Sony MPK-DVF7 User Manual
22
-GB
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 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.
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
water
pressure
O-ring
The rubber surface of the O-ring seals the opposite surface to
prevent water from entering the gap.
prevent water from entering the gap.