O-rings and Backup rings
O-rings are one of the most common sealing solutions. SKF supplies O-rings in a wide range of sizes and different materials, which make them appropriate for a wide variety of operating conditions and applications. They are easy to install and they enable a simple and cost-effective seal housing design.
Designation
The designations of SKF O-rings in both metric and inch sizes contain their dimensions in metric units. The designations of SKF back-up rings in metric sizes contain their dimensions in metric units, whereas those in inch sizes contain their dash-number. The size lists for both are provided in inch and metric sizes. If applicable the unique dash-numbers for O-ring sizes in accordance with standards AS586:2012 and ISO 3601:2012 are also listed here.
Know more
Materials
The O-rings listed in this section are made of nitrile rubber (NBR) with 70 shA hardness as standard. This is the most common O-ring material and hardness used in hydraulic cylinder applications. On request, SKF can supply alternative hardnesses such as 80 shA or 90 shA. However, SKF generally recommends choosing O-rings with 70 shA and combining them with one or two back-up rings. At operating temperatures above 100 °C (210 °F), fluorocarbon rubber (FKM) or hydrogenated nitrile rubber (HNBR) can be an appropriate materials, depending on the fluid.
Know more
Standards and sizes
The O-rings listed in this section are made of nitrile rubber (NBR) with 70 shA hardness as standard. This is the most common O-ring material and hardness used in hydraulic cylinder applications. On request, SKF can supply alternative hardnesses such as 80 shA or 90 shA. However, SKF generally recommends choosing O-rings with 70 shA and combining them with one or two back-up rings. At operating temperatures above 100 °C (210 °F), fluorocarbon rubber (FKM) or hydrogenated nitrile rubber (HNBR) can be an appropriate materials, depending on the fluid.
Housing dimension & Dimension
O-rings for static (non-moving) sealing can be used in a wide variety of applications and arrangements. The most common arrangement in hydraulic cylinder applications is static radial sealing between coaxial cylindrical parts. The O-ring is installed in a housing that is machined either as an outside groove or an inside groove in one of the two cylindrical parts. The housing dimensions for static radial sealing O-rings are listed in the size lists.
Know more
HYTEC INTERNATIONAL L.L.C.
P.O.Box. 3107
Ras al khor industrial area 2,
Dubai, U.A.E.
T: +971 4 333 1399
F: +971 4 333 1405
E: sales@hytec.ae
HYTEC ABU DHABI L.L.C.
P.O.Box. 8616
Musaffah M 39,
Abu Dhabi, U.A.E.
T: +971 2 551 5657
F: +971 2 551 5658
E: abudhabi@hytec.ae
HYTEC OMAN L.L.C.
P.O.Box. 958
Postal code 133,
Muscut, Oman
T: +968 2 459 5365
F: +968 2 459 5362
E: hytecomn@omantel.net.om
HYTEC SALALAH
P.O.Box. 480
Postal code 221,
Salalah, Oman
T: +968 2 321 2585
F: +968 2 321 2686
E: hytecsll@omantel.net.om
HYTEC SOHAR
P.O.Box. 958 PC: 133
Ouhi Industrial area,
Sohar, Oman
T: +968 2 206 3626
F: +968 2 206 3629
E: sohar@hytec.om