PRODUCTS

Our Proportional Valves offer wide range of flow performance for varying projects. Our Proportional Control Valves offer highly accurate, low-hysteresis flow control characteristics. 
We offer two distinct Electronic Precision Pressure Regulators for high and low flow pressure control applications, as well as a Relief Valve for high volume relief flow for precise chamber pressure control.
Our Mass Flow Controllers output precise volumetric or mass flow rates for a variety of gases, from very low flow (10 cc/min) to high flow (300 lpm) rates.
The Precision Pressure Regulator’s unique, dual proportional valve design eliminates bleed to atmosphere, and offers true zero pressure output when deactivated.
The Digital Mass Flow Meter accurately measures and displays mass flow rate, volumetric flow rate, gas temperature, atmospheric pressure and gas pressure, for both Air and Oxygen.
The Pressure Compensating Valve dynamically compensates for varying inlet pressures, while still maintaining consistent, proportional output flow characteristics.
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Proportional Valves

Kelly Pneumatics Proportional Valves offer excellent proportional flow performance using original, patented technology. This design includes one flexing part with virtually no friction giving each valve an exceptionally long life cycle. The smooth, accurate, low hysteresis performance made capable by this design offers significant improvements over traditional solenoid valves. By incorporating this technology into every valve we offer, each performs with incredible accuracy and consistency. Kelly Pneumatics offers a wide variety of proportional valve sizes with varying flow performances to meet many specific requirements.

Max Flow Rate:32 LPM
Max Flow Rate:140 LPM
Max Flow Rate:300 LPM
Max Flow Rate:200 LPM
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Electronic Pressure Regulators

Our Precision Electronic Pressure Regulators offer a dual proportional valve design with PID control circuitry. Using either an externally supplied, dynamic input signal, or an onboard adjustable set-point value, these products provide exceptional closed-loop, proportional, output pressure control characteristics. By utilizing proportional valve technology, each Precision Electronic Pressure Regulator performs with excellent resolution and consistency. The Precision Pressure and Flow Controller product line consists of two categories: pressure regulators and a pressure relief valve.

Max Flow Rate:500 LPM
Output Pressure: -14.5 to 300 PSI
Max Flow Rate:10 LPM
Output Pressure: -14.5 to 300 PSI
Max Flow Rate:500 LPM
Output Pressure: 1 to 300 PSI
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Mass Flow Controllers

Kelly Pneumatics, Inc. offers a proportional valve design Mass Flow Controller for flow applications requiring accurate, linear mass flow control. The unit is calibrated for up to 1% accuracy (full scale) for flow rates of 0-300 LPM. For greater accuracy, the unit can be customized to 2% of reading, for flow rates above 2.5 LPM. This mass flow controller can also adjust for back pressures of up to 100 psig, as well as compensate for changes in gas temperature.

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Precision Pressure Regulators

The Precision Pressure Regulator, is a multi-turn, high accuracy, pressure regulator for air and gases. The Precision Pressure Regulator’s unique, dual proportional valve design eliminates bleed to atmosphere, and offers true zero pressure output when deactivated. Internal proportional valves maintain regulated pressure with varying flow rates, meaning changes in supply pressure do not affect the downstream output pressure.

Output Pressure0 - 150 PSI
Max Flow Rate: 480 LPM
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Digital Mass Flow Meter

The Digital Mass Flow Meter accurately measures and displays mass flow rate, volumetric flow rate, gas temperature, atmospheric pressure and gas pressure, for both Air and Oxygen. The meter has a touch screen interface, offering immediate customization in seconds, such as selecting the preferred units for each specification, including many standard units typical to engineering applications. It can also automatically adjust for typical errors in flow calculation due to back pressures of up to 100 psig.

Max Flow Rate0 - 300 LPM
Accuracy+-2% of Reading, or 0.05 LPM
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Regulated Proportional Valve

This valve dynamically compensates for varying inlet pressures, while still maintaining consistent output flow characteristics. Effective in applications with either fluctuating or oscillating control pressures, the Pressure Compensating Proportional Valve can maintain flow rates with input pressures reaching 250 PSIG.