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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)

Conditions of use​

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
  • 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.

Type size (DxdxW) Outer diameter (D) Inner diameter (d) Groove width (L) Assembly chamfer (a)
60x50x860509.05.0
63x46x863469.05.0
66x56x866569.05.0
73x63x873639.05.0
75x65x875659.05.5
80x70x880709.05.5
90x80x890809.06.0
100x90x8100909.06.0
115x100x1211510013.08.5
120x105x1212010513.08.5
125x110x1212511013.08.5
135x120x1213512013.08.5
140x125x1214012513.08.5
160x145x1516014513.08.5
160x140x1516014016.59.5
170x150x1517015016.59.5
200x180x1520018016.59.5
210x190x1521019016.510.5
220x200x1522020016.510.5
260x240x1526024016.512.5
Type size (DxdxW) Outer diameter (D) Inner diameter (d) Groove width (L) Assembly chamfer (a)
110x100x12110100138.5
115x105x12115105138.5
120x110x12120110138.5
125x115x12125115138.5
135x125x12135125138.5
140x130x12140130138.5
155x140x1515514016.59.5
160x145x1516014516.59.5
165x150x1516515016.59.5
170x155x1517015516.59.5
195x180x1519518016.510.5
200x185x1520018516.510.5
205x190x1520519016.510.5
210x195x1521019516.510.5
215x200x1521520016.510.5
220x205x1522020516.510.5
235x220x1523522016.510.5
250x235x1525023516.512.5
255x240x1525524016.512.5