Stainless steel pressure relief valve PSFA series

thermaldirect-operatedback pressure

This direct-acting valve is ideally suited for hydraulic applications where a safety relief valve with extremely low leakage is needed to seal the system when closed. The fast opening response helps the valve prevent system damage from pressure spikes. Minimum cracking pressures are available from 800-4700 psid. - Zero Leak Thermal Relief Valve - Diameter: 0.281 inches - Full Open Lohm Rate: 100,000 Lohms max - Nominal System Pressure: Up to 4000 psi - Cracking Pressure Range: 800 to 4700 psi General Performance - Leakage at Minimum Cracking Pressure: 0 Drops in a 1 Minute Test; 1 Drop / Hour Maximum - Leakage at Minimum Shutoff Pressure: 0 Drops in a 1 Minute Test; 1 Drop / Hour Maximum - Nominal System Pressure: 4000 psi Maximum - System Peak Pressure: 5400 psi Maximum - Screen Hole Size: 0.004 inches Nominal - Test Fluid: MIL-PRF-83282 at 85°F Materials - Body: 15-5PH CRES (AMS 5659) - Pin: 15-5PH CRES (AMS 5659) - Poppet: 440C CRES (AMS 5630) - Seal: POLYMER - Poppet Guide: 303 CRES (QQ-S-763C) - Retainers: 303 CRES (QQ-S-763C) - Spring Guide: 303 CRES (QQ-S-763C) - Spring Seat: 303 CRES (QQ-S-763C) - Spring: 17-7PH CRES (AMS 5678) - Screen: 304L CRES (ASTM A 666) - Braze: AMS 4774 Finish: All CRES parts passivated. Pins are prewaxed. Do not degrease. Do not lubricate. Replacement Parts & Accessories - CUTA2810114C: Installation / Extraction Tool Set - SHBA2810003A: Replacement Pin Key Product Facts - Zero Leak Thermal Relief Valve - Diameter: 0.281 inches - Full Open Lohm Rate: 100,000 Lohms max - Nominal System Pressure: Up to 4000 psi - Cracking Pressure Range: 800 to 4700 psi Part Numbers & Specifications - PSFA2813800L: Forward, 800 psid, 100,000 Lohms, 25 mL/min, 930 psid, 660 psid - PSFA2813130D: Forward, 1300 psid, 100,000 Lohms, 33 mL/min, 1500 psid, 1100 psid - PSFA2813250D: Forward, 2500 psid, 100,000 Lohms, 45 mL/min, 3000 psid, 2100 psid - PSFA2813350D: Forward, 3500 psid, 100,000 Lohms, 55 mL/min, 4050 psid, 3100 psid - PSFA2813470D: Forward, 4700 psid, 100,000 Lohms, 63 mL/min, 5400 psid, 4100 psid - PSRA2813800L: Reverse, 800 psid, 100,000 Lohms, 25 mL/min, 930 psid, 660 psid - PSRA2813130D: Reverse, 1300 psid, 100,000 Lohms, 33 mL/min, 1500 psid, 1100 psid - PSRA2813250D: Reverse, 2500 psid, 100,000 Lohms, 45 mL/min, 3000 psid, 2100 psid - PSRA2813350D: Reverse, 3500 psid, 100,000 Lohms, 55 mL/min, 4050 psid, 3100 psid - PSRA2813470D: Reverse, 4700 psid, 100,000 Lohms, 63 mL/min, 5400 psid, 4100 psid Performance on MIL-PRF-83282 at 85°F - Finish: All CRES parts passivated. - Pins are prewaxed. Do not degrease. Do not lubricate. Characteristics / Technical Specifications - Valve Type: Direct-acting, zero-leak thermal relief valve - Diameter: 0.281 inches - Full Open Lohm Rate: 100,000 Lohms max - Nominal System Pressure: Up to 4000 psi - Cracking Pressure Range: 800 to 4700 psi - System Peak Pressure: 5400 psi Maximum - Screen Hole Size: 0.004 inches Nominal - Test Fluid: MIL-PRF-83282 at 85°F - Body Material: 15-5PH CRES (AMS 5659) - Pin Material: 15-5PH CRES (AMS 5659) - Poppet Material: 440C CRES (AMS 5630) - Seal Material: POLYMER - Poppet Guide/Retainers/Spring Guide/Spring Seat: 303 CRES (QQ-S-763C) - Spring: 17-7PH CRES (AMS 5678) - Screen: 304L CRES (ASTM A 666) - Braze: AMS 4774