CompAir UK Ltd
PUBLICATION APP070 PRESSURE GAUGES GENERAL
Page 1
app070.doc
PRESSURE GAUGES
GENERAL
The pressure gauge should be installed such as to avoid exposure to heat and vibration and to enable easy
observation of the dial indication.
IMPORTANT
It is common practise to install the pressure gauge without an isolating device, so to facilitate calibration or
replacement the system must be de pressurised before any work is carried out.
The pressure gauge is liquid filled to provide better damping from pulsation’s.
INSTALLATION & COMMISSIONING
The tightening and loosening of torque applied to the connection should be by means of the spanner flats
provided on the stem and should not be by means of grasping the case as this may damage the gauge.
No pressure higher than indicated by the working pressure symbol
▼
must be applied to the gauge during
hydrostatic pressure testing of the system. Otherwise the gauge must be isolated or removed during this
operation.
No attempt should be made to remove a pressurised gauge. The pressure system must be totally relieved if
the gauge can not be isolated otherwise.
The remainder of the pressure medium contained in the element may be hazardous or toxic. This should be
considered when handling and storing the removed pressure gauge.
PRESSURE GAUGES IN SERVICE.
Always open isolating devices always gently and never abruptly, as this may generate sudden pressure
surges that may damage the gauge.
The maximum working pressure for which the gauge is suitable, or also the minimum working pressure in
cases of vacuum, is indicated on the dial by corresponding marks
▼
. Fluctuating pressure always reduces
the maximum working pressure of the gauge.
Correct zeroing may be inspected by closing the isolating valve and relieving the gauge from pressure. The
pointer must fall within the thickened portion of the zero mark. Unless the gauge temperature is considerably
higher or lower than 20°C, a pointer not returning to zero may indicate serious damage to the gauge.
On-site testing of the pressure gauge is feasible by means of special isolating devices enabling connection of
a test gauge together with a suitable pressure source.
Summary of Contents for 5280D.1.IAC
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Page 44: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 38 1440 doc CRANKCASE 1...
Page 46: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 40 1440 doc CRANKCASE 2...
Page 48: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 42 1440 doc CRANKCASE 3...
Page 50: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 44 1440 doc CYLINDER 1st STAGE...
Page 52: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 46 1440 doc SUCTION VALVE COVER...
Page 60: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 54 1440 doc CROSSHEAD 1st STAGE...
Page 62: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 56 1440 doc PISTON 1st STAGE...
Page 64: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 58 1440 doc GLAND 1st STAGE...
Page 66: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 60 1440 doc OIL PUMP...
Page 68: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 62 1440 doc OIL PUMP FILTER...
Page 70: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 64 1440 doc INTERCOOLER...
Page 72: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 66 1440 doc 1st STAGE PIPE WORK...
Page 74: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 68 1440 doc...
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Page 120: ...CompAir UK Ltd APP 004 ANTI VIBRATION MOUNTS Page 2 app004 doc...
Page 122: ...CompAir UK Ltd PUBLICATION APP070 PRESSURE GAUGES GENERAL Page 2 app070 doc...
Page 128: ...CompAir UK Ltd PUBLICATION APP 138 3 WAY SOLENOID VALVES PS2197 Page 2 app138 doc...
Page 130: ...CompAir UK PUBLICATION APP034 ELECTRIC MOTOR MAINTENANCE GENERAL Page 2 APP034 doc...
Page 133: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 74 1440 doc...