Stainless steel pressure relief valve PCFM series

cartridgedifferentialcorrosion-resistant

This threadless, cartridge safety pressure relief valve is constructed with medical grade 316L stainless steel and a ceramic ball for improved compatibility with aggressive fluids like hydrogen. The 5.5 mm relief valve’s locking end uses the field-proven Lee Controlled Expansion Principle to provide secure retention and eliminate the need for threads, O-rings, or secondary retainers. This direct-acting valve features all stainless steel construction including 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. - Mounting Configuration: Insert - Into Metal - Diameter: 5.47 mm - Full Open Lohm Rate: 250 Lohms - Maximum Working Pressure: 280 bar - Relief Pressure Range: 100 to 200 kPa General Performance - Lohm Rate: 250 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 - Body: 316L Stainless Steel - Cage: 316L Stainless Steel - Pin: 316L Stainless Steel - Spring: 316L Stainless Steel - Ball: Ceramic Assembly is pre-lubricated for proper installation. Do not clean prior to installation. Part Numbers & Specifications - Part Number: PCFM2554810S, Flow Direction: Forward, Lohm Rate: 250 Lohms, Cracking Pressure: 100 +/- 15 kPa (14.5 +/- 2.2 psid), Installation Hole Drawing Number: 1INST007226S, Approximate Weight: 0.73 grams - Part Number: PCFM2554815S, Flow Direction: Forward, Lohm Rate: 250 Lohms, Cracking Pressure: 150 +/- 22.5 kPa (21.8 +/- 3.3 psid), Installation Hole Drawing Number: 1INST007226S, Approximate Weight: 0.73 grams - Part Number: PCFM2554820S, Flow Direction: Forward, Lohm Rate: 250 Lohms, Cracking Pressure: 200 +/- 30 kPa (29 +/- 4.4 psid), Installation Hole Drawing Number: 1INST007226S, Approximate Weight: 0.73 grams - Part Number: PCRM2554810S, Flow Direction: Reverse, Lohm Rate: 250 Lohms, Cracking Pressure: 100 +/- 15 kPa (14.5 +/- 2.2 psid), Installation Hole Drawing Number: 1INST002604S, Approximate Weight: 0.87 grams - Part Number: PCRM2554815S, Flow Direction: Reverse, Lohm Rate: 250 Lohms, Cracking Pressure: 150 +/- 22.5 kPa (21.8 +/- 3.3 psid), Installation Hole Drawing Number: 1INST002604S, Approximate Weight: 0.87 grams - Part Number: PCRM2554820S, Flow Direction: Reverse, Lohm Rate: 250 Lohms, Cracking Pressure: 200 +/- 30 kPa (29 +/- 4.4 psid), Installation Hole Drawing Number: 1INST002604S, Approximate Weight: 0.87 grams Cracking pressure is defined as the pressure at which uprun flow exceeds 50 SCCM of air. - Flow Curve: See product images for detailed flow curve. - Cross Section Views: Relief Flow Forward and Reverse Configurations available. - Dimensional Views: All dimensions are in millimeters. Overall length before installation. - Installation Hole Details: Relief Flow Forward Configurations (Drawing Number: 1INST007226S), Relief Flow Reverse Configuration (Drawing Number: 1INST002604S). - Replacement Parts & Accessories: CCRT0900120S – 558 Series Installation Tool Key Technical Specifications - Valve Type: Pressure Relief Valve - Series: 558 Series - Material: 316L Stainless Steel, Ceramic Ball - Mounting: Insert - Into Metal - Diameter: 5.47 mm - Full Open Lohm Rate: 250 Lohms - Maximum Working Pressure: 280 bar - Relief Pressure Range: 100 to 200 kPa - Leakage: 10 SCCM (max) at 172 kPa (25 psid) on Air - Installation Force: 625 kgf (max) - Weight: 0.73–0.87 grams (depending on configuration)