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Address：No. 4-4 East West Road, Jinhu County Industrial Concentration Zone, Huaian City, Jiangsu Province
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The relief valveaqf

Spring micro-open external thread safety valve

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Spring micro-open external threaded safety valve and A21H-C external threaded spring micro-open safe…

Description：

A, product introduction:
A21H series Spring weiqi External thread Safety valve A21H-C type external screw spring micro open type safety valve suitable for working temperature are less than 200 of the air, ammonia, oil gas and other media of the equipment or pipeline. A21W-P and R type temperature are less than 200 are suitable for corrosive gas or liquid equipment or pipeline, as the overpressure protection device. Type A21Y is suitable for temperature are less than 100 of the liquefied petroleum gas.

Two, spring Weiqi safety safety valve full thread valve full thread standard:

Design and manufacturing standards: GB/T 12243-2005;
The structure of standard length: GB/T 12221-2005;
Flange standard: GB/T 9113;
Pressure temperature rating: GB/T 12224-2005;
Test standards: GB/T 13927-2008.
Three, Spring weiqi External thread security Safety valve The main components of materials:

NO.	Part name	A21H-C/A21F material	A21W-P/A21F-P material	A21Y-R material
One	Pipe joint	Twenty	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
Two	Pipe joint nut	Thirty-five	2Cr13	1Cr18Ni9Ti
Three	valve seat	Thirty-five	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
Four	valve body	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
Five	Valve	2Cr13/2Cr13+PTFE	1Cr18Ni9Ti/1Cr18Ni9Ti+PTFE	1Cr18Ni12Mo2Ti
Six	Spring seat	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
Seven	Spring	50CrVA	50CrVA fluorine plastic coating	50CrVA fluorine plastic coating
Eight	Lock nut	Q235-A	ZG230-450	1Cr18Ni9Ti
Nine	Spring guide pad	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
Ten	The adjusting nut	Q235-A	2Cr13	1Cr18Ni12Mo2Ti
	Sealing surface material	"Y" type of Co based alloy hardfacing welding D507, "H", "W" type valve body

Four, spring micro open type safety valve thread dimensions and connection dimensions:

External thread safety valve spring

Model	Nominal diameter	Do	D	Do	M	D1	D1	L	L1	About H
AA21-16C A21H-16C A21H-40 A21W-16P A21W-40P KA21-16P	Fifteen	Twelve	Fifteen	Twenty	M27 * 1.5	G1/2"	Thirty	Thirty-five	Seventy-six	Sixty-six
	Twenty	Sixteen	Twenty	Twenty-five	M33 * 1.5	G3/4"	Thirty-five	Forty	Eighty-seven	Sixty-eight
	Twenty-five	Eighteen	Twenty-five	Thirty-one	M39 * 1.5	G1"	Forty	Fifty	One hundred	One hundred and five
A21Y-64 A21Y-64P A21Y-100 A21Y-100P	Fifteen	Ten	Fifteen	Twenty-five	M39 * 1.5	G1"	Forty-four	Fifty	One hundred	Sixty-six
	Twenty	Ten	Twenty	Thirty-one	M39 * 1.5	G1"	Forty-four	Fifty	One hundred	Sixty-eight
	Twenty-five	Twelve	Twenty-five	Thirty-one	M39 * 1.5	G1"	Forty-four	Fifty	One hundred	One hundred and five
A21W-160/160P	Fifteen	Eight	Twenty	/	M24 * 2	G1"	Forty-four	Fifty	One hundred	Two hundred and sixty-one
	Twenty	Eight	Twenty-five	/	M33 * 2	G1"	Forty-four	Fifty	One hundred	Two hundred and sixty-one
	Twenty-five	Eight	Twenty-eight	/	M36 * 2	G1"	Forty-four	Fifty	One hundred	Two hundred and eighty-five

Five, ordering:
1, the product name, specifications and types of the caliber of nominal pressure valve material and connect the working temperature to the transmission mode with the attachment so that we provide you the correct selection.
2, if the unit has been selected by the design model of our company, please press the product directly to our sales department order.
3, when using the place is very important or complicated when you try to provide design drawings and detailed parameters when the occasion is important or complicated when you try to provide design drawings and detailed parameters by Zhongwei control of our experts for you to review.

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