China Lug Butterfly Valve Manufacturer | Lug Style Butterfly Valve

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DN250 Manual Gear Hard Back Seat Pin Lug Butterfly Valve

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DN400 PN10 Gear OP EPDM Seat Two Shaft Lug Butterfly Valve

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Ductile Iron Body&Disc EPDM Seat Lug style Butterfly Valve

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EPDM Seat DI Lug Butterfly Valve with Worm Gear

Composition of Lug Butterfly Valve

Lug Butterfly Valve Dimensions

1. Face to Face(FTF) Dimension (20 Series)

DN	40	50	65	80	100	125	150	200	250	300	350	400	450	500	-500	600	-600	700	750	800	900	1000	1200	1400	1600	1800	2000
FTF	33	43	46	46	52	56	56	60	68	78	78	102	114	127	154	154	165	165	190	190	203	216	254	279	318	356	406

2. Pressure

Pressure range:

ISO, DIN, EN, BS standard: PN6/PN10/PN16/PN25
ASME standard: Class 125/150(150lb)

Note:

DN≤300，the connecting holes of PN10 and PN16 are common.

wafer butterfly valve pressure dimensions

Lug Butterfly Valve Types

1. Structure

Concentric type
Eccentric type, including single eccentric, double eccentric and triple eccentric

2. Valve seat

--Soft Seal--

Hard-Back Seat:

The material is composed of a hard backrest wrapped with rubber on the outside. The installation method is to use a professional valve assembly platform to press the valve seat into the valve body through a machine. At the same time, the valve seat is also classified into ordinary type and waterline type.

Soft-Back Seat:

The entire material is composed only of rubber, so it is highly elastic and is also called a backless valve seat. Its installation method is more convenient for workers to repair, replace and disassemble later.

Vulcanization:

The rubber lining in the rubber-lined butterfly valve uses high temperature to vulcanize the rubber and the valve body into one body. This valve seat has very high anti-corrosion properties and is generally used to control some corrosive fluids with strong acid and alkali. The disadvantage is that the valve is disposable and if the vulcanized valve seat is damaged, the entire butterfly valve needs to be replaced.

--Hard Seal--

Eccentric type, use body seal or other metal materials such as stainless steel, bronze, graphite etc.

Producing Process of Butterfly Valve Parts

Valve Body of Butterfly Valve

Valve Disc of Butterfly Valve

Soft-backed Seat of Butterfly Valve

Why Choose Us

OEM Service

We have already provided OEM service for tens of famous customers worldwide. We can provide butterfly valves and valve parts such as the body, seat, disc, and hand lever.

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Technical Support

Installation issues: The more detailed the installation environment provided before the inquiry, the more accurate the product recommendations and installation suggestions can be.

Troubleshooting: We have the skills and knowledge to analyze, diagnose, and solve problems encountered when using valves.

Maintenance: Regular maintenance and repairs (such as cleaning, inspection, and lubrication of valve parts, etc.) performed by professionals can reduce operating costs. If problems need to be repaired, please contact us. We will provide professional maintenance manuals and remote guidance.

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Valve Warranty

Subject to the conditions and limitations in the warranty, the product is guaranteed to be free from manufacturing errors within 12 months from the date of initial installation or 18 months from shipment defects caused by it.

You should report defects and faults to us within 30 days after the fault occurs. If there is no incorrect installation, irregular operation, use environment not as expected, etc., we will ship free replacement spare parts or the same quantity as the faulty product.

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Lug Butterfly Valves Certificate

We are proud of the quality of the Lug Butterfly Valves we produce. Superior product quality is our most outstanding advantage. ZFA Valve is committed to consistently providing you with high quality Butterfly Valve products.

Several authoritative third party organisations have issued product quality certificates for ZFA Valve.

FAQs

Here are short answers to frequently asked questions about our products and services.

Are you a Lug Butterfly Valve Factory or Trading?

We’re a factory with 17 years production experience, OEM for some customers around the world. You dears can design your own Logo, Packaging etc.

How does a lug butterfly valve differ from a wafer butterfly valve?

The main difference is the connection design. A lug butterfly valve has threaded inserts, called lugs. They allow for bolting to the pipe flanges on either side, lets one side of the pipe be disconnected without affecting the other side. In contrast, a wafer butterfly valve is sandwiched between two flanges without lugs.

What are the typical applications for lug butterfly valves?

Lug butterfly valves serve many industries. Water and wastewater treatment, oil and gas, chemical processing, and HVAC systems.

Can a lug butterfly valve be used for bidirectional flow?

Yes, lug butterfly valves can control bidirectional flow. They can control the flow of fluids in both directions.

What are the advantages of a lug butterfly valve?