Double Offset Butterfly Valve

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LYV® Double Offset Butterfly Valve Introduction

LYV double eccentric butterfly valve on the basis of improved molding is currently widely used double eccentric butterfly valve. Its structural characteristics are that the stem axis deviates from the center of the disc and the center of the body. The effect of double eccentricity enables the disc to be quickly removed from the seat after the valve is opened, greatly eliminating the unnecessary excessive extrusion and scratching phenomenon between the disc and the seat, reducing the opening resistance, reducing wear, and improving the life of the seat

LYV® Double Offset Butterfly Valve Parameter (Specification)

Product adoption standard

Structural form

Double eccentric

Design basis

GB

API

Driving mode

Manual, worm gear and worm drive, manual, electric

Design standard

GB/T 12238

API609, MSS.SP-68

Structural length

GB/T12221

ASMEB16.10, API609, MSS.SP-68

Connecting flange

JB/T79, JB/T82, GB/T9115

ASME B16.5, ASME B16.47

Test and inspection

JB/T 9092

API 598

Note: The size of valve connection flange and butt welding end can be designed and manufactured according to user requirements

Main parts material

Serial number

material

material

Serial number

Part name

material

1 Valve body

WCB, CF8, CF8M, CF8C, CF3, CF3M

5 packing

Flexible graphite

2 Valve stem

1Cr13, 2Cr13, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti

6 Packing gland

WCB, CF8, CF8M

3 Butterfly plate assembly

WC+f4, WCB+ stainless steel composite parts

WCB+F6, CF8, CF8M

7 support

WCB, CF8, CF8M, CF3, CF3M

4 Packing pad

2Cr13

8 Worm gear and worm gear

LYV® Double Offset Butterfly Valve Feature And Application

1 Reasonable design, compact structure, easy assembly and disassembly, easy maintenance.

2 Eccentric structure, reduce the friction of the seal ring, prolong the service life of the valve.

3 Completely sealed, zero leakage. It can be used in ultra-high vacuum condition

4 Replace the valve plate seal ring, butterfly plate, rotating shaft and other materials, can be applicable to a variety of media and different temperatures

LYV® Double Offset Butterfly Valve Details