Varec Flow Curve Question
Varec Flow Curve Question
(OP)
Good afternoon. First off, great site and forums! I'll get right to it.
I work for a company who services low pressure relief devices (Groth, Varec, Enardo, etc). I'm fairly new, and for my own curiosity I've been reading the manufacture's literature on different models, trims, applications etc. While looking at the Varec flow curves for a 0.5 Oz setting (0.865" WC), I noticed that the flow rates for say the 8" 2010B unit are different (pressure side aprox 34,000 SCFH vs the vacuum side aprox 25,000 SCFH). Why is this if the seat size and set point are the same?
Again, great site! Thanks,
Brandon
I work for a company who services low pressure relief devices (Groth, Varec, Enardo, etc). I'm fairly new, and for my own curiosity I've been reading the manufacture's literature on different models, trims, applications etc. While looking at the Varec flow curves for a 0.5 Oz setting (0.865" WC), I noticed that the flow rates for say the 8" 2010B unit are different (pressure side aprox 34,000 SCFH vs the vacuum side aprox 25,000 SCFH). Why is this if the seat size and set point are the same?
Again, great site! Thanks,
Brandon





RE: Varec Flow Curve Question
Until there's a uniform flow testing and certification by an independent body, we'll continue to see questions and challenges to the vendor published capacity curves.
RE: Varec Flow Curve Question
RE: Varec Flow Curve Question
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Varec Flow Curve Question
I think the main driver for generating uniform testing standards is to allow honest (apples-to-apples) comparison between devices from different vendors.
RE: Varec Flow Curve Question
I think the main driver for generating uniform testing standards is to allow honest (apples-to-apples) comparison between devices from different vendors. "
Agree! So maybe I'll learn to test and measure flow through all these guys low pressure valves :-p.
At the shop, we have a test stand to test set point popping and leak rates, but it would be fun just to test the actual flow through the units at a given pressure and set point to see how it jives w/ the reading material.