K22 U-RING 250X270X12 PU

K22 is a single acting rod seal designed to have inner lip shorterthan the outer lip in order to be used for rod 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 mouldingmachines , agricultural machinery , loading platforms and standardcylinders.

MATERIAL		CODE
NBR	90 SHORE A	NB9001
PU	92 SHORE A	PU9201

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
PU
MEDIA	Mineral oils(DIN 51524)	HFA and HFB	HFC
TEMPERATURE	-30°C +100°C	+5°C +50°C	-30°C +40°C
PRESSURE	≤400 Bar	≤400 Bar	≤400 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.

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 rod seal must be oiled with system oil.

MINUMUM DIAMETER VALUES FOR CLOSED TYPE OF GROOVES
(D-d)/2 (mm)	4	5	6	7.7	10	12.5	15
dmin (mm)	25	30	40	50	80	100	105

NOTES
For special applications that require high temperatures , K22 can be produced in FKM material.

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

PU	Smax (mm)

t=(D-d)/2(mm)	150 Bar	250 Bar	400 Bar
t≤5	0.30	0.20	0.15
t>5	0.35	0.25	0.20

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.

More Information
น้ำหนัก/หน่วย (กก.)	0.1000
Application หรือ MEDIA ที่เหมาะกับการใช้งานใช้งาน	Construction machinery , fork-lift trucks , injection mouldingmachines , agricultural machinery , loading platforms and standardcylinders.
Temperature Range Min °C	-30
Temperature Range Max °C	100
Max Pressure	400 bar
หน่วย	PCE
หน่วยวัด	mm
แบรนด์	Kastas
I.D. เส้นผ่านศูนย์กลางวงใน	250
OD เส้นผ่านศูนย์กลางวงนอก(มม)	270
THK ความหนา	12
Type	K22
Part NO	K22-250/1 PU
วัสดุ(Material)	PU

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