Triple Eccentric Butterfly Valve

Specifications

Confirmed at quote

Size Range: DN50 to DN1600
Pressure Class: Class 150 / PN10 to Class 1500 / PN250
Standards: ASME B16.34, API 609, EN 593, ISO 5752, EN 558, API 598, ISO 5208, EN 12266-1, GOST 9544, ASME B16.5, ASME B16.47, EN 1092, GOST 33259, GB/T 9124, ASME B16.34 (pressure-temperature rating), EN 12516-1 (pressure-temperature rating), ASME B16.25 (butt weld), EN 12627 (butt weld)
End connection: Flanged (double flange) ASME B16.5 / ASME B16.47 / EN 1092 / GOST 33259 / GB/T 9124 · Lug · Butt weld ASME B16.25 / EN 12627 · Socket

Available sizes

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

DN50 DN65 DN80 DN100 DN125 DN150 DN200 DN250 DN300 DN350 DN400 DN450 DN500 DN600 DN700 DN800 DN900 DN1000 DN1200 DN1400

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
seat sealing surface

Features

Triple eccentric structural design: shaft axis offset from disc centre and body centre; seat rotation axis angled to body channel axis
Metal-to-metal hard sealing via conical sealing surfaces (external inclined conical disc periphery mating internal inclined conical seat), forming elliptical contact
Pressure-energised sealing: sealing force increases as differential pressure increases
Disc detaches from seat during opening, eliminating sliding contact friction and reducing operating torque
Integral body and seat construction
Multi-layer sealing rings on valve plate for enhanced sealing performance
Suitable for high-temperature and high-pressure service
Flow regulation capability: flow area increases progressively with disc rotation
Zero-leakage sealing performance
Compact and lightweight construction
Size range NPS 2" - 64" (DN 50-1600)
Pressure rating Class 150-1500 / PN 10-250
Operating temperature range -46 °C to 538 °C

Notes

Operator options listed as 'Manual, Pneumatic, Electric, etc...' — further options available on request
Connection forms listed include 'socket type, etc.' — additional connection forms may be available

Description

A triple eccentric butterfly valve in which the valve stem axis is offset from both the butterfly plate centre and the body centre, and the valve seat rotation axis is angled relative to the body channel axis. The butterfly plate periphery is machined to an external inclined conical surface mating with an internal inclined conical surface seat, forming an elliptical metal-to-metal contact. The design eliminates seat contact friction during opening and closing, and achieves pressure-energised sealing when closed.