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Piston layer sealing ring UWt (substitute 730)

  • Item 1: Internal sealing ring (sealing part – material: thermoplastic polyurethane TPU, hardness 90±2 ShA)
  • Item 2: External sealing ring (sealing part – material: thermoplastic polyurethane TPU, hardness 90±2 ShA)
  • Item 3: PPW anti-extrusion ring (material: polyacetal POM)

Conditions of use​

Operating pressure [MPa] 32 75 100
Continuous exposure temperature [°C] 80 50
Smax. [mm] 0.7 0.4 0.3
  • Hydraulic medium:
    • mineral oils
    • oil-water emulsions HFA and HFB classes (e.g., Solsenic, Isosynth, Inwex)
  • Maximum operating speed [m/s]:
    • continuous: 0.2
    • intermittent: 0.5

Ordering example​​​​​​​

  • UWt Ring 320 × 290 × 24
    (D × d × W)

Comments

  1. Special versions of seals are available:
    • for continuous operation (in oil) at temperatures up to 100 °C.
    • with nominal dimensions other than those specified in the standard range, e.g., GxW 17.5 × 24.
    • for repair purposes, oversized standard sizes are offered with dimensions D+1.2; D+2.5; D+3.8; D+5.0 [mm].
Type sizeDxdxW Outside diameterD Inside diameterd Groove widthL Assembly chamfera
75x55x13.5+2xPO 75x55x4//755523.010.0
90x75x12907513.510.0
100x85x121008513.510.0
120x105x14.512010516.010.0
135x120x14.513512016.010.0
160x145x14.516014516.010.0
170x145x2317014525.010.0
180x160x14.518016016.012.5
200x175x23+PO 200x175x4//20017528.012.5
200x180x1820018020.012.5
210x190x14.521019016.012.5
220x195x14.522019516.012.5
220x200x1922020020.512.5
230x205x2323020525.012.5
240x215x2324021525.012.5
250x225x2325022525.012.5
260x235x2326023525.012.5
260x235x23+PO 260x235x5//26023530.012.5
270x245x2327024525.012.5
275x250x2327525025.012.5
280x255x2328025525.012.5
285x260x2328526025.012.5
290x265x2329026525.012.5
300x275x2330027525.012.5
320x290x23+PO 320x290x5//32029030.012.5
330x305x2333030525.012.5
350x320x23+PO 350x320x5//35032030.012.5
360x330x2336033025.012.5
370x340x23+PO 370x340x5//37034030.012.5
380x350x24+PO 380x350x5//38035032.012.5
390x360x23+PO 390x360x5//39036030.012.5
400x370x24+PO 400x370x5//40037032.012.5