MIDTERM UTILITES 2 (2) Flashcards
consists of a wedge–shaped plug and used when a normal fully open or closed position is desired
GATE VALVE
operated by screwing down a disk with soft packing until it presses tightly upon a metal seat.
GLOBE VALVE
used when it is desired that the flow through a pipe be always in one direction
CHECK VALVE
has a pivoted flap which is readily pushed open by the pressure of water but is tightly closed by the force of a reverse flow.
SWING CHECK VALVE
consist of a loose disk which closes by gravity when the pressures on both sides are equal
HORIZONTAL OR LIFT CHECK VALVE
changes the direction of the flow of water
ANGLE VALVE
the public water system laid underground along the streets where house service is connected.
WATER MAIN
used either for the collection of water or for storing water. Materials used on tanks are Stainless steel, Galvanized Iron (G.I.), Reinforced Concrete, and Polyvinyl Chloride (PVC).
TANKS
THREE WAYS OF WATER DISTRIBUTION
UPFEED SYSTEM - from normal water pressure from public water main for low rise buildings
PNEUMATIC TANK - from air pressure from suction tank for tall buildings
DOWNFEED SYSTEM - by gravity from overhead tanks and are supported either by structural frames or on the roof decks
the equipment required for the joining of the various lengths of pipe
PIPE FITTINGS
it should be strong to resist the high pressure of boiling water stored in it
HOT WATER TANK
small hot water tank. made of galvanized sheet, steel or copper. size from 0.30 to 0.60 meter in diameter with a length of not more than 1.80 meters.
RANGE BOILER
large hot water tank. made of heavy duty metal sheets with rust proof paint. size also varies 0.60 to 1.30 meters diameter and its length is up to 5.00 meters long.
STORAGE TANK
