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Full copper strap wrench spring micro opening external thread safety valve A27W/A28W

Full copper strap wrench spring micro opening external thread safety valve A27W/A28W

This valve is suitable for equipment or pipelines with working temperatures ≤ 200 ℃ for media such as water, air, steam, etc; This valve is suitable for equipment or pipelines with corrosive media operating at temperatures ≤ 200 ℃, as an overpressure protection device.

Product drawing

Product drawing.png

Product dimensions

DN	do	R	G	L	L1	≈H
15	10	1/2″	3/4″	37	65	196
20	12	3/4″	1″	40	70	215
25	15	1″	1 1/4″	45	78	233
32	20	1 1/4″	1 1/2″	60	90	304
40	25	1 1/2″	2″	67	105	325
50	32	2″	2 1/2″	76	115	346
65	40	2 1/2″	3″	110	145	372

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

Part Name	material
Valve seat, valve body, valve disc, top plate, spring plate, locking nut	copper alloy
spring	50Cr VA
adjusting screw	A3

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