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Combined piston sealing ring USmt

Combined piston sealing ring USmt

Item 1 Modified sealing ring USm
(sealing part – material: thermoplastic polyurethane TPU, hardness 90±2 ShA)

Item 2 Anti-extrusion ring PPW //
(material: polyacetal POM)

Working pressure [MPa] 16 25 50 75
Continuous exposure temperature [°C] 80 50
Smax W=8 [mm] 0.5 0.3 0.3 0.2
W=12 1.0 0.5 0.5 0.4
W=15 1.0 0.5 0.5 0.4
Operating Parameters
  • Hydraulic media:
    • Mineral oils
    • HFA and HFB oil-water emulsions (up to 50°C)
  • Maximum travel speed:
    • Continuous: 0.2 m/s
    • Intermittent: 0.5 m/s

Ordering Example
USmt Ring 125 × 110 × 12
Format: (D × d × W)

Comments
1. Special versions are available for:
      Continuous oil operation up to 100°C
      Non-standard nominal dimensions
2. For piston diameters above 260 mm Use UWt catalog sheets solutions.
Typical size
DxdxW		 Outer diameter
D		 Inner diameter
d		 Groove width
L		 Assembly chamfer
a
60×50×860509,05,0
63×46×863469,05,0
66×56×866569,05,0
73×63×873639,05,0
75×65×875659,05,5
80×70×880709,05,5
90×80×890809,06,0
100×90×8100909,06,0
115×100×1211510013,08,5
120×105×1212010513,08,5
125×110×1212511013,08,5
135×120×1213512013,08,5
140×125×1214012513,08,5
160×145×1516014513,08,5
160×140×1516014016,59,5
170×150×1517015016,59,5
200×180×1520018016,59,5
210×190×1521019016,510,5
220×200×1522020016,510,5
260×240×1526024016,512,5
Typical size
DxdxW		 Outer diameter
D		 Inner diameter
d		 Groove width
L		 Assembly chamfer
a
110×100×12110100138,5
115×105×12115105138,5
120×110×12120110138,5
125×115×12125115138,5
135×125×12135125138,5
140×130×12140130138,5
155×140×1515514016,59,5
160×145×1516014516,59,5
165×150×1516515016,59,5
170×155×1517015516,59,5
195×180×1519518016,510,5
200×185×1520018516,510,5
205×190×1520519016,510,5
210×195×1521019516,510,5
215×200×1521520016,510,5
220×205×1522020516,510,5
235×220×1523522016,510,5
250×235×1525023516,512,5
255×240×1525524016,512,5