Tri-Clover® LKB Butterfly Valve

Central States Industrial (CSI) offers the Tri-Clover® LKB butterfly valve from Alfa Laval. Either remotely controlled by an actuator or manually operated with a handle, the Tri-Clover LKB butterfly valve is designed to provide years of dependable service in sanitary stainless steel fluid handling systems.

The LKB valves are built for use in a wide range of applications and working pressures. LKB is FDA compliant and available with a variety of handle options.

Models

  • LKB51 Manual Valve
  • LKB53 Actuated Valve

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

APPLICATIONS

Alfa Laval's Tri-Clover LKB butterfly valve is designed for use in a broad spectrum of applications and working pressures. These FDA-compliant valves provide reliable performance and smooth operation. The stem diameter provides particularly low flow resistance, ensuring gentle product treatment for low and medium-viscosity products.

WORKING PRINCIPLE

The LKB is either remotely 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. A variety of handle options for manual operation mechanically secures the valve in its open, closed, or intermediate positions.

STANDARD DESIGN

The valve consists of two valve body halves, a valve disc, bushings for the disc stem, and a seal ring. The valve is assembled by means of screws and nuts. Two actuator sizes, ø 85 mm (3.35 inch) and ø 133 mm (5.24 inch), cover all valve sizes. 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. The LKB is available with either welded ends or Tri-Clamp® sanitary connections.

CONTROL EQUIPMENT

Control and indication can be configured with a pneumatically actuated valve. Options include Tri-Clover Green Top, Alfa Laval ThinkTop®, and laterally mounted indication units.

Materials
Product Wetted Steel Parts304, 316L
Valve Disc316L
Other Steel Parts304
Rubber GradesEPDM (standard)
Silicone
Fluorinated rubber (FPM)
PFa (bonded over EPDM)
HNBR
Bushings for Valve DiscPVDF
Finish≤ 32 microinches RA ID
Machined OD
Actuator Body304
Actuator PistonLight alloy (bronze for ø 85 mm and A/A)
Actuator SealsNitrile (NBR)
TECHNICAL DATA
Max Product Pressure145 psi
Min Product PressureFull vacuum
Valve Temperature Range15 – 200°F
Actuator Max Air Pressure100 psi
Actuator Min Air Pressure, NC or NO60 psi
Actuator Temperature Range15 – 195°F
Actuator Air consumption (FT free air)ø 85 mm = 0.0006 psi
ø 133 mm = 0.0024 psi
LKB ULTRAPURE

The LKB butterfly valve is also available in the UltraPure execution, which is designed and documented to meet high purity demands in industries like biopharmaceutical and personal care. The LKB UltraPure is available with specifications that are preferred by high purity in dusty. The UltraPure version offers an additional set of options for material, end connection, surface finish, and more. UltraPure equipment is available with Alfa Laval's Q-Doc documentation package.

Legacy Valves

Prior to the introduction of the LKB series, Tri-Clover (now Alfa Laval) produced the A51, B51, and B53 models of butterfly valves. The LKB series has replaced these legacy models for all butterfly valve applications. While these valve models are no longer manufactured, many OEM spare parts are still available. See Parts Lists below for details.

Spare Parts

LKB Service Kits
Type11.522.5346
EPDM9611923028961192302996119230309611923031961192303296119230339611923046
Silicone9611923034961192303596119230369611923037961192303896119230399611923047
FPM9611923040961192304196119230429611923043961192304496119230459611923048
HNBR9611923160961192316196119231629611923163881426038814260488142605
PFAN/A96119231839611923184961192318596119231869611923187N/A
LKB Spare Parts
Part11.522.5346Diagram Key
Valve Body Half (AISI 304)96114436509611443220961144323096114432409611443070961141325096114136701
Valve Body Half (AISI 316L)96114436519611443221961144323196114432419611443071961141325196114136711
Disc (AISI 316L)96114136819611411691961141177196114118519611411931N/A96114137012
Disc, 12 (AISI 316L)N/AN/AN/AN/AN/A9612046302N/A2
Bush96114118109611411730961141181096114118909611411970961141206096114137903
Bush96114137609611411730961141181096114118909611411970961141205096114137904
Seal Ring, EPDM96114141309611414090961141410096114141109611414060961141412096114141505
Seal Ring, Silicone96114137209611411740961141182096114119009611411980961141207096114137405
Seal Ring, FPM96114141339611414093961141410396114141139611414063961141412396114141535
Seal Ring, HNBR96114141349611414094961141410496114141149611414064961141412496114141545
Seal Ring, PFAN/A96129005019612900601961290070196129008019612900901N/A5
Set Screw M6 + Nut M696114173409611417340N/AN/AN/AN/AN/A6
Set Screw M8 + Nut M8N/AN/A961141735096114173509611417360N/AN/A6
Set Screw M10 + Nut M10N/AN/AN/AN/AN/A9611417370N/A6
Set Screw M15 + Nut M15N/AN/AN/AN/AN/AN/A96114173806
Wing Nut Kit96114169009611416900961141690196114169019611416902961141690396114169046a


