Butterfly Check Valve

Butterfly Check Valve is an industrial valve manufactured for pipeline systems to prevent reverse flow and maintain reliable one-way fluid control.

Dual Plate Disc Design
Two semi-circular discs rotate around a central shaft and respond to flow conditions for automatic opening and closing.

Heavy-Duty Valve Body Construction
Robust valve body construction provides high rigidity for large-diameter pipeline applications.

Spring-Assisted Dual Plate Assembly
Spring-assisted dual plate assembly provides smooth movement and stable valve response during operation.

Reduced Water Hammer Impact
Dual plate movement helps reduce pressure impact during reverse flow closure and supports smoother pipeline operation.

Low Flow Resistance Design
Streamlined flow passage helps minimize pressure loss and improve fluid transfer efficiency.

Non-Slam Closing Performance
The dual plate design uses short disc travel and spring-assisted closing to reduce reverse velocity and minimize water hammer effects in pipeline systems.

A butterfly check valve operates through two semi-circular discs mounted on a central shaft.

During normal flow:

• Fluid pressure pushes the discs open.
• The streamlined disc movement allows fluid passage with reduced pressure loss.
• Spring assistance helps maintain stable valve response.

During reverse flow:

• The flow direction changes.
• The discs automatically return to the closed position.
• Fast closing action helps reduce reverse velocity and pressure impact.

The dual plate structure provides a compact alternative to traditional swing check valves, especially where installation space and fast response are important.

Water Supply & Treatment Systems
Used in water transmission pipelines, pumping stations, and treatment facilities to prevent reverse flow and protect system equipment.

Pump Outlet Pipeline Protection
Installed at pump discharge pipelines to prevent backflow during pump shutdown and improve system safety.

Industrial Process Pipelines
Suitable for manufacturing, chemical, and process systems requiring reliable one-way flow control.

Power Plant Auxiliary Systems
Applied in cooling water, circulating water, and utility pipeline systems.

HVAC & Building Water Systems
Used for chilled water, heating water, and circulation systems requiring compact valve installation.

Butterfly check valves are inspected during machining, assembly, and final testing. Inspection focuses on critical components including the valve body, dual plates, shaft assembly, and sealing surfaces.

Material & Component Inspection
Material identification and certificates are checked for pressure-containing parts such as valve bodies, discs, and shafts to maintain material traceability.

Machining & Dimensional Inspection
Key dimensions including flange connections, disc alignment, shaft position, and sealing surface tolerances are inspected against approved drawings.

Assembly Inspection
The dual plate mechanism, spring assembly, shaft movement, and sealing contact areas are checked during assembly to verify disc movement and closing performance.

Pressure & Leakage Testing
Hydrostatic testing verifies body strength, while seat leakage testing checks sealing performance of the dual plate assembly.

Final Inspection & Documentation
Inspection records, pressure test reports, and material certificates can be provided according to project requirements.

Butterfly check valves are produced through controlled manufacturing procedures including:

• Raw material inspection
• Casting or forging verification
• CNC machining of body and disc components
• Assembly inspection
• Hydrostatic pressure testing
• Leakage testing
• Final dimensional inspection
• Export packaging

Each valve is inspected before shipment according to project requirements.

Highly Experienced
Since 1997, PORO has manufactured industrial valves for water treatment, power generation, oil & gas, and industrial process applications. Our experience covers valve machining, assembly, pressure testing, inspection, and export preparation for international projects.

Quality Control & Inspection
Quality control covers incoming material checks, dimensional verification, machining checks, assembly inspection, and final product inspection before shipment.

Comprehensive Valve Manufacturing Range
Manufacturing capabilities cover check valves and other industrial valves including gate valves, globe valves, ball valves, butterfly valves, slab gate valves, and forged valves.

Multi-Material & Standard Capability
Supporting carbon steel, LTCS, stainless steel, duplex stainless steel, and alloy steel production according to ANSI, DIN, BS, JIS, and GB requirements.

Valve Protection During Transportation
Valves are protected with flange covers, sealing surface protection, and internal cleaning to prevent damage and contamination during shipment.

Internal Component Protection
Discs, shafts, and sealing areas are protected to maintain product condition during handling and transportation.

Export Wooden Case Packaging
Valves are packed in suitable wooden cases or customized export packages according to valve size and shipment requirements.

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