Ideal for high flow rate vacuum pumps, the GZMS VCV101A Vacuum Relief Valve can handle the largest vacuum pumps we sell and restrict the amount of vacuum you are pulling to your chosen set point ranging from 5" to 20". This model utilizes 1/2" NPT Pipe Thread for installation into your vacuum line plumbing.
You can adjust the vacuum relief set point by screwing the top cap up and down the body. The adjustment is secured by the knurled knob at the bottom of the valve which locks the adjustment in place.