LKB Butterfly Valve Parts List

LKLA 85 NC/NO Actuator Service Kits
1-2.5 (NC)3 (NC)4 (NC)1-2.5 (NO)3 (NO)4 (NO)
961192301096119230109611923010961192301096119230109611923010


LKB Butterfly Valve Parts List

LKLA 85 NC/NO Actuator Spare Parts
Part1-2.5 (NC)3 (NC)4 (NC)1-2.5 (NO)3 (NO)4 (NO)Diagram Key
Actuator, Complete961141630196114163029611416306961141630496114163059611416307-
Air Cylinder9611417580961141758096114175809611417580961141758096114175801
Rotating Cylinder9611416380961141638096114163809611416380961141638096114163802
Piston9612194401961219440196121944019612194301961219430196121943013
O-Ring, NBR9611990052961199005296119900529611990052961199005296119900524
End Cap3135707401313570740131357074013135707401313570740131357074015a
Retaining Ring9611402021961140202196114020219611402021961140202196114020216
O-Ring, NBR9611990396961199039696119903969611990396961199039696119903967
Inner Spring961199162996119916299611991629969119913629961199162996119916268
Outer Spring9611991631961199163196119916319611991631961199163196119916319
Needle Bearing96119912309611991230961199123096119912309611991230961199123010
Needle Bearing96119912319611991231961199123196119912319611991231961199123111
Thrust Bearing96119912369611991236961199123696119912369611991236961199123612
Trust Plate96114164609611416460961141646096114164609611416460961141646014
O-Ring, NBR96119912339611991233961199123396119912339611991233961199123315
Connex Pin96119912359611991235961199123596119912359611991235961199123516
Coupling96114164409611416450961204470396114164409611416450961204470317
Activating Ring, Noryl w/ Screw96114166909611416690961141669096114166909611416690961141669018
Water Rejector961141775096114177509611417750961141775096114177509611471775019
Actuator, Complete for Altop961141678196114167829611416786961141678496114167859611416787-
End Cap, Mark III (for Altop)9611416740961141674096114167409611416740961141674096114167405b


LKB Butterfly Valve Parts List

LKLA 85 A/A Service Kits
1-2.5346
9611923011961192301196119230119611923012


LKB Butterfly Valve Parts List

LKLA 85 A/A Spare Parts
Part1-2.5346Diagram Key
Actuator9611417491961141749296114174939611417500-
Air Cylinder96114175809611417580961141758096114174201
Rotating Cylinder96114174419611417441961141744196114174402
Piston96114175209611417520961141752096114175203
O-Ring, NBR96119900529611990052961199005296119900524
End Cap31357074013135707401313570740131357074015a
Retaining Ring96114020219611402021961140202196114020216
O-Ring, NBR961199039696119903969611990396

9611990396

7
Needle Bearing961199123096119912309611991230961199123010
Needle Bearing961199123196119912319611991231961199123111
Thrust Bearing961199123696119912369611991236961199123612
Thrust Plate961141757096114175709611417570961141754014
O-Ring, NBR961199123396119912339611991233961199003015
Connex Pin961199123596119912359611991235961199131316
Coupling961141755196114175619612044802961141665017
Activating Ring w/ Screw961141669096114166909611416690N/A18
Retaining Plate961141437096114143709611414370961141437022
Threaded Plug961199122196119912219611991221961199122123
Air/Air for Altop961208120296120812039612081204N/A-
End Cap, Mark III (for Altop)961141674096114167409611416740N/A5b


LKB Butterfly Valve Parts List

LKLA 133 NC/NO Actuator Service Kits
4 (NC)4 (NO)6 (NC)6 (NO)
9611923020961192302096119230209611923020


LKB Butterfly Valve Parts List

LKLA 133 NC/NO Spare Parts
Part4 (NC)4 (NO)6 (NC)6 (NO)Diagram Key
Actuator, Complete9612271306961227130796122713169612271314-
Air Cylinder96122685019612268501961226850196122685011
Rotating Cylinder96122678019612267801961226780196122678012
Piston96122700019612268001961227000196122680013
O-Ring, NBR96119923679611992367961199236796119923674
Retaining Ring96122682019612268201961226820196122682016
O-Ring, NBR96119900359611990035961199003596119900357
Spring Assembly96122701019612270101961227010196122701018
Needle Bearing961199123196119912319611991231961199123110
Needle Bearing961199235596119923559611992355961199235511
Thrust Bearing961199234796119923479611992347961199234712
Connex Pin961199235796119923579611992357961199235713
Thrust Plate961226710196122671019612267101961226710114
O-Ring, NBR961199007996119900799611990079961199007915
Connex Pin961199235896119923589611992358961199235816
Coupling961227150196122715019612271503961227150317
Indication Pin961227190196122719019612271901961227190118
Water Rejector961141775096114177509611417750961141775019


