Safety Valve Blow-Through; Visual Test Of The Safety Valve - Vetter LD 50/30 Operating Instructions Manual

Vetter Leak Sealers
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5.2

Safety valve blow-through

If a safety valve blows too early due to foreign body penetration,
open the blowing device (2) by turning counter-clockwise and
blow through.
If the foreign body is not removed by doing this, then the comple-
te upper part of the valve is to be unscrewed
9 To do this, place the pipe pliers at the height (1).
9 After unscrewing, carefully take out the valve ball and remove
the foreign body from the sealing plate.
9 Screw on the upper part of the valve again and check for per-
fect operation.
9 Changes to the set pressure must not be made.
9 If the seal on the upper part of the valve is removed then per-
fect function can no longer be guaranteed. The safety valve is
then to be sent back to the manufacturer.
9 With icing caused by high humidity and low temperatures, it
is possible to use a normal defrosting spray..
5.3

Visual test of the safety valve

Safety valves are sealed.
If the seal on the upper part of the valve is removed then
perfect function can no longer be guaranteed. The safe-
ty valve must be exchanged.
9 Seal exists and is undamaged.
Old safety valves had customs seals
New safety valves have seal plates