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When my metal bellows seal fails because of breakage at the plates, the break is always near the end fittings and never in the middle of the bellows. How is that explained?

April 26, 2017bellows break breakage fails fittings metal near plates seal

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When my metal bellows seal fails because of breakage at the plates, the break is always near the end fittings and never in the middle of the bellows. How is that explained?

1 Answer

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To much torque load at the plates, or bellows diaphram, and the plates can not stand for. It might caused by too closed working length set up, high viscosity fluid or shock load when starting equipment.