feedback
Enter marine-related query and AI bot will look for best match in our DB.
 

Back pressure which does not change under any condition of operation whether the pressure relief valve is closed or open.



Related Terms

DIFFERENTIAL SET PRESSURE

he pressure differential, between the set pressure and the constant superimposed back pressure. It is applicable only when a conventional type pressure relief valve is being used in service against constant superimposed back pressure.

SET PRESSURE

Maximum pressure controlled by relief valve. At this pressure relief valve starts releasing a pressure.

LIFTING DEVICE

A device to manually open a pressure relief valve by decreasing the spring loading in order to determine if the valve is in working order.

EFFECTIVE DISCHARGE AREA

A nominal or calculated area of flow through a pressure relief valve for use in flow formulas to determine valve capacity.

FLUTTER

The irregular alternating motion of the parts of a relief valve due to the application of pressure where no contact is made between the valve disk and the seat.

CLOSING PRESSURE

The amount of static inlet pressure in a safety relief valve when the valve disk has a zero lift above the seat.

COLD DIFFERENTIAL TEST PRESSURE

the inlet static pressure at which the pressure relief valve is adjusted to open on the test stand. This pressure includes the corrections for service conditions of back pressure or temperature or both.

CHATTER

  1. Prolonged undesirable opening and closing of electric contacts, as on a relay. Also known as contact chatter. 2. An irregular alternating motion of the parts of a relief valve due to the application of pressure where contact is made between the valve disk and the seat. 3. Vibration of a disk-recorder cutting stylus in a direction other than that in which it is driven.

TURBINE RELIEF VALVE

The turbine casing is fitted with spring-loaded relief valves to prevent damage by excessive steam pressure at the low-pressure end if the exhaust valve is closed accidentally. Some casings on smaller turbines are fitted with a sentinel valve, which serves only to warn the operator of over-pressure of the exhaust end. A spring-loaded relic valve is needed to relieve high pressure.

RELIEF VALVE

Also called pressure relief valve.

Related questions

MarineProHelp 2018 - 2020

First time here? Check out the FAQ!

If you've arrived to new location and wonder how to dress comfortably according to weather, check Comfiesto

×