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20 Cards in this Set
- Front
- Back
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A Valve suitable as a stop (or isolating) valve, where conditions require either full flow or no flow
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Gate Valve
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Ideal for throttling or regulating flow with a minimum of wire drawing and seat erosion
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Globe Valve
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Designed to allow precise flow control
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Needle Valve
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Prevents reversal of flow in piping
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Check Valve
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Name the 1/4 turn valves
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1.Butterfly
2.Ball 3.Plug |
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Name the two valves commonly used on the steam outlet of a boiler
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1.Gate Valve
2.Globe Valve |
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True or False:
Needle Valves are used extensively for continuous blowoff or chemical feed control devices |
True
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Two industries where butterfly vavles are commonly used in process applications
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1.Thermal and Hydroelectic Power Stations
2.Oil and Gas Processing Industries |
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Two industries where ball valves are commonly used in process applications
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1.Paper Industries
2.Chemical Plants |
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True or False:
The Plug Valve is not a 1/4 turn valve |
False
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A Check Valve prevents what
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Reversal of Flow
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Two Basic types of check valves
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1.Swing check valve
2.Lift check valve |
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Pressure reducing valves are used for the delivery of city water etc. because:
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The supply pressure is considerably higher then the service pressure
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Cast Iron Valves are good for:
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Low Pressures and Temperatures
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Bronze Valves are good for:
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Moderate Pressures and tempetatures to 280 Celcius
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Carbon Steel Valves are good for:
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Moderate Pressures and temperatures up to 425 Celcius
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Special Alloy Steel Valves are good for:
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Temperatures in excess of 650 Celcius
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Stainless Steel Valves are good for:
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Corrosive services
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What is done when pipe fittings are not properly or clearly identified
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The fittings are should be rejected and not be put into service
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What as a minimum must all pipe fittings have marked on them legibly
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1.Manufacture Name or Trademark
2.Service Designation 3.Material Designation |
