V-Seal Set R04
DESCRIPTION (1) – Pressure ring is a base ring that hold the V-rings in set and with them provide effective sealing. Pressure ring is manufactured in fabric impregnated with rubber (2) – V-Rings are manufactured in fabric impregnated with rubber (3) – Support ring are made in rubber reinforced fabric or in polyacetal resine – POM. In the set R03 Support ring distribute axial force energizing each individual component and pressed them into positive contact with the rod, gland surfaces and pressure ring, providing the sealing. V-Seal Set R03 is reliable even under exstreme operating conditions and has excellent behavior in harsh conditions. R03 has exceptional wear resistance and due to pre-load adjustment capability has long service life.
Chevron seal set R04 for sealing piston rods. Set includes five (n=5), or six (n=6), or seven (n=7) pieces: Pressure ring, Support ring, and V-rings in quantity till number (n)
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APPLICATION
Mining equipment
Injection molding machines
Presses
Escavator cylinders
Steel mill cylinders
Water hydraulics
MATERIAL
| Material | ||
|---|---|---|
| Material Set Code, standard | SN102 | SF106 |
| Rubber | NBR | FKM |
| Fabric reinforcement | Cotton | Cotton |
For very low temperature applications up to -60 C, or excellent oils-rubber compatybility in special applications a few materials are recommended and available on request.
| Pressure, Speed | |
|---|---|
| Working pressure, P | 40 MPa |
| Running speed, v | 0,5 m/s |
| Medium, Working Temperature | ||
|---|---|---|
| Material Set Code | SN102 | SF106 |
| Hydraulic oils: HL, HLP | -30.. +100 ˚C | -15.. +150 ˚C |
| HFA, HFB fluids | +5..+60 °C | +5..+60 °C |
| HFC fluids | -30..+60˚C | -15.. +60 ˚C |
| HFD fluids | – | -15.. +150 ˚C |
| Water | +5..+100 °C | +5..+ 80 ˚C |
| Mineral greases | -30..+100°C | -15.. +150 ˚C |
| Tolerances | ||
|---|---|---|
| Ød | Clearance fit, emax | ØD |
| > 120 to 500 | H8/f7 | H11 |
| > 500 to 630 | H8/f7 | H10 |
| > 630 to 800 | H8/f7 | H10 |
| > 800 to 1000 | H8/f7 | H10 |
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*Contact area Mr = 50% to 90% at cutting depth c=Rz/2 and reference line Cref=0% Gland length, L Adjustable housings have the advantage of allowing adjustments of the axial force applied to the seal set. After a long period of operation and the occurrence of seal wear, this type of housing allows tightening of the seal and prolonging its service life. For adjustable housings, it is recommended to extend the installation site by 2.5% and the possibility of subsequent adjustment of 7.5% from the “L” dimension, by installing a washer.
Surface quality*
Surface roughness
Ra
Rmax
Sliding surfaces, a
0,05 to 0,3μm
≤ 2,5 μm
Groove base, b
≤ 1,6 μm
≤ 6,3 μm
Groove flanks, d
≤ 3,0 μm
≤ 15 μm
Chamfer, f
≤ 4,0 μm
≤ 16 μm