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All Metal Leak Valves

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Leak Valves Manual
The demountable all metal leak valve is manufactured from 300 series stainless steel to UHV standards, suitable for controlled admission of gases over a wide pressure range.

Fine control is achieve via the graduated thimble and lever. The lever, used as a reducing mechanism, gives controlled leak rates ranging to 10-11 mbar l/s-1. Simple rugged design has produced a reliable valve which can be fitted to vacuum systems with absolute confidence.

The all metal leak valve by virtue of its design withstands bakeout temperatures associated with UHV systems without detriment to preformance.
Specification VML All Metal Leak Valve
Pressure range 1000 to below 10-11 mbar
Operating temperature -20° to +200°C
Bakeout temperature 250°C Closed 450°C Open
Operating media Any gas compatible with SST 304 and OFHC Copper
Vacuum Seal Stainless Steel diaphragm
Construction materials SST 304, OFHC Copper (vacuum) Hardened tool steel (lever)
Operation Micrometer style screw for precise, repeatable operation
Terminations CF16 or CF35 conflat flanges
as standard, other flanges
to order 


Custom version including welded capillary inlets are available.