Installation & Use Of Bourdon Tube Pressure Gauges

1. Before fitting the gauge to a pressure source check that the maximum scale value of the gauge is higher than the pressure applied.  The applied pressure should be 75% of the max scale value for steady pressures or 65% of max scale value for fluctuating pressures.


2. Before fitting the gauge to a pressure source check that the wetted parts are compatible with the fluid being used, and that the pressure connection correctly matches that of the pipework.


3. When fitting the gauge to the pipework, use a correct sealing methods.  Do not use the gauge case to tighten the gauge to the pipework, use a correct size spanner on the neck of hexagon.


4. For gas applications ensure that a safety pattern gauge is used for pressures over 350 psi.


5. Gauges marked 'Hydraulic' must not be used on compressed gases.


6. Pressure Gauges with blow-out release at the back must be mounted at least 20mm away from a panel or wall to ensure safe dissipation of the confined pressure should the tube fracture.


7. Do not use gauge for oxygen or acetylene unless approved by ourselves.  Gauges must have 'Oxygen' or 'Acetylene' marked on the dial if used on these gases.


8. Do nut use glycerine filled gauges for any fluid which has strong oxidising agents, e.g. chlorine, hydrogen, peroxide etc.


9. If the pressure gauge is to be subject to vibration, pressure surges, pressure pulses or over pressure then seek advice from ourselves.


10. The ambient and process temperature acting on the gauge should be within -70^OF to + 180^OF and protected from higher fluid temperature by means of a syphon tube filled with condensate before use.  The fluid in the pressure chamber should not be allowed to freeze or crystallise as this will lead to rupture of the sensing element.


11. Should the pointer of any pressure gauge not return to zero, when the pressure is removed, it is an indication that damage to the gauge has occurred and the gauge should be replaced immediately.