Electronic valves that don't require pressure to operate
- Thread starter lightnb
- Start date
What are you trying to do ?
There are solenoid valves of all sizes
http://www.freshwatersystems.com/c-496-solenoid-valves.aspx
There are solenoid valves of all sizes
http://www.freshwatersystems.com/c-496-solenoid-valves.aspx
I used them, by replacing them on appliances... not sure what you're trying to do.
If you have specs on what you need, your best bet is probably an appliance parts store.. guys there should be knowledgeable on all the different water valve solenoids available and can probably suggest something based on what you're trying to do.
If you have specs on what you need, your best bet is probably an appliance parts store.. guys there should be knowledgeable on all the different water valve solenoids available and can probably suggest something based on what you're trying to do.
You are looking for a solenoid valve known as "normally closed". When it is at rest (in the box), it is closed. Here is a link to several that are all plastic and are suitable for even reef systems.
http://www.freshwatersystems.com/p-...ff-solenoid-valve-with-qc-fittings-24vac.aspx
You can also find many on eBay (but takes time wading through many that won't do).
http://www.freshwatersystems.com/p-...ff-solenoid-valve-with-qc-fittings-24vac.aspx
You can also find many on eBay (but takes time wading through many that won't do).
We use solenoid valves for emergency oxygen at the fish farm where I work. When the power is on, they are closed; but if the power goes out, they open up, bleeding oxygen directly into the tanks. They are also programmed to release O2 if the dissolved oxygen drops below a certain value.
Search ebay for "Gravity Valves" and you'll find valves that only need very low pressure to open.
Dishwasher valves look promising. I'm trying to find manufacturer specs of one of them. I would be concerned that they aren't rated for continuous use, and it looks like they draw 28W when opened? Also it looks like the standard size for them is a 5/8" hose barb.
Dishwasher valves look promising. I'm trying to find manufacturer specs of one of them. I would be concerned that they aren't rated for continuous use, and it looks like they draw 28W when opened? Also it looks like the standard size for them is a 5/8" hose barb.