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Variable Leak Valves

Precision Leak

All-metal ULV series precision ultrahigh vacuum leak valves are designed to control gas admission into high and ultrahigh vacuum systems. They are manually actuated via a cantilever arm fitted with extra-fine pitch threads for precise adjustment. They are ideally suited for handling hot and corrosive gases commonly used in demanding research environments. The valve body is constructed of type 304 stainless steel and a replaceable OFE copper seat. The valve poppet is made of high purity sapphire and is also replaceable. ULV series precision leak valves are shipped in a leak-tight condition. Leak rates are controlled by relieving the pressure applied to the replaceable copper seat. Leak rates are adjustable down to a minimum of 1x10-10 Torr l/sec.

 Standard Features
  • Adjustable leaks to 1x10-10 Torr l/sec
  • High temperature service to 450°C
  • Replaceable sapphire poppet
  • Replaceable OFE copper seat
  • Manual cantilever actuator
  • Stainless steel construction
  • Dry film lubricated actuator
  • Del-Seal™ CF ports
Variable Leak Valves - Precision Leak
 Flanges 304ss
 Valve Body / Seat 304ss / OFE Copper 
 Poppet  Sapphire
Bolts 300ss
Port Fastening
 Bolt Type Socket plated 12-point and socket head bolts
 Nut Type Hexagonal nuts
Leak Rate 1x10-10 Torr l/sec
Inlet Pressure 15 PSIG
Temperature Rating 450°C

 Variable Leak Valves - Precision Leak
For product listing, features and specifications click on links below
 Precision Leak