APCO AIR RELEASE VALVES
31.01.2012., utorak
SIDE ENTRY TRUNNION MOUNTED BALL VALVES - MOUNTED BALL
Side entry trunnion mounted ball valves - Air cannon sprinkler valve. Side Entry Trunnion Mounted Ball Valves
West Seattle Railroad Bridge 5 This is the West Seattle railroad bridge on the west side of the Duwamish River. It's a patented Strauss "heel-trunnion" bascule bridge. It's in the down position with a train traveling left to right heading into West Seattle. According to historylink.org: How It Works The typical bascule bridge works like a seesaw with a moveable leaf and a counterweight attached to its "heel," a pivot much like the pivot at the center of a seesaw. When the bridge opens, the counterweight dips into a counterweight pit. This seesaw-like arrangement enables a bridge to open and close with a minimum of power provided by a motor. The West Seattle Railroad Bridge is a Strauss "heel-trunnion" bascule bridge and this differs in that the moveable leaf and counterweight each rotate around separate heels (called "trunnions"). Thus the counterweight rises and falls in a tower and doesn't require a counterweight pit. The energy is transferred from the leaf to the counterweight through a system of gears arranged in a parallelogram. The dead load of the bridge (the weight of the bridge itself) can thus be divided between two different piers, which allows the piers to be less substantial and more economical. West Seattle Railroad Bridge 3 A view south looking upstream on the Duwamish River. Mount Rainier is framed by the West Seattle railroad bridge on the west side of the river. It's a patented Strauss "heel-trunnion" bascule bridge. According to historylink.org: How It Works The typical bascule bridge works like a seesaw with a moveable leaf and a counterweight attached to its "heel," a pivot much like the pivot at the center of a seesaw. When the bridge opens, the counterweight dips into a counterweight pit. This seesaw-like arrangement enables a bridge to open and close with a minimum of power provided by a motor. The West Seattle Railroad Bridge is a Strauss "heel-trunnion" bascule bridge and this differs in that the moveable leaf and counterweight each rotate around separate heels (called "trunnions"). Thus the counterweight rises and falls in a tower and doesn't require a counterweight pit. The energy is transferred from the leaf to the counterweight through a system of gears arranged in a parallelogram. The dead load of the bridge (the weight of the bridge itself) can thus be divided between two different piers, which allows the piers to be less substantial and more economical. Similar posts: 15mm pressure reducing valve flush valve seat repair what is a pinch valve gate valve design hayward butterfly valve brake servo valve clow butterfly valves isa valve sizing ga industries check valve |