Butterfly Valve

Your Reliable Butterfly Valve Supplier

Butterfly valves are quarter-turn flow control devices designed for efficient shut-off and regulation in water supply, fire protection, and industrial systems, offering compact structure, fast operation, and reliable sealing performance.

General Technical Specifications

Parameter	Specification
Size Range	DN50 – DN300 (2” – 12”)
Pressure Rating	PN10 / PN16 / PN25 (up to 25 Bar)
Connection Type	Wafer / Lug / Grooved / Flanged
Body Material	Ductile Iron QT450-10 / Cast Iron
Disc Material	Ductile Iron (EPDM coated) / Stainless Steel
Stem Material	2Cr13 Stainless Steel / 304 Stainless Steel
Seat Material	EPDM / NBR
Coating	FBE Coating ≥ 250 μm / Epoxy Coating (Fire Protection)
Applicable Media	Water, non-corrosive fluids
Operating Temperature	0°C – 80°C
Standards	ANSI / DIN / BS

Butterfly Valve Wafer Type Gear Operated

Key Features

Compact & Lightweight Design
Short face-to-face length and reduced weight minimize installation space and structural load, especially in large-diameter pipeline systems.

Low Torque, Efficient Operation
Optimized disc and seat design reduce operating torque, enabling easy manual or actuator-driven operation.

Fast Quarter-Turn Control
90-degree rotation enables quick open/close action, suitable for systems requiring rapid shut-off or frequent operation.

Product Types

Wafer Type Butterfly Valve
Compact design installed between flanges, suitable for general water systems and space-limited applications.

Lug Type Butterfly Valve
Allows end-of-line service and easy maintenance without disturbing the pipeline system.

Grooved End Butterfly Valve
Designed for quick installation in fire protection and HVAC piping systems.

Fire Protection Butterfly Valve
Specially designed for fire sprinkler systems, typically with red epoxy coating and compliance requirements.

Customization Options

We provide flexible OEM & ODM solutions for different project and market requirements:

Customized valve size and pressure rating

Optional stainless steel stems, bolts, and fasteners

Special coating requirements (FBE thickness, fire protection coating)

Connection standards based on regional markets

Branding, marking, and packaging customization

Quality & Compliance

Manufactured under ISO 9001 quality management system

Pressure and sealing performance tested before delivery

Coating thickness and adhesion testing (FBE / epoxy)

Material traceability for key components

Compliance with international standards (ANSI / DIN / BS)

Optional third-party inspection (SGS, BV, Intertek)

Packaging & Logistics

Standard export packaging (wooden cases, plywood boxes, or pallets)

Anti-corrosion and moisture-proof protection during transit

Flexible shipping options (sea, air, express)

On-time delivery support aligned with project schedules

FAQ

Q: What is the primary operational advantage of choosing a Lug Type butterfly valve over a Wafer Type?

A: Lug type butterfly valves feature threaded metal inserts surrounding the bolt holes, allowing them to be bolted directly to one flange without disturbing the opposite side. This mechanical structure enables end-of-line service and dead-end piping maintenance safely while the upstream system remains pressurized.

Q: How does the two-piece stem design improve the flow performance of your butterfly valves?

A: By utilizing an engineered split-stem or two-piece shaft design rather than a full-length single bar through the center, the cross-sectional profiling of the disc is minimized. This directly expands the net flow capacity (Cv value) of the valve and significantly reduces fluid turbulence across the seat.

Q: Are your fire protection butterfly valves equipped with internal supervisory tamper switches?

A: Yes. Our fire protection butterfly valves can be ordered with factory-configured, built-in dual supervisory tamper switches. These electrical switches detect manual adjustment or unauthorized closure of the valve, instantly transmitting an alarm signal to the centralized building fire control panel in strict compliance with life-safety regulations.

Q: Can we request Mill Test Reports (MTR) and coating thickness inspection logs for municipal submittals?

A: Absolutely. Driven by our material traceability and ISO 9001 quality parameters, we supply complete technical documentation upon request. This includes chemical composition analysis reports for the Ductile Iron QT450-10 bodies, hydrostatic shell/seat test reports, and dry film thickness (DFT) logs for the FBE coatings

We're known as one of the most professional butterfly valve manufacturers and suppliers in China, also support customized service. We warmly welcome you to buy high quality butterfly valve made in China here from our factory. If you have any enquiry about cooperation, please feel free to email us. 8 Inch Butterfly Valve, Butterfly Valve 4 Inch, Ductile Iron Butterfly Valve