Application Ralston’s PB89 pushbutton enclosures are designed to provide protection against dust, dirt, and oil for most standard oil tight pushbuttons, switches, and pilot lights. PB89 are applied where the installation requires extra depth and an inner back panel.
Construction All PB89 pushbutton enclosures are made from 14 ga. cold rolled steel. All seams are continuously welded and each enclosure comes complete with a removable 14 ga. back panel mounted on four 10-32 weld nuts. Grounding studs are provided on the inside of the box and door and wall mounting back brackets are welded to the top and bottom outside.
The PB89 prepunched door is secured to the enclosure by a continuous piano hinge on one side and 10-32 captive screw and sealed (blind) rivnuts on the opposite side. The door is sealed with a one piece oil resistant neoprene gasket.