Worm Gear Grooved Butterfly Valve

The Worm Gear Grooved Butterfly Valve is designed with a worm gear actuator and grooved connection structure, providing easier operation for medium and large diameter pipelines. Compared with manual lever operated valves, this valve offers higher torque output, stable opening control, and self-locking performance, making it suitable for fire protection systems, HVAC pipelines, municipal water treatment, pump station pipelines, and industrial water applications.

Worm Gear Drive Performance

Reduced Operating Torque

The worm gear mechanism converts manual handwheel rotation into higher output torque, allowing operators to control larger diameter valves with less effort.

This design is especially suitable for pipeline systems where high operating torque is required due to larger valve sizes, higher pressure differences, or frequent maintenance operations.

The worm gear transmission structure provides smoother operation compared with direct manual operation, reducing the risk of operating difficulty caused by pressure fluctuation.

Self-Locking Valve Position

The worm gear actuator features a self-locking function that helps maintain the butterfly disc position during operation.

This prevents unexpected disc movement caused by medium pressure impact or pipeline vibration, improving system stability and operational safety.

The integrated position indicator allows operators to clearly identify the valve opening status during commissioning and maintenance.

Grooved Pipeline Connection

Fast Installation Method

The grooved connection design allows the valve to be installed through grooved couplings without welding or flange alignment.

This reduces construction procedures and improves installation efficiency for large pipeline projects, especially in fire protection systems, pump rooms, and municipal engineering applications.

The connection method also simplifies future maintenance because the valve can be removed without cutting the pipeline.

Pipeline Stress Compensation

The flexible grooved coupling connection can absorb minor pipeline displacement caused by thermal expansion, vibration, and installation deviation.

This helps reduce stress concentration in pipeline systems and improves long-term operation reliability.

The feature is valuable for HVAC circulation systems, pump station pipelines, and large water supply networks.

Structural Design And Sealing

Centerline Soft Seal Structure

The Worm Gear Grooved Butterfly Valve adopts a centerline soft-seated structure with EPDM or NBR sealing materials. The valve provides reliable bidirectional sealing performance and low flow resistance when fully opened.

This design is suitable for clean water, fire water, HVAC circulating water, and municipal water treatment applications.

Corrosion Resistant Body

The valve body is manufactured with QT450 ductile iron and coated with internal and external epoxy coating according to ANSI/AWWA C550 requirements.

The coating improves corrosion resistance in humid environments such as underground pump rooms, mechanical rooms, and outdoor pipeline systems.

The stem adopts stainless steel material to improve durability and reduce leakage risks during long-term operation.

Product Parameters

Product Drawing

Application Selection

Fire Protection Systems

The Worm Gear Grooved Butterfly Valve is widely used in fire sprinkler systems, fire hydrant pipelines, fire pump room pipelines, and fire water supply networks.

For fire protection projects, the D381X-16Q configuration with EPDM seat and QT450 ductile iron body is commonly selected.

The grooved connection improves installation efficiency, while the worm gear operation provides stable control for larger pipeline sizes.

For systems requiring monitoring functions, LIANGFA can provide signal feedback versions with open and close status transmission for fire alarm linkage.

HVAC Water Circulation

The valve is suitable for chilled water and cooling water circulation systems in central air conditioning projects.

Its compact structure reduces installation space requirements, while the worm gear mechanism provides smoother operation for larger pipeline sizes.

The grooved connection also helps reduce installation difficulty in equipment rooms and narrow pipeline spaces.

Municipal Water And Pump Stations

The valve is commonly applied in municipal water treatment systems, pump station pipelines, and water supply networks. The stable transmission structure allows reliable shut-off and flow adjustment functions under long-term operating conditions.

The valve is suitable for systems requiring frequent maintenance, pipeline isolation, and reliable operation.

Flow And Operation Performance

Operating Torque Comparison

The worm gear structure significantly reduces manual operating force compared with direct lever operation.

Actual operating torque depends on pressure difference, sealing material, medium condition, and installation environment.

Valve Type Comparison

Material Options

Standard Configuration

For common water applications, LIANGFA recommends QT450 ductile iron body, EPDM seat, ductile iron disc, and stainless steel stem configuration.

This combination provides stable sealing performance and corrosion resistance for fire protection and water circulation systems.

Special Working Conditions

For different operating environments, customers can select alternative materials. SS304 and SS316 components are available for improved corrosion resistance.

NBR sealing is suitable for oil-containing media, while FKM and PTFE solutions can be selected for special temperature or chemical requirements.

Quality Manufacturing

Certified Production Process

LIANGFA follows the GB/T19001-2016 / ISO9001:2015 quality management system during product design, manufacturing, inspection, and delivery.

Each valve is manufactured under strict quality procedures to ensure stable performance and consistent reliability.

Factory Testing

Before shipment, every valve undergoes professional inspection including material verification, pressure testing, sealing performance checks, and appearance inspection.

LIANGFA also provides technical documents, export packaging, and customer support for international projects.

Factory Tour

Product Packing & Shipping

We provide delivery services covering sea freight and land transport, with cargo available for shipment to all major ports worldwide.

Maintenance And Service

Easy Pipeline Maintenance

The grooved connection allows faster valve replacement and maintenance compared with traditional flange connection systems.

During repair work, operators can disconnect the coupling and remove the valve without cutting the pipeline.

Technical Support

LIANGFA provides complete support including product selection guidance, customized material solutions, technical consultation, spare parts supply, installation assistance, and after-sales service.

The company helps customers maintain reliable valve performance throughout the product service life.

FAQ

What Is A Worm Gear Grooved Butterfly Valve Used For?

The valve is mainly used for fire protection systems, HVAC circulation pipelines, municipal water treatment systems, pump station pipelines, and large water supply projects.

Why Choose Worm Gear Operation Instead Of Lever Operation?

Worm gear operation provides higher output torque and easier control for larger diameter valves. It is recommended for applications where manual lever operation becomes difficult due to valve size or pressure conditions.

Can This Valve Be Used For Flow Adjustment?

The valve can provide basic flow regulation through disc position adjustment, but it is mainly designed for shut-off and isolation applications.

What Certifications Does LIANGFA Have?

LIANGFA operates according to the GB/T19001-2016 / ISO9001:2015 quality management system to ensure consistent product quality and manufacturing control.