Focus On Triple Offset Butterfly Valve 


150lb-48 Inch API Standard Butterfly Lug Type Valve

Model: ltd373h-150lb

Origin: Oubei, Wenzhou

Type: Lug Type

Specification: 48 Inch

Material: WC6

Valve body: WC6

Valve Disc: WC6

Valve Stem : F304

Sealing Material: SS304 + graphite

Driving Mode: Worm Gear

product details

150lb-48 inch API Standard butterfly lug type valve  has simple structure and stable performance. It is widely used in petroleum, gas, chemical industry and water treatment industry, and also used in cooling water system of thermal power station.

1、 Structure introduction

Lug type butterfly valve is also called lug type butterfly valve. American standard convex type butterfly valve adopts three eccentric structure. The valve seat seal is metal multi-layer hard seal structure, which is usually the interlayer of metal and graphite, such as 304 + graphite, 316 + graphite. Such hard seal can also be made into single-layer soft seal PTFE, rptfe, ppl, EPDM, NBR, etc

Three eccentric butterfly valve features:
1. Short structure size, small volume, light weight, easy operation
2. Using the whole shaft mechanism, the butterfly plate has high strength and large flow area
3. The unique three eccentric design reduces the friction loss of the seal and greatly prolongs the service life
4. Metal hard seal is resistant to high temperature, low temperature and high pressure, and has a wide range of applications

2、Relevant standards of API standard butterfly valve

Design and manufacture: API 609
Structural length: API 609
Connecting flange: ASME b16.47 Series B
Inspection and pressure test: API 598

All valves manufactured by our company are pressed in strict accordance with the pressure test standard, and the zero leakage butterfly valve is allowed to leave the factory only after the pressure is qualified.

Shell strengthSealing strength of high pressure waterAir seal strength

Under the above pressure, the zero leakage can be achieved.
Accept the sampling and full inspection of the third party quality inspection unit entrusted by the customer and the end customer, but explain to us in advance

3、Detailed connection size

Nominal pressureNominal specificationStructural lengthDrilling centerFlange hole diameter 
150LBNPS 48276133544 

4、Material of main parts

Valve body: wc6
Butterfly plate: wc6
Stem: f304
Butterfly seal: SS304 + graphite
Bracket: WCB
Worm gear case: QT450

The default bracket is WCB, and the material of worm gear box is QT450. Our company can also produce WCB, CF8 and other materials according to customer demand

5、About our company

Tkok Valve  is a professional high quality butterfly valves manufacturers, focusing on research and development of butterfly valve series products.
The butterfly valves produced by Tkok Valve, both the valve body and valve disc all use designed casting molds by Tkok Valve company,not use the foundry no matter the wall thickness of the valve body,flange thickness and face to face dimensions,all can meet the requirement of relevant standard.
TKOK VALVE mainly produce eccentric butterfly valves,high performance butterfly valves,and also have good supply for the centerline butterfly valves and fluorine-lined butterfly valves.

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