Safety burst discs are designed to rupture if the jetter pressure rises to unsafe levels. This could occur when a jetting nozzle becomes blocked or hoses are damaged. After rupture the disc harmlessly allows the pump pressure to release, protecting the operator and equipment.

Burst discs, sometimes called pressure discs or rupture discs are single use only and must be replaced after the cause of failure has been rectified.

A stock should always be kept with the jetter and only genuine replacement parts should be used in the pressure disc holder. The safety burst disc adaptor and holder should be checked regularly for signs of wear. A worn adaptor or holder could lead to premature burst disc failure.

burst disc holder
Burst Disc Holder

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Yellow = 1,800 psi (130 bar)

Blue = 2,000 psi (140 bar)

Red =  2,500 psi (170 bar)

Purple = 3,000 psi (200 bar)

Green = 3,500 psi (240 bar)

White = 4,000 psi (280 bar)

Black = 5,000 psi (350 bar)

Orange = 6,000 psi (415 bar)

(All values are approximate)