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Home|Product|STEAM INDUSTRY SUPPLIES|SIRCA Pneumatic Actuators|Butterfly Valve

Butterfly Valve

Series 301 - Resilient seated butterfly valves

Price: Contact

Model: 301

Trademark: SIRCA

Origin: Italy

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Series 301 - Resilient seated butterfly valves

Size range	1.1/2” ÷ 40” (DN40 ÷ DN1000)
Type	Wafer, Lug, Double flanged
Face to face dimension	EN 558 series 20
Top flange	ISO 5211
Max working pressure	20 bar – bidirectional
Flange drilling	PN6, PN10, PN16 / ANSI class 150
Operating temperature	-20 °C ÷ +160 °C (-4 °F ÷ +320 °F)
Standard materials	Body: Ductile Iron, Carbon Steel, Stainless Steel, Al/Bronze, F51
	Disc: Ductile Iron, Carbon Steel, Stainless Steel, Al/Bronze
	Stem: AISI 316, AISI 420, AISI 630, MONEL K
	Seat: NBR, EPDM, EPDM HT, VITON, more
	(all seats have inside a metal ring reinforcement)
Leakage class	Rate “A” – No leakage – according to EN 12266-1
Applications	Liquids or gases in industrial environments, plants,
	water treatment, vacuum, other applications with compatible
	materials to working conditions
Certifications	2014/68/UE PED, 2014/34/UE ATEX,
	SIL IEC 61508 – IEC 61511 GOST-R,
	CU TR 10 – CU TR 32, TA-Luft

The upper stem is locked by manual or motorized control while the O-ring assures a life-time lubrication. Moreover, a mark is machined on the top part of the stem, which reproduces exactly the disc position, when yhe valve is inserted between the flanges.

The one-piece valve body casting ensures high strength with minimum weight. It can be supplied in a wide choice of materials, for both WAFER and LUG models, so as to meet all possible installation requirements.

The stem has a quare end which fits directly in the disc; hence no fastening elements are needed. This allows the disc to float on the stem and to be self-centering inside the seal so as to form a continuos tight shut-off line with the latter.

Thanks to the special shape of the SIRCA disc, pressure drops and forces of rotation are appreciably reduced. Thanks to the special internal profile of the surface of contact between disc-seat, the reciprocal back pressures ensure tight shutoff.

The resilient seat is vulcanized on metallic support ring. Thanks to its straight-forwar design it is easily replaceable without use of special tools.

Thanks to the special profile of the seat, no seal is required between the flanges.while the O-ring assures a life-time lubrication. Moreover, a mark is machined on the top part of the stem, which reproduces exactly the disc position, when yhe valve is inserted between the flanges.