Four Post Ramp Lifts design allows complete under-vehicle access for all types of repair without side obstructions like scissors and parallelogram lifts & also indoor and outdoor installation are quick and easy. It allows full service to all types of cars, vans, trucks and buses, without having to adjust the tracks.
Four post runway lifts is designed from anti-spread bolts and rods. It is used in military vehicles and heavy trucks. It is a free-standing portable or semi-portable four-post runway style. This lift consists of channel and boxed frames. Channel frames are lighter and less expensive. Boxed frames will be resistant to flexing under load and will add stability to the lift.
Four way ball valve is a spherical type of valve. It is operable to as many as four positions. It can be installed on a railway car in place of the branch pipe tee to eliminate the need for an angle cock at each end of the brake pipe and a brake control valve cut-out cock. The ball valve is functionally analogous to a rotary valve in cutting off the brake pipe at either end of the car without interrupting the brake control valve connection with the brake pipe, or in cutting out the brake control valve while establishing brake pipe continuity through the train.