Spring micro opening closed safety valve A21H

Product drawing

Product drawing.png

Product dimensions

Technical Documentation

1.execution standard：GB/T 12243-2021

2.Structural length standard：GB/T12221-2005

3.Flange Standard：GB/T9113.1-2000

4.Test Standard：GB/T13927-2022

Product Parts List

serial number	name	A21H-C/A21Fmaterial	A21W-P/A21F-Pmaterial	A21Y-Rmaterial
1	pipe joint	20	304	316
2	Pipe joint nut	35	20Cr13	304
3	valve seat	35	304	316
4	valve body	20Cr13	304	316
5	valve disc	20Cr13/2Cr13+PTFE	304/304+PTFE	316
6	spring seat	20Cr13	304	316
7	spring	50CrVA	50CrVACovering fluoroplastic	50CrVACovering fluoroplastic
8	lock nut	Q235-A	20Cr13	304
9	Spring guided pad	20Cr13	304	316
10	adjusting nut	Q235-A	20Cr13	316
11	sealing surface	Y-type cladding Co based hard alloy, H-type cladding D507, W-type for valve body

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