Poppet check valve CHFA series

for gasminiaturebackflow

This miniature, high pressure check valve is only 0.187 inches in diameter and 0.82 inches in length. Its robust design prevents backflow in high pressure systems up to 8000 psi. It is ideal for applications with flow rates up to 1.5 GPM. An integral safety screen is available. - Poppet-Style Check Valves - Diameter: 0.187 inches - Lohm Rate: 210 Lohms max - Operating Pressures: Up to 8000 psi - Leakage: 1 drop / hour at 8000 psi General Performance Characteristic - Specification Cracking Pressure - 5 ± 3 or 1 ± 0.5 psid Maximum Leakage in Checked Direction at 5 psid - 1 Drop / Minute Maximum Leakage in Checked Direction at 1000-8000 psid - 1 Drop / Hour Lohm Rate at 20 psid and Greater - Unscreened: 210 Lohms, Screened: 250 Lohms Nominal System Pressure - Up to 8000 psi Nominal Weight - Unscreened: 2.0 grams, Screened: 2.2 grams Available Screen Hole Size - 0.015 inches Nominal Test Fluid - MIL-PRF-83282 at 85°F Materials PART - MATERIAL - SPECIFICATION Body - 304 CRES - AMS 5639 Pin - 17-4PH CRES - AMS 5643 Poppet - 15-5PH CRES - AMS 5659 Spring - 17-7PH CRES - AMS 5678 Spring Seat - 304 CRES - AMS 5639 Screen (Reverse Screened Version Only) - 304 CRES - QQ-S-763C Screen (Forward Screened Version Only) - 304L CRES - ASTM A 666 Braze (Forward Screened Version Only) - - AMS 4774 Post (Forward Screened Version Only) - 303 CRES - QQ-S-763C Finish: All CRES parts passivated. Pins are prewaxed. Do not degrease. Do not lubricate. Part Numbers & Specifications PART NUMBER - CRACKING PRESSURE (psid) - LOHM RATE - SCREEN HOLE SIZE (inches) - FLOW DIRECTION CHFA1876505A - 5 ± 3 - 210 Lohms Maximum - - Forward CHFA1876501A - 1 ± 0.5 - 210 Lohms Maximum - - Forward CHRA1876505A - 5 ± 3 - 210 Lohms Maximum - - Reverse CHRA1876501A - 1 ± 0.5 - 210 Lohms Maximum - - Reverse CHFA1875505A - 5 ± 3 - 250 Lohms Maximum - 0.015 - Forward CHFA1875501A - 1 ± 0.5 - 250 Lohms Maximum - 0.015 - Forward CHRA1875505A - 5 ± 3 - 250 Lohms Maximum - 0.015 - Reverse CHRA1875501A - 1 ± 0.5 - 250 Lohms Maximum - 0.015 - Reverse Replacement Parts & Accessories PART NUMBER - DESCRIPTION CUTA1870210C - Installation / Extraction Tool Set CUTA1870228C - Forward Screen Installation / Extraction Tool Set JHHA1870003A - Replacement Pin - Flow curves and cross-section views available in the image gallery. - Dimensional and installation hole details available in the image gallery. Key Technical Specifications - Diameter: 0.187 inches - Length: 0.82 inches - Max system pressure: 8000 psi - Max flow rate: 1.5 GPM - Leakage: 1 drop/hour at 8000 psi - Cracking pressure: 5 ± 3 or 1 ± 0.5 psid - Lohm rate: 210 Lohms (unscreened), 250 Lohms (screened) - Screen hole size: 0.015 inches (screened versions) - Materials: 304 CRES, 17-4PH CRES, 15-5PH CRES, 17-7PH CRES, 304L CRES, 303 CRES