This page explains how Check Valve 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.
A check valve is a one-way flow control device that allows fluid to pass in one direction while preventing backflow, protecting systems from reverse flow damage.
Technical details and manufacturing context for Check Valve
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Nominal Diameter | 15–300 mm | Standard pipe sizesISO 6708 |
| Operating Pressure | 1.0–1.6 MPa | Below 1.0 MPa the seat load is insufficientISO 5208 |
| Operating Temperature | -40–85 °C | Seal material limits |
| Cracking Pressure | 0.05–0.1 MPa | Minimum pressure to open |
| Leakage Rate | ≤0.1 mL/min | At 1.1× rated pressureISO 5208 |
| Flow Coefficient (Cv) | 10–250 US gal/min | At full open |
| Body Material | WCB/CF8/CF8M | Carbon or stainless steelASTM A216/A351 |
| Seal Material | PTFE/NBR/EPDM | Chemical compatibility |
| End Connection | Flanged/Threaded/Wafer | Flange rating matches pressureASME B16.5 |
| Weight | 2–120 kg | Depends on size and material |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
Commonly used trade names and technical identifiers for Check Valve.
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 only, automatically preventing reverse flow when downstream pressure exceeds upstream pressure. This protects piping systems and equipment from damage caused by backflow, such as water hammer or contamination.
Selection is based on the required nominal diameter (DN) and pressure rating (PN) for your system, as well as the end connections and cracking pressure. Refer to the manufacturer's data for the specific model, and verify that the valve meets the applicable standards such as ISO 6708 and ISO 7268.
Common body materials include WCB (cast carbon steel), CF8 (304 stainless steel), CF8M (316 stainless steel), and brass (C36000). Seat materials may include PTFE, PEEK, or nitrile. Material choice depends on the fluid, temperature, and pressure requirements.
Regular inspection for seat wear, disc movement, and leakage is recommended. Check for signs of erosion, corrosion, or debris buildup. Verify that the cracking pressure remains within specification. Follow the manufacturer's maintenance guidelines and replace worn parts as needed.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
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