ST-Seals (STS) (Piston packings)

Standard Material: PTFE(PT111)

Profiles (Left section)

STS-2
en_ST-STS

Service range

Standard Material
Material codes Pressure MPa {kgf/㎠} Max. speed
(m/s)
Temperature range
(℃)
PTFE(PT111) STS 10 {100} 1 ー30~100

Characteristics

S-FLON (PTFE) seals & back-up rings are combined to achieve low friction resistance and to eliminate stick slip even at low pressure/speed conditions.
They have moderate sealing performance comparing with U-packings.
Notche introduces pressure energizing seals and activates to obtain the ultimate sealing performance and reliability.
●STS type is designed for low pressure/friction cylinders, with small cross sectional area.

Remarks

  • ●Consider adopting split grooves if one-piece groove is technically adverse.
  • ●For applications without back-up rings, set the φD2 side diameter to φD H9/f8.
  • ●ST-Seals with the notches for seal energizing pressure available for the ultimate sealing performance and reliability.
  • ※JIS standard sequence of surface roughness symbols refer to HERE.

Dimension table

Packings & Groove dimensions(Unit:mm) Part No.
D d H G D1 dw D2 Gw E L Standard material(PT 111)
20 15 1.7 2 19.5 17 19 3 3 2 STS-20
25 20 1.7 2 24.5 22 24 3 3 2 STS-25
30 24 2.2 2.5 29.5 27 29 4 4 2 STS-30
32 26 2.2 2.5 31.5 29 31 4 4 2 STS-32
35 29 2.2 2.5 34.5 32 34 4 4 2 STS-35
40 33.5 2.2 2.5 39.5 36 39 5 4 2 STS-40
45 38.5 2.2 2.5 44.5 41 44 5 4 2 STS-45
50 43.5 2.2 2.5 49.5 46 49 5 4 2 STS-50
55 45.5 3.3 3.6 54.5 51 54 5 6 3 STS-55
60 50.5 3.3 3.6 59.5 56 59 6 6 3 STS-60
63 53.5 3.3 3.6 62.5 59 62 6 6 3 STS-63
65 55.5 3.3 3.6 64.5 61 64 6 6 3 STS-65
70 60.5 3.3 3.6 69.5 66 69 6 6 3 STS-70
75 65.5 3.3 3.6 74.5 71 74 6 6 3 STS-75
80 70.5 3.3 3.6 79.5 76 79 8 6 3 STS-80
85 75.5 3.3 3.6 84.5 81 84 8 6 3 STS-85
90 80.5 3.3 3.6 89.5 86 89 8 6 3 STS-90
95 85.5 3.3 3.6 94.5 91 94 8 6 3 STS-95
100 90.5 3.3 3.6 99.5 95 98 10 6 3 STS-100
  • ★Orders and inquiries are acceptable by part numbers. Part numbers marked ※ have been changed each part numbers. Please check HERE for the previous part number.
  • ★Part numbers in blue letters are the products in stock.
  • ★Packings with the part numbers in light Italic require the confirmation of their availability prior to ordering. These items are subject to the abolishment without notice. Reclamation of an abolished product requires producing the new tooling at your expense.
  • ★ST-Seals are made-to-order products. ST-Seals for inner slide rods and other shapes are available upon request.
  • ★Packings are adequately packaged for the optimum storage. Refer to Cautions for the handling and
  • ★Performance and material tests on packing and seals are also available. Please contact us for more information.