A28H/Y Fully open safety valve with handle springDetailed product description：

Product details:
A28H is suitable for equipment or pipelines containing air, steam, water, nitrogen hydrogen mixture and other media with a working temperature of ≤ 200 ℃. A28Y-P/10R8 is suitable for equipment or pipelines containing corrosive media with a working temperature of ≤ 200 ℃ as an overpressure protection device.

Main component materials

NO.	Part Name	A28H material	A28Y-P material	A28Y-R8 material
one	valve body	HT200	ZG1Cr18Ni9Ti	CF8M
two	valve seat	thirty-five	ZG1Cr18Ni9Ti	CF8M
three	Adjustment Circle	2Cr13	1Cr18Ni9Ti	three hundred and sixteen
four	valve disc	2Cr13	1Cr18Ni9Ti	three hundred and sixteen
five	spring	50CrVA	50CrVA coated fluoroplastic	50CrVA coated fluoroplastic
six	valve stem	2Cr13	2Cr13	three hundred and sixteen
seven	Adjust the screw	forty-five	2Cr13	three hundred and sixteen
eight	protective cover	ZG200-400	ZG200-400	CF8M
	Sealing surface material	Welding D507	Welding Co based Hard Alloy

External dimensions and connection dimensions

Nominal Diameter	Size
	do	Rc	G	L	L1	H
fifteen	ten	1/2"	3/4"	thirty-seven	sixty-two	one hundred and eighty-nine
twenty	twelve	3/4"	1"	forty	sixty-five	one hundred and ninety-six
twenty-five	fifteen	1"	11/4"	forty-five	seventy-two	two hundred and seventy-seven
thirty-two	twenty	11/4"	11/2"	fifty-five	eighty-five	three hundred and twelve
forty	twenty-five	11/2"	2"	sixty-seven	one hundred	three hundred and twenty-two
fifty	thirty-two	2"	21/2"	seventy-six	one hundred and twelve	three hundred and forty-eight
sixty-five	forty	21/2"	3"	one hundred and ten	one hundred and thirty-five	three hundred and seventy
eighty	sixty	3"	4"	one hundred and ten	one hundred and forty-five	four hundred and ten