pipes and valves

25問 • 2年前

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Start or shut down a system Regulate pressure Check backflow Control the direction of water

Valves

Used mainly to completely close or completely open the water line (does not control flow of water) Best suited to the main supply and pump lines wherein operation is infrequent

Gate Valve

2 types of gate Valves

The Wedge Shape or Tapered Disc The Double Disc Valve

Operates in the same manner as globe valve (disc & seat design) Used to make a 90° turn in a line Reduces number of joints

Angle Valve

Located at the lower end of the pumps Used mainly to prevent loss of priming of the pumps a.k.a. 'Retention Valve'Located at the lower end of the pumps Used mainly to prevent loss of priming of the pumps a.k.a. 'Retention Valve'

Foot Valve

Used on water systems, heating systems, compressed air lines & other pipe lines with excessive pressure

Safety Valve

Made of an alloy of cast iron and silicon Installed in chemical laboratories, industries and other installations where acid wastes are being discharged Brittle and cracks easily, thus horizontal runs have to be Supported at every 1.50 meter interval to prevent sagging

Acid Resistant Cast Iron Pipe

Made of an asbestos fibers and portland cement Used as soil, waste, ventilation pipe & downspouts Suited for concrete embedment because of similar properties

Abestos Pipe

Cheapest of all types of pipes Light in weight, slightly flexible and can take slight soil movement without danger of cracking or pulling out of its joints. It is thus suited for house sewer and septic tank installations may be softened/damaged by excessive hot water or chemical flow

Bituminous Fiber Sewer Pipe

One of the oldest materials used for sewer lines • Highly resistant to most acids Because it is made of clay, it is brittle and cracks easily when laid on unstable ground Made in short lengths of 750mm

Vitrified Clay Pipe

Controls the flow of water with a movable spindle Can reduce water pressure (throttling) Only one side of the valve is an inletControls the flow of water with a movable spindle Can reduce water pressure (throttling) Only one side of the valve is an inlet

Globe Valve

3 types of globe valve

The Plug Type Disc Valve -for throttling The Conventional Disc Valve (Ball Type) -for shutting The Composition Disc Valve -for steam and hot water

Main function is to prevent reversal of flow (backflow) in the line

Check Valve

4 types of Check Valves

• The Swing Check Valve • The Lift Check Valve • Vertical Check Valve • Horizontal Check Valve

Most popular and generally specified material for drainage installation. Extensively used in the 60s and 70s. Durable, conveniently installed (<25 storey) • Commercial length: 600 cm • Diameters: 50-150mm • Affected to some extent by corrosion by acid formed by Carbon Dioxide, Sulphur Oxide, and Methane Gases that create rust

Cast Iron Soil Pipe

2 types of cast iron soil pipe

SV,XV

4 varieties of cast iron soil pipe

standard,single hub pipe,double hub pipe,hubless pipe

Developed in Germany in 1935 Most are produced from synthetic resins Superior type of pipe because it weighs less, is easy to cut, is flexible, has a smooth interior surface, and is cheaper than steel

Plastic Or Synthetic Pipe

2 types of plastic or synthetic pipes

Rigid type (pipes) Polyvinyl Chloride (PVC) Chlorinated Polyvinyl Chloride (CPVC) Unplasticized Polyviny! Chloride (UPVC) Acrylonitrile Butadiene Styrene (ABS) Polypropylene (PP) Styrene Rubber Plastic (SR) Flexible type (tubing) The Polyethylene (PE)- coil form; 30 m long The Polybutylene (PB)- coil form; 30 m - 150 m long

The oldest pipe used for plumbing systems Highly resistant to acid Poisonous and injurious, is therefore not recommended to convey water for human consumption

Lead Pipe

Made out of mild steel and expected to last 15 to 25 years Subject to deposits of salt and lime which can cause FHL Comes in several commercial sizes: 10 (3/8"*), 13 (1/2"), 20 (3/4"*) 25 (1'), 32 (1%"), 38 (1½"), 50 (2"*), 75 (3"), and 100 (4")

Galvanized Steel Pipe

Better then steel pipe for plumbing installation More resistant to acid wasteBetter then steel pipe for plumbing installation More resistant to acid waste

Galvanized Wrought Iron Pipe

Durable and extremely corrosive resistant Easy to install Smooth interior surfaceDurable and extremely corrosive resistant Easy to install Smooth interior surface

Copper Pipe

Clasiffication of copper pipe:

K type - heaviest; recommended for underground installations L type- lighter; available in both rigid and flexible form; recommended for residential water supply line and radiant heating installations M type- thinnest; available only in rigid form; for small water supply lines and radiant heating installations

Most expensive Made of an alloy or zinc (15%) and copper (85%) Resistant to acids and has a smooth interior surface

Brass Pipe

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Lance Margaux Sampayan · 50問 · 2年前

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