Hydraulic Seals

Specifications of Major Hydraulic-use Packings


SAKAGAMI Hydraulic Seals Application Guide
(Click on individual "Profile" for more info and available sizes)

HYDRAULIC SEALS
Product name Cross Section Standard Material Specification Remarks
Service position Material No. Service Range
Max. pressure
( kgf/cm² )
Speed
( m/s )
Temp
( c° )
GPY - Packings RN919 GPY-Packings 175 1 -30 ~ 100

Features:
Packings exclusively for pistons and rods, respectively, using wear proof material. Section sizes for diameter sizes are made larger than those of SKY-Packings. Durability has been improved. GPY-Packings for pistons are hard to cause damage brought about by back pressure, while GNY-Packings for rods have been improved in sealing performance for good elastic seal materials.

Main Usage:
1) Standard cylinders
2) Cylinders for industrial vehicles
3) Cylinders for rods

exclusively for pistons with Back-up Rings 250 0.5
with Secondary Back-up Rings 350
GNY - Packings RN919 GNY-Packings 175 1 -30 ~ 100
exclusively for rods with Back-up Rings 250 0.5
with Secondary Back-up Rings 350
RGY - Packings
exclusively for pistons
RN923

Features:
It is compatible with SKY-packing as a dedicated packing for load and piston. RGY-packing for piston is designed to prevent damage due to back pressure using wear-resistant materials. RNY-packing for load has higher seal nature and concentric feature with design dedicated for load as it adopts high elastic rubber.

Main Usage:
1) Standard cylinders
2) Cylinders for machining tool
3) Cylinders for industrial vehicles

RNY - Packings
exclusively for rods
RN922
SGY Packing
exclusively for pistons
RN812 with Back-up Rings 210 0.5 -45 ~ 100

Features:
Packings exclusively for pistons and rods compatible in grooves with SKY-Packings. Available for use at -40 to 100 degree C. Unnecessary to replace packings in the specifications of domestic and overseas cold districts. Compared with other U-packings, designed hard to cause stick slip. Laying stress on cold proof, rubber hardness is restrained. Be careful in use under the conditions of high pressure and high frequency.

Main Usage:
1) Cylinders in the specification of cold resistance

SNY - Packings
exclusively for rods
RN809 with Back-up Rings 210 0.5 -45 ~ 100
SKY - Packings RN906 SKY-Packings 140 1 -10 ~ 80

Features:
Most popular packing for hydraulic cylinders. Available for use for both pistons and rods. Available for mounting this packing in a solid groove. Possible to reduce the number of part items and conduct compact design. Effective in reducing cost.

Main Usage:
1) Standard cylinders
2) Cylinders for low hydraulic pressure
3) Cylinders for machining tool
4) Cylinders for industrial vehicles

for rods and pistons with Back-up Rings 210 0.5
KY - Packings RN906 KY-Packings 150 1 -10 ~ 80

Features:
Abundant size varieties and excellent durability owing to large cross section. Highly stable performance over wide range of applications and service conditions.

Main Usage:
1) Standard cylinders
2) Press die cushion

for rods and pistons with Back-up Rings 300 0.5
RGU - Packings RN923 RGU-Packings 140 1 -25~ 100

Features:
Special one ring shaped packing for both sides pressure with seal lip. Has the same sealing performance as U-packing. Possible to make a piston compact. PWL-Bearings for bearings combined with back-up rings are being prepared.

Main Usage:
1) Cylinders for agriculture machines
2) Cylinders for machining tool
3) Cylinders for industrial vehicles
4) Cylinders for small construction machines

exclusively for pistons with Back-up Rings 210 0.5
with PWL-Bearings 210
PENTA - Seals
RN906
(RF905)
PENTA-Seals 140 0.5 -10 ~ 80

Features:
PENTA - Seals are interchangeable with O-rings of JIS B-2401 P-series. Offer superior sealing effects compared with O-rings and remain free from distortion and extrusion.

Main Usage:
1) Small diameter cylinders
2) Operating valves, solenoid valves

exclusively for rods with Back-up Rings 210 0.5
HSD - Packings
RN906 HSD-Packings 140 1 -10 ~ 80

Features:
Packings of both sides pressure type. Available for thin type design for pistons. Compared with O-rings, stable sealing performance is conducted without distortion and damage caused by rolling.

Main Usage:
1) Cylinders for agriculture machines

exclusively for pistons with Back-up Rings 210 0.5
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