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.

Shop LKB Series

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.

Alfa Laval is a leading global supplier of products and solutions within the key technology areas of heat transfer, separation, and fluid handling.

LKB Butterfly Valve

Industries

Processed Foods, Beverages, Brewery, Home & Personal Care, Chemical

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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 Parts	304, 316L
Valve Disc	316L
Other Steel Parts	304
Rubber Grades	EPDM (standard) Silicone Fluorinated rubber (FPM) PFa (bonded over EPDM) HNBR
Bushings for Valve Disc	PVDF
Finish	≤ 32 microinches RA ID Machined OD
Actuator Body	304
Actuator Piston	Light alloy (bronze for ø 85 mm and A/A)
Actuator Seals	Nitrile (NBR)

TECHNICAL DATA

Max Product Pressure	145 psi
Min Product Pressure	Full vacuum
Valve Temperature Range	15 – 200°F
Actuator Max Air Pressure	100 psi
Actuator Min Air Pressure, NC or NO	60 psi
Actuator Temperature Range	15 – 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.

Product Resources

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LKB Butterfly Valve (Alfa Laval)

Literature

Blog Posts

Water Hammer: Dangers and Tips to Prevent It From Happening

Parts List

Spare Parts

LKB Service Kits

Type	1	1.5	2	2.5	3	4	6
EPDM	9611923028	9611923029	9611923030	9611923031	9611923032	9611923033	9611923046
Silicone	9611923034	9611923035	9611923036	9611923037	9611923038	9611923039	9611923047
FPM	9611923040	9611923041	9611923042	9611923043	9611923044	9611923045	9611923048
HNBR	9611923160	9611923161	9611923162	9611923163	88142603	88142604	88142605
PFA	N/A	9611923183	9611923184	9611923185	9611923186	9611923187	N/A

Handle Spare Parts

Two and Four Position Regulating Handle

Part	1-2.5	3	4	6	Diagram Key
2 Position Handle, Complete	9612045001	9612045101	9612045901	N/A	-
4 Position Handle	9612045002	9612045102	9612045901	9612079101	-
Location Cap w/ 2 Pos.	9611411380	9611411430	9612046401	N/A	1a
Location Cap w/ 4 Pos.	9611417390	9611417400	9612046501	9612079201	1b
Transfer Block	9612045401	9612045501	9612046201	9612079301	2
Handle	9611411400	9611411401	9612046101	9612368501	3
Screw w/ Pin	9612045201	9612045301	9612045301	9612045301	4
Spring	9611991998	9611991998	9611991982	9612365101	5
Ball	9611991970	9611991970	9611991981	9611992713	6

Part	1-2.5	3	4	Diagram Key
Handle w/ Infinite Pos., Complete	9612047401	9612047402	9612047403	-
Location Cap	9612047101	9612047102	9612047103	1
Transfer Block	9612047001	9612047002	9612047003	2
Handle	9612047201	9612047202	9612047202	3
Screw w/ Pin	9612045201	9612045301	9612045301	4
Crosshead	9611991995	9611991996	9611991996	7

Part	1-2.5	3	4	Diagram Key
Handle, Complete	9612592801	9612592802	9612592803	-
Insert	9612588901	9612588902	N/A	1
Positioning Cap (3"-4")	N/A	9612588801	9612588801	2
Positioning Cap (1"-2.5")	9612588701	N/A	N/A	2
Screw	9612045302	9612045301	9612045301	3

Part	1	1.5	2	2.5	3	4	Diagram Key
Handle	331015	331015	331015	331015	331016	330776	6
Stop Plate	331141C	331141C	331141C	331141C	331142C	331142C	7
Ret. Screw	330028	330028	330028	330028	330035	330035	8

Part	4	6	Diagram Key
Actuator, Complete	9612374908	9612374918	-
Air Cylinder	9612268501	9612268501	1
Rotating Cylinder	9612267801	9612267801	2
Piston	9612369902	9612369902	3
O-Ring, NBR	9611992367	9611992367	4
End Cap	9612271402	9612271402	5
Retaining Ring	9612268201	9612268201	6
O-Ring, NBR	9611990035	9611990035	7
Needle Bearing	9611991231	9611991231	10
Needle Bearing	9611992355	9611992355	11
Thrust Bearing	9611992347	9611992347	12
Connex Pin	9611992358	9611992358	13
Thrust Plate	9612280401	9612280401	14
O-Ring, NBR	9611990079	9611990079	15
Connex Pin	9611992357	9611992357	16
Coupling	9612282701	9612282703	17
Indication Pin	9612271901	9612271901	18
Water Rejector	9611417750	9611417750	19
O-Ring, NBR	22340421	22340421	20
Air Fitting	881249420	881249420	21
Guiding Band	9612369801	9612369801	24
Spring	9612370001	9612370001	25

