Model Number

• 850/851 Series (78)
• 850R/851R Series (78)

Inlet Connection

• 3/4" (52)
• 1" (52)
• 1-1/4" (52)

Outlet Connection Style

• FNPT (156)

Pressure Relief Setting

• Custom (12)
• 150 PSI (12)
• 175 PSI (12)
• 200 PSI (12)
• 225 PSI (12)
• 250 PSI (12)
• 275 PSI (12)
• 300 PSI (12)
• 325 PSI (12)
• 350 PSI (12)
• 375 PSI (12)
• 400 PSI (12)

Valve Finish

• Anodized Aluminum (78)
• Ductile Iron (78)

Temperature Range

• (')-20°F to 275°F (144)
• -20°F to 275°F (12)

Brands

• Cyrus Shank (156)