Double Eccentric Butterfly Valve

Name: Double Eccentric Butterfly Valve
Brand: Euro Flow Control
SKU: EFC-327
Availability: InStock

Debug · supplier source (internal only)

Supplier product page ↗EFC datasheet PDF ↗supplier: zd · ref: 327

Specifications

Confirmed at quote

Size Range: DN200-DN4000
Pressure Class: PN10/PN40
Standards: EN 593, BS5155, DIN3354, EN 1092, ASME B16.5, ASME B16.1, AWWA C207, EN 558-1 / ISO 5752 series 14 or series 13, EN1074-1, EN1074-2, EN12266-1, ISO 5210
Face-to-face: EN 558-1 / ISO 5752 series 14 or series 13
Operating temperature: 0 ~ 80 ℃

Available sizes

Standard DN sizes covered by this product. Confirmed at quote.

DN200 DN250 DN300 DN350 DN400 DN450 DN500 DN600 DN700 DN800 DN900 DN1000 DN1200 DN1400

Available pressure classes

Pressure classes this product is rated to.

PN10 PN16 PN25 PN40

Configure your variant(manually adjust box on the right if you require a different spec)

Size
Pressure
End connection

Materials

All available material options per part. Click a pill to set it in the configurator.

body
bonnet
disc
seat
stem
o ring
body seat
bolt
disc seal ring
gear housing
key
lower shaft
packing gland
retainer ring
screw
shaft bearing
shaft cover
taper pin
upper shaft

Operating media

potable watersea waterTSE waterlow-corrosive liquid

Actuation options

manual gearbox + handwheelelectric actuator

Coatings

fusion bonded epoxy coating, min. thickness 300 micron

Approvals

EN1074-1 & EN1074-2 type approvalWRAS

Features

Stainless steel welded and finished body seat for corrosion and wear resistance
Streamlined low-profile disc design verified by finite element analysis for lower flow resistance
Seal gasket at shaft bearing/disc joint, double O-ring on shaft bearing, and closed disc eyes forming dry operating condition for shaft and shaft seal
Anti-blowout shaft design
Disc to shaft connection by taper pin or key (optional)
Self-lubricating bearings in bronze or stainless steel lined PTFE to reduce shaft friction and operating torque; bearings keep disc centred and prevent axial movement
Multiple O-rings in shaft sealing system; O-rings on packing gland and shaft cover replaceable without removing valve from pipeline
Suitable for full vacuum service conditions
T-profiled resilient seal ring secured on disc by retainer ring and bolts; bidirectional sealing; adjustable or replaceable on site without special tools
External locking device on non-drive shaft end to allow gearbox removal with valve in service
ISO 5210 top flange for electric actuator coupling
Fusion bonded epoxy coating internally and externally, 250 micron thickness (other coatings/linings available on request), colour RAL5005/5015/5017
Leakage rate Class A (zero leakage) in both directions per EN 12266-1
100% tested before delivery
Double-flanged end connections
Double-eccentric (triple-offset) disc configuration visible in sectional drawing
Worm gearbox actuator with handwheel
Open/Close indicator on gearbox
18-part numbered sectional assembly (parts 1–18 labelled on sectional diagram)

Notes

Other materials such as carbon steel, st. steel, duplex SS, aluminum bronze are available on request.
Different coating/lining is available as special request.
Disc to shaft connection by means of taper pin or key (optional).
Diagram: Cross-sectional/longitudinal sectional drawing of a double-eccentric (triple-offset) flanged butterfly valve showing internal components numbered 1–18, including gearbox, shaft, disc, seating, and body details (appears twice, images 4 and 8).
Diagram: Two-view general arrangement dimensional drawing showing front elevation and side elevation of a double-flanged butterfly valve with gearbox actuator, referencing dimensions L, H1, H2, H3, E1–E6, L1, D4 (appears twice, images 5 and 9).

Description

A double eccentric butterfly valve designed to EN 593, BS5155, and DIN3354, with a ductile iron body and stainless steel welded body seat. The valve features a T-profiled resilient disc seal ring secured by a retainer ring, anti-blowout shaft design, and self-lubricating bearings. Rated from PN10 to PN40 across a size range of DN200 to DN4000, with fusion bonded epoxy internal and external coating.