LKB Butterfly Valve Parts List

LKLA 133 A/A Actuator Service Kits
46
96119230229611923022


LKB Butterfly Valve Parts List

LKLA 133 A/A Actuator Spare Parts
Part46Diagram Key
Actuator, Complete96122713089612271318-
Air Cylinder961226850196122685011
Rotating Cylinder961226780196122678012
Piston961226800196122680013
O-Ring NBR961199236796119923674
End Cap961227140196122714015
Retaining Ring961226820196122682016
O-Ring, NBR961199003596119900357
Needle Bearing9611991231961199123110
Needle Bearing9611992355961199235511
Thrust Bearing9611992347961199234712
Connex Pin9611992358961199235813
Thrust Plate9612280401961228040114
O-Ring, NBR9611990079961199007915
Connex Pin9611992357961199235716
Coupling9612282701961228270317
Indication Pin9612271901961227190118
Water Rejector9611417750961141775019
Retaining Plate9612348601961234860122
Threaded Plug9611991221961199122123


LKB Butterfly Valve Parts List

LKLA-T 85 NC/NO Actuator Service Kits
1-2.5 (NC)3 (NC)4 (NC)1-2.5 (NO)3 (NO)4 (NO)
961192302196119230219611923021961192302196119230219611923021


LKB Butterfly Valve Parts List

LKLA-T 85 NC/NO Actuator Spare Parts
Part1-2.5 (NC)3 (NC)4 (NC)1-2.5 (NO)3 (NO)4 (NO)Diagram Key
Actuator, Complete961219400296121940039612194007961219400596121940069612194008-
Air Cylinder9611417580961141758096114175809611417580961141758096114175801
Rotating Cylinder9611416380961141638096114163809611416380961141638096114163802
Piston9612193902961219390296121939029612193901961219390196121939013
O-Ring, NBR9611990052961199005296119900529611990052961199005296119900524
End Cap9612193601961219360196121936019612193601961219360196121936015
Retaining Ring9611402021961140202196114020219611402021961140202196114020216
O-Ring, NBR9611990396961199039696119903969611990396961199039696119903967
Inner Spring9611991629961199162996119916299611991629961199162996119916298
Outer Spring9611991631961199163196119916319611991631961199163196119916319
Needle Bearing96119912309611991230961199123096119912309611991230961199123010
Needle Bearing96119912319611991231961199123196119912319611991231961199123111
Thrust Bearing96119912369611991236961199123696119912369611991236961199123612
Thrust Plate96114164609611416460961141646096114164609611416460961141646014
O-Ring, NBR96119912339611991233961199123396119912339611991233961199123315
Connex Pin96119912359611991235961199123596119912359611991235961199123516
Coupling96114164409611416450961204470396114164409611416450961204470317
Activating Ring w/ Screw96114166909611416690961141669096114166909611416690961141669018
Water Rejector96114177509611417750961141775096114177509611417750961141775019
O-Ring, NBR22340421223404212234042122340421223404212234042120
Air Fitting88124942088124942088124942088124942088124942088124942021


LKB Butterfly Valve Parts List

LKLA-T 85 A/A Actuator Service Kits
1-2.5346
9611923023961192302396119230239611923024


LKB Butterfly Valve Parts List

LKLA-T 85 A/A Actuator Spare Parts
Part1-2.5346Diagram Key
Actuator, Complete9612194102961219410396121941049612194201-
Air Cylinder96114175809611417580961141758096114174201
Rotating Cylinder96114174419611417441961141744196114174402
Piston96121939039612193903961219390396121939033
O-Ring, NBR96119900529611990052961199005296119900524
End Cap96121936019612193601961219360196121936015
Retaining Ring96114020219611402021961140202196114020216
O-Ring, NBR96119903969611990396961199039696119903967
Needle Bearing961199123096119912309611991230961199123010
Needle Bearing961199123196119912319611991231961199123111
Thrust Bearing961199123696119912369611991236961199123612
Thrust Plate961141757096114175709611417570961141754014
O-Ring, NBR961199123396119912339611991233961199003015
Connex Pin961199123596119912359611991235961199131316
Coupling961141755196114175619612044802961141747117
Activating Ring w/ Screw961141669096114166909611416690961141665018
O-Ring, NBR2234042122340421223404212234042120
Air Fitting88124942088124942088124942088124942021
Threaded Plug961199122196119912219611991221961199122123


