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