Q&A Forum
Hi
im planning to build a hydraulic dynamomenter for snowmobiles up to 300hk and 250 nm.
I have got a quite big hydaulic gear motor/pump, 268,8 cm3/rev.
My problem is to find a valve with flow around 600-700 lpm. Can l find that?
l think a smaller valve will work if l run the dyno under force. but if l want to speed the engine up without using the brake ( zero pressure) it will not work.
maybe a cheap solutions is to bypass the valve with another valve that l can use manually or with yourdyno?
last question, is it possible to adjust a valve under pressure (250 bar)?
Best regards
glenn
Hi,
Yes, that's high... I believe a normal 1 inch Barrel flow control valve is rated for about 150-200 l/min, and even that with quite some back pressure, but I am not a hydraulic expert. The valve I used on my hydraulic brake was no problem to adjust under full pressure, but we tested only up to 85hp. It was similar to this: http://www.isis-fluid.co.uk/products/83/barrel-flow-control-valve-double-acting
Anyone else here knows? Or ask a hydraulic forum out there!
ok, thanks.
is it possible to use Directional Control Valves direct to yourdyno? or do l need something more to controll it?
like this one
https://www.dynexhydraulics.com/product/d08h-high-flow-valves/
You could connect a VM167 board or the relay plugin to control the valve if you are able to set it to some logic behaviour (e.g. if RPM is over a certain value). But it is probably easier to just do it manually with a switch.