LKB Butterfly Valve Parts List

LKLA-T 133 NC/NO Actuator Service Kits
4 (NC)4 (NO)6 (NC)6 (NO)
9611923056961192305696119230569611923056


LKB Butterfly Valve Parts List

LKLA-T 133 NC/NO Actuator Spare Parts
Part4 (NC)4 (NO)6 (NC)6 (NO)Diagram Key
Actuator, Complete9612374906961237490796123749169612374917-
Air Cylinder96122685019612268501961226850196122685011
Rotating Cylinder96122678019612267801961226780196122678012
Piston96123699019612369902961236990196123699023
O-Ring, NBR961199236796119923679611992367969119923674
End Cap96122714029612271402961227140296122714025
Retaining Ring96122682019612268201961226820196122682016
O-Ring, NBR96119900359611990035961199003596119900357
Spring Assembly96122701019612270101961227010196122701018
Needle Bearing961199123196119912319611991231961199123110
Needle Bearing9611992355961199235596119923559691199235511
Thrust Bearing961199234796119923479611992347961199234712
Connex Pin961199235796119923579611992357961199235713
Thrust Plate961226710196122671019612267101961226710114
O-Ring, NBR961199007996119900799611990079961199007915
Connex Pin961199235896119923589611992358961199235816
Coupling961227150196122715019612271503961227150317
Indication Pin961227190196122719019612271901961227190118
Water Rejector961141775096114177509611417750961141775019
O-Ring2234042122340421223404212234042120
Air Fitting88124942088124942088124942088124942021
Guiding Ring961236980196123698019612369801961236980124
Spring961237000196123700019612370001961237000125


LKB Butterfly Valve Parts List

LKLA-T 133 A/A Actuator Service Kits
46
96119230579611923057


LKB Butterfly Valve Parts List

LKLA-T 133 A/A Actuator Spare Parts
Part46Diagram Key
Actuator, Complete96123749089612374918-
Air Cylinder961226850196122685011
Rotating Cylinder961226780196122678012
Piston961236990296123699023
O-Ring, NBR961199236796119923674
End Cap961227140296122714025
Retaining Ring961226820196122682016
O-Ring, NBR961199003596119900357
Needle Bearing9611991231961199123110
Needle Bearing9611992355961199235511
Thrust Bearing9611992347961199234712
Connex Pin9611992358961199235813
Thrust Plate9612280401961228040114
O-Ring, NBR9611990079961199007915
Connex Pin9611992357961199235716
Coupling9612282701961228270317
Indication Pin9612271901961227190118
Water Rejector9611417750961141775019
O-Ring, NBR

22340421

2234042120
Air Fitting88124942088124942021
Guiding Band9612369801961236980124
Spring9612370001961237000125


LKB Butterfly Valve Parts List

Handle Spare Parts

Two and Four Position Regulating Handle

Part1-2.5346Diagram Key
2 Position Handle, Complete961204500196120451019612045901N/A-
4 Position Handle9612045002961204510296120459019612079101-
Location Cap w/ 2 Pos.961141138096114114309612046401N/A1a
Location Cap w/ 4 Pos.96114173909611417400961204650196120792011b
Transfer Block96120454019612045501961204620196120793012
Handle96114114009611411401961204610196123685013
Screw w/ Pin96120452019612045301961204530196120453014
Spring96119919989611991998961199198296123651015
Ball96119919709611991970961199198196119927136


LKB Butterfly Valve Parts List


Regulating Handle with Infinite Positions

Part1-2.534Diagram Key
Handle w/ Infinite Pos., Complete961204740196120474029612047403-
Location Cap9612047101961204710296120471031
Transfer Block9612047001961204700296120470032
Handle9612047201961204720296120472023
Screw w/ Pin9612045201961204530196120453014
Crosshead9611991995961199199696119919967


LKB Butterfly Valve Parts List


Handle for Indication Unit

Part1-2.534Diagram Key
Screw w/ Pin9612045201961204530196120453014
Spring9611991998961199199896119919825
Ball9611991970961199197096119919816
Bracket9611416470961141648096120815028
Screw9611991686961199168696119916869
Activating Ring w/ Screw96114166909611416690961141669011


LKB Butterfly Valve Parts List


Lockable Multiposition Handle

Part1-2.534Diagram Key
Handle, Complete961259280196125928029612592803-
Insert96125889019612588902N/A1
Positioning Cap (3"-4")N/A961258880196125888012
Positioning Cap (1"-2.5")9612588701N/AN/A2
Screw9612045302961204530196120453013


LKB Butterfly Valve Parts List


Handle for Series B51A

Part11.522.534Diagram Key
Handle3310153310153310153310153310163307766
Stop Plate331141C331141C331141C331141C331142C331142C7
Ret. Screw3300283300283300283300283300353300358


LKB Butterfly Valve Parts List

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