Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1993-06-01
1994-04-12
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
G05D 701
Patent
active
053017137
ABSTRACT:
A constant flow rate controller valve includes a piston spring biased towards the top of the valve. Fluid flowing into the valve increases the forces in the chamber above the piston, forcing the piston toward a valve seat. The piston is thus seated in the valve seat, blocking fluid flow to the outlet port. The forces on the piston in the chamber below the piston builds as flow goes through the piston until the forces in this chamber including the piston spring force is greater than the forces in the chamber above the piston. The piston then is lifted from the valve seat, and the pathway to the outlet orifice is opened. Fluid flows through the piston via the calibrated orifice. An equilibrium flow rate is reached by variation in the piston position based on the location of the movable seat which sets and maintains a constant differential pressure.
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