Design features
a streamlined axial disc path intended to combine low disturbance with rapid non-slam closure
Final dimensions, materials, ratings and documentation depend on the approved configuration.
Check valves / LIANGGU
Axial Flow Check Valve
This model is a check valve distinguished by a streamlined axial disc path intended to combine low disturbance with rapid non-slam closure. For a project quotation, share the required size, pressure designation, materials, seating, connections and quantity. Final suitability is confirmed against the approved specification.
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Understand this valve.
Working principle
forward differential pressure opens the closure element; falling or reversing flow returns it toward the seat; closing behavior depends on line velocity, orientation, inertia, spring force, and the system transient; verify minimum stable flow and pressure loss
Typical applications
gas transmission, compressor discharge, high-velocity water, and critical rotating-equipment protection
Selection priorities
spring rate, minimum stable flow, pressure loss, response time, transient analysis, and dynamic flow profile
SPECIFICATION REVIEW
Define the required configuration.
Manufacturer-listed options remain subject to the selected design and service. They are not fixed specifications for every configuration.
| Size / DN or NPS | Project-specific — include in your RFQ |
|---|---|
| Pressure designation | Project-specific — include in your RFQ |
| Common material options | Manufacturer optionCarbon steel, low-temperature steel, stainless steel, alloy steel, or another approved alloy after service and fabrication review |
| End connection & standard | Manufacturer optionFlanged or butt-welded ends, or a wafer pattern where specifically identified, matched to the approved piping class |
| Actuation & accessories | Manufacturer optionSelf-acting no external actuator unless the approved design includes assisted closure or position indication |
| Design standards | Manufacturer optionAPI 594 may apply to flanged, lug, wafer, or butt-welded check valves; API 6D or ISO 14313 may apply to qualifying pipeline-valve service |
| Lead time & documentation | Confirmed in the written quotation |
Other materials & project configurations
Listed materials are common options, not an exhaustive range. Share the required grade and service conditions so we can review suitability, manufacturing feasibility and availability.
Catalogue information supports the enquiry. Approved technical documents define the final supply.
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