Dual Plate Check Valve — Products & Sub-categories
Dual Plate Check Valve
Dual Plate Check Valve Suppliers in Nigeria provide compact, low-pressure-drop solutions for preventing reverse flow
In Nigerian oil and gas, power, water and industrial pipeline systems, preventing reverse flow is particularly important around pumps, compressors and pressure-sensitive equipment. A dual plate check valve uses two spring-assisted plates that open independently with forward flow and return toward the seats when flow decreases or reverses. Compared with a conventional swing check valve, its compact construction and short disc travel can make it suitable where installation space and closing response are important. Technical Specifications Parameter Typical Specification Product Type Dual Plate Check Valve, Dual Plate Flanged, Dual Plate Lug, Dual Plate Wafer Operating Principle Spring-Assisted Dual Plate Operation Automatic / Flow-Activated End Connection Wafer / Lug / Flanged Pressure Rating ASME Class 150 / 300 / 600 / 900, depending on design Size Range DN50–DN1200 (2”–48”), depending on design Installation Horizontal / Vertical, subject to design Wafer: Chosen where compact face-to-face dimensions and reduced valve weight are important. Lug: Selected where the piping arrangement requires a bolted lug-style connection. Flanged: Used where the pipeline specification calls for direct flanged connections. Materials & Components Body ASTM A216 WCB Carbon Steel / ASTM A351 CF8M Stainless Steel / ASTM A995 Duplex / Ductile Iron, depending on design Internal Components Plates:SS316 / SS304 / Duplex Stainless Steel / Carbon Steel Hinge & Hinge Pin: SS316 / SS304 / Application-Specific Alloy Seat: Stainless Steel / Hardened Alloy / EPDM / NBR Springs: Stainless Steel / Spring Steel Seals: NBR / EPDM / PTFE, depending on service Fasteners: Carbon Steel / Stainless Steel Coating: Fusion-Bonded Epoxy / Project-Specified Coating, where applicable Applications in Nigeria Dual plate check valves are suitable for crude-oil and gas pipelines, refinery process lines, power-plant cooling and utility systems, water transmission networks and industrial pumping stations. Their compact design is particularly useful around pump discharge lines and space-restricted process piping, where limiting reverse flow and reducing installation footprint are important. For high-velocity or high-pressure services, the valve should be evaluated for pressure drop, minimum flow velocity, closing characteristics and potential pressure surges before selection. Standards Depending on the design and service, applicable standards may include API 594 for check valves, ASME B16.34 for applicable valve construction and API 598 or ISO 5208 for pressure testing. API 6D may apply where the valve is designed for pipeline applications within its scope. The applicable requirements should be confirmed against the specific valve design and project specification.
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