Thermal pressure relief valve PHTA series

direct-operated

This direct-acting valve has been optimized to relieve small flows caused by thermal expansion of a trapped volume of high pressure fluid. Minimum cracking pressures are available from 3500-5800 psid. This valve includes a 10 micron filter. - High Pressure Thermal Relief Valve - Diameter: 0.250 inches - Full Open Lohm Rate: 136,000 Lohms max - Nominal System Pressure: Up to 5000 psi - Cracking Pressure Range: 3500 to 5800 psi General Performance - Leakage at Minimum Cracking Pressure: 3 Drops / Minute Maximum - Leakage at Shutoff: 3 Drops / Minute Maximum (after a 2 minute wait) - Integral Filtration: 10 micron Nominal - Nominal System Pressure: up to 5000 psi - System Peak Pressure: 7500 psi Maximum - Nominal Weight: 4.5 grams - Test Fluid: MIL-PRF-83282 at 85°F Materials - Body: 304 CRES (AMS 5639) - Pin: 17-4PH CRES (AMS 5678) - Seat: 440C CRES (AMS 5630) - Ball: Tungsten Carbide - Spring Seat: 303 CRES (QQ-S-763C) - Tube: 304 CRES (AMS 5639) - Ball Follower: 303 CRES (QQ-S-763C) - Spring: 17-7PH CRES (AMS 5678) - Filter: 316 CRES Finish: All CRES parts passivated. Pins are prewaxed. Do not degrease. Do not lubricate. Part Numbers & Specifications - PHTA2501350D: Minimum Cracking Pressure 3500 psid, Flow Point Lohm Rate 105,000, Minimum Flow 50 mL/minute at 4050 psid, Minimum Shut-off Pressure 3200 psid - PHTA2501470D: Minimum Cracking Pressure 4700 psid, Flow Point Lohm Rate 122,000, Minimum Flow 50 mL/minute at 5300 psid, Minimum Shut-off Pressure 4200 psid - PHTA2501580D: Minimum Cracking Pressure 5800 psid, Flow Point Lohm Rate 136,000, Minimum Flow 50 mL/minute at 6650 psid, Minimum Shut-off Pressure 5200 psid Performance on MIL-PRF-83282 at 85°F Replacement Parts & Accessories - CUTA2500406C: Installation / Extraction Tool Set - CHFA2500003A: Replacement Pin - Flow Curve, Cross Section, Dimensional, and Installation Hole Details: See images in the gallery for reference views and dimensions (all dimensions in inches). Key Product Facts: High Pressure Thermal Relief Valve, Diameter: 0.250 inches, Full Open Lohm Rate: 136,000 Lohms max, Nominal System Pressure: Up to 5000 psi, Cracking Pressure Range: 3500 to 5800 psi. Technical Documentation: Refer to the Technical Hydraulic Handbook of Aerospace, Energy, and Motorsport Solutions (see PDF in documents section). Characteristics / Technical Specifications: - Direct-acting valve for thermal expansion relief - Minimum cracking pressure: 3500-5800 psid - Includes 10 micron filter - Nominal system pressure: up to 5000 psi - System peak pressure: 7500 psi max - Nominal weight: 4.5 grams - Test fluid: MIL-PRF-83282 at 85°F - Body: 304 CRES (AMS 5639) - Pin: 17-4PH CRES (AMS 5678) - Seat: 440C CRES (AMS 5630) - Ball: Tungsten Carbide - Spring Seat: 303 CRES (QQ-S-763C) - Tube: 304 CRES (AMS 5639) - Ball Follower: 303 CRES (QQ-S-763C) - Spring: 17-7PH CRES (AMS 5678) - Filter: 316 CRES