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Automated
Valve FAQ's
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| 1 |
The
actuator on my automated valve operates , but the valve won't turn.
Why? |
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| Most
likely the valve stem or actuator coupling is broken. |
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| 2 |
Why
doesn't my valve open or close completely when the actuator operates it? |
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| The
electric actuator limit switches, or the pneumatic actuator position stops
are not correctly adjusted. |
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| 3 |
When
I energize the solenoid on my pneumatic actuated valve, the valve won't
turn. How come? |
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| Probably
because there is no air pressure to the solenoid or dirt has jammed it.
Debris might be trapped inside the valve. Or , the air pressure is not
sufficient to operate the actuator. Remember to measure air press at the
actuator, not at the compressor. |
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| 4 |
Can
I buy an actuator from one manufacturer and mount it to a valve from another
manufacturer? |
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| Maybe.
The actuator torque output must be sufficient to turn the valve reliably.
Someone will have to fabricate a custom mounting bracket and coupling. |
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| 5 |
What
happens if I lose power to my electric actuator in the middle of an actuation
cycle? |
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| The
valve stops somewhere between full open and close. When power is
reapplied to the original circuit, the actuator completes the cycle. |
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| 6 |
I
ordered a fail open pneumatic actuated valve by mistake. I needed a fail
closed one. What can I do? |
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| To make
the change just remove the actuator from the valve and turn it or the
valve stem 90 degrees and remount the actuator. |
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| 7 |
I've
installed my automated valve in the line, but now I don't know if the valve
is in the open or closed position. How can I find out? |
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| Remove
the actuator from the valve and check the valve stem. Most ball valves
have stem flats at right angles to the flow when the valve is in the off
position. On butterfly valves check the stem flow arrow marking. |
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| 8 |
Do
I have to have the solenoid valve that controls the air supply to my pneumatic
actuator mounted right on the actuator? |
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| Nope,
a remote location is fine just make sure that the air pressure at the actuator
is sufficient to power it. The air pressure at the actuator may be less
than the pressure at the remote solenoid, be sure to check it. |
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| 9 |
How
do I wire up my electric actuator? |
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| Check
the electric wiring schematic that came with the actuator for the correct
hook up. Sometimes a copy is inside the actuator cover. Missing?
Don't guess about the connections. Call the manufacturer for a schematic. |
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| 10 |
I've
just installed an electric actuated valve and when I power it, it turns
the valve 360 degrees and won't shut off. What's wrong? |
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| The
actuator is wired incorrectly (check the schematic), or the external control
switch is not the correct type for the actuator. |
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| 11 |
My
electric actuators cycle time is way too fast, can I slow it down? |
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| Not
unless you bought it with an optional speed control. Otherwise, you'll
have to splice the actuator or if possible, install a speed control option. |
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| 12 |
I
just replaced a solenoid valve with an electric actuated valve and it won't
work. Why? |
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| Actuators
and solenoid valves require different types of electrical control switches.
SPDT for actuators, SPST for solenoids. Check the actuator wiring schematic
for the correct wiring and switch type. |
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Back
to Hayward Back to PEP
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Copyright
HAYWARD Industrial Products, Inc. 1999
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Automated
Valve FAQ's