Code Description D(H11) d(h11) b B(-0/+0.2) n

K23

K23 is a single acting piston seal designed to have outer lip shorter than the inner lip in order to be used for piston applications.

PRODUCT ADVANTAGES
• Superior static and dynamic sealing effect
• Wide range of dimensions
• Easy assembly into closed grooves
• Simple groove design
• Economical sealing solution

APPLICATION
Construction machinery , fork-lift trucks , injection moulding machines , agricultural machinery , loading platforms and standard cylinders.

INSTALLATION
Easily assembled into closed grooves according to the minimum diameter values that are given in the below table. Open grooves or special assembly tools should be used for the values that are outside this table. It is very important that the assembly tools must be of soft material and have no sharp edges. Before installation the sealing element must be oiled with system oil.

 

MINIMUM DIAMETER VALUES FOR CLOSED TYPE OF GROOVES

(D-d)/2 (mm)

4 5 6 7.7 10 12.5 15

D min (mm)

25 30 40 50 80 100 105

 

MATERIAL   CODE
NBR 90 SHORE A NB9001

OPERATING CONDITIONS

NBR

MEDIA

Mineral Oils
(DIN 51524)

HFA and
HFB

HFC

TEMPERATURE

-30°C
+105°C

+5°C
+60°C

-30°C
+60°C

PRESSURE

≤150 Bar

≤150 Bar

≤150 Bar

SPEED

≤0.5 m/sn

≤0.5 m/sn

≤0.5 m/sn

Note: The above data are maximum values and cannot be used at the same time.

SURFACE ROUGHNESS

Ra

Rmax

Sliding Surface ØD

≤0.4 μm

≤3.2 μm

Groove Base Ød

≤1.6 μm

≤10 μm

Groove Flanks B

≤3.2 μm

≤16 μm

Note: It is recommended to have 50% to 90% of the working surface material contact area value.

PERMISSIBLE SEALING GAP

NBR

Smax (mm)

t=(D-d)/2 (mm)

50 bar

100 bar

150 bar

t≤5

0.40

0.20

0.10

t>5

0.45

0.25

0.15

Note: The largest sealing gap value occurring on the non-pressurized side of the seal does have a vital importance for the function of the seal and in this respect it is quite important to use the S value lower than the above indicated numbers.

 

NOTES
For special applications that require high temperatures , K23 can be produced in FKM material.

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