MYP-Packings (Piston packings)

Standard Material: NBR(RN722)

Profiles (Left section)


Service range

Standard Material
Material codes Pressure MPa {kgf/㎠} Max. speed
Temperature range
1 {10} 0.5 ー20~60

Material codes・The range with [ ] refers FKM materials


MYP-Packings are applicable to pistons of small diameters, likewise Mini Y-Packings, interchangeable with O-rings specified by JIS B2401 P-line.
By the slit structure on the lip (for higher sealing stability and prohibition of inverted assembling) and desirable friction properties,
MYP-Packings provide stable sealing performance.


  • ●Packings should be installed in the direction specified on the above schematic.
  • ●Consider adopting split grooves if one-piece groove is technically adverse.
  • ●φD H9/f8 would be modified according to the variation of the bearing structure.
  • ※JIS standard sequence of surface roughness symbols refer to HERE.

Dimension table

Packings & Groove dimensions(Unit:mm) Part No.
D d H G L Standard
(RN 722)
High temperature-resistant
(RF 704)
6 3 2.2 2.5 2 MYP-6 MYP-6F
8 5 2.2 2.5 2 MYP-8 MYP-8F
10 7 2.2 2.5 2 MYP-10 MYP-10F
12 9 2.2 2.5 2 MYP-12 MYP-12F
15 11 2.8 3.2 2.5 MYP-15 MYP-15F
16 12 2.8 3.2 2.5 MYP-16 MYP-16F
20 16 2.8 3.2 2.5 MYP-20-1 MYP-20F
25 21 2.8 3.2 2.5 MYP-25-3  
  • ★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.
  • ★Packings are adequately packaged for the optimum storage. Refer to Cautions for the handling and storage.
  • ★Performance and material tests on packing and seals are also available. Please contact us for more information.