Seals
The piston seal is a two-way seal, used in conjunction with two piston guide rings, and has a two-way sealing effect. It is wear-resistant, high-pressure-resistant, has good sealing performance, and is easy to install. It is used for double seals of pistons in reciprocating hydraulic cylinders and multiple groups of hydraulic cylinders. It is an ideal seal in mining support.
Description
Piston seal is made up of L guide ring, seal body and elastic body of three parts, stable structure, good seal performance, especially suitable for High pressure, usually for standard hydraulic cylinder.
pressure: ≤70Mpa
speed: ≤0.5m/s
temperature: -30℃～+110℃
Medium: hydraulic oil, emulsion, water
pressure: Mpa 16～130
Maximum extrusion clearance(mm): 0.75～0.25
The surface of the cylinder: φD1 0.1-0.4 μm Ra
The static sealing surface: φd1 1.6max μm Ra
Static groove surface: L1 3.2max μm Ra
Groove part: ≤ S (mm) 6, 8, 10, 12.5, 15
Minimum slope: C (mm) 4, 4, 5, 6, 7
Maximum amount of chamfering: r1 (mm) 0.2, 0.2, 0.2, 0.4, 0.4, 0.5
The biggest outer diagonal: r2 (mm) 0.4, 0.4, 0.4, 0.5, 0.5
sealing member: PU
elastomer: NBR
POM (Support ring: POM
Low friction, even holding a long time, the campaign starting and moving smoothly;
Static and dynamic sealing performance is very good;
Easy to install;
Sealing ring
material:PU98A-68H136
HFA fluid/water:-30℃~+100℃
pressure:≤40Mpa
Linear velocity:≤0.5m/s
O-Ring
P-material:NBR 70A-98C117
HFA fluid/water:-30℃~+100℃
pressure:≤40Mpa
Linear velocity:≤0.5m/s
| Ra | |
| The surface of the cylinder | 0.05-0.30 |
| Groove bottom | 1.8 max |
| Groove side | 3.2 max |
| Rmax | |
| The surface of the cylinder | ≤2.5 |
| Groove bottom | ≤ 10 |
| Groove side | ≤ 16 |
| Section size | The allowable maximum 2 e gap size) | |||
| 16Mpa | 25Mpa | 32Mpa | 40Mpa | |
| 4.2 | 0.40 | 0.30 | 0.20 | - |
| 6.3 | 0.50 | 0.40 | 0.30 | 0.25 |
| 8.1 | 0.60 | 0.50 | 0.40 | 0.35 |
Specification
| MaterialMain seal material | Power-transmission fluidTransmission media | TemperatureTemperature range ℃ | Speedspeed | PressureWork Pressure |
| HPU95ANBR/POMPolyurethaneNitrile rubberPolyoxymethylene | Mineral oilMineral oil | -30~+110 | 0.50m/s | 400 bar |
| HFC Water GlycolWater glycol | -30~+60 | 0.15m/s | 700 ar | |
| HFA5/95 Water base fluid，WaterWater-based transmission fluid/water | +5~+60 |
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