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发表于 2015-4-15 01:30:12
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管路防爆阀,欧洲要求挖掘机大臂管子破裂时,下降的速度要在安全范围内。
ISO 8643:1988
Excavators, with lifting devices for >1000 kg of load, needs a safety system on the boom cylinders.
The load speed (< 200 mm/s) may double itself with hose burst maximally.
The drop rate of the load shall not exceed 10 mm/s.
The operation of the device shall not detract from the normal response and stability.
The valve has to be fitted directly on the cylinder – without hose
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