Term
| Dry or Direct feed gas chlorinator disadvantages |
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Definition
- only a low back pressure can be used at the point of application.
- very few gas chlorinators are of this design. |
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Term
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Definition
| an enclosed space in which the pressure has been reduced below the surrounding atmospheric pressure. |
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Term
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Definition
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Term
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Definition
the force applied tby the gas over an area.
generally stated in Psi |
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Term
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Definition
Psig (gauge)
Psia (absolute)
Psid (differential) |
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Term
True or False;
A compound gauge indicates both pressures above and below ambient. |
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Definition
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Term
| Liquid filled gauges are filled with ____ |
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Definition
Glycerine or Silicone
Filled to at least 75% of volume |
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Term
| Advantages of liquid filled gauges |
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Definition
protection against:
vibration
pulsation
ambient corrosives |
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Term
True or False;
A rotameter is a feed rate indicator |
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Definition
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Term
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Definition
| a tapered glass tube with a round ball or float inside used to measure a flow rate of liquid or gas |
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Term
True or False;
Gas flow through a rotameter is measured at the top of the ball/float |
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Definition
False;
the measurement is taken from the center |
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Term
| Feed rate control valve allows |
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Definition
| chlorine feed rate to be changed manually or automatically |
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Term
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Definition
| is designed to vent or release incase of over/under pressurization |
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Term
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Definition
| use the principles of venturi tubes to pull a vacuum, causing chlorine to enter the water |
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Term
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Definition
Amount of chlorine to be fed.
Amount of water pressure available.
Amount of back pressure. |
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Term
True or False;
Injectors should be sized to be 2 1/2 x back pressure |
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Definition
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Term
| Two types of water operated injectors are |
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Definition
fixed throat
adjustable throat |
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Term
True or False;
Fixed throat injectors are used in applications where the chlorine flow is low. |
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Definition
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Term
| Adjustable throat injectors allow |
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Definition
| for conservation of injector water by adjustment of availalbe vacuum |
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Term
True or False;
A vacuum breaker must be installed at the high point of discharge line to prevent syphoning. |
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Definition
True;
Also known as anti-syphon injector |
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Term
| Types of gas chlorinators according to vacuum regulation |
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Definition
Differential regulation
Vacuum valve regulation
Sonic regulation |
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Term
True or False;
Differential regulation is the most accurate type of feed rate. |
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Definition
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Term
| Advantages of differential regulation |
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Definition
Most accurate
Suitable for automatic control
Will not plug easily |
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Term
| Disadvantages of differential regulation |
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Definition
Most complicated design
Most parts
Most expensive |
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Term
| Advantages of vacuum valve regulation |
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Definition
Less parts
Less expensive
Will not plug easily |
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Term
| Disadvantages of vacuum valve regulation |
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Definition
Less accurate
Not used with automatic control |
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Term
| Advantages of sonic regulation |
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Definition
Less parts
Least expensive
Allow for multiple rate feed tubes |
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Term
| Disadvantages of sonic regulation |
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Definition
Tends to plug
Requires high injector vacuum |
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Term
|
Definition
Pressure chlorinator
Remote vacuum chlorinator
Cylinder mounted chlorinator |
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Term
|
Definition
| use multiple cylinders avoiding interupting the chlorination procedure |
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