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Pressure Relief Valves

558 LC Series Press-in Pressure Relief Valve

This cartridge safety pressure relief valve offers superior flow capacity for its size. This direct-acting relief valve is specifically designed for installation into plastic housings and fittings. It can be installed in either forward or reverse flow directions. The valve features all stainless steel construction, making it compatible with a wide range of fluids and gases. A high quality metal seat provides low leakage, repeatable cracking pressure, fast response time, low hysteresis, and long life. The valve is 100% functionally tested to ensure performance.

Key Product Facts
  • Mounting Configuration:Press-In - Into Plastic
  • Diameter:5.46 mm
  • Full Open Lohm Rate:140 Lohms
  • Maximum Working Pressure:Dependent on Housing Material
  • Relief Pressure Range:100 to 500 kPa

Product Information

General Performance
Characteristic Specification
Full Open Lohm Rate 140 Lohms
Leakage 10 SCCM (max) at 172 kPa (25 psid) on Air
Maximum Working Pressure, Checked Direction 280 bar
Maximum Working Pressure Differential, Flow Direction 40 bar
Installation Force 625 kgf (max)
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
CLCP5510100S 140 Lohms 100 +/- 15 kPa (14.5 +/- 2.2 psid) 1INST072393S 0.87 grams Request
CLCP5510200S 140 Lohms 200 +/- 30 kPa (29 +/- 4.4 psid) 1INST072393S 0.87 grams Request
CLCP5510300S 140 Lohms 300 +/- 45 kPa (43.5 +/- 6.5 psid) 1INST072393S 0.87 grams Request
CLCP5510400S 140 Lohms 400 ± 60 kPa (58 ± 8.7 psid) 1INST072393S 0.87 grams Request
CLCP5510500S 140 Lohms 500 ± 75 kPa (72.5 ± 10.9 psid) 1INST072393S 0.87 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
CCRT0900170S Forward 558 LC Series Press-In Installation Tool
CCRT0072391S Reverse 558 LC Series Press-In Installation Tool
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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.