Kenosha Reuse Discussion Board > KENOSHA, WI
> Commercial
> Electrical
> New
> 10 caltherm copper/brass pressure relief valves, psi
10 caltherm copper/brass pressure relief valves, psi
These were acquired at a salvage freight sale recently. They were made by Caltherm, which apparently manufactures a wide variety of valves such as these. However there was no indication who or what they were originally designed for.
I figure the first thing anybody will ask is, "What is the cracking pressure?" After hastily assembling an elaborate testing device and blowing compressed air through them, I can conclusively proclaim, "I don't really know." That is to say, they do not exactly "crack" because they flow somewhat evenly at lower pressures. They do, however, open more noticeably at about 30 to 35 PSI. When the air was turned off, I couldn't tell they held any pressure at all. The pressure always dropped back to zero pretty quickly but I may have had a leak somewhere.
They fit perfectly inside a 5/8" SAE tube nut, and the end of a 5/8" male flare fitting will seat nicely against the brass portion of the valve (tube nut in pictures not included). You may have to use sealant if you want everything airtight, but the flare nut thing offers some nice possibilities for mounting these.
Diameter (above base ring): .632"
According to the manufacturer:
The CT14 Pressure Relief Valve is used where a normally closed by-pass port is required to allow flow under conditions of excessive pressure buildup.
Typical applications include any flow passage that can potentially become restricted. Flow may consist of air, fuel, coolant or oils. The Pressure Relief Valve allows by-pass flow only under conditions of this over-pressure, thus preventing the buildup of pressures that could cause damage to a cooler, radiator, hydraulic tubes, hoses, fittings, etc.
Anywhere in Canada or Mexico for $11.45
Anywhere in the World for $13.45
