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  Products & Services   »  Sanitary   »  Alfa Laval   »  Tank Equipment

Circular Types LKDS and LKDC

When you need a High Quality Opening
Oval Type LKDAccess Tank Cover -
Upper. LKD 320 x 440 with hinge and LKD 20" x 16" manhole cover. Lower. LKD 18" x 14" with angle-shaped frame and flat frame.


The oval Access Tank Cover LKD manhole covers are used on tanks or containers where a closeable means of access to the interior of the vessel is required.
The particular cover has been designed taking into account today’s demands for manhole covers which are suitable for CIP cleaning processes and where access to the tank is only necessary for occasional inspection

Working principle

Open the cover by loosening the handle. For inspection purposes the cover can then be turned into the tank. If it is necessary to physically enter the tank, the cover can be removed at the double hinge or swung out of the tank, depending on the model. The seal is hygienically positioned and is not affected by positive or negative pressure in the tank.


TypeLKD 12" x 17"LKD 20" x 16"LKD 18" x 14"
Steel parts1.4301( 304) or
1.4404 (316L)
Cover and frame are supplied
with inspection certificat 3.1.B according EN10204
1.4301 (304) or
1.4404 (316L)
Cover and casing are
supplied with inspection
certificate 3.1.B according
Cover and frame:
1.4301 (304) or
1.4571 (316Ti)
supplied with inspection
certificate 3.1.B according
Other steel parts:
1.4301 (304)
SealNitrile (NBR) in a quality
approved by the food
Nitrile (NBR) in a quality
approved by the food
Nitrile (NBR)

Technical data

<>* The above values apply for non-pressure manhole cover, type LKD and LKDI.
TypeLKD 12" x 17"LKD 20" x 16"*LKD 18" x 14"LKD-P PED approved
Max. static pressure 22 PSI (1.5 bar)36 PSI (2.5 bar)29 PSI (2 bar)43 PSI (3 bar)
Max. negative working pressure7 PSI (0.5 bar) 7 PSI (0.5 bar)7 PSI (0.5 bar)7 PSI (0.5 bar)
Test temperature  68°F68°F
Installation LKD 12" x 17"Installation of LKD 510x410
Welding of manhole cover LKD 12" x 17" into insulated tank.
Installation LKD 20" x 16"

In order to obtain a perfect seal and a good function of our manhole covers, it is essential that the welding of the casing is carried out carefully and correctly. If the cover is fitted on a vertical tank wall, the hinge of the casing must always be placed on the lefthand side. For thin-gauged containers, ie. sheet thickness less than 2.5 mm, welding is easier if the hole is marked in such a way that a 10 mm edge can be burred up as sharply as possible.
When the hole is cut and the edge burred up, if applicable, the casing is inserted, and tack-welding is now carried on at points placed opposite each other all the way round, in the sequence shown in fig. 4.
The casing may now be fully welded on both sides. A control should be made by removing the rubber seal, and cover and casing should be assembled loosely to ensure that they fully contact each other over the whole surface.
Any stresses are removed by hammering the sheet around the casing.

Installation LKD 18" x 14"

1. Remove seal form cover.
2. Fit cover with hinge in frame.
Please note the dimensions shown.
PED approved version, LKD-P
3. Weld hinge to frame.
Left-hand hinge to the left and right-hand hinge to the right.
<>** On request
Frame thickness (inch)Cover (inch)Max. working pressure (PSI)
at max. working temperature
Max. negative working pressure (PSI)
0.120.1244 PSI7.3
0.390.1244 PSI7.3

Option LKD 12" x 17"

  • - Seal of EPDM rubber.


Please state the following:
- Cover type.
- Steel part material: 1.4301 (304) or 1.4404 (316L).
- Seal ring material type: Nitrile or EPDM.
- Frame height

Dimensions (inch)

TypeLKD 12" x 17"LKD 20" x 16"LKDI 20" x 16"LKTD 20" x 16"LKTDI 20" x 16"LKD flat 18" x 14"LKD angled 18" x 14"
C 26.1826.1826.1826.1819.9220.35
E 9.0610.249.0610.246.308.66
E      11.42
F      3.94
Weight (kg)17.6541.8952.9168.3474.96  

Weights (lb) LKD 18" x 14"

Angle shaped frame70/3 (F/t)17
Angle shaped frame70/4 (F/t)23
Angle shaped frame100/3 (F/t)19
Angle shaped frame100/ (F/t)425
Angle shaped frame140/3 (F/t)30
Angle shaped frame140/4 (F/t)39
Flat frame10 x 3015
Cover3 (t)15
Cover4 (t)29
Handle + clamp arm 12
Hinge 9LKD 12" x 17"
 LKD 18" x 14" angleshaped frame
LKD 20" x 16"LKD 18" x 14" flat frame



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