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Lug Type Butterfly Valve
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Chine (Rép. pop) Cuir / Chaussures
Cuir / Chaussures

Lug Type Butterfly Valve

Lug type valve has simple structure, small volume, light weight, and has good fluid control characteristics. Its disc is installed in the diameter direction of pipeline, so the valves can be quickly opened and closed by rotating its disc 90 degrees.

The wafer body is easy to be connected between two pipeline flange with flange bolts, and it can be used at end in a fluid system,when installed with the seat retainer plate on the pressure side(API 609)

Lug style butterfly valve designed to comply with MSS SP-67, BS5155 and API 609. Compatible with GB, ANSI, DIN, BS, JIS flanges. Available in size 1½″ to 48″. Available with handles (1½″ to 12″), manual gear operators (1½″ to 48″), and electric or pneumatic actuators (1½″ to 48″). With many body/trim combinations, Lug butterfly valve can meet your application.
Lug Type Butterfly Valve Dimensions
Item Part Name Materials
1 Body Cast Iron: ASTM A126CL. B , DIN1691 GG25, EN 1561 EN-GJL-200; GB12226 HT200;
Ductile Cast Iron: ASTM A536 65-45-12, DIN 1693 GGG40, EN1563 EN-GJS-400-15, GB12227 QT450-10;
Stainless Steel: ASTM A351 CF8, CF8M; CF3, CF3M;
Carbon Steel: ASTM A216 WCB
2 Stem Zinc Plated Steel;
Stainless Steel: ASTM A276 Type 316, Type 410, Type 420; ASTM A582 Type 416;
3 Taper Pin Stainless Steel: ASTM A276 Type 304, Type 316; EN 1.4501;
4 Seat NBR, EPDM, Neoprene, PTFE, Viton;
5 Disc Ductile Cast Iron (Nickel plated): ASTM A536 65-45-12, DIN 1693 GGG40, EN1563 EN-GJS-400-15, GB12227 QT450-10;
Stainless Steel: ASTM A351 CF8, CF8M; CF3, CF3M; EN 1.4408, 1.4469; 1.4501;
AL-Bronze: ASTM B148 C95400;
6 O-Ring NBR, EPDM, Neoprene, Viton;
7 Bushing PTFE, Nylon, Lubricated Bronze;
8 Key Carbon Steel
Lug Type VS Wafer Type
1. Material (Similarity):
The valve (Lug Type and Wafer Type) is made of cast iron, ductile iron, cast steel as well as stainless steel
2. Design Pressure (Similarity):
The valve (Lug Type and Wafer Type) has low pressure, DIN PN10/16, ASTM CL125/CL150, JIS 5K/10K
3. Range of Applications:
Both Lug and wafer are used in a number of applications for industrial sectors that include food processing, pharmaceutical, chemical, oil, gas, water as well as wastewater management.
4. Installation (Similarity and Difference):
The wafer valve is designed to be clamped between two flanges. And the Lug valve can be installed on the piping by threaded bolts or flanges.

5. Action:

Both Lug and water valves can adjust (1/4-22.5°, 1/2-45°) and close the flow. And this two kinds can be installed with electrical actuator for more convenience.

6. Alternative:

This wafer type can be replaced by lug type in using, but the opposite is not true.

Lug Type Butterfly Valve FAQ

How Do You Install a Lug Type Butterfly Valve?

Putting the butterfly valve in the middle of the two flanges which fully welded to both ends of the pipe and locking the butterfly valve through the pipe flange with double head bolts, it should always be installed concentrically between flanges, position disk in the closed position during installation to prevent damage of disc sealing edge, Try the disc by moving it from the closed position to open and back to ensure it moves flexibly.

How Does a Lug Type Butterfly Valve Work?

Butterfly valve is a kind of valve using valve handle to open and close, the handle connects the stem ,the round disc of butterfly valve connects the stem, which rotates to drive the valve plate to open and close and regulate fluid.

What is the Construction of the Lug Type Butterfly Valve?

The constructions of the Lug type butterfly valve mainly are body, disc, stem, and seat, and its driving device.

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Lug Type Butterfly Valve

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