Hydraulic Packings
| Product name [Application] |
Profiles (Left section) |
Material codes | Characteristics | Field of application |
| GPY-Packings [Piston packings] |
  |
RN919 | For those applications, the SKY-packings are used and the improvement of durability becomes an essential issue. The GPY-packings for pistons and the GNY-packings for rods are recommended. With the RN919 wear resistant material and larger cross-sectional area than the SKY- packings of the same dimensions, the GPY piston packings prove to be free from damage by a back pressure and the GNY rod packings obtain higher sealing capability and optimum sealing performance against eccentric movements. |
# Basic cylinders # Cylinders for construction and industrial vehicles |
| GNY-Packings [Rod packings] |  |
RN919 | ||
| RGY-Packings [Piston & rod packings] |  |
RN923 | The grooves of RGY piston packings and RNY rod packings are compatible with those for the SKY-packings. RGY-packings are designed to withstand back pressure and provide longer service time by adopting an improved wear resistant material. RNY rod packings are designed exclusively for sealing rods. RNY rod packings made of a highly elastic compound achieve good sealing performance against eccentric movements. |
# Basic cylinders # Cylinders for construction machine tools and industrial vehicles # Cylinders for machine tools and industrial vehicles |
| RNY-Packings [Rod packings] |  |
RN922 | ||
| (T)SGY-Packings [Piston packings] |  |
RN812 | The groove dimensions of SGY & SNY packings are compatible with those of the SKY-packings. Service temperature range of －45℃ to +100℃ allows cylinders for use in multiple temperature conditons -in both regular and severe cold euvironments- without changing packings. SGY & SNY-packings also feature exceptionally low stick slip. Due to the nature of the application, the material is required to have a moderately low material hardness. Conduct verification tests in the case of SGY & SNY-packings are used in high pressure and/or high frequency conditions. |
# Crane and aerial work platforms # Cylinders for rigid conditions |
| (T)SNY-Packings [Rod packings] |
 |
RN809 | ||
| SKY-Packings [Piston & rod packings] |  |
RN906 (RF905) (RF907) |
SKY-packings are specified as the basic hydraulic packing in Japan since 1966. SKY-packings are multiply applicable to both pistons and rods. Flexible and easy installing properties fit to one piece groove and eliminate parts of divided grooves. Compacter cylinder design with lower cost is achievable by SKY packings. |
# Basic cylinders # Cylinders of low hydraulic pressure # Cylinders for construction machine tools and industrial vehicles |
| KY-Packings [Piston & rod packings] |  |
RN906 (RF905) (RF907) |
KY-packings replace V-packings with superior sealing performance, compacter groove dimensions and easy installation. The largest cross-sectional area of KY- packings assures stable sealing performance for vast applications. Abundant dimensional assortment is another plus. | # Basic cylinders # Hydraulic press and injection molding machine # Cylinders for construction machine tools and industrial vehicles |
| RGU-Packings [Piston packings] |  |
RN923 | As double acting packings, the RGU-packings have a unique seal lip shape and provide identical sealing performance to U-packings on compacter sized pistons. Frequently be in service as a combination system with the PWL-bearings which offer multi-functions-bearing & back-up ring. | # Cylinders for agricultural machines # Cylinders for machine tools and industrial vehicles # Cylinders for light weight construction machines |
| HSD-Packings [Piston packings] |  |
RN906 | HSD-packings are double acting packings and enable to minimize the size of pistons. Stable sealing performance without damage from twisting or rolling, unlike O-rings, is obtainable. |
# Cylinders for agricultural machines # Cylinders for industrial vehicles |
| PENTA-Seals PS [Rod packings] |
 |
RN906 (RF905) |
The grooves of PENTA -Seals are compatible with those of O-rings specified by JIS B2401 P line. In addition to the superior sealing performance, PENTA -Seals prevent damage from twisting or rolling. |
# Miniature cylinders # Control valves, solenoid valves |
| NMY-Packings [Rod packings] |  |
RN906 | NMY-packings are small in cross sectional area and compatible with the grooves of O-rings specified by JIS B2401 P line. NMY packings are far superior in sealing performance and friction characteristics over O-rings. | # Miniature cylinders # Control valves, solenoid valves |
| STK-Seals (STR type) [rotation seals] |
 |
PT151 | S-FLON (PTFE) seals and back-up rings are combined to achieve low friction characteristic and of elimination stick slip even at low pressure/speed conditions. Moderate sealing performance comparing with U-packings due to the PTFE plastic seals which have higher rigidity and lower elasticity than rubber materials. Good practice is needed to prevent scars on the delicate surface of S-FLON seals. # ST type is applicable to common & general applications with diversified dimensions. |
# Rotary joints # Swivel joints |
| ST-Seals [Piston seals] |  |
PT111 | # Cylinders for machine tools and industrial vehicles | |
| SMJ-Seals [Rod seals] |  |
PT154 | # Cylinders for general industrial machines # Cylinders for construction equipment # Cylinders for special applications |
