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11.
SERIES 500 VALVE INSTRUCTIONS
INSTALLATION:
Pump maintenance should only be carried out by authorised qualified personnel with
appropriate metering pump and system maintenance experience.
The suction and discharge lines must be isolated and pipework de-pressurised and
drained of chemicals.
See diagram overleaf of recommended installation layout for pressure relief and back
pressure applications.
We recommend installation of a pulsation dampener between valve and pump for both
applications to provide smoother, more accurate valve operation and maximise valve
life.
CAUTION:
Do not over-tighten screwed connection.
Should leakage occur during operation, unfasten, flush to remove any residual
chemical and re-coat pipe fittings with suitable thread sealant such as PTFE tape
before connecting to prevent leakage.
ADJUSTMENT:
Valve operating pressure is controlled by the spring (8) and can be increased or
decreased by varying the spring preload.
At date of purchase, Acromet will adjust the valve to meet customer's requirements.
To alter or set operating pressure at site, it is necessary for a pressure gauge with
snubber to be installed in the line between the valve and the pump and with pump
operating:-
For Back Pressure:
to decrease pressure or screw in to increase pressure.
pressure is achieved, retighten locknut.
For Pressure Relief:
decrease pressure or screw in to increase pressure. When full flow through
valve at required relief pressure is achieved, retighten locknut.
MAINTENANCE:
The valve and its components should be inspected annually or when incorrect
operation is suspected.
Disassembly is relatively simple. Unfasten locknut and unscrew adjustment screw to
remove spring preload. Unfasten the three main bolts (3). These bolts hold the upper
and lower halves together. Separate body halves and remove internals.
Carefully inspect and clean all components.
replaced. Smear the outer surface of the plunger and the bore of the upper body with
grease to prevent plunger sticking in bore during operation.
Assembly procedure is reverse of disassembly.
After reinstalling, adjust valve operating pressure as previously described.
Acro-Smart Electronic Series
Unfasten locknut (5). Unscrew adjustment screw (4)
Unfasten locknut.
Unscrew adjustment screw to
Worn or damaged parts should be
January 2017
When required
Acro-Smart Electronic Series
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