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This page explains how Check Valves is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
Check valves are one-way flow-control components used in fluid handling systems to permit flow in a single direction and to block reverse flow.
Technical details and manufacturing context for Check Valves
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Nominal Diameter | 15–300 mm | Common range for industrial check valvesISO 6708 |
| Operating Pressure | 1.0–1.6 MPa | Below 1.0 MPa the seat load is insufficient |
| Operating Temperature | -40–85 °C | Seal material limits the upper range |
| Cracking Pressure | 0.005–0.05 MPa | Lower values for gravity-sensitive systems |
| Leakage Rate | 0–0.1 mL/min | Class A for metal-to-metal seatsISO 5208 |
| Flow Coefficient (Cv) | 2.5–120 Cv | Higher Cv reduces pressure drop |
| Body Material | WCB, CF8, CF8M | CF8M for corrosive mediaASTM A216, A351 |
| Seat Material | PTFE, PEEK, 13Cr | PTFE for chemical resistance |
| End Connection | Flanged, Threaded, Wafer | Flanged for high pressureISO 7005, ASME B16.5 |
| Weight | 2–150 kg | Depends on size and pressure class |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is essential for the following industrial systems and equipment:
| pressure: | Up to 6000 psi (414 bar) depending on design, with typical working pressure 150-300 psi |
| flow rate: | 0.1 to 5000 GPM (0.4 to 18,900 L/min) based on valve size and type |
| temperature: | -40°C to 150°C (typical), up to 200°C for high-temp variants |
| slurry concentration: | Up to 40% solids by weight for slurry-specific designs, standard valves limited to 5% |
Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.
Quoted from the published standard.
12 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.
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A practical evidence checklist for RFQ preparation and supplier evaluation.
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A check valve allows fluid to flow in one direction and automatically prevents reverse flow. It operates based on differential pressure, opening when upstream pressure exceeds downstream pressure plus cracking pressure, and closing when pressure equalizes or reverses.
Common materials include stainless steel, PTFE, and ceramic. Body materials may be WCB, CF8, or CF8M, and seat materials may be PTFE, PEEK, or 13Cr. Material selection depends on the fluid, temperature, and pressure requirements.
Consider the nominal diameter, operating pressure and temperature, cracking pressure, leakage rate, flow coefficient (Cv), end connections, and materials. Verify these parameters with the manufacturer for your specific process conditions.
Relevant standards include ISO 6708 for nominal diameter, ISO 5208 for pressure testing and leakage, ASTM A216/A351 for body materials, and ISO 7005 or ASME B16.5 for end connections. These are references for verification, not proof of certification.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
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