OEM Worm Gear DI Body Lug Type Butterfly Valve Manufacturers, Exporter

Worm Gear also called gearbox or hand wheel in butterfly valve. Ductile Iron body lug type butterfly valve with worm gear is common used in water valve for pipe. From DN40-DN1200 even larger lug type butterfly valve, we also can use the worm gear to open and close the butterfly valve. Ductile Iron body is suitable for a wide range of medium.Such as water, wast water,oil and etc. 

Product Description

16 years valve manufacturing experience
Small size, light weight and easy maintenance. It can be installed wherever needed.
Simple and compact structure, 90-degree quick switch operation.
The flanged butterfly valve disc has two-way bearings, good sealing and no leakage during pressure test.
The flow curve tends to be straight. Excellent adjustment performance.
Can be used to cut and condition media with efficient control.
The lug valve has good fluid control performance and is easy to operate.
Inspection & Testing Specifications
Body Test: 1.5 times the working pressure of water. The test is carried out after the valve is assembled, and the valve disc is in the half-open position, which is called the valve body hydraulic test.
Seat Test: Water at 1.1 times the working pressure.
Functional/Operational Test: At final inspection, each valve and its actuator (flow lever/gear/pneumatic actuator) undergo a complete operational test (open/close). The test is performed without pressure and at ambient temperature. It ensures proper operation of the valve/actuator assembly, including accessories such as solenoid valves, limit switches, air filter regulators, and more.
Industrial Applications

The lug valve is mainly used for pipeline flow, pressure and temperature control in various industrial automation production, such as: electric power, petrochemical, metallurgy, environmental protection, energy management, fire protection system and butterfly valve sales.

They are not only widely used in general industries such as petroleum, gas, chemical, water treatment, etc., but also in the cooling water system of thermal power plants.

Technical Parameters
Size & Pressure Rating & Standard
Size DN40-DN1600
Pressure Rating PN10, PN16, CL150, JIS 5K, JIS 10K
Face to Face STD API609, BS5155, DIN3202, ISO5752
Connection STD PN6, PN10, PN16, PN25, 150LB, JIS5K, 10K, 16K, GOST33259
Upper Flange STD ISO 5211
Material
Body Cast Iron(GG25), Ductile Iron(GGG40/50), Carbon Steel(WCB A216), Stainless Steel(SS304/SS316/SS304L/SS316L), Duplex Stainless Steel(2507/1.4529), Bronze, Aluminium Alloy.
Disc DI+Ni, Carbon Steel(WCB A216), Stainless Steel(SS304/SS316/SS304L/SS316L), Duplex Stainless Steel(2507/1.4529), Bronze, DI/WCB/SS coated with Epoxy Painting/Nylon/EPDM/NBR/PTFE/PFA
Stem/Shaft SS416, SS431, SS304, SS316, Duplex Stainless Steel, Monel
Seat NBR, EPDM/REPDM, PTFE/RPTFE, Viton, Neoprene, Hypalon, Silicon, PFA
Bushing PTFE, Bronze
O Ring NBR, EPDM, FKM
Actuator Hand Lever, Gear Box, Electric Actuator, Pneumatic Actuator
Product Gallery
Our valves are compliance with valve international standard of ASTM, ANSI, ISO, BS, DIN, GOST, JIS, KS and so on. Size DN40-DN1200, nominal pressure: 0.1Mpa~2.0Mpa, suitable temperature:-30℃ to 200℃. The products are suitable for non-corrosive and corrosive gas, fluid, semi-fluid, solid, powder and other medium in HVAC, fire control, water conservancy project, water supply and drainage in urban, electric powder, petroleum, chemical industry, and so on.
Frequently Asked Questions (FAQ)
Q: Which international standards do these valves comply with?

The valves comply with a wide range of international standards including ASTM, ANSI, ISO, BS, DIN, GOST, JIS, and KS. Face-to-face standards cover API609, BS5155, DIN3202, and ISO5752.

Q: What pressure testing procedures are conducted on these valves?

Each valve undergoes a hydraulic body test at 1.5 times the working pressure with the disc half-open, a seat test at 1.1 times the working pressure, and a comprehensive functional open/close operational test including actuator verification.

Q: What is the operating temperature and pressure range?

The valves operate within a nominal pressure range of 0.1Mpa to 2.0Mpa (covering PN10, PN16, CL150, JIS 5K, JIS 10K) and perform reliably at temperatures between -30°C and 200°C depending on material configuration.

Q: What actuation options are available?

Valves can be configured with manual hand levers, gearboxes, electric actuators, or pneumatic actuators, featuring standard ISO 5211 upper flange mounting for seamless automation integration.

Q: What media and industries are these valves suitable for?

They are engineered for non-corrosive and corrosive gases, fluids, semi-fluids, solids, and powders across sectors including HVAC, fire control, municipal water systems, petrochemical, thermal power cooling systems, and metallurgy.

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