User manual

1
Instructions for Use
General
12/36 Variable Leak Valve User Manual / 87-400-085-01 (D)
Variable Leak Valve Specifications
Tab. 1
Minimum leak rate
1 x 10
-9
Torr-litres/sec. in normal operation;
1 x 10
-10
Torr-litres/sec. with condensable vapours
eliminated from leak gas
Rate of change of
leak
The valve provides an increasing rate of change as
the size of the leak increases giving precise control
in proportion to the size of the leak
Vacuum range
From atmospheric pressure to below 10
-11
Torr
Temperature range
Up to 450 C in either open or closed position
Inlet gas pressure
500 psi maximum
Gasket life
For unbaked systems, approximately 300
closures;
For baked systems, 20 to 30 closures
Gasket assemblies are replaceable
Material 300 series stainless steel; sapphire; OFHC copper
and copper alloy
Weight
1.8 Kg (4 lbs)