GER is a two piece double acting piston seal which consists of one special mixture PTFE profile ring and an o-ring as energizing element..
Injection moulding machines , fork-lift trucks , loading platforms , cranes , agricultural machinery and valves for hydraulic and pneumatic systems.
We recommend using special assembly tool (See section; Hydraulic Sealing Elements General Installation Information) and to have open groove design for dimensions that are smaller than Ø 40 mm. 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: It is recommended to use with minimum two piston guide rings in long stroke cylinders, minimum one guide ring in short stroke and under low radial loads. For special applications that require high temperatures or resistance to chemicals , piston seal is being manufactured with special mixture PTFE and FPM material. The permissible sealing gap values of GER piston seal is given in the below table.
|PERMISSIBLE SEALING GAP Smax(mm)|
|B (mm)||150 Bar||250 Bar||600 Bar|
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: PTFE / NBR 70 SH|
|MEDIA||Mineral oils(DIN 51524)||HFA and HFB||HFC|
|TEMPERATURE||-30°C +100°C||+5°C +50°C||-30°C +40°C|
|PRESSURE||≤600 Bar||≤600 Bar||≤600 Bar|
|SPEED||≤15.0 m/sn||≤15.0 m/sn||≤15.0 m/sn|
Note: The above data are maximum values and cannot be used at the same time.
|Sliding Surface ØD-Ød||≤0.2 μm||≤2.0 μm|
|Groove Base ØDb-Ødp||≤1.6 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.
CB = Custom build (price on request)
* = Stock item
Stock = 0 (and not a Stock* or CB product) -> minimum item value € 10.00