Model Number

• SR1 (27)
• SR1R (14)
• SR2 (20)
• SRH1 (32)
• SRH2 (25)

Outlet Connection

• 3/4 in (73)
• 1 in (45)

Pressure Relief Setting

• 150PSI (9)
• 250PSI (12)
• 300PSI (9)
• 400PSI (10)
• 160PSI (2)
• 175PSI (8)
• 180PSI (6)
• 185PSI (2)
• 200PSI (10)
• 225PSI (8)
• 230PSI (4)
• 235PSI (2)
• 255PSI (2)
• 260PSI (2)
• 265PSI (2)
• 275PSI (10)
• 325PSI (6)
• 348PSI (2)
• 350PSI (10)
• 375PSI (2)

Single/Dual

• Dual (60)
• Single (58)

Brands

• Parker RS (118)