Single/Dual

• Single (50)
• Dual Assembly With Unions (51)
• Dual Assembly Without Unions (51)

Inlet Connection

• 1/2" (152)

Outlet Connection

• 3/4" (152)

Pressure Relief Setting

• Custom (9)
• 50 PSI (9)
• 75 PSI (9)
• 100 PSI (9)
• 125 PSI (9)
• 150 PSI (9)
• 175 PSI (9)
• 200 PSI (9)
• 225 PSI (9)
• 250 PSI (9)
• 275 PSI (9)
• 300 PSI (9)
• 325 PSI (9)
• 350 PSI (9)
• 375 PSI (9)
• 400 PSI (8)

Valve Finish

• Ductile Iron (51)
• Stainless Steel (101)

Temperature Range

• (')-20°F to 275°F (95)
• (')-400°F to 400°F (48)
• -20°F to 275°F (6)
• -400°F to 400°F (3)