Part	4 (NC)	4 (NO)	6 (NC)	6 (NO)	Diagram Key
Actuator, Complete	9612374906	9612374907	9612374916	9612374917	-
Air Cylinder	9612268501	9612268501	9612268501	9612268501	1
Rotating Cylinder	9612267801	9612267801	9612267801	9612267801	2
Piston	9612369901	9612369902	9612369901	9612369902	3
O-Ring, NBR	9611992367	9611992367	9611992367	96911992367	4
End Cap	9612271402	9612271402	9612271402	9612271402	5
Retaining Ring	9612268201	9612268201	9612268201	9612268201	6
O-Ring, NBR	9611990035	9611990035	9611990035	9611990035	7
Spring Assembly	9612270101	9612270101	9612270101	9612270101	8
Needle Bearing	9611991231	9611991231	9611991231	9611991231	10
Needle Bearing	9611992355	9611992355	9611992355	96911992355	11
Thrust Bearing	9611992347	9611992347	9611992347	9611992347	12
Connex Pin	9611992357	9611992357	9611992357	9611992357	13
Thrust Plate	9612267101	9612267101	9612267101	9612267101	14
O-Ring, NBR	9611990079	9611990079	9611990079	9611990079	15
Connex Pin	9611992358	9611992358	9611992358	9611992358	16
Coupling	9612271501	9612271501	9612271503	9612271503	17
Indication Pin	9612271901	9612271901	9612271901	9612271901	18
Water Rejector	9611417750	9611417750	9611417750	9611417750	19
O-Ring	22340421	22340421	22340421	22340421	20
Air Fitting	881249420	881249420	881249420	881249420	21
Guiding Ring	9612369801	9612369801	9612369801	9612369801	24
Spring	9612370001	9612370001	9612370001	9612370001	25

Part	1-2.5	3	4	6	Diagram Key
Actuator, Complete	9612194102	9612194103	9612194104	9612194201	-
Air Cylinder	9611417580	9611417580	9611417580	9611417420	1
Rotating Cylinder	9611417441	9611417441	9611417441	9611417440	2
Piston	9612193903	9612193903	9612193903	9612193903	3
O-Ring, NBR	9611990052	9611990052	9611990052	9611990052	4
End Cap	9612193601	9612193601	9612193601	9612193601	5
Retaining Ring	9611402021	9611402021	9611402021	9611402021	6
O-Ring, NBR	9611990396	9611990396	9611990396	9611990396	7
Needle Bearing	9611991230	9611991230	9611991230	9611991230	10
Needle Bearing	9611991231	9611991231	9611991231	9611991231	11
Thrust Bearing	9611991236	9611991236	9611991236	9611991236	12
Thrust Plate	9611417570	9611417570	9611417570	9611417540	14
O-Ring, NBR	9611991233	9611991233	9611991233	9611990030	15
Connex Pin	9611991235	9611991235	9611991235	9611991313	16
Coupling	9611417551	9611417561	9612044802	9611417471	17
Activating Ring w/ Screw	9611416690	9611416690	9611416690	9611416650	18
O-Ring, NBR	22340421	22340421	22340421	22340421	20
Air Fitting	881249420	881249420	881249420	881249420	21
Threaded Plug	9611991221	9611991221	9611991221	9611991221	23

Part	1-2.5 (NC)	3 (NC)	4 (NC)	1-2.5 (NO)	3 (NO)	4 (NO)	Diagram Key
Actuator, Complete	9612194002	9612194003	9612194007	9612194005	9612194006	9612194008	-
Air Cylinder	9611417580	9611417580	9611417580	9611417580	9611417580	9611417580	1
Rotating Cylinder	9611416380	9611416380	9611416380	9611416380	9611416380	9611416380	2
Piston	9612193902	9612193902	9612193902	9612193901	9612193901	9612193901	3
O-Ring, NBR	9611990052	9611990052	9611990052	9611990052	9611990052	9611990052	4
End Cap	9612193601	9612193601	9612193601	9612193601	9612193601	9612193601	5
Retaining Ring	9611402021	9611402021	9611402021	9611402021	9611402021	9611402021	6
O-Ring, NBR	9611990396	9611990396	9611990396	9611990396	9611990396	9611990396	7
Inner Spring	9611991629	9611991629	9611991629	9611991629	9611991629	9611991629	8
Outer Spring	9611991631	9611991631	9611991631	9611991631	9611991631	9611991631	9
Needle Bearing	9611991230	9611991230	9611991230	9611991230	9611991230	9611991230	10
Needle Bearing	9611991231	9611991231	9611991231	9611991231	9611991231	9611991231	11
Thrust Bearing	9611991236	9611991236	9611991236	9611991236	9611991236	9611991236	12
Thrust Plate	9611416460	9611416460	9611416460	9611416460	9611416460	9611416460	14
O-Ring, NBR	9611991233	9611991233	9611991233	9611991233	9611991233	9611991233	15
Connex Pin	9611991235	9611991235	9611991235	9611991235	9611991235	9611991235	16
Coupling	9611416440	9611416450	9612044703	9611416440	9611416450	9612044703	17
Activating Ring w/ Screw	9611416690	9611416690	9611416690	9611416690	9611416690	9611416690	18
Water Rejector	9611417750	9611417750	9611417750	9611417750	9611417750	9611417750	19
O-Ring, NBR	22340421	22340421	22340421	22340421	22340421	22340421	20
Air Fitting	881249420	881249420	881249420	881249420	881249420	881249420	21

