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2187.4888 ms / 296.8769 ms / 1890.6119 ms /
Piston seals
PN 02 9274.1
Material: PU 80
Application: hydraulic seal
Operating pressure: ≤ 160 bar
Radial clearance: ≤ 0.2 mm
Operating temperature: -30 °C to +80 °C
Feed rate: ≤ 0.5 m/s
Design: Single-acting piston
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Piston sealing collar for hydraulics. Asymmetrical shape with pre-set inner
cutting edge optimizes a tight fit in the piston groove and ensures the durability of the cuff
even under harsh conditions. The PU material guarantees a long service life.
Shape identical to type: MA 23 (NBR 160 bar) PN 02 9274.2 (PU 320 bar)
MA 28 (PU 400 bar)
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PN 02 9274.2
Material: PU 90
Application: hydraulic seal
Operating pressure: ≤ 320 bar
Radial clearance: ≤ 0.2 mm
Operating temperature: -30 °C to +80 °C
Feed rate: ≤ 0.5 m/s
Design: Single-acting piston
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Piston sealing collar for hydraulics. Asymmetrical shape with pre-set inner
cutting edge optimizes a tight fit in the piston groove and ensures the durability of the cuff
even under harsh conditions. The PU material guarantees a long service life.
Shape identical to type: MA 23 (NBR 160 bar) PN 02 9274.1 (PU 160 bar)
MA 2
Alternative designations: K606, DK101PU Seal Jet
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MA 23
Material: NBR 90
Application: hydraulic seal
Operating pressure: ≤ 160 bar ≤ 80 bar ≤ 50 bar
Radial clearance: ≤ 0.1 mm 0.15 mm 0.2 mm
Operating temperature: -30 °C to +100 °C
Feed rate: ≤ 0.5 m/s
Design: Single-acting piston
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Piston sealing collar for hydraulics. Asymmetrical shape with pre-set
internal cutting edge optimizes a tight fit in the piston groove.
The NBR material has excellent
sealing properties.
Shape identical to type: PN 02 9274.1 (PU 160 bar)
MA 28 (PU 400 bar)
PN 02 9274.2 (PU 320 bar)
Alternative designations: KNA23, DK101NBR Seal Jet
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MA 28
Material: PU 95
Application: hydraulic seal
Operating pressure: ≤ 400 ≤ 200 ≤ 100 ≤ 50 bar
Radial clearance: ≤ 0.25 0.35 0.5 0.6 mm
Operating temperature: -40 °C to +100 °C
Feed rate: ≤ 0.5 m/s
Design: Single-acting piston
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Piston sealing collar for hydraulics. Asymmetrical shape with pre-set
internal cutting edge optimizes a tight fit in the piston groove
and ensures the durability of the sleeve
even under harsh conditions. The PU material guarantees a long service life.
PN 02 9274.1 (PU 160 bar) MA 23 (NBR 160 bar)
PN 02 9274.2 (PU 320 bar)
Alternative designations: KNA28, K606, DK101PU Seal Jet
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Material properties
PU
PU seals are primarily designed for use in hydraulic applications. PU material has
higher durability compared to NBR material and is able to seal higher pressures.
However, due to the NBR material it has a lower quality of abrasion. Polyurethane provides
cuffs a long service life and the ability to withstand harsh environments.
Operating temperature -40 °C to +100 °C.
PU seals are suitable for hydraulic oils according to DIN 51524 (1-3 and lubricating
mineral oils. For HFA and HFB pressure fluids the operating temperature is limited
to +60 °C, for HFC to +40 °C.
NBR
Seals made of nitrile butadiene are suitable for hydraulic and pneumatic systems
with lower operating pressures. Compared to PU, NBR is not suitable for
high pressure seals, but has a higher quality of abrasion and better adhesion with minimal
creep. NBR can also be successfully used in pneumatic applications.
Operating temperature -30 °C to +100 °C.
NBR seals are suitable for hydraulic oils according to DIN 51524 (1-3) and lubricating oils
mineral oils. For HFA and HFB pressure fluids, the operating temperature is limited to
+60 °C, for HFC to +40 °C.