Patent ID: 9746856
Date: 2017-08-29
CPC Classifications: F16L,G05D

Claim:
1. A multi-hole orifice plate for flow control used in a pressure-controlled flow controller comprising a control valve and a pressure detector, the multi-hole orifice plate having a plurality of orifices, wherein the plurality of orifices have a total opening area corresponding to an opening area of a single orifice necessary for the passage of a gas at a rated or full scale flow rate of the pressure-controlled flow controller; and wherein the multi-hole orifice plate has a thickness of 20 to 200 μm, the plurality of orifices each have a bore of 0.010 to 0.200 mm, the number of the plurality of orifices is 2 to 100, and the plurality of orifices are formed by pressing.