Part	4	6	Diagram Key
Actuator, Complete	9612271308	9612271318	-
Air Cylinder	9612268501	9612268501	1
Rotating Cylinder	9612267801	9612267801	2
Piston	9612268001	9612268001	3
O-Ring NBR	9611992367	9611992367	4
End Cap	9612271401	9612271401	5
Retaining Ring	9612268201	9612268201	6
O-Ring, NBR	9611990035	9611990035	7
Needle Bearing	9611991231	9611991231	10
Needle Bearing	9611992355	9611992355	11
Thrust Bearing	9611992347	9611992347	12
Connex Pin	9611992358	9611992358	13
Thrust Plate	9612280401	9612280401	14
O-Ring, NBR	9611990079	9611990079	15
Connex Pin	9611992357	9611992357	16
Coupling	9612282701	9612282703	17
Indication Pin	9612271901	9612271901	18
Water Rejector	9611417750	9611417750	19
Retaining Plate	9612348601	9612348601	22
Threaded Plug	9611991221	9611991221	23

Part	4 (NC)	4 (NO)	6 (NC)	6 (NO)	Diagram Key
Actuator, Complete	9612271306	9612271307	9612271316	9612271314	-
Air Cylinder	9612268501	9612268501	9612268501	9612268501	1
Rotating Cylinder	9612267801	9612267801	9612267801	9612267801	2
Piston	9612270001	9612268001	9612270001	9612268001	3
O-Ring, NBR	9611992367	9611992367	9611992367	9611992367	4
Retaining Ring	9612268201	9612268201	9612268201	9612268201	6
O-Ring, NBR	9611990035	9611990035	9611990035	9611990035	7
Spring Assembly	9612270101	9612270101	9612270101	9612270101	8
Needle Bearing	9611991231	9611991231	9611991231	9611991231	10
Needle Bearing	9611992355	9611992355	9611992355	9611992355	11
Thrust Bearing	9611992347	9611992347	9611992347	9611992347	12
Connex Pin	9611992357	9611992357	9611992357	9611992357	13
Thrust Plate	9612267101	9612267101	9612267101	9612267101	14
O-Ring, NBR	9611990079	9611990079	9611990079	9611990079	15
Connex Pin	9611992358	9611992358	9611992358	9611992358	16
Coupling	9612271501	9612271501	9612271503	9612271503	17
Indication Pin	9612271901	9612271901	9612271901	9612271901	18
Water Rejector	9611417750	9611417750	9611417750	9611417750	19

Part	1-2.5	3	4	6	Diagram Key
Actuator	9611417491	9611417492	9611417493	9611417500	-
Air Cylinder	9611417580	9611417580	9611417580	9611417420	1
Rotating Cylinder	9611417441	9611417441	9611417441	9611417440	2
Piston	9611417520	9611417520	9611417520	9611417520	3
O-Ring, NBR	9611990052	9611990052	9611990052	9611990052	4
End Cap	3135707401	3135707401	3135707401	3135707401	5a
Retaining Ring	9611402021	9611402021	9611402021	9611402021	6
O-Ring, NBR	9611990396	9611990396	9611990396	9611990396	7
Needle Bearing	9611991230	9611991230	9611991230	9611991230	10
Needle Bearing	9611991231	9611991231	9611991231	9611991231	11
Thrust Bearing	9611991236	9611991236	9611991236	9611991236	12
Thrust Plate	9611417570	9611417570	9611417570	9611417540	14
O-Ring, NBR	9611991233	9611991233	9611991233	9611990030	15
Connex Pin	9611991235	9611991235	9611991235	9611991313	16
Coupling	9611417551	9611417561	9612044802	9611416650	17
Activating Ring w/ Screw	9611416690	9611416690	9611416690	N/A	18
Retaining Plate	9611414370	9611414370	9611414370	9611414370	22
Threaded Plug	9611991221	9611991221	9611991221	9611991221	23
Air/Air for Altop	9612081202	9612081203	9612081204	N/A	-
End Cap, Mark III (for Altop)	9611416740	9611416740	9611416740	N/A	5b

