A28H Type Fully Open Safety Valve with Handle SpringDetailed product description：

The A28H type with handle spring fully open safety valve is suitable for equipment or pipelines with working temperature ≤ 200 ℃ for media such as air, steam, water, nitrogen hydrogen mixture, etc. The A28Y-P/10R8 type is suitable for equipment or pipelines with working temperature ≤ 200 ℃ and corrosive media as an overpressure protection device.

Main component materials

A28H/Y with handle type part name	A28H material	A28Y-P material	A28Y-R8 material
valve body	HT200	ZG1Cr18Ni9Ti	CF8M
valve seat	thirty-five	ZG1Cr18Ni9Ti	CF8M
Adjustment Circle	2Cr13	1Cr18Ni9Ti	three hundred and sixteen
valve disc	2Cr13	1Cr18Ni9Ti	three hundred and sixteen
spring	50CrVA	50CrVA coated fluoroplastic	50CrVA coated fluoroplastic
valve stem	2Cr13	2Cr13	three hundred and sixteen
Adjust the screw	forty-five	2Cr13	three hundred and sixteen
protective cover	ZG200-400	ZG200-400	CF8M
Sealing surface material	Welding D507	Welding Co based Hard Alloy

External dimensions and connection dimensions

Nominal Diameter	A28H/Y with handle type 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