Focus On Triple Offset Butterfly Valve 


3 Inch high pressure butterfly Triple Offset Valve

Model: D373h-600lb

Origin: Oubei, Wenzhou

Type: Wafer

Specification: 3 inches

Valve Body material: WCB

Valve Disc material: WCB

Valve Stem material: 17-4PH

Sealing Material: SS304 + graphite

Driving Mode: Worm Gear

product details

3 Inch high pressure butterfly Triple Offset Valve is a kind of advanced butterfly valve, which is a three eccentric metal hard seal butterfly valve. The valve body and valve seat are connected components, and the sealing surface of valve seat is overlaid with heat-resistant and corrosion-resistant alloy material. Compared with the traditional butterfly valve, this kind of butterfly valve has the advantages of high temperature resistance, light operation, no friction when opening and closing. When closing, it compensates the sealing with the increase of the torque of the transmission mechanism, improves the sealing performance of the butterfly valve and prolongs the service life.

1、 Structure introduction

API standard butterfly valve adopts three eccentric structure, and the valve seat seal is metal multi-layer hard seal structure, which is usually the interlayer between metal and graphite, such as 304+ graphite and 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 to operate
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 B16.5
Inspection and pressure test: API 598

Any valve produced by our company is 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 sizeStructural lengthDrilling center distanceapertureNumber of flange end holes
600 LBNPS 35416848

4、Material of main parts

Valve Body: WCB
Valve Disc: WCB
Stem: 17-4PH
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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