General information Product limitations
7
Definition of technical terms
Permissible working pressure which is dependant on materials, design and working temperatures/pressures.
PN
Nominal pressure
PMA
Maximum allowable pressure (bar)
That the shell of the product can withstand at a given temperature.
Which is given by the manufacturer. Sometimes restricted by the pressure limitations of internal mechanisms.
PMO
Maximum operating pressure (bar)
PO
Operating pressure (bar)
Measured at the product inlet.
POB
Operating backpressure
Measured at the outlet of the product.
PMOB Maximum operating backpressure (bar)
Maximum permissible pressure at the trap outlet allowing correct operation.
D PMX Maximum differential pressure (bar)
Maximum difference between operating pressure and operating backpressure.
D PMN Minimum differential pressure (bar)
Minimum difference between operating pressure and operating backpressure.
Maximum temperature to which the shell of the product can be raised permanently, at a given pressure.
TMA
Maximum allowable temperature ( °C)
TMO
Maximum operating temperature ( °C)
Maximum temperature for which the operation of the product is guaranteed.
TO
Operating temperature ( °C)
Temperature measured at the inlet of the product being tested.
This is a cold hydraulic test applied to the body only, with no internals fitted. Note: If, when the internals are fitted, the test pressure should be less, this figure should be clarified to the end user (see Typical pressure/temperature limits diagram below)
Designed for a maximum cold hydraulic test pressure of __ bar g
A standard layout for the Pressure/temperature limits information is shown on the next page.
7.4 3
11.4.4
TI-GCM-02 CM Issue 7
Page 3 of 4
Pressure / Temperature Limits
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