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Home > Products > Relief valve > Micro open type external thread safety valveA21

Description Material Performance Product Size Specifications

A21 is the spring Weiqi safety valve thread.
Type A21H is suitable for the work temperature are less than 200 of the air, ammonia, oil gas and other media equipment and pipeline.
Type A21W is suitable for equipment and Road gas or liquid for working temperature is not higher than 200 DEG with corrosive on.
Type A21F is suitable for the work temperature are less than 200 of the liquefied gas, gas pipeline and other equipment. As overpressure protection device

NO.	Part name	A21H-C/A42FMaterialScience	A21W-P/A21F-PMaterial Science	A21Y-RMaterial Science
1	Pipe joint	20	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
2	Pipe joint nut	35	2Cr13	1Cr18Ni9Ti
3	valve seat	35	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
4	valve body	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
5	Valve	2Cr13/2Cr13+PTFE	1Cr18Ni9Ti/1Cr18Ni9Ti+PTFE	1Cr18Ni12Mo2Ti
6	Spring seat	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
7	Spring	50CrVA	50CrVACoated fluorine plastics	50CrVACoated fluorine plastics
8	Lock nut	Q235-A	ZG230-450	1Cr18Ni9Ti
9	Spring guide pad	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
10	Adjusting nut	Q235-A	2Cr13	1Cr18Ni12Mo2Ti
	Sealing surface material	"Y" type surfacing Co base cemented carbide "H" type surfacing D507, "W" type for valve body

Body structure: closed; the valve opening height: Weiqi; structure: spring type; main material: stainless steel; suitable temperature: 200; pressure range: 1.6-10.0Mpa; medium: air, steam, water, nitrogen and hydrogen mixed gas; nominal diameter: 15-80 (mm); connection form: thread Product Name:; micro and safety valve with a wrench spring; applicable scope: national defense, scientific research, aerospace, electronics, machinery, metallurgy, petroleum, chemical, energy, environmental protection, bio medicine, refrigeration, food etc.

型號	公稱通經(jīng) (DN)	do	d	Do	M	d1	D1	L	L1	~H
A21H/W/F-16C/P/R A21H/W/F-25C/P/R A21H/W/F-40C/P/R	15	12	15	20	M27X1.5	G1/2〃	30	35	81	66
	20	16	20	25	M33X1.5	G3/4〃	34	40	87	68
	25	18	25	31	M39X1.5	G1〃	44	52	100	105
A21Y/W-64C/P/R A21Y-100C/P/R	15	10	15	25	M39X1.5	G1〃	44	52	100	105
	20	10	20	31	M39X1.5	G1〃	44	52	100	105
	25	12	25	31	M39X1.5	G1〃	44	52	100	105

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