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Proportion-Air, Inc. - HVC: Cost Efficient Closed Loop Regulator

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HVC: HIGH VOLUME / LOW COST PRESSURE CONTROL

The HVC cost efficient regulator is ideally suited for high volume, low cost, OEM applications requiring closed loop control and high forward and/or relief flow rates. The HVC can proportionally control pressure ranges up to 150 psig.

The HVC's greatest asset is its flexibility. By utilizing shock and vibration resistant technology inside an IP65 housing the HVC can be mounted nearly anywhere in any orientation. The integral pilot operated regulator allows HVC to operate equally well under flow or static volumes. The internal pressure sensor provides closed loop control that won't change over time. The HVC is incredibly repeatable and accurate.

The HVC is compact and can be manifold mounted. It is 2 inches square and less than 4.5 inches tall.

HVC - Brochure (pdf) (1,62 MB)

Functional Description

The HVC is a closed loop pressure regulator consisting of two solenoid valves, an internal pressure transducer, and electronic controls all integrally mounted to a volume booster.

Theory of Operation

The output pressure is proportional to an electrical input or command signal. The pressure is controlled by activating the solenoid valves, which control the pressure in the pilot side of the volume booster. One solenoid valve functions as inlet control, the other as exhaust. The volume booster is a piston operated mechanical amplifier which converts the small flow rate pilot signal into a large flow rate output. The pilot pressure and output pressure operate on a 1:1 ratio.

The output pressure is measured by a pressure transducer that senses pressure in the output port of the HVC and provides a feedback signal to the electronic control circuit. This feedback signal is compared to the command signal input. Any differences between the command signal and the actual pressure feedback signal causes one of the solenoid valves to open to adjust the pressure in the pilot side of the volume booster. Pilot pressure is adjusted so that desired output pressure is achieved and maintained.

Any mechanical hysteresis of the volume booster is automatically compensated for since it is the actual desired output pressure that is being sensed and fed back to the control circuit.

Command Signal

Command inputs come in a choice of either 0-10Vdc or 4-20mA.

Monitor Signal

The HVC can be ordered with an optional monitor output signal for output to a panel meter or controller for data acquisition or quality assurance needs. The monitor signal represents the internal pressure transducer that is measuring the work pressure.

Providing this monitor signal as part of the pressure control eliminates the need for the customer to purchase a separate transducer since the signal is a true depiction of ownstream pressure.

The HVC's greatest asset is its flexibility. By utilizing shock and vibration resistant technology inside the housing, the HVC can go anywhere. The integral pilot operated regulator allows HVC to operate equally under flow or into static volumes. The internal pressure sensor provides closed loop control that won't change over time.

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Proportion-Air Pressure Control Valves

Proportion-Air, Inc. is the pneumatic industry leader in manufacturing electronic air pressure control valves. Whether you need a high pressure regulator for bottled gasses, a low pressure regulator for inches of water column, a precision pressure regulator for lab or medical grade applications, or even an oxygen regulator cleaned and compatible for oxygen service. Proportion-Air has a family of air pressure regulators right for you.

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