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UHV Series

All-metal MLV series leak valves are specifically designed to control gas admission into ultrahigh vacuum systems.They are manually actuated and ideally suited for handling hot or corrosive gases commonly used in demanding research environments. The valve body is constructed of type 304 stainless steel and fitted with a knife-edge seat made of a durable stellite superalloy. MDC ultrahigh vacuum leak valves are shipped in a leak-tight condition. Valve leak rates can be adjusted down to a minimum leak of I x I 0^-7 mbar I/ sec. Leak rate is controlled by relieving the pressure applied to a replaceable nickel diaphragm. Although these valves can be fully closed and rendered leak tight, doing so repeatedly will reduce the life of the nickel diaphragm and require periodic replacement.

  • Adjustable leaks to I x10·7 m bar I/ sec
  • High-temperature service to 450°C
  • Durable stellite superalloy seat
  • Replaceable nickel diaphragm seal
  • Manual actuator
  • Stainless steel construction
  • Dry film lubricated actuator
  • CF ports

UHV Series

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 Flanges 304ss
 Valve Body / Seat 304ss / Stellite
 Bolts  300 ss
 Gasket, Poppet and Bonnet Nickel
Port Fastening
 Bolt Type Socket head
 Nut Type Hexagonal nuts
Leak Rate 1x10-3 to 7.5x10-8 Torr l/sec
Inlet Pressure <= 1 bar maximum
Temperature Rating 450ºC
Weight 0.5 kg
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