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Pressure Relief Valves

558 Series Press-In Pressure Relief Valve

This cartridge safety pressure relief valve is designed specifically for installation into soft tubing, plastic housings, and fittings. It can be installed in either direction, providing forward or reverse flow capabilities. The direct-acting relief valve features all stainless steel construction with a high quality metal seat that delivers low leakage, repeatable cracking pressure, fast response time, low hysteresis, and long life. The valve is 100% functionally tested to ensure performance.

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Key Product Facts
  • Mounting Configuration:Press-In - Into Plastic
  • Diameter:5.46 mm
  • Full Open Lohm Rate:250 Lohms
  • Maximum Working Pressure:Dependent on Housing Material
  • Relief Pressure Range:100 to 625 kPa
For More Information

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 or Ceramic
Flow Curve
Cross Section View
Dimensional View
This image is for reference only. All dimensions are in millimeters.
Installation Hole Details
Installation Hole Drawing Number: 1INST006189S
This image is for reference only. All dimensions are in millimeters.

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
Filter Part Numbers
BALL MATERIAL
PART NUMBER LOHM RATE CRACKING PRESSURE
BALL MATERIAL
INSTALLATION HOLE DRAWING NUMBER APPROXIMATE WEIGHT Request Information
CCPI5510100S 250 Lohms 100 +/- 15 kPa (14.5 +/- 2.2 psid) 440C Stainless Steel 1INST006189S 0.65 grams Request
CCPI5510150S 250 Lohms 150 +/- 22.5 kPa (21.8 +/- 3.3 psid) 440C Stainless Steel 1INST006189S 0.65 grams Request
CCPI5510200S 250 Lohms 200 +/- 30 kPa (29 +/- 4.4 psid) 440C Stainless Steel 1INST006189S 0.65 grams Request
CCPI5510250S 250 Lohms 250 +/- 37.5 kPa (36.3 +/- 5.4 psid) 440C Stainless Steel 1INST006189S 0.65 grams Request
CCPI5510300S 250 Lohms 300 +/- 45 kPa (43.5 +/- 6.5 psid) 440C Stainless Steel 1INST006189S 0.65 grams Request
CCPI5510350S 250 Lohms 350 ± 52.5 kPa (50.8 ± 7.6 psid) 440C Stainless Steel 1INST006189S 0.65 grams Request
CCPI5510400S 250 Lohms 400 ± 60 kPa (58 ± 8.7 psid) 440C Stainless Steel 1INST006189S 0.65 grams Request
CCPI5510500S 250 Lohms 500 ± 75 kPa (72.5 ± 10.9 psid) 440C Stainless Steel 1INST006189S 0.65 grams Request
CCPI5510550S 250 Lohms 550 ± 82.5 kPa (79.8 ± 12 psid) 440C Stainless Steel 1INST006189S 0.65 grams Request
CCPI5510625S 250 Lohms 625 ± 93.8 kPa (90.6 ± 13.6 psid 440C Stainless Steel 1INST006189S 0.65 grams Request
CCPI5580100S 250 Lohms 100 +/- 15 kPa (14.5 +/- 2.2 psid) Ceramic 1INST006189S 0.65 grams Request
CCPI5580150S 250 Lohms 150 +/- 22.5 kPa (21.8 +/- 3.3 psid) Ceramic 1INST006189S 0.65 grams Request
CCPI5580200S 250 Lohms 200 +/- 30 kPa (29 +/- 4.4 psid) Ceramic 1INST006189S 0.65 grams Request
CCPI5580250S 250 Lohms 250 +/- 37.5 kPa (36.3 +/- 5.4 psid) Ceramic 1INST006189S 0.65 grams Request
CCPI5580300S 250 Lohms 300 +/- 45 kPa (43.5 +/- 6.5 psid) Ceramic 1INST006189S 0.65 grams Request
CCPI5580350S 250 Lohms 350 ± 52.5 kPa (50.8 ± 7.6 psid) Ceramic 1INST006189S 0.65 grams Request
CCPI5580400S 250 Lohms 400 ± 60 kPa (58 ± 8.7 psid) Ceramic 1INST006189S 0.65 grams Request
CCPI5580500S 250 Lohms 500 ± 75 kPa (72.5 ± 10.9 psid) Ceramic 1INST006189S 0.65 grams Request
CCPI5580550S 250 Lohms 550 ± 82.5 kPa (79.8 ± 12 psid) Ceramic 1INST006189S 0.65 grams Request
CCPI5580625S 250 Lohms 625 ± 93.8 kPa (90.6 ± 13.6 psid Ceramic 1INST006189S 0.65 grams Request
Clear Filters
Cracking pressure is defined as the pressure at which uprun flow exceeds 50 SCCM of air.

Installation & Accessories

Installation & Manufacturing Tools
Replacement Parts & Accessories
PART NUMBER DESCRIPTION
CCRT0900170S 558 Series Press-In Installation Tool

CAD Envelopes

Resources

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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.

Lohms for Liquids Lohms for Gases