Design features
a compact forged body for automatic backflow protection on high-integrity lines
Final dimensions, materials, ratings and documentation depend on the approved configuration.
Check valves / LIANGGU
Forged Steel High Pressure Check Valve
This model is a check valve distinguished by a compact forged body for automatic backflow protection on high-integrity lines. For a project quotation, share the required size, pressure designation, materials, seating, connections and quantity. Final suitability is confirmed against the approved specification.
PRODUCT DETAILS
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 trim grades and end connection
Typical applications
refinery high-pressure branches, steam services, chemical injection, and power-plant auxiliaries
Selection priorities
forging and trim grades, end connection, cracking pressure, closure type, NDE scope, and traceability
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 optionForged carbon, low-temperature, stainless, or alloy steel grades selected from the pressure-temperature envelope, corrosion review, and required heat treatment |
| End connection & standard | Manufacturer optionButt-welded, socket-welded, threaded, or flanged ends only within the selected product design and piping-class scope |
| Actuation & accessories | Manufacturer optionSelf-acting check function; any assisted-closure or damping system must be confirmed for the selected design and project duty. |
| Design standards | Manufacturer optionAPI 602 or API 594 may apply depending on size and construction; pipeline designs may instead invoke API 6D or ISO 14313 within scope |
| 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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