Abstract: A sectional door track with improved access to rollers, and methods for using the device are disclosed herein. The sectional door track can be configured to house sectional door rollers operably connected to a sectional door. The door track includes a horizontal segment, a vertical segment, and a curved segment interspersed between horizontal and vertical segments. The door track also includes at least one access door operably connected to one or more of the horizontal and vertical segments of the track. In some embodiments, the access door can be operably connected to one or more of the horizontal and vertical segments of the track by a hinge. In some embodiments, the door track can optionally include a locking ring operably attached to the door track and a locking ring operably attached to the access door. A locking pin configured to slide through the door track locking ring and the access door locking ring to secure the access door in a closed position can also be included.

Abstract: A refrigerant reversing valve assembly comprising a refrigerant reversing valve including a fluid pressure actuable reversing valving member for reversing the direction of refrigerant flow in a refrigeration system, a pilot valve unit for controlling actuation of the valving member comprising a pilot valve housing in fluid communication with the reversing valving member, an actuable pilot valving member in the housing, and pilot valve actuating means comprising a pilot valving actuating member plunger coupled to the pilot valving member, a guide tube surrounding the plunger connected to the pilot valve body and projecting therefrom, and a solenoid surrounding the guide tube for actuating the plunger, and supporting structure for interconnecting the reversing valve and the pilot valve unit.

Abstract: A refrigeration system including a refrigerant flow reversing valve. The flow reversing valve includes a valve housing providing a chamber communicating with a refrigerant compressor discharge via a first port and a bearing surface with second, third and fourth ports opening into it, the second port communicating with the compressor inlet. A valving member is disposed on the surface for sliding movement to communicate, respectively, the first and fourth and second and third ports when in one position and to communicate, respectively, the first and third and second and fourth ports in a second position. The valving member is formed by a rigid plastic body defining a cavity by which the second port is communicated with the respective third and fourth ports and a face surrounding the cavity extending generally parallel to the bearing surface.