Ø .375" High Pressure PRI


    The Lee Company's new 375 High Pressure PRI is a relief valve designed for optimal performance in applications with high backpressure. This new relief valve has shown stable relief flow performance in applications with backpressures up to 850 psig. It features a durable tungsten carbide ball with the remaining components constructed entirely of stainless steel.

    Available in forward and reverse relief flow directions, the 375 High Pressure PRI offers a range of cracking pressures for 3000, 4000 and 5000 psi systems with system peak pressures up to 6750 psi.
    • Designed for system pressures up to 5000 psi
    • Durable tungsten carbide ball and 440C CRES seat
    • Weighs only 20 grams
    • 100% tested and inspected


Pin and Insert




Relief Flow Forward





Relief Flow Reverse






Installation Hole




PERFORMANCE
  • Leakage at Minimum Cracking Pressure: 2 mL/min. max.
  • Leakage at Minimum Shutoff Pressure: 2 mL/min. max.
  • Restriction at Minimum Recommended Valve Lift: 1500 Lohms
  • Nominal System Pressure: 5000 psi max.
  • System Peak Pressure: 6750 psi max.
  • Nominal Weight: 20 grams
(Valve performance on MIL-PRF-83282 at 85 °F)

MATERIALS
PART
MATERIAL
SPECIFICATION
Body
304 CRES
AMS 5639
Pin
17-4PH CRES
AMS 5643
Poppet
304 CRES
AMS 5639
Seat
440C CRES
AMS 5630
Spring
17-7PH CRES
AMS 5678
Ball
Tungsten Carbide
-
Retainer
15-5PH CRES
AMS 5659
Tube
13-8 MO CRES
AMS 5629
Orifice Plate
304 CRES
AMS 5639
Shim
17-7PH CRES
AMS 5529
Finish: All CRES Parts Passivated
Pins are prewaxed. Do not degrease. Do not lubricate.

INSTALLATION AND EXTRACTION
Tool Set Part Number is CUTA3750514C
Replacement Pin Part Number is PHRA3750003A
For Installation and Extraction Procedures, Tools and Oversize Spare Parts, follow this link

LEE PART NUMBER
MINIMUM CRACKING PRESSURE (PSID)
FLOW POINT
MINIMUM SHUTOFF PRESSURE (PSID)
FORWARD
REVERSE
LOHM RATE
MIN. FLOW (GPM)
AT
(PSID)
PHFA3751300D
PHRA3751300D
3000
400
3.7
3850
2850
PHFA3751320D
PHRA3751320D
3200
400
3.8
4050
3000
PHFA3751340D
PHRA3751340D
3400
400
3.9
4250
3200
PHFA3751420D
PHRA3751420D
4200
400
4.0
5250
4000
PHFA3751440D
PHRA3751440D
4400
400
4.1
5400
4200
PHFA3751520D
PHRA3751520D
5200
400
4.9
6550
5000
PHFA3751540D
PHRA3751540D
5400
400
5.0
6750
5200

Download a PDF file of the Product Data Sheet

For more information, please send us your application information via our ASK LEE service. Or contact our application engineers in the USA at 1-800-LEE-PLUG or our representatives around the world.
Copyright 07/2008 by The Lee Company, USA
-- Trademark information --
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