GDF Combination Seals

Function and Usage
GDF Combination Seal is composed of a polyurethane slip ring and a square rubber ring. With the high hardness, the polyurethane slip ring can not be extruded when system pressure is increasing, and also, the friction coefficient is small. There is a concave structure on the sealing surface to form a lubricating oil cavity, reduce the friction resistance during the movement; The square rubber ring provides preload, compensate to the wear of the slip ring. Rubber elastomer transmission pressure sensitive, with good dynamic and static sealing effect. GDF Combination Seal is widely used crane hoist brake sealing system.
 
Advantage
--Wear resistance, long service life
-- Good sealing effect
--Simple trench, easy to install
--With a lubrication chamber
 
Material
Slip Ring Material: Polyurethane   Our Material Code: P903
Elastomer Material: Nitrile Rubber (NBR)   Our Material Code: N800  
Combination Code: P903N
 
If the working condition is under low temperature, we suggest to use low temperature resistance Nitrile Rubber (NBR) for the elestomer , Our Material Code: NV705, Combination Code: P903NV
 
Technical Data
Working Pressure: ≤25MPa
Speed: ≤0.5m/s  
Working Temperature: Nitrile Rubber (NBR)   -35℃ to +120℃ 
                   Polyurethane   -35℃ to +110℃ 
Working Medium: Hydraulic oil.
Tips: Limit value of the above data, can not be used at the same time. The maximum working pressure depends on the type of material, the pressure, the temperature, the gap, and etc.. In actual usage, due to the mutual influence of working parameters, the maximum value setting is lower.
 
Installation
Groove: Closed
In order to avoid the damage of the seals, during the installation, the seals should be leave away with the shape edge of the parts and tools. The sharp edges and burr in the installation area of the seal must be removed.
 
Example of the Order Part No. :
GDF Combination Seal
Series No.:GDF  Cylinder Diameter: d=90mm 
Part Number: GDF090101P903N
GDF : Series Number
090: Cylinder Diameter
101: Groove Diameter
P903N: Material Code

GDF Combination Seal
d	D	L	C	Part No.
86	96	6	8	GDF086096
90	101	6	8	GDF090101
93	103	6	8	GDF093103
103	113	6	8	GDF103113
112	122	6	8	GDF112122
132	142	6	8	GDF132142
136	146	6	8	GDF136146
If any special requirements of the materials and sizes, please contact with us.