. Air brake text for engineers and firemen; . PLATE 59. tt j> 142 DOUBLE PRESSURE CONTROL OR SCHEDULE U. port / in the brake valve. The low pressure head is thereforesubjected to main reservoir pressure when the brake valve isin running or release position, which allows the air pressure topass to the low pressure head, causing the pump to stop when themain reservoir pressure is equal to the adjustment of this the brake valve is placed in lap, service or emergency posi-tion, the main reservoir pressure is cut off from the feed valveand also from the low pressure governor head, and
. Air brake text for engineers and firemen; . PLATE 59. tt j> 142 DOUBLE PRESSURE CONTROL OR SCHEDULE U. port / in the brake valve. The low pressure head is thereforesubjected to main reservoir pressure when the brake valve isin running or release position, which allows the air pressure topass to the low pressure head, causing the pump to stop when themain reservoir pressure is equal to the adjustment of this the brake valve is placed in lap, service or emergency posi-tion, the main reservoir pressure is cut off from the feed valveand also from the low pressure governor head, and permits thepump to operate until the pressure in the main reservoir is equalto the adjustment of the high pressure head, which will then stopthe pump. While the brake valve is in running or release position port /is closed, but air pressure reaches the low pressure governor headby passing back from the brake pipe through the feed valve at-tachment. DOUBLE PRESSURE CONTROL OR SCHEDULE The double pressure control equipment is shown on Plate 60
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Keywords: ., bo, bookcentury1900, bookdecade1900, bookidairbraketextfore00nati
