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Three Way Valve
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John
Apr 24, 2020, 8:42:01 AM4/24/20
to
Mate has removed motor - should he be able to rotate the valve mechanism
quite easily?
quite easily?
The Natural Philosopher
Apr 24, 2020, 8:49:54 AM4/24/20
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On 24/04/2020 13:41, John wrote:
> Mate has removed motor - should he be able to rotate the valve mechanism
> quite easily?
>
yes. If not use plumbers wrench or moles to free it up. If it doesnt
> Mate has removed motor - should he be able to rotate the valve mechanism
> quite easily?
>
free up you need a new body as well as the motor
--
Gun Control: The law that ensures that only criminals have guns.
Unknown
Apr 24, 2020, 9:03:11 AM4/24/20
to
John has brought this to us :
Be aware that some valve are only designed to be rotated in one
direction - the motor turns them through a full 360 degrees to get to
the position needed. The other version only rotates back and forth
through 180 deg.
> Mate has removed motor - should he be able to rotate the valve mechanism
> quite easily?
Yes, the D should be almost able to be turned with your bare fingers.
> quite easily?
Be aware that some valve are only designed to be rotated in one
direction - the motor turns them through a full 360 degrees to get to
the position needed. The other version only rotates back and forth
through 180 deg.
Fredxx
Apr 24, 2020, 9:03:11 AM4/24/20
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On 24/04/2020 13:49:52, The Natural Philosopher wrote:
> On 24/04/2020 13:41, John wrote:
>> Mate has removed motor - should he be able to rotate the valve mechanism
>> quite easily?
>>
> yes. If not use plumbers wrench or moles to free it up. If it doesnt
> free up you need a new body as well as the motor
The motor might well be fine, though purchasing a complete valve
> On 24/04/2020 13:41, John wrote:
>> Mate has removed motor - should he be able to rotate the valve mechanism
>> quite easily?
>>
> yes. If not use plumbers wrench or moles to free it up. If it doesnt
> free up you need a new body as well as the motor
body/motor generally makes economic sense.
Unknown
Apr 24, 2020, 9:10:25 AM4/24/20
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It happens that Fredxx formulated :
spring return variety. In 40 years I have only had two motors fail,
more often its microswitch, or plastic body/ rotor jamming failures. I
have since changed to a type of 3 port valve which doesn't use a
spring, rather it rotates in just one direction to position.
The design seems much more sensible and under much less mechanical
stress and so likely to have a much longer service life. None the less,
I have a spare valve head in a box next to it, ready to pop on - just
in case.
> The motor might well be fine, though purchasing a complete valve body/motor
> generally makes economic sense.
Them failing in some way, became almost an annual task here of the
> generally makes economic sense.
spring return variety. In 40 years I have only had two motors fail,
more often its microswitch, or plastic body/ rotor jamming failures. I
have since changed to a type of 3 port valve which doesn't use a
spring, rather it rotates in just one direction to position.
The design seems much more sensible and under much less mechanical
stress and so likely to have a much longer service life. None the less,
I have a spare valve head in a box next to it, ready to pop on - just
in case.
John
Apr 24, 2020, 9:26:31 AM4/24/20
to
The Natural Philosopher <t...@invalid.invalid> wrote in news:r7un9g$h5s$2
@dont-email.me:
> On 24/04/2020 13:41, John wrote:
>> Mate has removed motor - should he be able to rotate the valve mechanism
>> quite easily?
>>
> yes. If not use plumbers wrench or moles to free it up. If it doesnt
> free up you need a new body as well as the motor
>
>
Approx how many degrees each side of centre should it turn? Drayton
@dont-email.me:
> On 24/04/2020 13:41, John wrote:
>> Mate has removed motor - should he be able to rotate the valve mechanism
>> quite easily?
>>
> yes. If not use plumbers wrench or moles to free it up. If it doesnt
> free up you need a new body as well as the motor
>
>
T i m
Apr 24, 2020, 9:32:21 AM4/24/20
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On Fri, 24 Apr 2020 12:41:59 GMT, John <Not.responding.@dotcom> wrote:
>Mate has removed motor - should he be able to rotate the valve mechanism
>quite easily?
Rotate, as in 360 Degrees? No. Rotate a few degrees either way and
>Mate has removed motor - should he be able to rotate the valve mechanism
>quite easily?
with your fingers, yes (or the one I last played with you could).
Imagine that inside there is a hard rubber ball on a short stick
connected to the spindle. Basically you can only move the ball between
the two internal openings of the two outlets (where the rubber ball
seals them off).
Cheers, T i m
The Natural Philosopher
Apr 24, 2020, 10:12:28 AM4/24/20
to
else knows better
--
Labour - a bunch of rich people convincing poor people to vote for rich
people by telling poor people that "other" rich people are the reason
they are poor.
Peter Thompson
Fredxx
Apr 24, 2020, 10:18:51 AM4/24/20
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rubber to cover and uncover ports.
