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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.
Customer
Reviewed in Canada on February 20, 2025
I used this for less than one year on a solar shower tank. It has built-up deposits on the interior and it no longer works: I need to use a small screwdriver to pop it open when I need to refill the tank. I will replace it with a PVC ball valve; working it manually is easier than messing up with a screwdriver every time I need to work with it. For pressure control, I can adjust its max. on the compressor.
John
Reviewed in Canada on January 19, 2025
I’m using it for a compressed air pressure relief and it works very well for my application in particular. It’s quite suitable.
VADIM RYAZANOV
Reviewed in Canada on July 5, 2024
Using this for pressure fermenting my home brew. Might be a bit tricky to adjust to low values, but once in the sweet spot, just let it be.
laura vessey
Reviewed in Canada on July 14, 2023
This device is amazing you can not trust the dial numbers but in conjunction with a high quality gauge it is irrelevant. It works amazing with steam! I can only imagine it works even better with air or water!
Sandy Spurrell
Reviewed in Canada on April 17, 2022
Using this for brewing beer, I can say for sure that this holds pressure. Held about 2psi on my fermenter for several days after fermentation was completed the first time I used just to see if it would. My previous valve would always leak a small amount.
B Mistry
Reviewed in Canada on July 29, 2021
Bought this for a pressure pot for resin casting. Keeps losing pressure at any setting. Used proper Teflon thread tape to ensure a proper seal. Eventually did a soapy water test. The valve does not hold constant pressure. It leaks at the exit holes. Even cranked down to the highest setting, it leaks slowly verified by the soap bubbles. All other connection and seals on my pot were tight. Will be returning this unless the manufacturer has other suggestions.
John T.
Reviewed in Canada on July 30, 2020
Bought to replace the useless safety valve on my paint pot that I converted to a pressure pot for use with curing Epoxy resin. My only beef is that the applied pressure scale isn't even close to being accurate. Used a precision guage to set my relief pressure and it lifts consistently at the correct pressure. Could always make my own scale to stick on, but as I'll likely never adjust it from it's 50 psi setpoint, why....
Kurt S.
Reviewed in Canada on May 31, 2020
1 purchased 2 of these. 1 of them worked flawless. The other one not so great.The adjustment knob compared to the other valve was very stiff. And it didn’t hold pressure worth a f*ck. Either over shot or bled down to low.I was using this valve as a pressure relief in my spunding valve for beer fermentation.I travelled the adjuster knob threads all the way in and all the way out several times, In hopes it would loosen up the stiff knob. But to no avail.Product quality consistently is a concern.The ones that work, work! But I am certain there are a few rotten eggs in the bunch I am afraid to say.I would have given a 2.5 star rating based on only 50% of my items worked properly. But a 2.5 star rating isn’t possible to leave. So I gave it a 3 star.If you order this valve, be prepared for a gamble.I returned the item and received a refund. I may try ordering again in hopes not to receive the same crappy valve.
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