Pressure Relief Valves from Griffco

Sizes, Flow Capacities & Pressure Ratings
Series Size Maximum Flow Maximum Pressure
Pulsating Continuous
Inch Metric GPH LPH GPM LPM PSI BAR
M-Series 1/4″ DN 8 100 375 5 19 350 24
3/8″ DN 10 200 757 10 37 350 24
1/2″ DN 15 260 984 15 57 350 24
Unibody 1/2″ DN 15 260 984 15 57 150 10
3/4″ DN 20 300 1,135 21 80 150 10
1″ DN 25 500 1,890 26 98 150 10
G-Series 1/2″ DN 15 300 1,135 21 80 350 24
3/4″ DN 20 300 1,135 21 80 350 24
1″ DN 25 500 1,890 26 98 350 24
1-1/2″ DN 40 1,200 4,542 63 238 250 17
2″ DN 50 2,350 8,892 120 473 250 17
3″ DN 80 5,200 19,600 270 1,020 250 17
4″ DN 100 5,200 19,600 270 1,020 250 17
High-Flow 1/2″ DN 15 600 2,271 30 114 250 17
3/4″ DN 20 600 2,271 30 114 250 17
1″ DN 25 1,000 3,785 54 204 250 17
High-Pressure 1/4″ DN 8 700 2,650 35 132 2000 138
3/8″ DN 10 700 2,650 35 132 2000 138
1/2″ DN 15 700 2,650 35 132 2000 138
3/4″ DN 20 1,200 4,542 60 227 2000 138
1″ DN 25 1,200 4,542 60 227 2000 138