Double Eccentric Butterfly Valve

Technical Data

Size range	Body Material
Flange type:2"~120"(DN50~DN3000)	Cast iron, Ductile Iron, Carbon Steel, Stainless Steel Al-bronze etc.

Temperature range	Stem Material
-14°F to 176°F (-10°C to 80°C)	Stainless Steel, Monel K500

Pressure ratings

Disc Material

360 psi (25Bar)

150 psi (10 Bar)

Ductile Iron, Stainless Steel Al-bronze etc.

Shuttoff ratings	Seat Material
Bidirectional Bubble-tight	Stainless Steel overlaid

Disc Seal	Retain Ring
Natural Rubber EPDM, NBR	Stainelss Steel

Design & Manufacturing	Face to Face
API 609, EN593, JISB2032, GB/T12238, AWWAC504	API 609, EN558, JISB2002, GB/T12221, AWWAC504

End Connection

Test & Inspection

ASME B16.1 Class 125, ASME B16.5 Class 150,

EN 1092 PN10, PN16, GB/T 17241, GB/T 9113,

JIS B2220

MSS SP-61, API 598, EN 12266-1,JIS B2003, GB/T13927

Features and Benefits

A double eccentric butterfly valve is a type of valve designed to regulate and control the flow of fluid within a pipeline. Its name comes from its two unique characteristics: the first eccentricity of the valve occurs between the valve stem and disk, while the second is achieved through tilting the shaft to allow for an open position. This design results in reduced wear on the valve seat, lower operating torque, and a tight shutoff capability to prevent fluid leakage.

Design

^Huanqiu double eccentric butterfly valves disc design and sealing through elastomer seals fixed to the disc for optimum tightness and allowing seal maintenance without disassembling the valve. Its soft seal option provides excellent sealing capabilities in both directions which delivers excellent shut-off against applications. Rugged fabricated construction, available in a wide range of sizes and special materials to match specific requirements and depending on the head under which the valve will operate. It may be equipped with by-pass for pressure balancing and a counterweight for emergency shutoff.

Huanqiu double eccentric butterfly valves (AWWAC 504 butterfly valve) are compatible with the standard AWWA C504 fully. Robust design in all respects of body, shaft and disc with streamlined low head loss anti flutter contour, it is designed with tilted and fixated disc for extended service life and easy operation. The disc seal is made of drinking water approved EPDM rubber featuring an excellent compression set and thus ability to regain its original shape. The epoxy coating and the corrosion protected shaft end zones ensure high durability.

A BODY: Heavy duty body, Double eccentric type.
B SEAT: Stainless Steel overlaied.
C DISC: The disc is fixated to prevent wear and fluttering.
D SEAL RING: The disc seal profile and rubber quality ensure low closing torques and Bidirectional sealing.
E RETANIER: Stainless steel to ensure the seal is perfect.
F BUSHING: To low operating torques.
G STEM: Stainless Steel.
H O-RING: Replaceable shaft sealing with an EPDM O-ring on a stainless steel ring.
I ACTUATOR: Available with penumatic,hydraulic, electric or manual actuator.

Download catalogue here

Home Page ꄲ Butterfly Valve ꄲ Double Eccentric Butterfly Valve