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This Control Devices CR25-100 pressure relief valve has a brass body, an adjustable relief pressure, a 1/4" male NPT threaded inlet connection, and a fluorocarbon O-ring. The valve's brass body, brass valve seat, and the stainless steel poppet resist corrosion and can be used in operating temperatures up to 250 degrees F. The valve can be adjusted to open between 0 and 100 psi using the micrometer-style nylon knob. This safety valve has an 6 standard cubic feet per minute (SCFM) flow rate and is suitable for low flow pressure relief applications such as in tankless air compressors.
Relief valves remove excess pressure or vacuum from a system. The valve openings allow fluids or gases to escape to decrease pressure, and then close once the valve reaches the reseating pressure limit. They also relieve excess vacuum by opening to release a gas into the system and then closing after it reaches its low-pressure limit. Some relief valves have an adjustment mechanism to set the pressure where the valve opens, making it suitable for various applications. Relief valves are rated according to the volume of liquid or gas that can flow through them and the material that the valve is constructed from must be suitable for the fluid or gas, which may be corrosive or at an extreme temperature, in which it operates. Relief valves are used in a variety of applications, such as air compressors, petrochemical and chemical manufacturing, natural gas processing, and power generation.
Control Devices manufactures valves and other flow control devices. The company, founded in 1963, is headquartered in Fenton, MO.
David
2025-07-21 17:19:10
This is a well built pressure relief with an easy to adjust pressure set point. The scale you see is only a sticker and is questionable at best, but if you have a nice pressure gauge, you can dial in your set point really well. Opening and closing is smooth and quiet with overall functionality being excellent.
Troy
2025-07-02 12:25:32
Great device to do pressure fermentation for high pressure lager beers
bherch
2025-06-09 13:24:05
Not very accurate. Had is set around 50 psi and is relieved pressure on the gauge at 15 psi. Additionally there is a sliver of plastic still stuck on the black dial and it makes reading the psi numbers very difficult. Plastic was not completely trimmed. Overall however a nice valve.
Steve S.
2025-05-10 18:28:47
I got this to add to my Viair 300 compressor which does not have any auto off switch. When changing tires, you need to be fairly quick about shutting it off at the pump or you risk burning it out. There are options to wire in a pressure switch or you can buy a pump with one built in. For a fraction of the price, I added this to a tee fitting and it works well to bleed off excess pressure without loading the pump. Time will tell, but so far so good.
2012CobraBlackHarley
2025-05-06 15:27:51
Very good product for what I am using it for.
LTF
2025-03-21 14:37:44
The simple design makes it easy to tune for your projects. I have ordered this vale multiple times for different projects.
Tacoma, WA
2025-02-03 17:33:00
I put together the spunding valve using this relief valve. It worked perfectly for this application. I had the fermenter at about 6 psi, and the keg pressure set to 4 psi using the valve and it held that pressure for the full 10 gallon transfer into 2 kegs. Don't worry about the comments saying the scale is in accurate, you don't need it. Just set your pressure by watching the gauge as shown in the photos.
Caitlin G
2025-01-18 17:09:05
I’m using this PRV as part of a pressure fermentation and spunding rig. For my use it works really well with one exception. It needs to be used with a pressure gauge since the gauge on the pressure adjustment is 10-15 psi off. 10 psi on the PRV is actually 15 psi on a gauge.
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