The butterfly valve comprises a ring-shaped body in which a ring-shaped elastomer seat/liner is inserted. A washer guided through a shaft swings through a 90° rotary movement into the gasket. Depending on the version and nominal size, this enables operating pressures of up to 25 bar and temperatures up to 210 °C to be shut off. Most often, these valves are used for mechanically pure liquids, but can also be used in the right material combinations without posing any problems for slightly abrasive media or gases and vapours.
Due to the large variety of materials, the butterfly valve is universally compatible, for example with countless industrial applications, water/drinking water treatment, coastal and offshore sectors. The butterfly valve is also often a cost effective alternative to other valve types, where there are no stringent requirements regarding switching cycles, hygiene or control accuracy. In large nominal sizes of greater than DN 150, it is often the only shut-off valve that is still viable. For more stringent demands with respect to chemical resistance or hygiene, there is the possibility of using a butterfly valve with a seat made of PTFE or TFM. In combination with a PFA encapsulated stainless steel disc, it is suitable for highly aggressive media in the chemical or semiconductor industry; and with a polished stainless steel disc, it can also be used in the foodstuff or pharmaceutical sector.
For all the valve types specified, Lauridsen-group offers numerous customized accessories for automation and process optimization. Electr. position indicator, position and process controllers, sensor systems.
Non pinned shaft version Bi directional Loose rubber liner Dry shaft design Series 13 & 20 face to face options
Wafer - Between flanges PN10/16 & ANSI 150 (up to DN600)
More about 1135 - Lever 1135 Series - Butterfly valve - tapped Ears - Body Cast iron EN GJL250 - Iron Butterfly - EPDM liner Lug (Lug) insulation for long Col Platinum ISO 5211 Axis through vulcanized EPDM liner Handle 10 positions, lockable up to DN150 Epoxy RAL 003 Double sealing PTFE axis Can control gear box
More about 1198 - Spare gearbox 1198 Series - Helical wheel for butterfly valves range AFA Manual steering gear with position indicator Lug - Between flanges PN10/16
1174 - Disc Aluminium bronze / Seat NBR TS: -10°C/+90°C.
More about 1153 - Disc CF8M / SeatEPDM 1153 Series - Butterfly valve - Body Cast iron EN-GJS500 7 - Butterfly Steel - EPDM liner Ears centering (Wafer) insulation for long Col Platinum ISO 5211 through shaft Cuff dovetail removable Lockable Handle 9 positions up to DN200 Non-lockable handle lockable in all positions of DN250
More about 1149 - Disc CF8M / Seat High TemperatureEPDM 1149 Series - Butterfly valve - Body Cast iron EN-GJS500 7 - Butterfly Steel - Liner EPDM HT Ears centering (Wafer) insulation for long Col Platinum ISO 5211
More about 1151 - Disc CF8M / SeatNBR 1151 Series - Butterfly valve - Body Cast iron EN-GJS500 7 - Steel Butterfly - Cuff NBR Ears centering (Wafer) insulation for long Col Platinum ISO 5211 through shaft Cuff dovetail removable
1173 - Disc CF8M / Seat High temperature EPDMTS: -10°C/+130°C.
More about 1156 - DiscCF8M / Seat WhiteNBR 1156 Series - Butterfly valve - Body Cast iron EN-GJS500 7 - Butterfly Steel - NBR White Cuff Ears centering (Wafer) insulation for long Col Platinum ISO 5211 through shaft Cuff dovetail removable
More about 1158 - Disc Aluminium Bronze / Seat NBR 1158 Series - Butterfly valve - Body Cast iron EN-GJS500 7 - Butterfly Copper aluminum - Cuff NBR Ears centering (Wafer) insulation for long Col Platinum ISO 5211 through shaft Cuff dovetail removable
More about 467164-467163 - Stop Valve Stop Valve PN 40/25 Flanged Angle GSC25 Variants: S.D.N.R. = Non-return disc R = Parabolic disc Various actuators DN200-300 available PN40 Other dimensions/materials on request
More about 1154 - DiscCF8M / SeatFKM (Viton®) 1154 Series - Butterfly valve - Body Cast iron EN-GJS500 7 - Steel Butterfly - Cuff FKM Ears centering (Wafer) insulation for long Col Platinum ISO 5211 through shaft Cuff dovetail removable
More about 1157 - DiscCF8M / SeatSilicone 1157 Series - Butterfly valve - Body Cast iron EN-GJS500 7 - Steel Butterfly - Cuff Silicone Ears centering (Wafer) insulation for long Col Platinum ISO 5211 through shaft Cuff dovetail removable
More about 1155 - DiscCF8M + PTFE / SeatPTFE 1155 Series - Butterfly valve - Body Cast iron EN-GJS500 7 - Papillon SS + PTFE - PTFE liner Ears centering (Wafer) Body parts 2 for long insulation Col Platinum ISO 5211
Disc GGG50 rilsan coated above / Seat EPDMTS: -10°C/+110°C More about 1160 - Ductile iron butterfly valve with electric actuator 1160 Series - Butterfly valve - Body Cast iron EN-GJS500 7 - Papillon steel / cast iron - EPDM liner Lug (Lug) long neck for insulation Platinum ISO 5211
Disc GGG50 rilsan coated above / Seat EPDMTS: -10°C/+110°C.