Constant flow rate controller valve

Details Constant flow rate controller valve Constant flow rate controller valve

1988-09-30

1990-01-16

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

251 80, G05D 701

Patent

active

048936499

ABSTRACT:
A constant flow rate controller valve includes a piston spring biased towards the top of the valve. Fluid or gas flowing into the valve increases the pressure in the chamber above the piston, forcing the piston toward a valve seat. A pin type valve stem is thus seated in the valve seat, blocking gas or fluid flow to the outlet port. The pressure in the chamber below the piston builds until the pressure in this chamber plus the piston spring force is greater than the pressure in the chamber above the piston. The piston then lifts the valve stem from the valve seat, and the pathway to the outlet orifice is opened. Fluid or gas flows through the piston via the caibrated orifice. An equilibrium flow rate is reached by variation in the piston position based on the interaction of the above gas or fluid pressures and spring force.

REFERENCES:
patent: 2655935 (1953-10-01), Kinzbach
patent: 3593742 (1971-07-01), Taylor
patent: 3729018 (1973-04-01), Butterfield
patent: 3741242 (1973-06-01), Hansen
patent: 3958596 (1976-05-01), Garrard
patent: 4175584 (1979-11-01), Rikuta
patent: 4230147 (1980-10-01), Booth et al.
patent: 4510993 (1985-04-01), Luetzelschwab
"A Novel Approach to Flow Control for Chemical Injection and Continuous Sampling", M. S. Shelton, Society of Petroleum Engineers Publication Number 16910, pp. 329-338, Sep. 1987.

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