Cummins Engine Parts Rocker Arm Chamber Cover Gasket Set 3171499

With a gradient composite design: the outer layer is a fluorine rubber (FKM) oil - resistant layer (with a temperature resistance range from - 30°C to 200°C). The middle layer is coated with expanded graphite (with a pressure resistance of 3MPa) and is embedded with a 304 stainless - steel waveform spring sheet, which can compensate for thermal deformation of up to 0.25mm and increases the service life of traditional asbestos gaskets by four times.

The surface is coated with a polytetrafluoroethylene (PTFE) microporous coating (with a thickness of 50μm) and has a friction coefficient ≤ 0.1, enabling it to adapt to the high - frequency vibration of the rocker arm chamber cover (with a frequency of 200Hz and an amplitude of ± 0.5mm).

The built - in labyrinth oil guide groove design balances the pressure difference between the inside and outside of the crankcase (±0.5kPa), reducing the load on the oil - air separator and decreasing oil consumption by 15%.

It has passed the ASTM B117 salt spray test for 3000 hours without showing corrosion, making it suitable for extreme environments such as offshore platforms and desert mining areas where the Cl - ion concentration is >500mg/L.

• Mining machinery: When adapted to the Caterpillar 789D mining truck's QSK60 engine under working conditions with a dust concentration of 300mg/m³, the sealing life reaches 12,000 hours, reducing the average annual downtime for cleaning by six times.

• Generator sets: For QSK38 - G3 diesel generator sets, oil and gas leakage is <0.1g/kWh (in line with ISO 8178 standard), reducing the fire risk level of the engine room to Class II.

• Marine power: Matched with the QSK60 - M marine main engine, it is certified by DNV - GL, resistant to salt spray erosion under Class 6 sea conditions, and the maintenance cycle is extended to 18 months.

• Economic revolution: By extending the replacement cycle (2 years/12,000 hours), the average annual maintenance cost per unit is reduced by approximately 28,000 yuan (calculated based on 6,000 hours/year).

• Intelligent diagnostic compatibility: An optional pressure - sensitive colour - changing indicator strip (with a response pressure range from 0.1 - 3MPa) is available, enabling real - time monitoring of the pressure distribution on the sealing surface through the Cummins Insite system's image recognition. The warning code SPN 3719 - 17 (seal failure) has an accuracy rate of ≥ 99%.