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Frequently Asked Questions
How is the right actuator chosen?
Start from the valve, not the actuator.
Mounting patterns are not standardised.
Identify what is already installed first.
Obsolete or unbranded valves complicate retrofit.
Replacing valve and actuator together is often cheaper.
Adapters are rarely worth pursuing.
How much torque is needed?
More than a new valve demands.
Seals stiffen and scale forms over years.
An actuator sized on a new valve stalls on an old one.
Stalling can leave the valve part-open.
Water then goes to two destinations at once.
Allow margin above the published requirement.
What are the cams for?
They define the end positions of travel.
Commissioning them properly is essential.
Badly set cams leave the valve short of position.
The symptom looks exactly like insufficient torque.
The two are frequently confused on site.
Check cam setting before replacing the unit.
Why does a manual override matter?
Failures happen and the pool must keep circulating.
Somebody has to move the valve by hand.
Some units cannot be released without removal.
That is a poor choice for a working plant room.
A visible position indicator helps as well.
Ask to see the override before ordering.
What is the usual failure mode?
Water ingress into the housing.
Plant rooms are humid and often wet.
Ingress protection rating is the specification.
Mounting orientation affects it in practice.
Cable entry from below sheds water better.
Gearing and limit switches follow as failure points.