Hi all. I have a air pressure supply of 4 bar and I need to reduce it to say a few thousands Pa. What I have now is a pressure regulator that can reduce the pressure to 0.1 bar, but I need a even smaller pressure. Is there any device that I can use? I heard something called throttle valve? is it something I can use? It reduces pressure by percentage or to a certain level? Please kindly help. Thanks.