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Home / Products / Fire Product / Fire pipe fittings / Grooved Worm‑gear Butterfly Valve, Ductile Iron Fire Butterfly Valve for Fire Protection System

Grooved Worm‑gear Butterfly Valve, Ductile Iron Fire Butterfly Valve for Fire Protection System

This grooved worm‑gear butterfly valve is ordinary fire‑protection isolation valve without signal feedback function. Ductile iron body adopts red epoxy anti‑corrosion coating. Grooved ends match fire grooved pipe fittings for fast welding‑free installation. Worm‑gear drive realizes labor‑saving manual operation, opening degree can be read from gear box scale. EPDM soft seat guarantees reliable bidirectional sealing.  it is widely used for full‑open/full‑close isolation on fire‑fighting pipelines of commercial buildings, factories and large public projects.
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Product Description

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Item

Parameter

Model

XD381X‑16Q

Body Material

Ductile Iron

Seal Material

EPDM Rubber Seat

Drive Type

Worm‑gear handwheel operation

Connection Type

Grooved End

Nominal Pressure

PN16

Applicable Media

Fire‑fighting water

Working Temperature

0℃ ~ 80℃

Size Range

DN50‑DN300

Design & Technical Characteristics

  • Corrosion-Shielded Iron Body: Molded from high-tensile ductile iron and coated in a protective red epoxy finish, fully compliant with global fire-safety coating guidelines.

  • Grooved Pipeline Joint: Engineered with standard grooved ends for rapid, gasket-tight clamping without the need for on-site welding or custom flange alignment.

  • Torque-Amplifying Gear Drive: Integrated worm-gear gearbox significantly reduces operating effort, enabling smooth quarter-turn control on high-capacity lines.

  • Direct Visual Position Tracking: Built with a simple, non-electric gear box indicator scale for immediate on-site visual monitoring of the valve's open/close status.

  • Zero-Leakage EPDM Sealing: Molded resilient EPDM seat delivers consistent bi-directional tightness under prolonged static line pressure.

Core Operational Advantages

  • International Code Readiness: Manufactured to meet strict structural and functional criteria for overseas fire protection system approvals.

  • Rapid & Flame-Free Assembly: Grooved end geometry dramatically speeds up header installation, slashes labor costs, and simplifies future maintenance.

  • Mechanical Reliability: Streamlined manual layout without electronic signal modules lowers failure points, ensuring long-term operational dependability.

  • Low-Profile Architecture: Lightweight, space-efficient housing easily fits inside tight utility shafts, drop ceilings, and restricted valve closets.

Primary Application Areas

  • Automatic wet/dry fire sprinkler mains

  • Commercial complex and high-rise public safety headers

  • Industrial plant and warehouse fire suppression networks

  • Underground parking structures and basement supply loops

  • Large-scale municipal and infrastructure fire protection projects

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Precision Valve Manufacturing

Professional Valve Manufacturer | Integrated Manufacturing

Raw Material Inspection

We select high-quality raw materials according to product specifications and international standards. All incoming materials are carefully inspected to ensure chemical composition, mechanical properties and traceability.

Forging & Casting

Advanced forging and casting processes are used to produce strong and reliable fire hydrant valve bodies and components. Strict process control ensures uniform structure, dimensional accuracy and excellent mechanical performance.

CNC Machining

Our CNC machining equipment provides precise and consistent processing of fire hydrant valve components. Critical dimensions, threads and sealing surfaces are strictly controlled to ensure accurate assembly and reliable sealing performance.

Surface Treatment

fire hydrant valve surfaces are professionally shot blasted to remove rust, scale and impurities. by epoxy powder coating, red fire‑retardant painting or hot‑dip galvanizing for long‑term anti‑corrosion performance.

Pressure Testing

Every fire hydrant valve undergoes strict pressure testing before shipment. Body and seat tests are performed according to applicable standards and customer specifications to verify pressure resistance and sealing reliability.

Quality Inspection

Our quality control team conducts comprehensive inspections throughout the production process. Finished valves are checked for dimensions, appearance, materials, pressure performance and overall quality before final approval and shipment.

What is the difference compare with signal butterfly valve?

This version has no signal feedback switch, cannot transmit electric signal to fire control cabinet.

Can this butterfly valve be used for flow adjustment?

Only for full‑open / full‑close isolation, throttling regulating service is prohibited.

What are the advantages of grooved connection?

No welding required, fast installation, convenient disassembly for maintenance.

For more products, please contact us

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Email: Eileenye@huhang.cn / tina@huhang.cn
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