Fully Rubber Lined Dual Plate Check Valves

Valve Type Dual Plate Wafer Check Valve
Design Type Wafer, Dual Plate (Spring-loaded tilting disc)
Nominal Size (DN) DN50 ~ DN600 (2″ ~ 24″)
Pressure Rating PN10 / PN16 / PN25; Class 125LB / 150LB
End Connection Wafer Type (clamped between flanges)
Face-to-Face Standard API 594 / ISO 5752 / EN 558
Design Standard API 594 / JB/T 8937 / DIN 3356
Testing Standard API 598 / GB/T 13927 / ISO 5208
Certification CE, WRAS, ACS and other certifications available

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Fully rubber lined dual plate check valves are specifically designed for corrosive and abrasive media applications. They feature a full rubber lining on all internal surfaces, significantly enhancing the valve’s wear and corrosion resistance. The compact wafer design makes them ideal for installation in systems with limited space.

Fully Rubber Lined Dual Plate Check Valve Technical Data Sheet

General Specifications

Parameter	Specificatie
Kleptype	Dual Plate Wafer Check Valve
Design Type	Wafer, Dual Plate (Spring-loaded tilting disc)
Nominal Size (DN)	DN50 ~ DN600 (2″ ~ 24″)
Drukclassificatie	PN10 / PN16 / PN25; Class 125LB / 150LB
End Connection	Wafer Type (clamped between flanges)
Face-to-Face Standard	API 594 / ISO 5752 / EN 558
Design Standard	API 594 / JB/T 8937 / DIN 3356
Testing Standard	API 598 / GB/T 13927 / ISO 5208
Certification	CE, WRAS, ACS and other certifications available

Material Construction

Lichaam: Ductile Iron (GGG40, GGG50), Carbon Steel (WCB), Gray Cast Iron (GG25, HT200), Stainless Steel (CF8, CF8M)
Disc (Dual Plates): Ductile Iron, Stainless Steel (SS304, SS316), Bronze, Duplex SS
Shaft/Hinge Pin: Stainless Steel (SS304, SS316)
Lente: Stainless Steel (SS304, SS316)
Lining Material: EPDM, NBR, Natural Rubber, VITON, PTFE
Body Style Options: Wafer, Lug, Double Flanged

Key Design Features

Feature	Benefit
Full Internal Lining	The valve body interior, sealing surfaces, and discs in contact with the medium are fully coated with rubber, providing excellent corrosion, wear, and abrasion resistance.
Dual Plate Design	Two spring-loaded half-moon plates rotate on a central hinge pin for low pressure drop and high flow capacity (Cv values).
Spring-Assisted Closure	Torsion springs ensure the plates close rapidly and automatically upon flow reversal, preventing backflow and minimizing the water hammer effect.
Silent Operation	The controlled, spring-assisted closure eliminates water hammer and reduces pipeline vibration, contributing to quieter operation.
Compact & Lightweight	The wafer design is shorter, lighter, and takes up less space than conventional swing check valves, making it easy to install between standard flanges.
Excellent Sealing	Rubber-to-rubber seating ensures bubble-tight shutoff and zero leakage, meeting EN 12266-1 Class A standards.
Versatile Installation	Can be installed in horizontal or vertical upward flow lines, provided spring torque is suitable for the application.

Performance Data

Parameter	Specificatie
Working Temperature Range	-15°C to +80°C (typical for EPDM/NBR)
Suitable Media	Water, sewage, oil, weak corrosive fluids, acids, alkalis, and chemical solutions
Lekkageklasse	Zero Leakage (Bubble-tight) per API 598 / ISO 5208 Class A
Flow Direction	Uni-directional
Opening Pressure	< 0.2 bar

Pressure / Temperature Ratings

Typical shell and seal test pressures at various pressure ratings are detailed in the table below. Please ensure operating conditions align with the pressure-temperature rating standards.

Nominal Pressure (PN)	Shell Test Pressure (Hydrostatic)	Seal Test Pressure
PN10 (1.0 MPa)	1.5 MPa	1.1 MPa
PN16 (1.6 MPa)	2.4 MPa	1.76 MPa
PN25 (2.5 MPa)	3.75 MPa	2.75 MPa
Klas 150	1.5 x Rated Pressure	Per API 598

Typical Applications

Water and wastewater treatment
Chemical processing and transfer lines
Power plant desulfurization systems
Mining and mineral slurry handling
HVAC and building services
Industrial cooling water circuits

GARANTIE:

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