Fast linear actuator for a linear surge valve

[Steveb]

That's who I was looking at for my gate valves but I thought these blade valves have steel shafts? I'll have to call to find out.

Did you ever find out if the steel shaft was protected?

 

[_shorty_]

If you are concerned with the material of the shaft, you could run the valve horizontally near the uppermost level of the water so the shafte isn't actually IN the water. You could simply do a syphon action that is started and stopped by the actuation of the knife valve. That seems like a good option if you want to use the linear actuator. You could probably even use a cheap step motor or something to actuate, unless just hard bent on the linear actuator.

 

[karimwassef]

I haven't checked the valve construction yet.

I do like cheap if it's robust. What step motor would you recommend?

 

[Steveb]

Here is the reply I got to my question - Is the handle rod protected from the fluids going through the valve?

Dear Mr. Baring,

Thank you for contacting us. The handle is indeed protected from whatever may be flowing through the valve, as the Plastic/Stainless Steel paddle is the only part touching the fluid, besides the sides of the valve itself, in order to stop the follow of fluid. You can view and purchase Slice Gate Valves from our page: http://www.plumbingsupply.com/slicegatevalves.html

We do hope this information is helpful, and that you would not hesitate to contact us if we can be of any further assistance.

Thank you, Doni

I'm glad that was the answer as I had already purchased a 2" valve to shut off flow from my sump to Reeflo should it need servicing.

 

[karimwassef]

The stainless steel shaft is the problem. This confirms contact between this and the saltwater.

Maybe in a normally opened (shaft recessed until service is needed), this is ok... But I wouldn't do it.

 

[Steveb]

I'm asking for clarification. Specifically about the shaft that the paddle and handle are attached to.

 

[karimwassef]

Baring, I would not use a SS shaft in saltwater.

 

[Steveb]

Agreed.

So the knife valve is out. To bad. I really liked the fact that it did not take up much room...

Hi Steve,

Yes - depending on the installation, the shaft could come in contact with the liquid when in the open position.

Belinda Garcia
Customer Service
Valterra Products
15230 San Fernando Mission Blvd., #107
Mission Hills, CA 91345
Ph. 818.898.1671 Fax. 818.361.5389