Sirca International SpA

Sirca International SpA

 Via Trieste, 8, 20060 Trezzano Rosa MI, Italy

Double offset butterfly valves 401N series

Double offset butterfly valves 401N series

Double offset butterfly valves 401N series

Size range

3” ÷ 56” (DN80 ÷ DN1400)


Wafer, Lug, Double flanged on request


ASME B16.34, EN 12516-2, EN 593

Face to face

API 609, EN 558

Operating temperature

-40°C + 220°C (-40 °F ÷ +428 °F)

Pressure ratings

ASME class 150 – bidirectional

Flange drilling

ASME B16.5, ASME B16.47 series A, EN1092-1


API 598, EN 12266-1

Leakage class

Rate “A” – No leakage – according to EN 12266-1

Standard materials

Body: Ductile Iron, Carbon Steel, Stainles Steel


Disc: Ductile Iron, Carbon Steel, Stainles Steel


Stem: AISI 304, AISI 316, AISI 630


Seat: PTFE + Carbographite


INCONEL 625 LCF on request for metal to metal seated


Chemical and Pharmaceutical industries, sistems for solvent recovery,


other applications with compatible materials to working conditions


97/23/CE PED, 94/9/CE ATEX, Fire Safe API 607, ISO 10497, API 6FA (on request)


SIL – IEC 61508, IEC 61511, GOST-R, CU TR 10 – CU TR 32

Introduction: Double Eccentricity Butterfly Valve Series 401N

This is a new range of butterfly valves of the double eccentricity type with “bubble tight” seal, designed for heavy duty service, especially as regards to shipbuilding and petrochemical sectors.

Above all it is ideal for shut-off and/or flow control of aggressive fluids or gases.

Awide variety ofmaterials can be used tomake the valve; those falling, in the standard range are.

- Ductile Iron (only fromND350 and bigger size)

- CarboonSteel

- StainlessSteel

- AluminiumBronze (only on request)

Such valves are manufactured according to the most up-to date design criteria, thereby offering maximum guarantee of correct operation and minimum maintenance.

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