Mini-Flo - Automatic Flow Rate Controller

Materials of Construction

• Body Material: 316 Stainless Steel, Brass, Zytel (Nylon)
• Internals: 316 Stainless Steel, 304 Stainless Steel
• Seals Buna, Viton (Contact factory for other materials.)

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Since the regulator always maintains the same pressure drop across the orifice, the flow rate is determined by the size of the fixed orifice and the differential pressure setting.

A constant pressure drop across the orifice is maintained by a piston-valve. The valve port opening is regulated by the relative positioning of the piston-valve. The piston-valve moves up or down as inlet or outlet pressure fluctuates.

The piston-valve is loaded downward by the pressure at the regulator inlet, which is also the pressure upstream of the metering orifice. It is loaded upward by the pressure of the downstream side of the orifice plus a spring whose force is equal to the orifice pressure drop.

Therefore, the piston-valve will be in balance only when the pressure drop across the metering orifice is at the set value. Any variation in this pressure drop will cause instant corrective action; the imbalance on the piston-valve will change the valve port opening, as required.The orifice pressure drop is immediately restored to its correct value and the flow is maintained at the set rate.