Ashcroft 91554XLL Pressure Gauge 4.5 in 0-5000 Psi Rear Flange

Product Description

The ASHCROFT 91554XLL is a process industrial pressure gauge designed for demanding fluid and gas monitoring applications. It features a 4.5-inch analog dial with a 0 to 5000 psi range and an accuracy of 0.5% of scale, making it well-suited for high-pressure industrial systems. The aluminum case houses stainless steel wetted parts, providing corrosion resistance in process environments where media contact is a concern. Connection is via a 1/2-inch MNPT rear-entry fitting, and the rear flange mount allows for direct panel or wall installation. Licensed plumbers, pipefitters, and industrial instrumentation technicians are the primary installers of this gauge.

This gauge is intended for process and industrial applications where reliable pressure indication at elevated ranges is required. Its no-fill, dry design suits environments where liquid-filled gauges are not appropriate or preferred. The NEMA 4X and IP66 ratings make it suitable for outdoor installations or areas subject to washdown and moisture exposure. The glass lens and analog dial provide clear local indication without the need for external power or signal conditioning.

Key Features

• 4.5-inch analog dial with 0 to 5000 psi range for high-pressure process monitoring
• 0.5% of scale accuracy for reliable process indication
• Stainless steel wetted parts resist corrosion from aggressive media
• Aluminum case keeps weight manageable while providing structural durability
• Rear flange mount with 1/2-inch MNPT connection for direct panel installation
• IP66 and NEMA 4X rated for outdoor and washdown environments
• No-fill dry gauge design eliminates concerns about liquid filler contamination

Compatibility

Designed as an OEM-style process gauge for industrial piping systems, pressure vessels, and fluid handling equipment requiring a 1/2-inch MNPT rear-mount connection and a 4.5-inch dial format.

Installation Notes

Installation should be performed by a qualified pipefitter or instrumentation technician. Isolate and depressurize the system completely before removing any existing gauge or fitting. Apply thread sealant appropriate for the process media to the MNPT threads, and do not overtighten, as this can crack the gauge socket. Verify gauge range is appropriate for the system's expected operating and surge pressures before placing into service.