Alfa Laval LKB-F Butterfly Valve

The Alfa Laval LKB-F butterfly valve is a flange version of the LKB valve, making it easy to remove the valve body without dismantling piping setups. This feature allows it to be easily serviced or replaced with minimal disruption. The valve can be operated manually or automatically with an actuator. Actuators are available in 3 standard versions: normally closed (NC), normally open (NO), or air/air activated (A/A).

LKB-F is available in the following sizes: 1, 1.5, 2, 2.5, 3, 4, and 6 inch.

Technical Data


Max. Product Pressure145 psi
Min. Product PressureFull Vacuum
Temperature Range15°F to 200°F
Max. temp. if valve operates


Max. Air Pressure100 psi
Min. Air Pressure, NC and NO60 psi
Temperature Range15°F to 195°F
Air Consumption (liters free air) - ø3.35 in0.24 x p (bar)
Air Consumption (liters free air) - ø5.24 in0.95 x p (bar)
Weightø3.35 in - 6.6 lbs
ø5.24 in - 26.4 lbs
Physical Data

Valve Bodies

Product Wetted Steel Parts304L or 316L
Disc304 or 316L
Other Steel Parts304
Rubber GradesQ, EPDM, FPM, HNBR, or PFA
Bushes for Valve DiscPVDF


Actuator Body304L
PistonLight alloy (for ø3.35 in: Bronze) Air/air version
Standard Design

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.

Two actuator sizes, ø3.35" and ø5.24", cover all sizes.

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 LKB is available with either welded ends or Tri-Clamp® sanitary connections.

  • Tri-Clamp® or butt weld ends standard (Other components available upon request.
  • ThinkTop® for control and indication.
  • Green Top - Position indication MS or PS.
  • Indication unit with micro switches.*
  • Indication unit with inductive proximity switches.
  • Handle with two or four positions (standard on 6").
  • Handle for electrical position indication.
  • Handle with infinite intermediate positions (not for 6").
  • Multi-positioning handle with lever handle or pull knob.
  • Service tool for actuator.
  • Service tool for fitting 1"-1.5" valve discs

Spare Parts

LKB-F DIN Service Kits
TypeDN 25DN 32DN 40DN 50DN 65DN 80DN 100DN 125DN 150


LKB Parts list

LKB-F DIN Spare Parts
PartDN 25DN 32DN 40DN 50DN 65DN 80DN 100DN 125DN 150Diagram Key
Valve Body Half, AISI 316L9612402401961240240296124024039612402404N/AN/AN/AN/AN/A1
Valve Body Half, Welding, AISI 316LN/AN/AN/AN/A961240240596124024069612402407961240240896124024091
Disc, AISI 316L9612073604961207370496120738049612073904961207400496120741049612074204961207690496114137012
Bush Set, 10 pcs9614464002961446400296144640029614464003961446400396144640039614464003961446400896144640093
Bush Set, 10 pcs9614464002961446400296144640029614464003961446400396144640039614464004961446400896144640094
Set of Screws and Nuts9612400101961240010196124001019612400102961240010396124001039612400104961240010596124001066
Flange, AISI 316L9612402501961240250296124025039612402504961240250596124025069612402507961240250896124025097

LKB Parts list

LKB-F ISO Service Kits

LKB Parts list

LKB-F ISO Spare Parts
Part11.522.534Diagram Key
Valve Body Half, AISI 316L9612402410961240241196124024129612402413961240241496124024151
Valve Body Half, AISI 304L9611413680961141169096114117709611411850961141193096120463011
Disc, AISI 3049611413680961141169096114117709611411850961141193096120463012
Disc, AISI 316L9611413681961141169196114117719611411851961141193196120463022
Bush Set, 10 pcs9614464002961446400196144640029614464003961446400496144640063
Bush Set, 10 pcs9614464002961446400196144640029614464003961446400496144640064
Set of Screws and Nuts9612400101961240010196124001029612400102961240010396124001046
Flange, AISI 316L9612402510961240251196124025129612402513961240251496124025157

LKB Parts list

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