Flameproof enclosure by a lever on the brass sleeve requires co-ordinated with copper sleeve

Button ring groove on the rod-proof products, many manufacturers now shell and front cover has a variety of button, the button bar is often used form of ring, ring effect is that once the explosion occurred inside the enclosure, the pressure acting on the button bar ends, the ring can be introduced to prevent the button rod outer shell, thus avoiding the formation of the button bar missing booster channels. It  electric meter , taken from a mechanical manual investigation groove depth is small, if roots unclear bottom pressure in the circular ring will follow the axial sliding movement relative to the button bar, the loss of a ring effect.  power transformers , the design of the groove depth should be appropriate bigger, processing bottom should pay attention to clean the root, or simply use the pin structure is more reliable. About flameproof enclosure by a lever on the brass  Voltage stabilizer  co-ordinated with copper sleeve, copper sleeve is an interference fit with the housing, and the joystick is clearance fit. Copper sets the amount of interference should not be too large, should be controlled not more than 0.05mm, copper sleeve wall thickness should not be less than 2.5mm.