56
VERSION 01/2021
ORDER NUMBER DOC2422004
TOPFINISH Bell 1S ECH
9.2
PRODUCT VALVES
Functional fault
Cause
Remedy
Product valve does not
open
– Product pressure too low
– Check and, if necessary, increase product
pressure (< 0.5 MPa; 5.0 bar; 73 psi).
– Air line pinched or damaged by
movement of the reciprocator
– Check air hose and replace if necessary.
– Functional fault of the product
valve caused by pollution with
product
– Replace product valve.
– O-rings in the area of the
thread are damaged.
– Replace O-rings.
– Product hose kinked or product
supply interrupted
– Check product hose and product supply.
– No compressed air available
– Check function of the valve according to
the circuit and pneumatic diagrams and
replace valve if necessary.
– Control function causes a
problem
– Check software and hardware of the
control cabinet.
– No release for supply and
exhaust air and therefore,
the control cabinet is locked
internally
– Activate release for supply and exhaust
air.
– Ventilation hole blocked
– Clean ventilation hole.
– Product valve (M) on valve
block closed
– Ensure product release.
– Product valve (M) has no
function. The function can
be restored by replacing the
product valve.
– Replace or repair the product valve.
Product valve does not
close
– Valve seat of the product valve
contaminated
– Clean the product valve.
– O-ring at the thread of the
valve is damaged
– Replace O-rings.
– Valve needle is stuck
– Replace product valve.
– Control function causes a
problem
– Check software and hardware of the
control cabinet.
Product valve responds too
slowly
– Check cable length.
– Shorten cable or install ex-protected
valves.
– If necessary, install quick exhaust valves
to improve the closing of the valves.
Product or solvent
escaping from opening on
product valve
– Packing in product valve
leaking
– Replace product valve.
