Pushers belong to the crown which is probably the most susceptible part of the best dive watches as far as water resistance is concerned. Usual understanding determines that you do not press or move the pushers and crown when the watch is wet or is underwater.
Part of the pusher includes “O” rings which are primarily made from rubber, Teflon or nylon. For apparent reasons, the very best type of pushers or crowns are screwed down pushers because it develops a much better seal due to the threading of the screw.
Some diving watches like the Casio and the orange monster dive watch by Seiko have a push pieces that are specifically developed which enables them to be operated even undersea. These sort of pushers keep the water from entering the crown with using gaskets and “O” rings.
Why dive watches are labeled water resistant rather of waterproof?
The easy factor for this is there is technically no such thing as waterproof. Dive watch are water resistant to a particular point however eventually, if the watch was not utilized or preserved effectively, the aspects that enable them to keep water out will certainly fail.
Pushers and crowns is not much help if they were not pushed or screwed down totally prior to being immersed. The “O” rings and gaskets, which are mostly made of material that respond to heat, can lose stability and eventually their ability to keep moisture from the watch’s mechanisms.
Examples of this is if you wear your dive watch in locations of extreme heat like a jacuzzi or a sauna. The combination of moisture / humidity and heat can trigger the rubber or nylon sealant to get misshapen and even reduce.
Why is it needed to enhance pushers?
Because it is the weakest point of a dive watch’s ability to resist wetness, pushers or crowns needs to have a lot of assistance in keeping water out. The mechanism of these pushers is surprisingly easy but reliable but much like your automobile, it needs some preventive upkeep.
It is recommended that you have the water resistance of your dive watch checked each year to make certain that everything is in perfect working condition. This also enables you to replace any gasket or “O” ring that may have lost or misshapen.
How is dive watch water resistance tested?
There are 2 means to check a dive watch’s ability to keep water out of and theoretically how well the pushers or crown is doing its job. There is what is called dry testing where the watch is tested utilizing atmospheric pressure then determined to examine if the case will broaden as a result of the air entering the watch’s case. Certainly, if it does, then the watch fails the test.
The other test is the wet test where the watch is submerged in water, if bubbles come out of the watch, that means water can seep into the watch system and therefore is not water resistant. Another form of this test is when the watch is put in a water chamber and subjected to a level of pressure offered by a piston.