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K31 is a three piece single acting sealing set which consist of one elastomeric main sealing element with additional sealing lip , one special prole elastomer nitrile rubber that goes into the main sealing component and one thermoplastic back-up ring. 

PRODUCT ADVANTAGES
• Able to work in high pressures
• Superior sealing effect in low pressures
• Easy assembly into closed grooves
• Superior sealing effect with the secondary lip
• Secondary sealing lip provides extra protection against the ingress of dirt particles.
•High wear resistance
•Improved sealing gap due to the active back-up ring

APPLICATION
Mining equipment , iron and steel industry , metal injection machines , scrap cutters , marine hydraulics , cranes and mobile hydraulics.

MATERIAL   CODE
NBR 70 SHORE A NB7001
PU 94 SHORE A PU9401
POM   PM9901
OPERATING CONDITIONS
MEDIA Mineral oils(DIN 51524)  HFA ve HFB HFC
TEMPERATURE -30°C +100°C +5°C +50°C -30°C +40°C
PRESSURE ≤630 Bar ≤630 Bar ≤630 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 sealing element must be oiled with system oil.

NOTES
K31 can be used in all type of cylinders safely due to the reason of perfect adaptation to the pressure changes.

MINUMUM DIAMETER VALUES FOR CLOSED TYPE OF GROOVES
(D-d)/2 (mm) ≤7.5 10 12.5 15
dmin (mm) 50 80 100 105
PERMISSIBLE SEALING GAP
 Pressure (Bar)     Smax (mm)                 
150 1.0
250 0.8
400 0.6
630 0.4
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 ที่เหมาะกับการใช้งานใช้งานMining equipment , iron and steel industry , metal injection machines , scrap cutters , marine hydraulics , cranes and mobile hydraulics.
Temperature Range Min °C-30
Temperature Range Max °C100
Max Pressure630
หน่วยวัดmm
แบรนด์Kastas
I.D. เส้นผ่านศูนย์กลางวงใน65
OD เส้นผ่านศูนย์กลางวงนอก(มม)80
THK ความหนา9
TypeK31 HEAVY DUTY
Part NOK31-065/1
วัสดุ(Material)NBR, PU, POM-C
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SKU
HS-WP-0310
฿226.00

K31 HEAVY DUTY SEAL 65X80X9 PU

Hydraulic Rod Sealing Elements / K31

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