Special flange version of the LKB butterfly valve that makes it easy to remove the valve body without needing to dismantle piping set-ups. This in turn makes it easy to undertake repair, service and replacement with a bare minimum of disruption.
Full range, full spectrum
The Alfa Laval LKB butterfly valve range consists of modular units designed to meet the full spectrum of requirements at working pressures from full vacuum to 10 bar. All valves are FDA-compliant, designed for use in a wide range of stainless steel pipe systems, and can be built to comply with virtually any installation standard. Alfa Laval LKB-F for flange connections to easily remove the valve body without dismantling piping setups. For both ISO and DIN.
LKB-F butterfly valves come with several features that ensure reliability performance. A highly polished stainless steel disc with surface smoothness down to Ra<0.8 µm and bearing bushes clipped onto the disc stems prevent metal-to-metal abrasion and ensure smoother disc movement.
The stem diameter provides particularly low flow resistance, ensuring gentle product treatment for low and medium-viscosity products. In addition, Alfa Laval seal technology provides greater thermal stability, better chemical resistance and improved tensile strength.
Manual or automated control
Alfa Laval LKB-F butterfly valves can be complemented with lockable handle for manual operation of with an actuator and in combination with either a valve indication unit or Alfa Laval ThinkTop valve sensing and control units.
For manual operation: Alfa Laval provides a complete range of handles, including a multi-position lockable handle.
For automated operation: A selection of different actuators is available; special double-spring design enables application of maximum torque to the valve disc at breakaway and seal positions. This makes it easy to integrate these valve units into larger systems operated from a central point, and/or to operate them automatically for maximum efficiency.
- Easy maintenance
- Robust design
- Modular with LKB valves
Latest 'Close at hand' online version
How it works
Installation of the Alfa Laval LKB-F is straightforward, matching the two flanged ends on the valve inlet and outlet ports to the pipeline flanges in the piping system. It uses either a pneumatic actuator from a remote location for automated process control or a handle to regulate the flow manually. The actuator comes in three standard versions: normally closed (NC), normally open (NO), and air/air activated (A/A).
For pneumatic operation, an actuator converts axial piston motion into a 90° rotation of the shaft. The actuator torque increases as the valve disc comes into contact with butterfly valve’s seal ring to secure the proper closing of the valve seat.
For manual operation, a handle mechanically locks the valve in an open or closed position. Two-position, four-position, regulating 90°-position, and multi-position handles are available. Manual valves can also be mounted with indication units for feedback on the valve position (open/closed).
Maintenance is easy due to the two flanges and two flange seal rings, which make it easy to remove the valve body without disassembling the piping system. Optional valve sensing and control units provide intuitive control of the double-flanged LKB-F butterfly valve.
Manual or automatic operation for LKB and LKB-F
The automated LKB butterfly valve is controlled from remote location by means of compressed air using a pneumatic actuator.
The actuator controls the axial movement of a piston, which rotates the shaft 90°. The torque exerted by the actuator increases when the valve disc contacts the valve sealing ring, to ensure effective closing. The actuator is available in three standard versions: normally closed (NC), normally open (NO) and air/air activated (A/A). Manual handle is available.