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

The number of pounds per square inch of pressure drop in a boiler from the point where the safety valve pops to the point where the safety valve reseats.



Related Terms

CLOSE-OFF RATING

  1. The maximum allowable pressure drop to which a valve can be subjected at commercial shutoff. 2. The maximum allowable pressure drop between the outlet of a three-way valve and either of the two inlets, or between the inlet and either of the two outlets.

SAFETY-VALVE NOZZLE

A flanged nozzle by which a safety valve is connected to a boiler shell or drum.

POPPING PRESSURE

Pressure at which a safety valve opens.

MANUAL RESET SAFETY SHUTOFF VALVE

A manually opened, electronically latched, electrically operated safety shut-off valve designed to automatically shut off fuel when de-energized.

MUD OR LOWER DRUM

A pressure chamber of a drum or header type located at the lower extremity of a water- tube boiler convection bank which is normally provided with a blowoff valve for periodic blowing off of sediment collecting in the bottom of the drum.

DIFFUSION HYGROMETER

A hygrometer based upon the diffusion of water vapor through a porous membrane; essentially, it consists of a closed chamber having porous walls and containing a hygroscopic compound, whose absorption of water vapor causes a pressure drop within the chamber that is measured by a manometer.

BOILER AND PRESSURE VESSEL CODE

An ASME code, The Boiler and Pressure Vessel Code establishes rules of safety governing the design, fabrication, and inspection of boilers and pressure vessels, and nuclear power plant components during construction.

SAFETY-VALVE LIFTING LEVER

A lever by which safety valve may be lifted from its seat.

COMPRESSOR VALVE

A valve in a compressor, usually automatic, which operates by pressure difference (less than 5 pounds per square inch or 35 kilopascals) on the two sides of a movable, single-loaded member and which has no mechanical linkage with the moving parts of the compressor mechanism.

SAFETY VALVE

A valve that automatically opens when pressure attains the valve setting which is adjustable; used to prevent excessive pressure from building up.

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

×