MADE IN USA. The EVKeg is a safe, durable polyethylene beer keg (150 PSI capability) that has the unique features of using an ozone sanitized liner that is replaced with every fill eliminating the need for keg cleaning, and a self setting pressure relief valve that prevents the keg from accidental over pressurization.
Orifices are generally used as measuring and hydraulic control devices. Orifice. hydraulics control the function of many submerged inlet - free outlet culverts, primary spillways in detention facilities, manholes in conduit flow, and in storm drain.
RE: Calculating flow through 2 orifices. As kcj said, the second orifice raised the system pressure up to or above some controlling component pressure setting and flow decreased. If the motor does not have a case drain for the shaft seal, you run the risk of overpressuring the shaft seal by putting an orifice downstream of the motor.