The brake actuation kit has proved to be very popular and can be assembled in a very short time. It benefits from an internal non-return valve, a moulded diaphragm specifically designed with corrugations, which allow movement without excessive loss of power. Each component is either moulded in a specific polymer, made of stainless steel (in the case of the piston rod), mild steel plated or painted (in the case of the anchor stud, trunnion ring,nuts and screws). Both ‘O’ rings are selected for their suitability, one in the non-return valve and one in the gland seal, which runs in a polished bore. There is no machining required and the kit is available in two versions: one with a stud extending from the rear cover and the other with a steel trunnion ring with two bearings mounted around its mid point. The actuator has proved to be powerful and reliable when working at the vacuum levels employed on most miniature railways.

The actuation cylinders have been designed to fit most models, if space permits. If space is an issue then PNR-2D – Vacuum Actuation Kit with Trunnion Mounting would be more suitable.