Technical Specifications: Caterpillar 8N-8509 Crankcase Explosion Relief ValveThe Caterpillar 8N-8509 Crankcase Explosion Relief Valve is a critical engine safety device. It is engineered to provide rapid, reliable pressure relief to protect large internal combustion engines from catastrophic structural damage caused by potential pressure buildup or internal explosions within the crankcase.
1. Core Dimensions & Weight
- Length: 330.20 mm (13.00 in)
- Width: 330.20 mm (13.00 in)
- Height: 203.20 mm (8.00 in)
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Net Weight: 3.58 kg (7.89 lbs)
2. Functional & Safety Specs
- Application Purpose: Mitigates overpressure events within the oil pan / crankcase area.
- Operation: Automatically vents extreme pressure spikes outward and immediately reseals to prevent external oxygen from entering, minimizing the risk of secondary crankcase explosions.
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Durability: Built to withstand heavy vibration, high thermal cycles, and constant exposure to oil mist and engine gases.
3. Equipment & Engine Compatibility
This safety relief valve is predominantly used on large-bore Caterpillar 3500 and G3500 series industrial, marine, and power-generation platforms:
- Diesel Engine Series: CAT 3508, 3512, 3516 (including B, C, and high-displacement sub-variants).
- Gas Engine Series: G3508, G3512, G3512E, G3516, G3516B, G3516C, G3516E, G3520B, G3520C, G3520E.
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System Group: Typically integrated into the basic engine block structure or as a dedicated valve group attachment (matching the 8N-8510 Valve Group assembly).
4. Part Cross-References
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Alternative Part Numbers: 8N8509, 8N 8509
