Pump Head / Fluid Block
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This page explains how Check Valves (Inlet & Outlet) 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 installed at the inlet and outlet of a pump head or fluid block ensure unidirectional fluid flow, preventing reverse flow that could damage the pump or disrupt system operation.
Technical details and manufacturing context for Check Valves (Inlet & Outlet)
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Nominal Diameter | 15–100 mm | Common sizes for pump inlet/outletISO 6708 |
| Test Pressure | 1.5–2.4 MPa | Hydrostatic shell test |
| Operating Temperature | -20–120 °C | Seat material limits range |
| Cracking Pressure | 0.02–0.05 MPa | Minimum pressure to open |
| Leakage Rate | 0–0.1 mL/min | At 1.1× rated pressureISO 5208 |
| Flow Coefficient (Cv) | 5–120 US gal/min | At full open, water |
| Body Material | WCB/CF8/CF8M | Carbon steel or stainlessASTM A216/A351 |
| Seat Material | PTFE/NBR/EPDM | Chemical compatibility |
| End Connection | Flanged/Threaded | Flange rating matches pressureISO 7005 |
| Weight | 1.5–25 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.
This component is essential for the following industrial systems and equipment:
| pressure: | Up to 25 bar (standard), 40+ bar with reinforced designs |
| flow rate: | 0.5 to 500 L/min depending on valve size and design |
| temperature: | -20°C to 120°C (standard elastomers), up to 200°C with specialty materials |
| slurry concentration: | Up to 15% solids by weight (standard), higher with abrasion-resistant materials |
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.
Manufacturer profiles associated with Check Valves (Inlet & Outlet).
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A practical evidence checklist for RFQ preparation and supplier evaluation.
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The inlet check valve prevents fluid from flowing back into the supply line when the pump stops. This maintains prime and prevents reverse rotation or damage to the pump.
Select based on the pump's inlet and outlet pipe diameter, typically matching the nominal diameter (DN) of the piping. Consider flow rate and pressure drop. Verify with the manufacturer for your specific application.
Common materials include stainless steel, brass, PVC, and PTFE. Body materials may be carbon steel (WCB) or stainless steel (CF8/CF8M). Seat materials include PTFE, NBR, or EPDM. Choose based on fluid compatibility and operating conditions.
Cracking pressure is the minimum upstream pressure required to open the valve. It ensures the valve opens at the desired system pressure. Typical values are 0.02 to 0.05 MPa. Verify the correct cracking pressure for your system to avoid premature opening or failure to open.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
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