Name: Dual Plate Check Valve With Spring Closure
Availability: InStock

GKV522 Dual Plate Check Valve

Size Range

DN40 to DN1200 （1.5" - 48")

Body & Bonnet Material

A105, Stainless Steel (A351 CF8/CF8M), Ductile Iron (ASTM A395), Cast Iron (ASTM A126), Duplex / Super Duplex, Nickel Alloys

Temperature Range

-29°C to +520°C

Stem / Shaft Material

304 / 316 / CF8M stainless steel, optional hardening or low-friction coating

Maximum Allowable Working Pressure

Class 150LB to Class 1500LB

Seats & Seals

Metal-to-metal, PTFE, RPTFE, PCTFE, elastomeric options for various media and temperatures

Packing & Gland

PTFE, Graphite composite, low-temperature or high-temperature resistant

End Connection Standards

Flanged: ASME B16.5 / EN1092, Butt Weld: ASME B16.25, Other custom connections

Operation Method

Manual (Handwheel / Gear), Pneumatic, Electric Actuated

Flow Orientation

Horizontal, Vertical, Angle installation

Design Standards

API 594, API 6D, ISO 14313, ASME B16.34, EN 12334

Testing & Inspection

Pressure & Leakage Test: API 598 / ISO 5208, Hydrostatic Test, NDT: X-Ray / Ultrasonic / Magnetic Particle, Functional Flow Test

Applications

Oil & Gas pipelines, Chemical / Petrochemical, Water Treatment, Power Generation, HVAC systems, High-Pressure Industrial Fluids

Key Highlights

Reliable backflow prevention, low pressure drop, corrosion & wear-resistant, minimal maintenance, high reliability, modular & customizable design

Model No.	End Connection	Size	Pressure Rating	End Facing
GKV522A	Wafer type	1.5"-60" (40mm-1500mm)	CL125, CL150, CL300, CL600	FF/RF/RTJ
GKV522B	Lugged type	1.5"-36" (40mm-900mm)	PN10, PN16, PN20, PN25, PN40, PN50	FF/RF
GKV522C	Flanged type	1.5"-36" (40mm-900mm)	5K, 10K, 20K	FF/RF

Face-to-Face Dimensions: API 594, API 6D, ISO 5752, EN 558-1

Flange Standards: MSS-SP 6, ASME B16.1, ASME B16.5, ISO 468

Inspection Standards: API 598, ISO 5208

Marking: MSS-SP 44

The internal mechanism consists of two semicircular plates assembled with

springs, ensuring quick closure by spring action and opening through fluid

pressure. This rapid reaction protects piping systems from water hammer effectively.

Lightweight and Durable: Easier to install and maintain.

Quick Reaction: Protects piping from water hammer.

Versatile End Connections: Wafer, Lugged, and Flanged types.

Wide Pressure Rating: Suitable for PN10–PN50, CL125–CL600,

5K–20K.

Compliance: Designed according to API 594, ISO 5752,

EN 558-1 standards.

Tested for Reliability: Seat testing at 11 bar (160 psi), Body

testing at 15 bar (220 psi).

Instruction Manual

Double Plate Check Valve - English
Product Brochure

Double Plate Check Valve - English

Water Treatment & Supply
Used in municipal water systems and wastewater treatment to prevent backflow and protect pumps and pipelines.
Oil, Gas & Chemical Pipelines
Prevents reverse flow in pipelines transporting oil, natural gas, or chemicals, ensuring system safety and operational reliability.
Steam & Hot Water Systems
Used in power plants, boilers, and heating systems to avoid energy loss and protect pipelines from backflow.
Pump Discharge Protection
Installed at pump outlets to prevent reverse rotation, water hammer, and safeguard pump equipment.
HVAC Systems
Ensures one-way flow in circulating water systems, protecting circulation pumps and valves.
Key Advantages
Prevents backflow, reduces water hammer, saves space, low pressure loss, and easy maintenance due to lightweight and compact design.

Hot Tags :

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