POLYPAC – VEEPAC CH/G5
Veepac is a set of fabric reinforced Chevron rings comprising of a support ring (1), sealing rings (2) and a pressure energising ring (3). In the packing set the energising axial force is transferred between the individual packing rings so that each ring is pressed into positive contact with the rod surface. Additional to the standard material special material grades are available for a large variety of working conditions. The figure shows the Veepac design.
1) “U” or base rings in standard version manufactured in reinforced fabric comprising of layers of cotton impregnated with nitrile rubber compounded to resist extrusion. This component supports the Vee Rings for effective performances.
2) Vee Rings are made of reinforced cotton fabric and nitrile elastomer, in standard version, to give good resilience, sealing efficiency and extrusion resistance.
Due to their specific design, Vee Rings are sensitive to fluid pressure variations, enabling them to deflect throughout their radial section, increase the seal loading and effectiveness in proportion to the pressures applied.
2a)Vee Rings are made of pure elastomer for high sealing efficienty.
3) Energiser or spreader rings are manufactured in acetal resin or PTFE. The function of this component is to ensure a uniform pressure distribution.
– Very robust seal
– Non sensitive
– Easy replacement in the field with split rings
– Extensive range of sizes (see symmetrical seals)
– Requires non super mating surfaces
- Mining equipment (with approvals)
- Steel mills
- Water hydraulic
- Ship hydraulics
- Stabilizer cylinders on cranes
- Continous casting equipment
Pressure: Up to 40 MPa.
Velocity: Up to 0.5 m/s.
Temperature: -30_C to +200_C depending on material.
Media: Hydraulic fluids Mineral oil, water glycol, water emulsions.
The above data are maximum values and cannot be used at the same time. e.g. the maximum operating speed depends on material type, pressure, temperature and gap value.
The following material combination can be supplied:
Lead in chamfers
In order to avoid damage to the Veepac during installation, lead in chamfers of min. 5 x 20_ must be provided on the rods.
The material contact area Rmr should be approx. 50 to 70%, determined at a cut depth c = 0.25 x Rz, relative to a reference line of Cref. 5%.
The gap behind the seal should not be larger than 0.30 mm in diameter.
|Rod Dia.||Groove Dia.||Groove Width||Seal Width||Part No.||Polypac Ref. No.|
|dN f8/h9||D1 H11||L +0.2||B|
|25,0||37,0||22,5||22,5||RCH0G0250||CH 145098 G5|
|25,0||40,0||22,5||22,5||RCH1G0250||CH 157098 G5|
|28,0||40,0||22,5||22,5||RCH0G0280||CH 157110 G5|
|30,0||45,0||22,5||22,5||RCH0G0300||CH 177118 G5|
|36,0||48,0||22,5||22,5||RCH0G0360||CH 188141 G5|
|40,0||55,0||22,5||22,5||RCH0G0400||CH 216157 G5|
|45,0||65,0||27,5||27,5||RCH1G0450||CH 255177 G5|
|50,0||65,0||22,5||22,5||RCH0G0500||CH 255196 G5|
|56,0||71,0||22,5||22,5||RCH0G0560||CH 279220 G5|
|60,0||80,0||37,0||37,0||RCH0G0600||CH 314236 G5|
|65,0||85,0||40,0||40,0||RCH0G0650||CH 334255 G5|
|70,0||85,0||22,5||22,5||RCH0G0700||CH 334275 G5|
|75,0||90,0||22,5||22,5||RCH0G0750||CH 354295 G5|
|80,0||95,0||22,5||22,5||RCH0G0800||CH 374314 G5|
|80,0||100,0||40,0||40,0||RCH1G0800||CH 393314 G5|
|90,0||105,0||22,5||22,5||RCH0G0900||CH 413354 G5|
|90,0||110,0||40,0||40,0||RCH1G0900||CH 433354 G5|
|100,0||115,0||30,0||30,0||RCH0G1000||CH 452393 G5|
|100,0||120,0||40,0||40,0||RCH1G1000||CH 472393 G5|
|110,0||130,0||40,0||40,0||RCH1G1100||CH 511433 G5|
|120,0||145,0||50,0||50,0||RCH0G1200||CH 570472 G5|
|125,0||140,0||34,0||34,0||RCH0G1250||CH 551492 G5|
|125,0||150,0||46,0||46,0||RCH1G1250||CH 590492 G5|
|140,0||155,0||34,0||34,0||RCH0G1400||CH 610551 G5|
|140,0||165,0||46,0||46,0||RCH1G1400||CH 649551 G5|
|160,0||180,0||40,0||40,0||RCH0G1600||CH 708629 G5|
|160,0||190,0||60,0||60,0||RCH1G1600||CH 748629 G5|
Veepac Type RCH_G
Rod diameter: dN = 70.0 mm
Groove diameter: D1 = 85.0 mm
Groove width L = 22.5 mm
Part No.: RCH0G0700 –
Material: N0ONC (standard)