GVC080, Pneumatic Operation, 10.00 Inch O/D CF Flange

The Edwards GV range of stainless steel bellows sealed gate valves are designed for applications requiring overall leak tightness and a minimum of hydrocarbon in the residual atmosphere. These superior quality valves offer high vacuum integrity coupled with maximum conductance.

The stainless steel valve bodies are vacuum brazed, a special process which includes a bakeout at 1100 °C. This eliminates any possibility of virtual leaks and ensures a product with low outgassing characteristics.
 
A laser welded stainless steel bellows effectively seals the actuator from the valve. The concept provides ease of servicing and allows the gate and linkage mechanism to be removed while the valve remains in situ.

• In situ removal of gate and linkage mechanism for easy servicing
• Virtual leaks eliminated due to vacuum brazed manufacture
• Electropolished finish inside and outside
• Compact design with high conductance
• Manual actuation
• Microswitch position indicator as standard on pneumatic version
• Reedswitch variants
• Long periods of use between maintenance
• Low vibration and shock
• Free choice of orientation

Pressure range	10-9 mbar to 1 bar (absolute)
	8 x 10-10 - 750 Torr
Leak rate	< 10- 9 mbar l s- 1
	8 x 10-10 Torr l s- 1
Maximum differential pressure on the valve plate	1 bar / 750 Torr in either direction
Maximum differential pressure on the valve plate at opening	20 mbar / 15 Torr
Position indicator switch, breaking capacity	24 V d.c., 5 A
Material of construction
Body, valve plate	AISI 304 stainless steel
Mechanism	AISI 304 stainless steel,
Bearings	Hardened high carbon chrome steel
Circlips	SS PH 15-7 Mo
Bellows	AM 350 stainless steel
Seals, valve plate	Fluoroelastomer
Bonnet
Metal sealed valves	OFHC
Other valves	Fluoroelastomer
Bakeout temperature
Valve body, valve open	150 °C (fluoroelastomer bonnet seal)
Valve body, valve open	250 °C (metal bonnet seal)
Valve closed	200 °C
Actuator, pneumatic	100 °C
Average life until first service*	100000 closures
Mounting position	Any orientation
Pneumatic operating pressure	4 - 5.5 bar / 60 - 80 psi
Flange bore	200 mm
	8 in
Conductance in high vacuum	15000 l s-1
Pneumatic valve minimum closing
and opening time at 5 bar.	2 s (close) 3 s (open)
Approx weight	34 kg

 
*           Dependent on the vacuum environment and the opening and closing speed.

Body Dimensions (mm)
A	B	C	ØD	E	F	G	H	K	L
285.8	254.5	85.1	75.9	93.5	76.2	353.4	114.6	175.6	200.2

Flange Dimensions (mm)
ØM	ØN	P	ØS	ØT*	V
252.2	203.2	24	231.9	M8	24.6