Triple Offset Butterfly Valve

Product Introduction

LYV®️ Triple offset butterfly valve are manufactured with high standard. We control the quality of the casting to make valves far superior to similar products in the industry. LYV®️ Triple offset butterfly valve use high quality metal + graphite multi-layer sealing ring, which enables the valve to be used under high pressure and high temperature conditions. We also provide different sealing options for different working conditions, such as PTFE or metal-to-metal. LYV®️ Triple offset butterfly valve has a unique design(optional) that allows valve to be under constant pressure from both-side and zero leakage, as known as the bi-directional butterfly valve. For more information, please get contact with our sales.

Specifications

Size Range:

NPS 2”-88”; DN50-DN2200

Nominal Pressure:

150LB-600LB; PN6-PN64

Temperature Range:

-69℃~825℃（depends on design and material）

End Connections:

Flange; Butt-weld; Wafer; Lug-wafer

Body Materials:

ASTM A216 WCB/WCC; ASTM A352 LCB/LCC; ASTM A351 CF8/CF8M/CF3/CF3M; ASTM A890 4A/5A/6A;

Disc Materials:

ASTM A216 WCB/WCC; ASTM A352 LCB/LCC; ASTM A351 CF8/CF8M/CF3/CF3M; ASTM A890 4A/5A/6A;

Sealing Material:

420/304/316+Graphite; PTFE; 304+STL; 316+STL

Seat Materials:

Integral; 304/316/STL overlayweld.

Stem Materials:

ASTM A182 F6A; ASTM A182 F304/F316/F304L/F316L; 17-4PH;

Design & Manufacture Standard:

API 609

Face-to-face Standard:

EN558-1

End Connection Standard:

ASME B16.4

Test & Inspection Standard:

API 598

Features

■ Zero leakage

■ Multi-layer sealing

■ Triple eccentric disc design

■ Bi-directional (optional)

■ Anti-blowout stem design

■ Metal-to-Metal available

■ Large diameter

What is Triple offset butterfly valve:

Triple offset butterfly valve gets its name from the three eccentricities on the sealing design. Unlike traditional butterfly valves, which only have a simple rotation disc to shut-off. Triple offset butterfly valve included three eccentricities to close valve linearly until tightly shut-off. The difference between the centerline butterfly valve and the triple offset butterfly valve lies in the method of achieving sealing. The centerline butterfly valve achieves sealing through the compression of the sealing surfaces, while the triple offset butterfly valve achieves sealing through contact between surfaces. This is what we call the difference between line sealing and face sealing. Therefore, the service life of the triple offset butterfly valve will be better than the traditional concentric butterfly valve.

What are the three eccentricities on triple offset butterfly valve:

The first eccentricity is the valve shaft is positioned offset from the centerline of the valve body.The second eccentricity is the valve shaft is positioned slightly off the perpendicular axis to the plane of the valve seat.The third eccentricity is the sealing surface of the disc is designed in a conical shape that allow the disc to fully disengage from the valve seat without any friction.

Why choose LYV®️ valves:

We produce triple offset butterfly valve for over 30 years. The workshop covers 13000 square meters and own more than 50 advanced CNC machines. Our engineers & production team will make sure your order delivers with high-quality and fastest time. We also care about valve shipping. The valves will wrap by bubble pouches or paper to ensure the paint will not be damaged. We also fixed valve by plywood stick after we put valve into the box. The plywood case will be painted with necessary marking to make sure the valve will not be damaged during shipping.