GU series vacuum (pressure) ball valveDetailed product description：

The GU series vacuum (pressure) ball valve is suitable for connecting or cutting off medium flow in vacuum systems. This valve is a straight through manual ball valve, sealed by a spherical surface, and can be used in both vacuum and low-pressure conditions, and can be installed at any position.
The applicable working medium is acidic or alkaline gas or liquid.

Main technical performance of GU series vacuum (pressure) ball valve

Scope of application (Pa)	Quick release flange (KF) 2x105~1.3x10-5 Loop flange 16x105~1.3x10-5
Valve leakage rate (Pa.L/S)	≤1.3x10-5
Medium temperature (℃)	Standard factory: -30 to+150 Special designation: -30 to+240
Installation location	arbitrary
Flange Standard	GB4982； GB/T6070

(Figure 1) Quick release flange (KF) connection and external dimensions (GB4982)

Model	Diameter (DN)	ΦD	ΦB	H	L	A
GU-16/KF	sixteen	thirty	seventeen point two	sixty-two	one hundred	one hundred and twenty
GU-25/KF	twenty-five	forty	twenty-six point two	seventy-five	one hundred and fourteen	one hundred and fifty
GU-40/KF	forty	fifty-five	forty-one point two	one hundred and fifteen	one hundred and sixty-five	two hundred
GU-50/KF	fifty	seventy-five	fifty-two point two	one hundred and twenty-five	one hundred and seventy-five	two hundred and twenty-one

(Figure 2) Loose flange connection and external dimensions (GB/T6070)

Model	Diameter (DN)	ΦD	ΦB	H	L	A	n-ΦC
GU-16	sixteen	sixty	forty-five	sixty-two	one hundred	one hundred and twenty	4-6.5
GU-25	twenty-five	seventy	fifty-five	seventy-five	one hundred and fourteen	one hundred and fifty
GU-32	thirty-two	ninety	seventy	ninety-three	one hundred and forty	one hundred and eighty	4-9
GU-40	forty	one hundred	eighty	one hundred and fifteen	one hundred and sixty-five	two hundred
GU-50	fifty	one hundred and ten	ninety	one hundred and twenty-five	one hundred and seventy-five	two hundred and twenty-one
GU-63	sixty-three	one hundred and thirty	one hundred and ten	one hundred and sixty-six	one hundred and eighty-six	two hundred and thirty
GU-80	eighty	one hundred and forty-five	one hundred and twenty-five	one hundred and seventy-five	one hundred and ninety-eight	two hundred and ninety	8-9
GU-100	one hundred	one hundred and sixty-five	one hundred and forty-five	one hundred and eighty-nine	two hundred and twenty	two hundred and sixty
GU-125	one hundred and twenty-five	two hundred	one hundred and seventy-five	two hundred and thirty-two	two hundred and sixty-six	three hundred and sixty	8-11
GU-150	one hundred and fifty	two hundred and twenty-five	two hundred	two hundred and fifty	two hundred and ninety-six	four hundred