In article ,
dennis@home wrote:
On 23/10/2019 21:31, wrote:
On Wednesday, 23 October 2019 18:15:26 UTC+1, T i m wrote:
On Wed, 23 Oct 2019 16:30:30 +0100, charles
wrote:

snip

You can buy two port valves with switches to turn them off at end of
travel but they cost more than the stall motor, spring return valves.

Trouble with spring return vales is they are noisy when they close..

I'm not sure if there any that work like a solenoid but the return
spring jobby I have in my hand right now is near silent in operation
(both ways).

Cheers, T i m

There are 2 types, motorised & solenoid. The latter are cheaper & noisy. AFAIK both use spring return.


NT


A third type has motorised open and return but the wiring is slightly
more and they cost more.
They are quiet.

yeas - I replaced ac spring return one this summer.

--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle