SER
VICING
57
PULSE Installation, Commissioning and Servicing Manual - Revision 19
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NOZZLES
2.1 Elaflex (Petrol/Diesel)
Most of the information below applies in principle to other Elaflex
nozzles which may be used with the PULSE range of dispensers.
Maintenance
The nozzle does not require any lubrication.
Regularly inspect the nozzle visually for damage. Pay attention that the spout serration
secures the nozzle in the filler neck.
Test the “minimum” shut off and the safety cut off function (3) during the annual pump
maintenance and replace in case of damage which may affect the vacuum.
Troubleshooting
NOZZLE FAILS TO OPEN:
The pump pressure may be too low to push
the valve poppet open. In hot weather dirt and gum deposits can
cause stickage at the valve seat (6). If the pump pressure cannot be
increased, disconnect the ZVA, remove the swivel, pull the lever to
the open position and push the valve stem to free the poppet (7).
NOZZLE DOES NOT CLOSE AUTOMATICALLY
: The vacuum required to
operate the automatic action is too low. With the pump running, fully
pull the lever (9) to check that full flow can be obtained. Also check,
if a loose spout, damaged vacuum cap (5) or clogged strainer (8) has
caused the pressure drop.
ZVA KEEPS TRIPPING OFF PERMANENTLY:
The air passage is blocked
(2). First check if it is caused by the ball of the safety cut-off by
shaking the nozzle. If the ball is free to move, it will rattle. To clear
the air passage blow compressed air up the spout until air comes out
of the sensing port (1).
poppet spindle
replacing strainer
Figure 26� Elaflex ZVA Slimline 2 Nozzle
Replacement O-Rings (Part No.
4G00062) may be ordered from Gallagher.
DELIVERY PRESSURE EXCEEDS 350kpa:
Excessive pressure will result in tripping out the
nozzle. Check and rectify.
Damage to the end
of spout can affect
nozzle operation.
