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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.
| Characteristic | Specification |
|---|---|
| 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 |
| PART | MATERIAL | SPECIFICATION |
|---|---|---|
| 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 |
This table below contains the part numbers and technical specifications for this product. If you have specific questions, need a quote, or would like to request a handbook or drawing, click the red request button in the column on the far right.
From plugs to solenoid valves, there’s a vast array of products that The Lee Company can offer. If you’d like to discuss the best solution for your specific application or to learn more about our capabilities, use-cases, or quality standards, contact your local Lee sales engineer.
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The Lee Company has developed the Lohm Laws for defining and measuring resistance to fluid flow. The Lohm is defined such that 1 Lohm will flow 100 GPM of water with a pressure drop of 25 psi at a temperature of 80°F.
Always verify flow calculations by experiment.
*There are many parameters to consider when determining V-Factor. Click here for more information.
