Concentric Butterfly Valve

Product Introduction

LYV® Concentric Butterfly valve is manufactured to the highest standards, backed by our commitment to quality and excellence. We use advanced manufacturing processes and rigorous quality control to ensure each valve meets or exceeds industry benchmarks. Our valves are of exceptional quality, surpassing similar products in the industry in terms of durability, performance, and reliability. Our castings are of high quality, achieved through the use of superior materials and advanced techniques.Our butterfly valves are meticulously crafted and adhere to rigorous production standards. Our sales team is dedicated to providing personalized service, and we will customize a concentric butterfly valve solution to meet your specific requirements and intended application.

Specifications

Size Range:

NPS 2”-48”; DN50-DN1200

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:

VITON/NBR/EPDM

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

■ Compact Size and Lightweight

■ Easy Maintenance

■ Cost-Effective

■ Flexible Control

What is Concentric butterfly valve:

Butterfly valve is a type of quarter-turn valve that controls the flow of water by turning a lever or rotor on top of the valve. The most commonly used type is the concentric butterfly valve, also known as a zero-bias butterfly valve, where both the stem and the disc are located in the center of the valve body. It uses a rotating disk to control the flow of media, resulting in less resistance due to the thinness of the disc.

How does it work(sealing):

Concentric butterfly valve operates by adjusting the opening angle of the valve disk to control the flow of the medium. When the disk is parallel to the flow path, the medium can pass through unobstructed, and the valve is fully open. When the disk is perpendicular to the flow path, it completely blocks the flow, and the valve is fully closed. By rotating the valve stem, you can vary the disk's angle, thereby regulating the flow rate. In the closed position, the disk's edge presses tightly against the sealing ring on the valve body's inner wall. The elastic deflection of the sealing ring creates a seal, preventing leakage of the medium.

Why choose LYV®️ valves:

We produce concentric 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.