal pressure is 16KGS, PN1.6-2.5Mpa, pound unit: 150LB-2500LB, JIS standard: 5K-63K. 

⑥ the material of check valve:Q is for ductile iron material, C is for carbon steel, P is for stainless steel 304, R is for stainless steel 316, A is for Titanium alloy, I is for chromium-molybdenum steel; 

Common used model nos for check valves: 

PTFE lined check valve: H41F46, H42F46, H44F46

Silencing check valve: HC41H, HC41X, HC41T, HC41X

Welded check valve: H61Y, H61H, H62Y, H62H, H64Y

Silent check valve: H42H, H42W, H42F, H42Y, H42X 

Lifting type check valve: H41H, H41W, H41F, H41X

Swing type check valve: H44H, H44W, H44Y, H44Y

Rolling ball type check valve: HQ41X,  HQ41H, HQ41W

Micro resist slow closing check valve: HH44H, HH46H, HH49H 

Rubber disc type check valve: HC44X, HC44H, HC44W

Wafer type lifting check valve: H71X, H71H, H71W, H71Y 

Wafer type disc check valve: H74H, H74I, H74M, H74X

Wafer type butterfly double door check valve: H76X, H76H, H76W, H76Y 

This article above is to introduce how the model nos for check valves are made, and what those model nos means, if you already have the model nos for those check valves you require, kindly send them to us, we can quote accordingly, if you don’t have those model nos for check valves, it also ok, send us your requirements about the check valves, we can offer you professional and proper advice about what kind of check valve is good for you.