Unknown
Apr 24, 2020, 11:04:10 AM4/24/20
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John submitted this idea :
> Approx how many degrees each side of centre should it turn? Drayton
They can normally spun all the way round.
Unknown
Apr 24, 2020, 11:06:01 AM4/24/20
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Harry Bloomfield, Esq. was thinking very hard :
degrees or so.
> They can normally spun all the way round.
Just the lose valve spindle that is, the head will turn it maybe 110
degrees or so.
Unknown
Apr 24, 2020, 11:07:02 AM4/24/20
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Fredxx presented the following explanation :
> A Drayton one I changed recently moved ~20 degrees. This used a disc of
> rubber to cover and uncover ports.
Is that a 2-port, or a 3-port?
> rubber to cover and uncover ports.
Fredxx
Apr 24, 2020, 11:38:24 AM4/24/20
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Chris B
Apr 24, 2020, 11:39:16 AM4/24/20
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or 30 degs.
Here is an image of the insides
http://www.freeheatingadvice.com/wp-content/uploads/2018/04/honeywell_3-port_motorised_valve_ball.jpg
--
Chris B (News)
Chris B
Apr 24, 2020, 11:45:53 AM4/24/20
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picture comes from
http://www.freeheatingadvice.com/articles/honeywell-motorised-valve-faults/
--
Chris B (News)
Fredxx
Apr 24, 2020, 11:53:08 AM4/24/20
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On 24/04/2020 16:06:58, Harry Bloomfield wrote:
This gives a (poor) diagram of wedged shaped piece of rubber that
prides a flat surface to seal each port. This 'wedge' is on an arm and
perhaps the detail of the wedge indicates the lack of movement for all
three positions (assuming a mid-position valve).
Clive Page
Apr 24, 2020, 4:53:08 PM4/24/20
to
--
Clive Page
Unknown
Apr 25, 2020, 3:59:11 PM4/25/20
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Clive Page presented the following explanation :
The general type is called a MOMO actuator - Motor On, Motor Off. I was
so fed up with the spring return design of 3-port actuator failing, I
had decided I ought to attempt a design of my own, then I came across
the Sunvic 1901 MoMo valve and actuator.
It was electrically a rather clever design, which was a direct
electrical swap for my spring return Sunvic valve, but I had to swap
the valve and actuator over to the 1901 as a pair. Old valve is
designed to work back and forth, through limited degrees. 1901 valve is
designed to rotate only clockwise to position.
It's one flaw, seems to be it is susceptible to water damage, unless
mounted actuator uppermost. Because it may have turn the valve through
almost 360 degrees to position, it can take it an extra minute to fire
the boiler on a change in demand, but it consumes almost no current to
maintaining position. None the less, I keep a spare 1901 actuator ready
to just fit.
This site is worth a read -
http://www.seered.co.uk/sunvic_unishare_waterdamage.htm
so fed up with the spring return design of 3-port actuator failing, I
had decided I ought to attempt a design of my own, then I came across
the Sunvic 1901 MoMo valve and actuator.
It was electrically a rather clever design, which was a direct
electrical swap for my spring return Sunvic valve, but I had to swap
the valve and actuator over to the 1901 as a pair. Old valve is
designed to work back and forth, through limited degrees. 1901 valve is
designed to rotate only clockwise to position.
It's one flaw, seems to be it is susceptible to water damage, unless
mounted actuator uppermost. Because it may have turn the valve through
almost 360 degrees to position, it can take it an extra minute to fire
the boiler on a change in demand, but it consumes almost no current to
maintaining position. None the less, I keep a spare 1901 actuator ready
to just fit.
This site is worth a read -
http://www.seered.co.uk/sunvic_unishare_waterdamage.htm
tabb...@gmail.com
Apr 26, 2020, 8:02:21 AM4/26/20
to
On Friday, 24 April 2020 13:42:01 UTC+1, John wrote:
> Mate has removed motor - should he be able to rotate the valve mechanism
> quite easily?
Yup. If it won't move you'll need a new baseplate or body, depending on how yours is put together.
> Mate has removed motor - should he be able to rotate the valve mechanism
> quite easily?
NT
T i m
Apr 26, 2020, 8:53:46 AM4/26/20
to
'O' ring and retained by a clip so could be stripped, cleaned and
lubed (silicone grease?).
I've done that sort of thing loads of times, just to get something
fixed 'for now' and it's still been working years later.
Cheers, T i m
tabb...@gmail.com
Apr 27, 2020, 12:49:00 PM4/27/20
to
On Sunday, 26 April 2020 13:53:46 UTC+1, T i m wrote:
I believed that too until I removed the circlip. It still doesn't come out, and I didn't see any way to readily remove the spindle. Unnecessary obsolescence.
I wish it were practical to discourage that sort of unnecessary destructive business strategy, but I don't see how. Perhaps some sort of kitemark that indicates a product can be completely stripped down without significant destruction?
NT
I wish it were practical to discourage that sort of unnecessary destructive business strategy, but I don't see how. Perhaps some sort of kitemark that indicates a product can be completely stripped down without significant destruction?
NT
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