Dual Plate Check Valve

Designed for fast and efficient reverse-flow protection, the Dual Plate Check Valve uses two spring-loaded plates to respond quickly to changes in flow direction. The split-disc configuration reduces the closing stroke and disc inertia, helping minimize pressure surges while maintaining a compact and lightweight valve arrangement. Its streamlined flow path also supports efficient fluid passage with relatively low pressure loss.

The Dual Plate Check Valve is well suited for oil & gas pipelines, petrochemical plants, power generation, water treatment, HVAC, and general industrial piping systems. Its compact wafer or lug-style construction makes it particularly suitable for applications where installation space, weight, and rapid closing response are important considerations.

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Technical Specifications

Product description:	Dual Plate Check Valve
Model:	H46H-Dual Plate Check Valve
Nominal diameter:	NPS 2”～48”
Operating temperature:	-29℃～593℃(the range of service temperature may vary for different materials)
Nominal pressure:	CLASS 150～2500
Material:	Main material: A216 WCB、WCC; A217 WC6、WC9、C5、C12、C12A、CA15; A351 CF8、CF8M、CF3、CF3M、CF8C、CN3MN、CK3MCUN、CN7M; A352 LCB、LCC; A494 CW-6MC、CU5MCuC、M35-1；A890 4A(CD3MN)、5A(CE3MN)、6A(CD3MWCuN); ASME B 148 C95800、C95500, etc.
Design standard:	API 6D、API 594、ASME B16.34
Structural length:	API 6D、API 594
Connecting end:	ASME B16.5、ASME B16.47、GB/T 9113
Test standard:	API 598、ISO 5208、GB/T 26480、GB/T 13927
Operation method:	The valve clack is automatically opened and closed under the medium force to prevent flowing to another direction.
Application fields:	For application in fields such as electric power industry, petroleum refining, petrochemical engineering, offshore oil, tap water engineering in urban construction, chemical engineering, etc.

Features & Benefits

Protects piping systems by automatically preventing backflow and maintaining process integrity.

Dual Plate Design

Two independently hinged plates distribute flow forces and provide rapid response when forward flow decreases.

Spring-Assisted Closure

Integrated springs help return the plates toward the closed position before significant reverse flow develops.

Fast Closing Response

Short disc travel and low inertia help reduce reverse-flow velocity and limit pressure surges.

Reduced Water Hammer

Controlled spring-assisted closure helps minimize the impact associated with sudden changes in flow direction.

Low Pressure Drop

The streamlined split-disc arrangement allows efficient passage of the process medium with reduced flow resistance.

Compact & Lightweight Construction

Thin body dimensions and reduced weight simplify transportation, installation, and piping support requirements.

No External Actuator Required

Self-acting operation eliminates the need for external power, control signals, or operating mechanisms.

Flexible Installation

Wafer-style configurations can be installed between pipeline flanges, reducing overall face-to-face dimensions and space requirements.

Reduced Maintenance Requirements

A simple internal mechanism with fewer moving components helps simplify routine inspection and servicing.

Broad Industrial Application

Suitable for oil & gas, petrochemical, chemical processing, power generation, water treatment, HVAC, and general industrial pipeline systems.

Application Scenario

Chemical Industry

Ball valves, butterfly valves, gate valves, globe valves, check valves, and control valves ensure safe fluid isolation, precise process control, and reliable operation in demanding chemical processing applications.

Oil Industry

Engineered for reliable isolation, flow regulation, and backflow prevention, our valve solutions support upstream, midstream, and downstream oil production and refining operations.

Natural Gas

Providing leak-tight sealing, dependable flow control, and safe pipeline operation for natural gas transmission, storage, LNG, and distribution systems.

Metallurgy

Built to withstand high temperatures, abrasive media, and harsh operating conditions in steelmaking, smelting, and metallurgical processing.

Power Generation

Ensuring reliable isolation, accurate flow control, and long-term performance in steam, boiler, turbine, and power plant systems.

Pharmaceutical

Delivering hygienic, precise, and contamination-free flow control for pharmaceutical manufacturing and clean process applications.

Steel Industry

Designed for high-temperature, high-pressure, and severe-service conditions in iron making, steelmaking, rolling mills, and auxiliary process systems.

New Energy

Supporting hydrogen, LNG, carbon capture, battery materials, and renewable energy projects with advanced valve solutions for safe and efficient process control.