Model-A-396A

Supported Applications

The Dwyer Model A-396A is a hand-operated calibration pump designed to generate precise pressure for calibrating manometers, other pressure standards, gauges, and transmitters. It also serves as a source for setting pressure switches.

Operating Conditions & Performance

The series generates pressures ranging from a fraction of an in w.c. to 72 psig (5 bar). The working pressure is rated at 72 psi (5 bar), with temperature limits specified as -20 to 120°F (-29 to 49°C).

Physical characteristics include overall dimensions of 7-7/8" (20 cm) length and a diameter of 1-3/8" (3.5 cm). The unit weighs 14 oz (400 g). Displaced volume is approximately 1.2 in³ (20 cm³) with a 3/64" (1 mm) thread revolution.

Configuration Options

The Model A-396A includes specific features and accessories to support pressure generation and control:

• Fine Adjustment: Equipped with a volume adjuster for fine pressure control and a vernier knob.
• Bleed Valve: Included for controlled pressure release.
• Connections & Tubing: Features an output connection of 1/8" NPT(F). The kit includes a barbed fitting, tee connector, and three 36" lengths of vinyl tubing.

For pressures above 40 psi, the series supports use with a 1/8" NPT (M) compression fitting and appropriately sized rigid tubing in place of the standard barbed fitting and flexible tubing. To maintain pressure integrity, Teflon® tape is recommended for sealing pipe threads.

Key Product Differences

The Model A-396A represents a single configuration within this series code. The data sheet identifies it specifically as the "Calibration pump" model in the product chart. No alternative housings, output types, or sensor elements are documented for this specific series entry.