YFA72W series vacuum negative pressure safety valveDetailed product description：

The YFA72W safety valve is suitable for negative pressure systems with temperatures ≤ 200 ℃. When the negative pressure inside the container exceeds the allowable value, the YFA72W safety valve automatically opens and sucks in air; When the negative pressure inside the container reaches the allowable value, the YFA72W safety valve automatically closes to protect the equipment and system. Installed in a normal non negative pressure system, the YFA72W safety valve automatically opens when negative pressure is generated due to the unopened release valves of the container and system.

YFA72W vacuum negative pressure safety valve external dimensions and connection dimensions:

Nominal Diameter	Size
	D	D1	D2	Z-?d	b	f1	H
fifteen	ninety-five	sixty-five	forty-five	4-14	fourteen	two	one hundred and ten
twenty	one hundred and five	seventy-five	fifty-five	4-14	sixteen	two	one hundred and thirty
twenty-five	one hundred and fifteen	eighty-five	sixty-five	4-14	sixteen	two	one hundred and fifty
thirty-two	one hundred and forty	one hundred	seventy-eight	4-18	eighteen	two	one hundred and eighty
forty	one hundred and fifty	one hundred and ten	eighty-five	4-18	eighteen	three	two hundred
fifty	one hundred and sixty-five	one hundred and twenty-five	one hundred	4-18	twenty	three	two hundred and twenty-one
eighty	two hundred	one hundred and sixty	one hundred and thirty-five	4-18	twenty-two	three	two hundred and forty-five
one hundred	two hundred and twenty	one hundred and eighty	one hundred and fifty-five	8-18	twenty-two	three	two hundred and fifty-three
one hundred and twenty-five	two hundred and fifty	two hundred and ten	one hundred and eighty-five	8-18	twenty-four	three	two hundred and eighty
one hundred and fifty	two hundred and eighty-five	two hundred and forty	two hundred and ten	8-23	twenty-four	three	three hundred and twenty-nine
two hundred	three hundred and forty	two hundred and ninety-five	two hundred and sixty-five	8-23	twenty-six	three	three hundred and seventy-seven
two hundred and fifty	three hundred and ninety-five	three hundred and fifty	three hundred and twenty	12-23	twenty-eight	three	four hundred and forty

YFA72W Vacuum Negative Pressure Safety Valve Main Component Materials:

Operating Temperature	≤200℃
Applicable Medium	YFA72W-10P is suitable for nitric acid media
	YFA72W-10R is suitable for acetic acid media

NO.	Part Name	YFA72W-P material	YFA72W-R material
one	valve body	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
two	valve seat	1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
three	Adjustment Circle	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
four	valve cover	ZG1Cr18Ni9Ti	1Cr18Ni9Ti
five	valve stem	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
six	spring	50CrVA	50CrVA coated fluoroplastic

YFA72W series vacuum negative pressure safety valve