LKB is either remote-controlled by means of an actuator or manually operated by means of a handle. The actuator is made in three standard versions, normally closed (NC), normally open (NO) and air/air activated (A/A).
The actuator is designed so that an axial movement of a piston is transformed into a 90° rotation of a shaft. The torque of the actuator is increased when the valve disc contacts the seal ring of the butterfly valve.
The handle for manual operation mechanically locks the valve in its open or closed position.
The actuator is fitted onto the valve by means of a bracket and screws. The handle for manual operation is fitted onto the valve by means of a cap/block system and a screw.
Product detail
| Product code | Alfa Laval - LKB |
| Max. product pressure | 1000 kPa (10 bar) |
| Temperature range | -10°C to + 140°C (EPDM) However max. 95°C when operating the valve |
| Actuator | Max. air pressure: 700 kPa (7 bar) Min. air pressure, NC and NO: 400 kPa (4 bar) Temperature range: -25°C to +90°C |
Standard design
LKB is available in three versions, LKB for ISOand DIN tubes, LKB-2 for DIN tubes and LKB-F for flange connection.
The valve consists of two valve body halves, valve disc, bushes for the disc stem and seal ring. LKB-F also consists of two flanges and two flange seal rings. The valve is assembled by means of screws and nuts.
Actuator
Two actuator sizes, ø85 mm and ø133 mm, cover all valve sizes. The actuator is available in two versions, LKLA and LKLA-T.
The actuator is fitted onto the valve by means of a bracket and screws. (The actuator can also be fitted onto ball valves by means of special brackets).
The handle for manual operation is fitted onto the valve by means of a cap/block system and a screw.
The valve has welding ends as standard, but LKB and LKB-2 can also be supplied with fittings.
Reliable performance
LKB 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.
Technical specifications
| Product code | Alfa Laval - LKB |
| Actuator | Max. air pressure: 700 kPa (7 bar) |
| Applications | The LKB range are hygienic butterfly valves for use in stainless steel pipe systems. |
Valve bodies
| Product wetted steel parts | 1.4307 (304L) or 1.4404 (316L) |
| Disc | 1.4301 (304) or 1.4404 (316L) |
| Other steel parts | 1.4301 (304) |
| Rubber grades | Q, EPDM, FPM, HNBR1) or PFA1) |
| Bushes for valve disc | PVDF |
| Finish | Semi-bright |
1) LKB-F (DIN) with HNBR and LKB-F (DIN & ISO) with PFA are supplied with EPDM flange seal.
Actuator
| Actuator body | 1.4307 (304L) |
| Disc | Light alloy (for ø85 mm: Bronze) Air/air version |
| Seals | NBR |
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.
Manual or automated control
Alfa Laval LKB 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.
