• Advertisement

Possible pinch valve problem

  • Advertisement

Possible pinch valve problem

Postby emoj » November 13th, 2018, 10:35 am

Hi
My scm system hasn't worked in a few years. Recently I reconfigured my air regulators by adding one directly to the pinch valve. I have over 100psi coming from the compressor, 60psi to pinch valve and 40psi to pressure pot. My problem is that the pinch valve doesn't seem to function. When I step on my foot pedal I get a little air flow (no media) and slowly the air flow will stop. Prior to my air regulator reconfiguration I replaced the bladder in the pinch valve. This might not be the problem, just trying to cover all bases. Any help is greatly appreciated and thanks in advance.
emoj
 
Posts: 8
Joined: November 8th, 2018, 2:18 pm

Re: Possible pinch valve problem

Postby Eriks » November 14th, 2018, 1:46 am

I'm wondering if you've got your connections on your foot valve swapped around. Some of these valves only work one way, and if you connect them the wrong way they can't release the air pressure, which would prevent your pinch valve from opening. Not that I would have ever done this myself.... ;)

Cheers,
Eriks
Benchmark Engraving & Awards - Australia
http://www.benchmarkengraving.com.au
and also:
http://www.bluestreaksix.com
User avatar
Eriks
 
Posts: 164
Joined: August 15th, 2010, 4:33 pm
Location: Australia

Re: Possible pinch valve problem

Postby emoj » November 14th, 2018, 1:52 pm

Thanks Eriks for such a quick response. I considered that, checked and even swapped the lines. I get nothing but air through the hose into my cabinet.
Thanks again, any suggestion is more then welcome.
emoj
 
Posts: 8
Joined: November 8th, 2018, 2:18 pm

Re: Possible pinch valve problem

Postby Eriks » November 15th, 2018, 1:01 am

Are you able to post some photos of your pressure pot setup? Perhaps being able to see what you have and how it's configured or connected together might help to spot something unusual.

Cheers,
Eriks
Benchmark Engraving & Awards - Australia
http://www.benchmarkengraving.com.au
and also:
http://www.bluestreaksix.com
User avatar
Eriks
 
Posts: 164
Joined: August 15th, 2010, 4:33 pm
Location: Australia

Re: Possible pinch valve problem

Postby Terry W » November 15th, 2018, 7:50 am

Good morning Emoj

If you have air coming out the nozzle then check to see if the pot is also pressurized. You may have to open the bleed valve. I don't have that setup so can't tell you where it is.

If you have pressure in the pot and air comes out the nozzle, I would say the grit in the bottom of the pot is caked hard and blocking any loose grit from entering the mixing valve. If the pot does not pressurize then you have another issue.

You may get more answers if you go to the Parlor and introduce yourself. Most folks here like to know who they are talking with. :TU:
Terry
Terry W
 
Posts: 1668
Joined: June 13th, 2010, 2:55 pm

Re: Possible pinch valve problem

Postby emoj » November 15th, 2018, 5:44 pm

Eriks thanks again for your response. Just took some pictures and have been trying to figure out how to upload them. Any ideas how?
Hi Terry and thank you for your response and suggestion. I do have a release valve and the tank is pressurized. The problem is the pressure from the foot pedal to the diaphragm. When pedal isn't pressed I get continuous air flow, and when pressed same thing. I switched hoses around same issue. Also I did stop by the Parlor and introduce myself. I'm Elliott.
emoj
 
Posts: 8
Joined: November 8th, 2018, 2:18 pm

Re: Possible pinch valve problem

Postby Eriks » November 16th, 2018, 2:08 am

When you click on the "Post Reply" button and get taken to the screen where you enter your text, scroll down a bit and click on the "Upload attachment" tab, this will allow you to select a file or files to upload. Ideally any photo should be in JPEG format.

Cheers,
Eriks
Benchmark Engraving & Awards - Australia
http://www.benchmarkengraving.com.au
and also:
http://www.bluestreaksix.com
User avatar
Eriks
 
Posts: 164
Joined: August 15th, 2010, 4:33 pm
Location: Australia

Re: Possible pinch valve problem

Postby Kelly Harris » November 16th, 2018, 6:45 am

If you don't have enough pressure to the pinch valve it won't operate properly. I don't know who's pinch valve you have, maybe call SCM for specs, but this is from the Richway website, "Required actuation pressure is generally 20 to 40 psi greater than media pressure. It’s recommended that the actuation air pressure be set just high enough to get complete valve closure. Using higher actuation pressure than is required to get complete media shut off can reduce sleeve life".
PS CS2, CD X4, Acer laptop, Canon 700F scanner, HP laserjet 1600 printer, Epson Stylus 1400 printer, Intuos 4 tablet, Letralite, Summa D610 plotter, 2 cabinets, 2 pressure pots, 60 gallon air compressor, Fuji S8100 DSLR.

Kelegant Studios
User avatar
Kelly Harris
Moderator
 
Posts: 3478
Joined: June 4th, 2010, 6:05 am
Location: Edmonton, AB, Canada

Re: Possible pinch valve problem

Postby emoj » November 16th, 2018, 10:11 am

Hi Eriks, the only tab I see is an options tab. I'll keeping working on my equipment and will let you know how things are by next week.
emoj
 
Posts: 8
Joined: November 8th, 2018, 2:18 pm

Re: Possible pinch valve problem

Postby emoj » November 16th, 2018, 10:39 am

Hi Kelly, I do have a Richway pinch valve and have psi set at 60 and 40 at the pot. I'll increase at the valve to 70 or 80psi and see if that will help.
Thanks for your reply.
emoj
 
Posts: 8
Joined: November 8th, 2018, 2:18 pm


Return to Pressure Pots

Who is online

Users browsing this forum: No registered users and 1 guest

  • Advertisement
cron