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This valve combines the function of a reverse flow pressure relief valve in parallel with that of a check valve with free flow in the forward direction — all in one easy-to-install insert. The relief valve function features a rugged tungsten carbide ball and a 440C seat for durability and long life. The remaining components are constructed entirely of stainless steel. The 375 PRI/Check Valve is available in a range of seven different relief flow cracking pressures for system pressures up to 5000 psi.
| Characteristic | Specification |
|---|---|
| Relief Flow Direction: Leakage at Minimum Cracking Pressure |
2 mL/minute maximum |
| Relief Flow Direction: Leakage at Minimum Shutoff Pressure |
2 mL/minute maximum |
| Relief Flow Direction: Restriction at Min. Recommended Valve Lift |
1500 Lohms |
| Relief Flow Direction: Flow Point Lohm Rate |
400 Lohms |
| Free Flow Direction: Cracking Pressure |
5 ± 3 psid |
| Free Flow Direction: Lohm Rate at 25 psid and Greater |
220 Lohms maximum |
| Nominal System Pressure | up to 5000 psi |
| System Peak Pressure | 6750 psi maximum |
| Nominal Weight | 24 grams |
| PART | MATERIAL | SPECIFICATION |
|---|---|---|
| Shuttle Plate | 304 CRES | AMS 5639 |
| Seat | 440C CRES | AMS 5630 |
| Spring Seat | 15-5PH CRES | AMS 5659 |
| Springs | 17-7PH CRES | AMS 5678 |
| Retainer | 15-5PH CRES | AMS 5659 |
| Shim | 17-7PH CRES | AMS 5529 |
| Body | 304 CRES | AMS 5639 |
| Ball Follower | 304 CRES | AMS 5639 |
| Tube | 13-8 MO CRES | AMS 5629 |
| Ball | Tungsten Carbide | - |
| Orifice Plate | 304 CRES | AMS 5639 |
| Pin | 17-4PH CRES | AMS 5643 |
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.
| Part Number | Description |
|---|---|
| CUTA3750514C | Installation / Extraction Tool Set |
| PHRA3750003A | Replacement Pin |
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.
