This looks to be plumbed as a pressure reducing/downstream surge control valve. The CRL pilot sensing line is coming from the CRD which is sensing downstream. The CRL would need to be sensing upstream pressure to be sustaining, essentially prioritizing the upstream pressure over downstream.
Regarding a pressure sustaining valve ....... What happens if the low side pulls a vacuum or downstream line empties? Is the pressure maintained? How does variation in pressure on the downstream effect the function of the valve?
Crl should be sensing upstream not downstream pressure so if pressure drops the crl closed the valve even though the crd wants to keep downstream pressure
nope. Not in this application. you are thinking of a upstream pressure sustaining/ downstream pressure reducing valve. This is only a PRV. The CRL is acting as a back up pressure reducing pilot.
I'm still sending students to view this, every year. I'm glad you posted it.
Cheers for uploading! And cheers to the lass, she's a good teacher!
Great thanks
This looks to be plumbed as a pressure reducing/downstream surge control valve. The CRL pilot sensing line is coming from the CRD which is sensing downstream. The CRL would need to be sensing upstream pressure to be sustaining, essentially prioritizing the upstream pressure over downstream.
Who is this instructor, she is good
the higher set valve is commonly known as a monitor or high pressure override pilot
pressure sustaining valve manual which 1/2'' valve opens
Thank you
Regarding a pressure sustaining valve ....... What happens if the low side pulls a vacuum or downstream line empties? Is the pressure maintained? How does variation in pressure on the downstream effect the function of the valve?
CRL sensing downstream their for whatever reason you get higher pressure other than what the CRD is set for the CRL will shut the valve
Crl should be sensing upstream not downstream pressure so if pressure drops the crl closed the valve even though the crd wants to keep downstream pressure
nope. Not in this application. you are thinking of a upstream pressure sustaining/ downstream pressure reducing valve. This is only a PRV. The CRL is acting as a back up pressure reducing pilot.
Muy bueno. Señora
Excellent...Thanks !
What is her name please or channel
I needs two Pressure sustaining valve, Diameter 300 mm, Pressure (0-10) Bar, Operating Pressure 6 Bar.
good
Good one thanks
Technique de votre confiance
👍🏻🤝🏻👏🏻👏🏻👏🏻🎁
Thanks, great video!
Thnks!!
Looks like a claval casting replica
yes
the tag also...tag is always on the inlet
Not always, it should but can depend if the valve was modified by an installer.
Surge shutdown not sustaining
Vanne de pression.....