Home About us Press FAQs Contact Us Testimonials
Search: 

Quality Brands                        Quality Products                           Quality Service

Products
 
 
Address
Industrial Trading Solutions Limited
6 Station Road
Coleshill
Birmingham
B46 1HT

Tel: 01675 465191
Fax: 01675 464429
 
 

Alfa Laval Hygienic LKB Butterfly Valve.

Print   Print this page      Email   Email to a friend
ITS Logo

Manual or Automatic - it's your Choice

LKB Automatic or Manual Butterfly Valve

Application
LKB1LKB is a sanitary automatically or manually operated butterfly valve for use in stainless steel pipe systems.
 
Working principle
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, enables adjusting of the valve, so that the flow rate can be regulated.
 
Standard design
LKB is available in three versions, LKB for ISO 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.
 
Two actuator sizes, ¸85mm and ¸133mm, 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.
 
Control Equipment
Control and indication is possible in connection with the remote-controlled LKB valve. See "Options".
LKLA-T can be fitted with ThinkTop®.
 
Torque diagrams - Actuator
LKB2
Torque values (for rotating the valve disc in a dry seal ring)
LKB3
Angular motion of actuator:
1. Closing - Spring activated
2. Opening - Air activated
3. Closing - Air activated
4. Opening - Spring activated
5. Closing
6. Opening
 
Fig. 1. Dimensions - valve.
LKB4
Dimensions (mm) - Valve
LKB, LKB-2, LKB-F:
LKB5
NOTE! Weights are for valves with welding ends and handles.
 
Dimensions (mm) - Actuator
LKLA and LKLA-T:
LKB6
Connections
Compressed air
R1/8" (BSP), internal thread.
 
Capacity/Pressure drop diagrams
LKB7
NOTE!
For the diagrams the following applies:
Medium: Water (20°C).
Measurement: In accordance with VDI 2173.
 
Technical Data
Valve:
Max. product pressure: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1000 kPa (10 bar).
Min. product pressure: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Full vacuum.
Temperature range: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-10°C to +95°C.
 
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.
Air consumption (litres free air) - ¸85mm: . . . . . . . . . . . . . . . . . . . . . .0.24 x p (bar).
Air consumption (litres free air) - ¸133 mm: . . . . . . . . . . . . . . . . . . . . .0.95 x p (bar).
Weight: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .- ¸85 mm: 3 kg. - ¸133 mm: 12 kg.
 
Materials
Valve:

Productwetted steel parts: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.4307 (304L) or 1.4404 (316L).
Other steel parts: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.4307 (304L).
Rubber grades: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Silicone rubber (Q), EPDMor Fluorinated rubber (FPM), HNBR, PFA.
Bushes for valve disc: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PVDF.
Finish: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Semi-bright.
 
Actuator:
Actuator body: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Stainless steel 1.4307 (304L).
Piston: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Light alloy (for ¸85 mm: Bronze). Air/air version.
Seals: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Nitrile (NBR).
Housing for switches: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Noryl (PPO).
 
Seal Qualities

PFA:
PFA is a bonded seal in the PTFE family consisting of an EPDM seal with an outside PFA liner. The chemical resistance of PFA is very similar to PTFE, but opposite to those PFA is thermo plastic and has minimal porosity. The seal has high mechanical strength which makes it a perfect choice when dealing with abrasive products. Furthermore, the design of the PFA seal minimizes the risk of worn seal. Another advantage of the PFA seal is that the service intervals are prolonged due to a longer lifetime for the seal. The maximal temperature for the PFA seal is 90°C (194°F).
The seal is available in the following sizes: ISO:38, 51, 63.5, 76.1, 101.6 and DIN: 40, 50, 65, 80, 100.
The PFA seal rings fit the LKB-F sizes for ISO and are available as spare. The flange seals are not available in PFA, please select available rubber quality.
EPDM:
The EPDM seal is mechanically strong and normally resistant to ozone and other strong oxidizers, animal and vegetable fats, polar solvents, Acids and bases, water and aqueous solutions.
The seal is available in all sizes.
 
Silicone:
Normally resistant to ozone, other strong oxidizers and strong bases. The seal is available in all sizes.
 
FPM:
Normally resistant to ozone and other oxidizers, hydrocarbons in general, oils, lubricants and greases.
The seal is available in all sizes.
 
HNBR:
Mechanically strong and normally resistant to ozone and strong oxidizers, animal and vegetable fats, nonpolar solvents, oils and lubricants, water and aqueous solutions.
The flange seals are not available in HNBR, please select available rubber quality.
For further information on Product- and Chemical Resistance of Flexible Rubber Materials, please see PD sheet 65036.
 
Options
A. Male parts or clamp liners in accordance with required standard.
B. ThinkTop® for control and indication.*
C. Indication unit with micro switches.*
D. Indication unit with inductive proximity switches.*
E. Indication unit with Hall proximity switches.*
F. Explosion proof indication unit with inductive proximity switches.*
G. Bracket for actuator. (Also for ball valves).
H. Handle with two or four positions (standard on DN125 and DN150).
I. Handle for electrical position indication.
J. Handle with infinite intermediate positions (not for DN125 and DN150).
K. Multipositioning handle**.
L. Lockable Multiposition Handle. Padlock can be mounted as shown in fig. 5.
Note! Padlock is not delivered.
M. Special cap for 90° turned handle position.
N. Service tool for actuator.
O. Service tool for fitting 25-38 mm (DN25 - DN40) valve discs.
* For further information see Product Catalogue chapter "Control & Indication".
** A padlock can be mounted on the Lockable Multiposition Handle as shown in the opposite figure.

Note! Padlock is not delivered.
LKB8
Fig. 3. Lockable Multiposition Handle with padlock.
 
1. Padlock
LKB9
Fig. 4. Dimensions - padlock.
A. Min. 20 mm
B. Min. 35 mm
C. ¸6 mm
LKB10
Fig. 5. Positioning cap.
1. On/Off
2. Multi positioning
 
Ordering
Please state the following when ordering:
- Valve type: LKB, LKB-2 or LKB-F.
- Valve size.
- Connections, if not welding ends.
- Materials: 1.4307 (304L) or 1.4404 (316L).
- Rubber grade: EPDM, Silicone (Q), Fluorinated rubber (FPM), HNBR or PFA.
- Type of handle, if required.
 
If ordering with actuator:
- Type: LKLA or LKLA-T.
- Size: ¸85mm or ¸133mm.
- Function: NC, NO or Air/Air.
- Other options.
 
Note!
For further details, see also IM 70730.
Some of our Suppliers
                                                                                                                    
Web Design Birmingham and Search Engine Optimisation (SEO) developed by EvolveNet