A27 series spring micro opening safety valveDetailed product description：

A27 spring micro opening safety valve: A27Y is suitable for equipment or pipelines with corrosive media working temperature ≤ 200 ℃, and A27H type is suitable for equipment or pipelines with water, air, steam and other media working temperature ≤ 200 ℃, as an overpressure protection device.

A27 Oxygen Safety Valve Dimensions and Connection Dimensions:

Nominal Diameter	Size
	do	Rc	L	L1	G	H
fifteen	ten	1/2"	forty	sixty-five	1/2"	one hundred and thirty-five
twenty	fifteen	3/4"	forty-five	seventy	3/4"	one hundred and forty
twenty-five	twenty	1"	forty-five	seventy-six	1"	one hundred and fifty-five
thirty-two	twenty-five	1 1/4"	fifty-five	eighty-five	1 1/4"	one hundred and seventy
forty	thirty-two	1 1/2"	fifty-five	eighty-five	1 1/2"	three hundred and ten
fifty	forty	2"	sixty-seven	one hundred	2"	three hundred and twenty-two
sixty-five	fifty	2 1/2"	seventy-six	one hundred and twelve	2 1/2"	three hundred and forty-four
eighty	sixty-five	3"	one hundred and ten	one hundred and thirty-five	3"	three hundred and ninety-five

Main component materials of A27 oxygen safety valve:

NO.	Part Name	A27H material	A27W-P material	A27W-R material
one	valve body	HT350	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
two	valve seat	thirty-five	ZG1Cr18Ni9Ti	ZG1Cr18Ni9Ti
three	Adjustment Circle	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
four	valve disc	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
five	spring	50CrVA	50CrVA coated fluoroplastic	50CrVA coated fluoroplastic
six	valve stem	2Cr13	2Cr13	1Cr18Ni9Ti
seven	Adjust the screw	forty-five	2Cr13	1Cr18Ni9Ti
eight	protective cover	ZG200-400	ZG200-400	1Cr18Ni9Ti
	Sealing surface material	Welding D507	Welding Co based Hard Alloy