The VR valves are right angled general purpose UHV valves with a cycle usage minimum of 100,000 activations. The bonnet (top) seal of the valve is either welded (VR series) or demountable (VRD series). On the VRD series the whole movement mechanism can easily be removed and replaced.
Rotatable flanges are used on both valve axis allowing for complete valve alignment in any mounting situation.
All metal bonnet seals removable on VRD models
Viton® face seal
100,000 cycle service life
Rotatable CF flanges, Klein, ISO or unflanged port option
Bakeable to 200°C open or 150°C closed
Leak rate less than 10-10 mbar.l.s-1
Pressure range from 1x10-10 mbar to 4 bar
Bellows sealed actuation
|Viton® Valve Range-Manual (VR and VRD Series)|
|DN Type||OD||OD||Tube||Construction||A mm||C mm||D mm||Conductance litre/sec||Order Code|
|Flange mm||Flange inches||OD mm|
Spares and accessories - A full range of spares and accessories is available for this and existing valves.
To make a leak tight UHV seal between two conflat flanges, a gasket is required. Our gaskets are manufactured from quality controlled precision sheet material.
Leak valves are used to very accurately control the flow of gas into a vacuum system from an external source. They utilise the basic sealing principle of the all metal angle valve - namely a softer metal pad forced against a harder metal seat.