PSV vs PRV
PSV vs PRV
Whats the principle difference between PSV (Pressure Safety Valve) and PRV (Pressure Relief Valve)...?
Re: PSV vs PRV
API definitions (from API RP520) of several types of valves:
a. A relief valve is a spring loaded pressure relief valve actuated by the static pressure upstream of the valve. The valve opens normally in proportion to the pressure increase over the opening pressure. A relief valve is used primarily with incompressible fluids.
b. A safety valve is a spring loaded pressure relief valve actuated by the static pressure upstream of the valve and characterized by rapid opening or pop action. A safety valve is normally used with compressible fluids.
c. A safety relief valve is a spring loaded pressure relief valve that may be used as either a safety or relief valve depending on the application.
d. A conventional pressure relief valve is a spring loaded pressure relief valve whose operational characteristics are directly affected by changes in the back pressure.
e. A balanced pressure relief valve is a spring loaded pressure relief valve that incorporates a bellows or other means for minimizing the effect of back pressure on the operational characteristics of the valve
f. A pilot operated pressure relief valve is a pressure relief valve in which the major relieving device or main valve is combined with and controlled by a self actuated auxiliary pressure relief valve (pilot).
In industry we don't really distinguish between PRV and PSV as it is common to use these terms interchangeably.
You may go to wikipedia for more understanding.
a. A relief valve is a spring loaded pressure relief valve actuated by the static pressure upstream of the valve. The valve opens normally in proportion to the pressure increase over the opening pressure. A relief valve is used primarily with incompressible fluids.
b. A safety valve is a spring loaded pressure relief valve actuated by the static pressure upstream of the valve and characterized by rapid opening or pop action. A safety valve is normally used with compressible fluids.
c. A safety relief valve is a spring loaded pressure relief valve that may be used as either a safety or relief valve depending on the application.
d. A conventional pressure relief valve is a spring loaded pressure relief valve whose operational characteristics are directly affected by changes in the back pressure.
e. A balanced pressure relief valve is a spring loaded pressure relief valve that incorporates a bellows or other means for minimizing the effect of back pressure on the operational characteristics of the valve
f. A pilot operated pressure relief valve is a pressure relief valve in which the major relieving device or main valve is combined with and controlled by a self actuated auxiliary pressure relief valve (pilot).
In industry we don't really distinguish between PRV and PSV as it is common to use these terms interchangeably.
You may go to wikipedia for more understanding.
Re: PSV vs PRV
Thank you.
Re: PSV vs PRV
You are welcome sir.
You are encouraged to float more & more queries. It'll help clarify a lot of things to all.
You are encouraged to float more & more queries. It'll help clarify a lot of things to all.
Re: PSV vs PRV
Kindly explain the sealing of valves between body and disc . in detail plz .?
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ashfaqanwer
- Site Admin
- Posts: 443
- Joined: 16 Mar 2010, 03:36
Re: PSV vs PRV
Novice,
It would be good if you initiate a new thread on your question and write in detail what exactly you want to know about sealing of disc and for which type of valve.
Hope you understand.
Thanks.
It would be good if you initiate a new thread on your question and write in detail what exactly you want to know about sealing of disc and for which type of valve.
Hope you understand.
Thanks.
Ashfaq Anwer
-PetroStreet.com
-PetroStreet.com