Thursday 4 November 2010

Air pressure regulators with 0.1% accuracy

Marsh Bellofram has recently introduced the Type 10 series, a family of high-precision air pressure regulators offering 0.1% output accuracy with very low sensitivity to supply pressure, ambient temperature changes and flow changes, making them ideal for use in pipe and vessel air pressure monitoring, industrial processes, inspection procedures and control and analysis instrumentation applications.

This series offers a highly rugged design with unique features. These include high start-up stability, eliminating the need for regulated start pressure readjustment after long downtimes, with automatic return to output setting at start-up; incorporation of a high-gain pneumatic servo amplifier for regulated pressure, ranging from dead end to 20 cubic meters per hour (12 SCFM), held constant over substantial flow changes;  incorporation of an extra-large capacity integral relief valve, for exhaust flow when regulated pressure is reset to a lower value, with automatic high downstream relief under dead end conditions; and incorporation of a high-performance servo-operated control mechanism in the regulator for added pressure stability.

In addition, excellent temperature stability is achieved via a measurement capsule constructed of specially selected stainless steel alloys which minimize regulated pressure shifts over wide temperature variations.  Inadvertent pressure adjustments are possible via tightening of the Type 10’s integral locking nut. Units may be installed in any position and either panel mounted or supported by in-line plumbing.  Where low power requirements may be of concern, it is also offered in a motorized configuration of 2 rpm/4 watts; 6 rpm/6 watts with extremely high accuracy, allowing it to be used in HVAC systems, remote pressure control ventilation systems or other electro-pneumatic system control applications. Its design allows for easy integration into open or closed loop process control systems and programmable controllers. The Marsh Bellofram Type 10 series is also offered in several model variations to meet particular requirements.  The Type 10EXHR is a high-relief regulator with the same rugged construction and high-accuracy performance as the standard model, with the addition of extra fast “blowdown” for the extremely rapid release of downstream pressure typically required within fast exhaust applications such as cylinder return stroke actuation and air hoists.  A low-range version, the Type 10LR, allows for an output pressure range of 0.5 psig to 25 psig (0.03 BAR to 1.7 BAR) over a maximum supply pressure of 50 psig (3.4 BAR).

The exceptional versatility and performance of models within this high-performance air pressure regulator series also make it ideal for use in gas mixing, air gauging, disc and shoe air braking, positioned signaling, valve operation, gate actuation, calibration stands, cylinder loading, force balance hoists, clamp units, web tensioning, press units and roll loading applications.

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