BN S8 is a single acting rod seal which consists of reinforced cotton fabric and nitrile rubber vulcanized together forming an integral sealing element, for piston only used with open groove.

PRODUCT ADVANTAGES

• ​Functions even with poor surfaces
• Wide range of dimensions
• Easy assembly into closed grooves
• Reinforced cotton fabric base prevents the seal from deformation
• Good sealing at low pressures

APPLICATION

Low to medium duty hydraulic cylinders , mobile hydraulics and presses.

MONTAGE

Easily assembled into closed grooves , for piston only used with open groove.  It is very important that the assembly tools must be of soft material and have no sharp edges. Before installation the BN S8 must be oiled with system oil.

Note: The permissible sealing gap values of BN S8 rod seal is given in the below table.

PERMISSIBLE SEALING GAP           Smax(mm)
t=(D-d)/2	150 Bar	250 Bar	400 Bar
	0.20	0.10	XX

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. 

MATERIAL: NBR 80 SH / NBR FABRIC

OPERATING CONDITIONS
MEDIA	Mineral oils(DIN 51524)	HFA and HFB	HFC
TEMPERATURE	-30°C +105°C	+5°C +60°C	-30°C +60°C
PRESSURE	≤250 Bar	≤250 Bar	≤250 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-Ød	≤0.4 μm	≤3.2 μm
Groove Base ØDb-Ødp	≤1.8 μm	≤6.3 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.

 

 

 

 

 

 

 

 

 

 

 

 

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