Survey of Butterfly Valves
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Butterfly Valves Made of Ductile Cast Iron DN 100 - DN 1200 for water and gas supply pipelines

Düker Butterfly Valves – Safe, Flow-optimised and Resistant Düker Butterfly Valves In Germany alone, many thousands of kilometres of pipelines ensure that water is at our disposal everywhere and anytime. Our butterfly valves are used both for drinking water and raw water and for all gas types (including pressurized air). On request, the butterfly valve may also be The pipeline materials used for this purpose have to used for different media. fulfil high demands: • resist to any ground movements Nominal pressures are PN 10, PN 16 and PN 25, with the maximum ope- • work reliably for years...

Butterfly Valves Type 4510 and 451 – the esse ntial advantages Flow-Optimised Disc Resistance values (zeta values) in open position The Düker butterfly valves have a flow-optimised As an option, our gear boxes have the following disc with double-offset journal. This bearing causes driving modes: The Düker gears with slidercrank mechanism have proven themselves for years and are adapted opti- At a uniform initial revolution speed, the closing speed decreases, so the gear clo- ses softly. This mechanism reduces or eli- a slight rotation at the moment of opening and closing the valve, which is...

Butterfly Valves Type 4510 and 451 – Materials and Versions Versions type threaded sleeve lower part Retaining ring threaded sleeve upper part headless screw Bearing journal washer bush Sealing ring countersunk screw countersunk screw Profile sealing countersunk screw countersunk screw Connection ring module safety ring O-ring O-ring Hexagonal screw inside emamel, outside 2-components epoxy paint etec enamel inside and outside long without Novo bypass sockets long with bypass

Butterfly Valves with our without Handwheel Basic version without handwheel with handwheel model nominal dimension nominal pressure DN in mm PN in bar foot dimension height B in mm h1 in mm Please note: for the underground installation we supply butterfly valves with height-adjustable telescope stem extension sets in various lengths. In the nominal dimensions DN 700 up to DN 1200, there is no open/closed indicator included in this case. DN 800 up to DN 1200: PN 25 is available, however the admissible operating pressure is only 20 bar.

Butterfly Valves with Electric Actuator model nominal dimension nominal pressure flange foot dimension height height dimension dimension Butterfly Valve with Electric Actuator AUMA The standard version of the Auma actuator includes: • limit switch for the end positions open/closed • continuously adjustable torque switch for left and right rotation • indicator flasher for the function indication (1 impulse per rotation) • three thermo switches • handwheel for emergency operation • central plug for motor and control system, degree of protection of the Optional extras: mechanical position...

Butterfly Valves Long Body, with or without Bypass Use of Butterfly Valves with Bypass Operation of the Butterfly Valve with Bypass The butterfly valves with bypass serve for the otherwise difficult air release Normally, when opening the valve, first the bypass from pipelines with several high points. valve and then the main valve are opened. While the water flows, both valves remain open. The bypass normally contains its own shut-off valve and is dimensioned to one tenth of the main nominal dimension. The length of the standard butterfly The process is applied vice versa when closing the...

Butterfly Valves with Novo Sockets nominal dimension nominal pressure socket length length foot dimension height height dimension dimension Thrust-resisting connections of ductile iron but- terfly valves with pipes made of PEHD plastic are possible in the nominal dimensions DN 150 up to Quality on the Highest Level Diiker valves are used worldwide and are subject to elevated requirements in the drinking water sector. Therefore each valve is tested with extreme care before it leaves the factory. It goes without saying that the requirements of the DVGW worksheet W 270 "Reproduction of...

FITTINGS AND VALVES DRAINAGE TECHNOLOGY Engineering GLASS LINING TECHNOLOGIES JOBBING FOUNDRY Düker GmbH & Co. KGaA Hauptstraße 39-41 63846 Laufach Germany Tel. +49 6093 87- 560 Fax +49 6093 87-246 E-Mail: sales.fittings-valves@dueker.de 778250 / 10.13 Specifications subjetct to change without notice Internet: www.dueker.de