Wafer Type

Dual Plate Check Valves (Patent Granted in UK: GB2493038, & Patent Pending for Registration in IPA, USA, Italy, China, European Phase & India)
HAWA Valves has extensive experience in manufacturing of Dual Plate Check Valves which are offered in a Patented “Retainerless” Design, which has subsequently become an industry standard for Dual Plate Check Valves throughout the hydrocarbon, energy and process industries across the world.
Size: 2” up to 56“ (DN 50 up to DN 1400)

Pressure Rating: ASME 150# to 2500#

Materials: Carbon Steels, Low Temperature Carbon Steel, Martensitic Steels, Austenitic Stainless Steel, Duplex Stainless Steels, Super Duplex Stainless Steels, Nickel Alloys, Nickel Aluminum Bronze, Hastelloy, Inconel, Titanium Alloy & Carbon Steel with Internal Corrosion Resistant Alloy (CRA) Overlay

Design Standard: API 6D, API 594, MESC SPE 77 / 133

Pressure / Temperature Rating: ASME B 16.34

Test (Inspection) Standard: API 598, API 6D, ISO 5208 MESCSPE 77/133, ISO 15848-1&2 Bs6364

Construction Details: Dual Plate, Soft and Metal Seated

End Connection: Screwed, Socket Weld, Flanged, Hub End, Butt-Weld

Operator / Actuator: Lever, Gear, Actuator (Pneumatic, Hydraulic, Electro-Hydraulic and Electric Motorised)

Dual Plate Check Valves are available in five different types:
• Wafer Type
• Solid Lug Type
• Double Flange type
• Hub End type
• Butt weld end type

Cryogenic Service: Almost all Hawa Valves Dual Plate Check Valve types can be designed in a special version suitable for cryogenic service. In this case, all the materials and technical features are designed to withstand minimum design
temperature required by the Customer, down to Cryogenic -196°C. If required by the customer, specific Cryogenic Tests are performed to verify the behaviour of valves sealing capability and emissions etc. vs the ambient.