Rod-Piston seal K21 18x28x6 NBR

Rod–piston seal K21, dimensions 18×28×6 mm, made of nitrile rubber (NBR).
The K21 profile is a double-acting seal that can be installed either on the piston or on the rod.
Its symmetrical design ensures sealing performance in both directions, while the flexible lip maintains tightness under reciprocating motion.

Design features:

• rod–piston double-acting seal,

• symmetrical profile for piston or rod installation,

• designed for reciprocating motion,

• stable sealing in both directions.

Technical details (catalogue values):

• Inside diameter d: 18 mm (≈ 0.71 inch)

• Outside diameter D: 28 mm (≈ 1.10 inch)

• Height H: 6 mm (≈ 0.24 inch)

• Material: NBR (nitrile rubber)

• Operating temperature: –30°C to +105°C

• Max. pressure: up to 150 bar

• Max. speed: up to 0.5 m/s