Hydraulic pressure relief valve PRVA series

fluiddirect-operated

This direct-acting valve is ideally suited for hydraulic applications where a fast-opening safety relief valve is needed to prevent system damage from pressure spikes. This pressure relief valve is packaged in a Line Removable Unit (LRU) for ease of installation and extraction. Minimum cracking pressures are available from 400-3600 psid. An integral safety screen is available for added protection. - Safety Relief Valve - Diameter: 0.687 inches - Full Open Lohm Rate: 350 Lohms max - Nominal System Pressure: Up to 3000 psi - Cracking Pressure Range: 400 to 3600 psi General Performance - Leakage at Minimum Cracking Pressure: 1 mL / Minute Maximum - Leakage at Minimum Shutoff Pressure: 1 mL / Minute Maximum - Restriction at Minimum Recommended Valve Lift: 1500 Lohms - Nominal System Pressure: up to 3000 psi - System Proof Pressure: 4500 psi Maximum - Screen Hole Size: 0.008 inches Nominal - Nominal Weight: Unscreened: 38 grams, Screened: 39 grams - Test Fluid: MIL-PRF-83282 at 85°F Materials - Body: 303 CRES, QQ-S-763C - Spring Seat: 303 CRES, QQ-S-763C - Seat: 303 CRES, QQ-S-763C - Retainer: 303 CRES, QQ-S-763C - Ball Follower: 303 CRES, QQ-S-763C - Spring: 17-7PH CRES, AMS 5678 - Tube: 304 CRES, AMS 5639 - Ball: 440C CRES, AMS 5630 - Screen (Screened Version Only): 304L CRES, ASTM A 666 - Braze (Screened Version Only): AMS 4774 - Finish: All CRES parts passivated. Key Product Facts - Safety Relief Valve - Diameter: 0.687 inches - Full Open Lohm Rate: 350 Lohms max - Nominal System Pressure: Up to 3000 psi - Cracking Pressure Range: 400 to 3600 psi Part Numbers & Specifications - PRVA0687140D: Unscreened, 400 psid, 230 Lohms, 2 gpm, 500 psid, 340 psid - PRVA0687160D: Unscreened, 600 psid, 230 Lohms, 2.5 gpm, 750 psid, 510 psid - PRVA0687112H: Unscreened, 1200 psid, 230 Lohms, 3.6 gpm, 1500 psid, 1020 psid - PRVA0687116H: Unscreened, 1600 psid, 230 Lohms, 4.2 gpm, 2000 psid, 1360 psid - PRVA0687122H: Unscreened, 2200 psid, 230 Lohms, 5 gpm, 2750 psid, 1870 psid - PRVA0687126H: Unscreened, 2600 psid, 230 Lohms, 5.4 gpm, 3250 psid, 2210 psid - PRVA0687132H: Unscreened, 3200 psid, 280 Lohms, 4.8 gpm, 4000 psid, 2720 psid - PRVA0687136H: Unscreened, 3600 psid, 280 Lohms, 5.1 gpm, 4500 psid, 3060 psid - PRVA0687340D: Screened, 400 psid, 300 Lohms, 1.6 gpm, 500 psid, 340 psid - PRVA0687360D: Screened, 600 psid, 300 Lohms, 1.9 gpm, 750 psid, 510 psid - PRVA0687312H: Screened, 1200 psid, 300 Lohms, 2.7 gpm, 1500 psid, 1020 psid - PRVA0687316H: Screened, 1600 psid, 300 Lohms, 3.2 gpm, 2000 psid, 1360 psid - PRVA0687322H: Screened, 2200 psid, 300 Lohms, 3.7 gpm, 2750 psid, 1870 psid - PRVA0687326H: Screened, 2600 psid, 300 Lohms, 4 gpm, 3250 psid, 2210 psid - PRVA0687332H: Screened, 3200 psid, 350 Lohms, 3.8 gpm, 4000 psid, 2720 psid - PRVA0687336H: Screened, 3600 psid, 350 Lohms, 4.1 gpm, 4500 psid, 3060 psid Performance on MIL-PRF-83282 at 85°F - Finish: All CRES parts passivated. Additional Images - Flow Curve, Cross Section View, Dimensional View, Installation Hole Details available in the image gallery. For more technical details, refer to the Technical Hydraulic Handbook of Aerospace, Energy, and Motorsport Solutions (see PDF in documents). Technical Specifications - Direct-acting, fast-opening safety relief valve - Line Removable Unit (LRU) design - Cracking pressure: 400-3600 psid - Nominal system pressure: up to 3000 psi - System proof pressure: 4500 psi max - Diameter: 0.687 inches - Full open Lohm rate: 350 Lohms max - Integral safety screen available - Materials: 303 CRES, 17-7PH CRES, 304 CRES, 440C CRES, 304L CRES - Finish: All CRES parts passivated - Nominal weight: Unscreened 38g, Screened 39g - Test fluid: MIL-PRF-83282 at 85°F