Sony MPK-DVF7 User Manual download pdf (Page 22)

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What is an O-ring?

• An O-ring is part of the water-proof packing that is used on underwater cameras, watches, and

other diving equipment.

• The O-ring acts to preserve the waterproof qualities of the marine pack and other equipments.

How the O-ring waterproofs

When water pressure acts on the O-ring, the contact surface area of the

O-ring expands to increase the force acting on the groove on the marine pack.

O-ring maintenance is very important. If O-ring maintenance is not

followed according to instructions, a water leak may occur and

cause the marine pack to sink. Waterproofing is achieved by

perfect sealing of the O-ring to the entire contact surface.

Note on the O-ring

O-ring

water

pressure

O-ring

The rubber surface of the O-ring seals the opposite surface to

prevent water from entering the gap.

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Sony MPK-DVF7 User Manual Page 22