Ashcroft 96221 Pressure Gauge 0-400 Psi 4.5 in Rear Flange

Product Description

The ASHCROFT 96221 is a process industrial pressure gauge designed for demanding fluid and gas system monitoring applications. It features a 4.5-inch analog dial with a measurement range of 0 to 400 psi and delivers 0.5% of scale accuracy. The thermoplastic case provides resistance to corrosive environments, and the glass lens protects the dial face. Connection is made via a 0.25-inch MNPT rear entry fitting, with a rear flange mount configuration for panel or bulkhead installation. Licensed plumbers, HVAC technicians, and industrial piping mechanics commonly specify this gauge for process lines where accurate pressure readings and robust housing are required.

This gauge is suited for process and industrial piping systems in both commercial and industrial settings. The rear flange mount design allows it to be recessed into panels or mounted flush to pipe supports, keeping the dial face visible and accessible. The no-fill, non-liquid-filled construction makes it appropriate for applications where fluid dampening is not required or where process fluid compatibility with oil fill would be a concern. Typical installation scenarios include hydraulic lines, compressed air systems, water distribution panels, and chemical process equipment where a durable, panel-mounted pressure indicator is needed.

Key Features

• 4.5-inch analog dial with 0 to 400 psi range for clear, wide-view pressure reading
• 0.5% of scale accuracy for reliable process monitoring
• Thermoplastic case rated to IP66 and NEMA 4X for washdown and corrosive environments
• Rear flange mount configuration for panel or bulkhead installations
• 0.25-inch MNPT rear entry connection for direct pipe or manifold mounting
• No-fill design eliminates liquid compatibility concerns
• CRN certified for use in Canadian pressure vessel and piping applications

Compatibility

Designed as an OEM-style replacement or direct-install process pressure gauge for industrial and commercial piping systems requiring a 4.5-inch rear flange mount gauge with 0.25-inch MNPT connection and a 0 to 400 psi range.

Installation Notes

Installation should be performed by a licensed plumber or qualified industrial piping mechanic in accordance with applicable local codes and ASME B40.100 pressure gauge standards. Depressurize and isolate the system completely before removing any existing gauge or installing this unit. Apply thread sealant to the MNPT fitting per manufacturer and code requirements, and do not over-torque the connection. Verify that the process fluid, pressure range, and environmental conditions are compatible with the gauge specifications before commissioning.