The zone valve in any house is one of the most important components as it plays a vital role in controlling the flow of water or steam in any hydraulic cooling and heating system. The reason why it is called a zone valve is because it improves the efficiency of the cooling and heating of specific infrastructural zones.
The zone valves which are sold today are electrically powered and are commonly used in residential housing as in large commercial or industrial installations; compressed air or vacuum is the preferred method of distributing temperature. In specific when we speak about the working of an electrical zone valve, the small shaded-pole synchronous motor is combined with a rotary switch which can then disconnect the motor either by stopping points ones the zone has reached its desired temperature. A zone valve can be easily constructed using wax motors and spring-return mechanism. Generally, in a house, there are more than one zone valves which allow the cooling and heating of various rooms without affecting other parts of the house. But this does not mean that they do not cause any problems as there is almost nothing in the world which does not has a flaw in it. Thus the following are the most common problems in a zone valve.
Higher failure rate
If there is one thing why zone valves are losing their popularity drastically, it is because of their reliance on electric timing motors to work, which if ones failed it does not make the zone valve work. There is no form of ‘Failsafe’ system in this thus making it highly unreliable at times.
Utterly reliant on a Single Circulator pump
One of the essential components on which a zone valve is entirely reliant for its function is the single circulator pump. And due to the constant failure of them due to the many effects it generally makes the zone valve completely useless too.
Uneven heat distribution
One of the main problems of the zone valves is that due to multiple of them installed in one single building at times, the various types of requirements might make the zone valve to malfunction. This can result in one part of the building being extremely warm while the other will be extremely cold even without the request of the temperature to be changed.
Causes ripple effect on other thermostats
In many cases, it has been found that after the installation of a zone valve when it is being used continuously, it tends to malfunction by merely rotating the rotator even after it has been opened. This leads it to generally shutting off all the other thermostats around the house, causing an imbalance in the temperature.
End switch failure
Generally, when a specific zone calls for the heat, that particular zone valve opens, and an end switch tells the circulator pump to turn on and flow water or steam to heat the room. The problem is not with this, but at times when that specific zone reaches the desired temperature due to the intense amount of heat the zone valve won’t be able to close at this has been known to cause internal water damage to the structure of the building which then makes that section more of a liability