Alfa Laval LKB User Manual

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6 Technical data
It is important to observe the technical data during installation, operation and maintenance.
Inform personnel about the technical data.
NC = Normally closed. NO = Normally open. A/A = Air/air activated.
6.1 Technical data
LKB is a sanitary automatically or manually operated butterfly valve for use in stainless steel pipe systems.
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 handles for the valve sizes
DN125 and DN150, which are designed for locking in two intermediate positions, enable adjusting of the valve, so that the
flow rate can be regulated.
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Max. product pressure
1000 kPa (10 bar) (145 psi)
Min. product pressure
Full vacuum
Temperature range
-10° C to +140° C* (EPDM )
However max. 95° C when operating the valve
Product acc. to PED 97/23/EC
Fluids group 2
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Product wetted steel parts
AISI 304 or AISI 316L
Other steel parts
AISI 304
Rubber grades
EPDM, Silicone (Q), Viton (FPM), HNBR, PFA
Bushes for valve disc PVDF
Finish
Semi-bright
Inside surface finish
≤Ra 0.8 µm
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Max. air pressure
600 kPa (6 bar) (87 psi)
Min. air pressure, NC or NO 400 kPa (4 bar) (58 psi)
Temperature range
-25° C to +90° C (-13°F to +194°F )
Air consumption (litres free air)
- ø85 mm
0.24 x p (bar)
- ø133 mm
0.95 x p (bar)
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Actuator body
AISI 304
Piston
Light alloy, bronze for ø85 mm A/A
Seals
Nitrile (NBR)
Housing for switches
Noryl (PPO)
Finish
Semi bright
26

Alfa Laval LKB Specifications

General

Brand	Alfa Laval
Model	LKB
Category	Control Unit
Language	English