Part	1	1.5	2	2.5	3	4	6	Diagram Key
Valve Body Half (AISI 304)	9611443650	9611443220	9611443230	9611443240	9611443070	9611413250	9611413670	1
Valve Body Half (AISI 316L)	9611443651	9611443221	9611443231	9611443241	9611443071	9611413251	9611413671	1
Disc (AISI 316L)	9611413681	9611411691	9611411771	9611411851	9611411931	N/A	9611413701	2
Disc, 12 (AISI 316L)	N/A	N/A	N/A	N/A	N/A	9612046302	N/A	2
Bushing	9611411810	9611411730	9611411810	9611411890	9611411970	9611412060	9611413790	3
Bushing	9611413760	9611411730	9611411810	9611411890	9611411970	9611412050	9611413790	4
Seal Ring, EPDM	9611414130	9611414090	9611414100	9611414110	9611414060	9611414120	9611414150	5
Seal Ring, Silicone	9611413720	9611411740	9611411820	9611411900	9611411980	9611412070	9611413740	5
Seal Ring, FPM	9611414133	9611414093	9611414103	9611414113	9611414063	9611414123	9611414153	5
Seal Ring, HNBR	9611414134	9611414094	9611414104	9611414114	9611414064	9611414124	9611414154	5
Seal Ring, PFA	N/A	9612900501	9612900601	9612900701	9612900801	9612900901	N/A	5
Set Screw M6 + Nut M6	9611417340	9611417340	N/A	N/A	N/A	N/A	N/A	6
Set Screw M8 + Nut M8	N/A	N/A	9611417350	9611417350	9611417360	N/A	N/A	6
Set Screw M10 + Nut M10	N/A	N/A	N/A	N/A	N/A	9611417370	N/A	6
Set Screw M15 + Nut M15	N/A	N/A	N/A	N/A	N/A	N/A	9611417380	6
Wing Nut Kit	9611416900	9611416900	9611416901	9611416901	9611416902	9611416903	9611416904	6a

Part	1-2.5 (NC)	3 (NC)	4 (NC)	1-2.5 (NO)	3 (NO)	4 (NO)	Diagram Key
Actuator, Complete	9611416301	9611416302	9611416306	9611416304	9611416305	9611416307	-
Air Cylinder	9611417580	9611417580	9611417580	9611417580	9611417580	9611417580	1
Rotating Cylinder	9611416380	9611416380	9611416380	9611416380	9611416380	9611416380	2
Piston	9612194401	9612194401	9612194401	9612194301	9612194301	9612194301	3
O-Ring, NBR	9611990052	9611990052	9611990052	9611990052	9611990052	9611990052	4
End Cap	3135707401	3135707401	3135707401	3135707401	3135707401	3135707401	5a
Retaining Ring	9611402021	9611402021	9611402021	9611402021	9611402021	9611402021	6
O-Ring, NBR	9611990396	9611990396	9611990396	9611990396	9611990396	9611990396	7
Inner Spring	9611991629	9611991629	9611991629	969119913629	9611991629	9611991626	8
Outer Spring	9611991631	9611991631	9611991631	9611991631	9611991631	9611991631	9
Needle Bearing	9611991230	9611991230	9611991230	9611991230	9611991230	9611991230	10
Needle Bearing	9611991231	9611991231	9611991231	9611991231	9611991231	9611991231	11
Thrust Bearing	9611991236	9611991236	9611991236	9611991236	9611991236	9611991236	12
Trust Plate	9611416460	9611416460	9611416460	9611416460	9611416460	9611416460	14
O-Ring, NBR	9611991233	9611991233	9611991233	9611991233	9611991233	9611991233	15
Connex Pin	9611991235	9611991235	9611991235	9611991235	9611991235	9611991235	16
Coupling	9611416440	9611416450	9612044703	9611416440	9611416450	9612044703	17
Activating Ring, Noryl w/ Screw	9611416690	9611416690	9611416690	9611416690	9611416690	9611416690	18
Water Rejector	9611417750	9611417750	9611417750	9611417750	9611417750	96114717750	19
Actuator, Complete for Altop	9611416781	9611416782	9611416786	9611416784	9611416785	9611416787	-
End Cap, Mark III (for Altop)	9611416740	9611416740	9611416740	9611416740	9611416740	9611416740	5b