Worm Gear Butterfly Valve

Reliable worm gear butterfly valve for water systems. Features bidirectional sealing, wear-resistant seat, and easy manual operation. Sizes DN300–DN1800.

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Cast Iron Valve

Butterfly Valve

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Product details

Worm Gear Butterfly Valve (Model: BV124)

Introduction

A worm gear butterfly valve is a type of quarter-turn valve where a disc rotates to control the flow of water. The worm gear mechanism allows precise manual operation with minimal effort, ideal for large-diameter pipelines.

Working Principle

The valve operates by rotating a disc via a worm gear assembly. Turning the handwheel moves the worm shaft, which rotates the valve disc inside the flow path. This setup offers torque multiplication, making it easier to open or close the valve smoothly, even under pressure.

Technical Specifications

● Nominal Diameter (DN): DN300–DN1800
● Pressure Rating: PN10 / PN16
● Temperature Range: 0℃ – 80℃
● Medium: Water
● Standards: Flanged; GB / ANSI / JIS

Key Features

● Bidirectional sealing ensures reliable shutoff from both directions.
● Vulcanized seat integrated into the body offers enhanced wear resistance and sealing longevity.
● Disc options: ductile iron, stainless steel, or aluminum bronze.

Nominal Caliber Dimensions (Unit: mm)

DN	A	B	b	D	d	F	L
DN350	273	332	21	520	330	152	78
DN400	317	363	28	580	381	154	102
DN450	346	397	25.5	640	416	210	114
DN500	382	437	32.5	715	479	210	129
DN600	445	498	37	840	570	300	156
DN700	513	581	39.5	910	673.5	300	165
DN800	568.5	630	43	1025	774.5	300	190
DN900	617	696	37	1120	861	300	203
DN1100	760	840	43	1405	1073	350	216
DN1200	810	905	41	1480	1152	350	254
DN1300	910	970	65	1630	1256	410	280
DN1400	970	1025	65	1680	1348	475	280

Q&A

● Can the valve be installed in both directions?
Yes, the bidirectional sealing design allows the valve to be installed in either flow direction without leakage concerns.
● Is the worm gear butterfly valve suitable for seawater or chemical applications?
This model is for clean/fresh water. Stainless steel or aluminum bronze discs resist corrosion better, yet still need special coating for highly corrosive media.

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