Single/Dual

• Single (331)
• Dual Assembly With Unions (274)
• Dual Assembly Without Unions (274)

Model Number

• 800 OP Series (47)
• 800 Series (51)
• 801 Series (48)
• 801DHC Series (48)
• 803 Series (51)
• 804 Series (48)
• 804R Series (48)
• 805 Series (48)
• 805R Series (48)
• 812 Series (48)
• 813 Series (48)
• 814 Series (48)
• 815 Series (48)
• 901/903 Series (52)
• CS5602A Series (48)
• CS5602B Series (48)
• CS5602C Series (48)
• CS5602R Series (48)
• Liquid Series (6)

Inlet Connection

• 1/2" (536)
• 3/4" (144)
• 1" (147)
• 1-1/4" (26)
• 1-1/2" (26)

Outlet Connection

• 3/4" (296)
• 1" (336)
• 1-1/4" (147)
• 1-1/2" (48)
• 2" (52)

Pressure Relief Setting

• Custom (57)
• 50 PSI (6)
• 75 PSI (53)
• 100 PSI (53)
• 125 PSI (51)
• 150 PSI (55)
• 175 PSI (55)
• 200 PSI (55)
• 225 PSI (55)
• 250 PSI (55)
• 275 PSI (55)
• 300 PSI (55)
• 325 PSI (55)
• 350 PSI (55)
• 375 PSI (55)
• 400 PSI (55)

Temperature Range

• (')-20°F to 275°F (819)
• -20°F to 275°F (54)

Valve Capacity

• 20.7 GPM (2)
• 25.9 GPM (1)
• 36.5 GPM (3)