Lifebreath CAF-02-MB Uživatelský manuál stáhnout pdf (Strana 7)

Manual Valves

There are a number of manual valves required for

the system to operate properly and safely. These

valves are used as shut off valves, drain valves

and throttling valves. They can be globe, gate,

ball or balancing type valves.

The globe valve can be used as a shut off, drain

or throttling valve. Even in the open position, the

valve is fairly restrictive to flow. It has a much

greater equivalent length (resistance) than the

other types of valves.

The gate valve can be used as a shut off or drain

valve. When in the open position, there is very

little resistance to flow. Gate valves have a

greater susceptibility to chatter (noise) and

malfunction with age. Gate valves tend to be less

expensive than the other type of valves.

The ball valve can be used as a shut off or drain

valve but not a throttling (balancing) valve. When

in the open position, a full bore ball valve has very

little resistance to flow, and these valves tend to

be both the least expensive and the

least susceptible to seizing over time. Do not

use reduced bore ball valves as they are very

restrictive to water flow.

The balancing valve can be used as a throttling

valve. It can make small flow changes easily and

has lower resistance than a globe valve. This

valve will be considerable more expensive.

Balance Valve

Ball Valve

Globe Valve

Gate Valve

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Lifebreath CAF-02-MB Uživatelský manuál Strana 7