Precision Control Devices (PCD)
Marsh Bellofram’s line of regulators started with an idea that changed regulator design for the entire industry.
In 1955, Bellofram Corporation introduced the rolling seal diaphragm design for a line of low-friction cylinders and soon adapted the design to a new line of gas pressure regulators. This new rolling seal diaphragm design produced a gas regulator of unsurpassed precision and repeatability. This design innovation is present in the entire line of Marsh Bellofram regulators, relays, I/P’s and E/P’s.
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Literature Downloads
Catalog-Air Cylinders (652 KB)
Catalog-Servo Pressure Controls (1.4 MB)
