Maximum Allowable Inlet Pressure

Maximum Allowable Inlet Pressure

Glossary Right Side Image
A gauge
Other Versions
Maximum Allowable Suction Pressure; MASP
Classification
Pressure Term
Definition

The maximum allowable difference between the absolute pressure of the fluid at the inlet port and the absolute ambient pressure.
Calculating: Limited by the same factors as Maximum Allowable Working Pressure (MAWP).

Maximum allowable inlet pressure, also known as maximum allowable suction pressure (MASP), is the maximum allowable difference between the absolute pressure of the fluid at the inlet port and the absolute ambient pressure.

Maximum allowable inlet pressure can be established as the lowest pressure limit of the following 3 components:
1) Shaft Seal
2) Joint Seals
3) Port Connections

 

Image showing the pump and system components that are used to calculate the maximum allowable inlet pressure. The lowest pressure limit of these three locations will equal the MASP.

Knowing the maximum allowable inlet pressure is important so that the pump is operated safely. Exceeding the MASP can lead to damaging the pump or system.

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Related Terms
Cracking Pressure
Full Bypass Pressure
Hydrostatic Test Pressure
Maximum Allowable Casing Pressure
Maximum Allowable Working Pressure
Maximum Differential Pressure
Differential Pressure
Discharge Pressure
Inlet Pressure