Actuated valve for Drain line
Actuated valve for Drain line
(OP)
Hi,
I need to use an actuated valve on a sewer line (2 in. dia.). I want to drain when signal applied and closed when there is no signal. The water is coming from a car-wash operation. What should I look for in selection of valve and who are the manufacturers?
Thanks,
I need to use an actuated valve on a sewer line (2 in. dia.). I want to drain when signal applied and closed when there is no signal. The water is coming from a car-wash operation. What should I look for in selection of valve and who are the manufacturers?
Thanks,





RE: Actuated valve for Drain line
This is a car wash drain line that I need to cycle the valve off and on to let it drain on to the main line.
Who are some of the manufacturers?
Thanks,
RE: Actuated valve for Drain line
Cheers
RE: Actuated valve for Drain line
The main thing to worry about from what you have told us is to ensure that the actuator is capable of operating at the frequency you need it to. Some are limited to x number of starts per minute/hour/etc so if you are cycling your valve a lot, make sure your actuator is suitable.
RE: Actuated valve for Drain line
I am wondering why you want a valve on the sanitary piping.
Is the flow by gravity or is it pumped? You said it was a 2" line which seems to indicate it is pumped. Most plumbing codes I am familiar with would not allow a 2" gravity pipe.
If it is pumped, then there is probably a tank. If so, I would not use a valve to control flow. I would use level controls to control the pump.
RE: Actuated valve for Drain line
If sand and oil:
a) Knifegate valve
b) Gatevalve, resilient seated
c) 'Saunders type'
d) 'Pinchvalve'.
NBR or other oil resistant sealing material required.
Choice a), knifegate, air operated (carwash = pressurised air available?) is in my opinion best/cheapest.
RE: Actuated valve for Drain line
-The valve will cycle about every 2 minutes.
-The reason for the valve is that we want to close off drain for a short period about 2 minutes then allow gravity drain.
-My concern for the valve type is the dirty water handling feature. Possible small amounts of sand and oil that would drip off the bottom of a car during the rinse cycle- not the wash cycle. The wash cycle drain is handled by a separate system.
Regards,
RE: Actuated valve for Drain line
Are you wanting to hold the flow back for some reason?
If you are worried about sand and/or oil, put in an interceptor to allow the sand to settle and the oil to float. Then you can discharge by gravity.
RE: Actuated valve for Drain line
Golestan:
Your idea is generally good, but 2 minutes may be too little time to allow the separation you are aiming for (but anything helps).
Check for local restrictions for outlet, general arrangement and system requirements and more advanced separation systems commercially available for your branch.
The valve suggested, though, will work. Keep it greased with waterproof and oilproof grease, dont mount it with knife clamped too tight, and allow for some operational time to open and close (observation at location).
RE: Actuated valve for Drain line
You would probably be better off using a sump pump for this application instead of a valve.