Triple Offset Butterfly Valve

Description

1. General functions

Butterfly valve is a type of regulating valve with a simple structure, mainly used for switching control of low-pressure pipeline media, and can also be used for throttling. The working principle of a butterfly valve is to achieve opening and closing by rotating a disc shaped butterfly plate around the valve shaft. The design of this valve enables it to control the flow of various types of fluids, including air, water, steam, corrosive media, mud, oil, liquid metals, and radioactive media. Butterfly valves mainly play a cutting and throttling role in pipelines. Their opening and closing components are a disc-shaped butterfly plate that rotates around its own axis inside the valve body, thereby achieving the purpose of opening, closing or adjusting.

2. Eccentric butterfly valves

Single eccentric:

stem deviated from valve body center

Double eccentric:

1st eccentric: stem deviated from valve body center

2nd eccetric: stem deviated from seat center

Triple eccentric:

1st eccentric: stem deviated from valve body center

2nd eccetric: stem deviated from seat center

3rd eccentric: the center of taper angle of seat deviated from the the valve center

3. Applied standards

Butterfly valve designing as per API 609

Cast steel valves as per ASME B16.34

Face to face as per ASME B16.10

Flange ends

.24" and smaller as per ASME B16.5

.26"and larger as per ASME B16.47 A/B series

Butt-welding ends as per ASME B16.25

Inspection and test as per API 598/API 6D

Operating methods:Handle,Worm gear, pneumatic and electric actuator

4. Specifications

NPS 2"-128",

Class: 150LB-250LB

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