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Pressure Relief Valves

4.5 mm Press-In Pressure Relief Valve

This cartridge safety pressure relief valve offers superior flow capacity for its size. It is designed specifically for installation into plastic housings or fittings and can be installed in either direction to provide forward or reverse flow capabilities. Featuring a high quality metal seat, this direct-acting relief valve delivers low leakage, repeatable cracking pressure, low hysteresis, and long life. The valve is 100% functionally tested to ensure performance.

Key Product Facts
  • Mounting Configuration:Press-In - Into Plastic
  • Diameter:4.69 mm
  • Full Open Lohm Rate:250 Lohms
  • Maximum Working Pressure:Dependent on Housing Material
  • Relief Pressure Range:100 to 625 kPa

Product Information

General Performance
Characteristic Specification
Full Open Lohm Rate 250 Lohms
Leakage 10 SCCM (max) at 172 kPa (25 psid) on Air
Maximum Working Pressure Dependent on Housing Material, Configuration, and Operating Conditions
Materials
COMPONENT MATERIAL
Body 303 Stainless Steel
Cage 305 Stainless Steel
Spring 302 Stainless Steel
Ball 440C Stainless Steel
Flow Curve
Cross Section View
Dimensional View
Installation Hole Details

Part Numbers & Specifications

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 Numbers & Specifications
PART NUMBER LOHM RATE CRACKING PRESSURE INSTALLATION HOLE DRAWING NUMBER APPROXIMATE WEIGHT Request Information
CCPI4510100S 250 Lohms 100 +/- 15 kPa (14.5 +/- 2.2 psid) 1INST055825S 0.5 grams Request
CCPI4510150S 250 Lohms 150 +/- 22.5 kPa (21.8 +/- 3.3 psid) 1INST055825S 0.5 grams Request
CCPI4510200S 250 Lohms 200 +/- 30 kPa (29 +/- 4.4 psid) 1INST055825S 0.5 grams Request
CCPI4510250S 250 Lohms 250 +/- 37.5 kPa (36.3 +/- 5.4 psid) 1INST055825S 0.5 grams Request
CCPI4510300S 250 Lohms 300 +/- 45 kPa (43.5 +/- 6.5 psid) 1INST055825S 0.5 grams Request
CCPI4510350S 250 Lohms 350 ± 52.5 kPa (50.8 ± 7.6 psid) 1INST055825S 0.5 grams Request
CCPI4510400S 250 Lohms 400 ± 60 kPa (58 ± 8.7 psid) 1INST055825S 0.5 grams Request
CCPI4510500S 250 Lohms 500 ± 75 kPa (72.5 ± 10.9 psid) 1INST055825S 0.5 grams Request
CCPI4510550S 250 Lohms 550 ± 82.5 kPa (79.8 ± 12 psid) 1INST055825S 0.5 grams Request
CCPI4510625S 250 Lohms 625 ± 93.8 kPa (90.6 ± 13.6 psid) 1INST055825S 0.5 grams Request
Cracking pressure is defined as the pressure at which uprun flow exceeds 50 SCCM of air.

Installation & Accessories

Replacement Parts & Accessories
PART NUMBER DESCRIPTION
CCRT0055034S Forward 4.5 mm Press-In Installation Tool
CCRT0055036S Reverse 4.5 mm Press-In Installation Tool

CAD Envelopes

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Questions?

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.