Dual Plate Check Valve Manufacturer in Canada 

Technical Overview:

• Nominal Size: 2″ to 48″
• Pressure Class: Class 150 to Class 2500
• Temperature Range: -29°C to +425°C
• Design Standards: API 594, ASME B16.34
• Face to Face: API 594, ASME B16.10
• Inspection and Testing: API 598, ISO 5208
• Construction Type: Wafer Type, Double Door, Spring Assisted, Non Slam Design

Dual Plate Check Valve Construction Details:

Pressure Containing Components:

• ASTM A216 WCB
• ASTM A351 CF8
• ASTM A351 CF8M
• ASTM A351 CF3M
• ASTM A995 Grade 4A
• ASTM A995 Grade 5A
• ASTM A995 Grade 6A
• ASTM A351 CN7M
• ASTM B148 C95800

Moving Components:

• Disc: Stainless Steel / Duplex Stainless Steel
• Hinge Pin: ASTM A182 F304 / F316
• Spring: Stainless Steel / Inconel X-750
• Stop Pin: Stainless Steel

Sealing Arrangement:

• Seat: Metal Seated / Soft Seated
• Seat Insert: PTFE / RPTFE
• Body Seal: Precision Machined Metal-to-Metal Seating

Operating Principle of Dual Plate Check Valve:

Dual Plate Check Valve is engineered with two spring-loaded discs mounted on a central hinge pin to provide automatic reverse flow prevention. During forward flow, the discs open with minimal cracking pressure, allowing smooth fluid passage and reduced pressure loss. As the flow decreases or reverses, the spring mechanism rapidly closes both plates before reverse flow develops, minimizing water hammer and protecting pumps, compressors, and pipelines. The compact wafer design requires minimal installation space while providing reliable sealing performance for high-pressure and high-cycle industrial services.

Industrial Service Applications:

• Oil and gas industry: Backflow prevention in production facilities, pipelines, and processing systems.
• Petrochemical plants: Protecting pumps and compressors handling hydrocarbons and process fluids.
• Oil refineries: Preventing reverse flow in refining units and utility pipelines.
• Power generation: One-way flow control in steam, condensate, and cooling water circuits.
• Water treatment plants: Backflow prevention in potable water and wastewater distribution systems.
• Desalination plants: Reliable reverse flow protection in high-pressure water applications.
• Marine and offshore: Preventing backflow in seawater, ballast, and utility piping systems.
• Chemical processing plants: Safe handling of corrosive chemicals and industrial process media.
• Mining industry: Reverse flow control in slurry handling and mineral processing pipelines.

Dual Plate Check Valve Material Specifications:

Standard Construction Materials:

Component	Material	Grade	Typical Application
Body	Carbon Steel	ASTM A216 WCB	Oil and gas pipelines
Body	Stainless Steel	ASTM A351 CF8 / CF8M / CF3M	Corrosive process fluids
Body	Duplex Stainless Steel	ASTM A995 Grade 4A / ASTM A890 F51	Offshore and seawater service
Body	Super Duplex Stainless Steel	ASTM A995 Grade 5A / 6A	High chloride environments
Body	Alloy 20	ASTM A351 CN7M	Acidic chemical service
Body	Aluminium Bronze	ASTM B148 C95800	Marine applications
Disc	Stainless Steel	ASTM A351 CF8M	Backflow prevention
Spring	Inconel X-750	ASTM B637	High temperature and fatigue resistance
Seat	PTFE / Metal	Standard	Reliable shut-off performance

Special Material Options:

• Hastelloy C276 for aggressive chemical applications
• Inconel 625 / 718 for high-temperature and severe service
• Titanium Grade 2 / Grade 5 for marine and seawater systems
• Monel 400 for saltwater and corrosive process media

Product Specifications:

Parameter	Specification
Valve Type	Dual Plate Check Valve
Valve Design	Wafer Type / Double Door / Non Slam
Operation	Automatic
Flow Direction	Unidirectional
Disc Mechanism	Dual Spring Assisted Plates
Installation	Horizontal or Vertical (Upward Flow)
Leakage Class	Soft Seated or Metal Seated
Service Media	Water, Steam, Oil, Gas, Chemicals and Hydrocarbon Fluids

Available End Connections:

• Wafer type suitable for ASME B16.5 flanges
• Lug type available on request
• Double flanged construction for selected applications
• Custom end configurations based on project specifications