Butterfly valves

In butterfly valves, the flow is controlled by means of a flap.

Quarter-turn butterfly valves are quick to close. Owing to their low and short structure, butterfly valves are lighter than gate, seal, and ball valves. Rubber-lined butterfly valves are typically used with harmless media. In the case of abrasive and hazardous media, Teflon-lined butterfly valves are applied. With gases and fuels, metal seated eccentric butterfly valves are used.

Garlock teflon-tiivisteisiä läppäventtiileitä

Teflon lined butterfly valves

DN 50-600, ASME 2
PN 10/16, ANSI 150#
Between flanges, lug type
Operating temperatures: 40°C...200°C (UHMWPE lining 85°C)
Operating pressures: 1 mbar…16 bar
FDA hyväksyntä (valkoinen PTFE ja antistaattinen vuoraus)
TA-Luft DIN15848 highest rating, A – 35,000V spark test
MTBF rating EN 61508 SIL2
Blow out proof stem according to standard EN 731-3 – PED 97/23/EC / Atex

Kumivuorattu läppäventtiili pneumaatisella toimilaitteella

Actuator operated butterfly valves

Metal seated butterfly valves

DN 80 – 1200, NPS 3” – 24”
PN 10 – 40, ANSI 150/300
Between flanges, flanged, butt-weld ends
Steel, stainless and acid-proof steel, special materials

Rubber lined butterfly valves

DN 40-2000
PN 10-16
Between flanges, flanged
Body GG-25, GGG 40, GS-C 25, AISI 316
Flap AISI 316, GGG 40, Alu-bronze
Lining EPDM, heat-resistant EPDM, NBR, Viton