User manual

Instructions for Use
If Valve Will not Close Leak-Tight
1
Variable Leak Valve User Manual / 87-400-085-01 (D) 23/36
CAUTION!
Do not use compressed air to blow out the valve. The possible high content of
particles, water vapour, and oil will contaminate the valve. Re-cleaning and
possible gasket replacement may then be required.
Inspect and Clean Gasket Assembly
a Inspect the copper alloy gasket to be sure that it is clean, smooth,
free of oxide, and protrudes above the surface of the gasket collar
by at least 0.002 inch. A hand lens or microscope will facilitate
inspection of the surface.
b If the top surface of the gasket is scored, scratched, or nicked, the
gasket assembly must be replaced.
c If the copper portion of the assembly does not protrude at least
0.002 inch above the collar, the gasket assembly must be
replaced.
d Oily films or other residue should be removed using acetone.
e Oxide or other slight surface imperfections can generally be
removed by polishing with a very fine rouge paper. When
polishing, rotate the gasket assembly about its centre axis to
avoid leaving scratches that cross the sealing surface. Clean the
gasket with acetone after polishing.
f Keep the gasket free of contamination while awaiting reassembly.
Re-Install Sapphire Assembly
a Hold the sapphire removal tool upright and attach the sapphire
assembly to the tool engaging the four slots. Be certain that the
tool is clean.
b With the valve in the upside down position, carefully insert the
tool and sapphire into the valve. Turn the tool clockwise to
engage the threads. Only light finger pressure is required to
tighten the assembly into the valve properly.