Tractorsport Flowbench Forum Archive

Posted: **Sun Dec 02, 2007 6:27 pm**

Found a 2" swing check valve last week for my Flow Bench. It fits snuggly in a 2-3/8" hole with no machining. I bought it at Hyjoca Plumbing supply. Its made by American Granby Inc. and the part number is SPCV200. It cost 22.00.

Ken

Posted: **Sun Dec 02, 2007 6:48 pm**

Picture please.

Posted: **Sun Dec 02, 2007 8:22 pm**

Here is a cropped pic of the valves Ken is refering to

Posted: **Mon Dec 03, 2007 6:27 pm**

I would make sure you have a nice entry radius on the inlet tubes of the valves and you are good to go.

Tom V.

Posted: **Mon Dec 03, 2007 6:36 pm**

How does those look inside/work?

Posted: **Mon Dec 03, 2007 8:22 pm**

The valve is very open inside with no restrictions. The walls are rather thin to the pipe parts and the valve is just a rubber disk with steel reinforcement. I am going to get more to cover the remaining holes. I get some interior pictures of them then.

Ken

Posted: **Thu Dec 20, 2007 3:01 pm**

Tom,
Very new to all this (no flow bench experience, new to the board and have Bruce's plans on the way). Electrical Engineer by trade and a semi full time machine shop for engines. I understand your request for the radius on the check valve. What is the downside of not having the radius on the valve? Would it be just a less efficient vacuum source?

Thanks
Marty

Posted: **Thu Dec 20, 2007 3:55 pm**

You need to "break" the sharp edge on the inlet side to the valve. The sharp edge acts like a sharp edged orifice and will restrict the flow through the valve to like 62% of the flow. With a radiused entry the air flow will be in the 98% of flow range.

Everyone has a starting point. With your EE background maybe you can help out with some of the electrical wiring questions.

Welcome to the board! I am a Research Engineer with the Ford Motor Company.

Posted: **Thu Dec 20, 2007 7:34 pm**

Thanks Tom,
As you probably know, having a engineering background leads people to beleive that if its electrical/electronic then we should be like a cresent wrench (able to fit any application). My 30 some years experience has been in the avionics/aviation field. Quite different than most electrial/electronics fields. However, I'm always willing to help as I can. Usually what I dont know, I can find out through my other friends. I feel almost like an infant with the flow bench/porting from what I have already read on this forum. Feels like I am always behind the power curve.
Thanks again
Marty Ester

Tractorsport Flowbench Forum Archive

Check Valve - No machining requires