Ashcroft 83222 Pressure Gauge 0-150 Psi 3.5 in Dial Npt

Product Description

The ASHCROFT 83222 is an industrial analog pressure gauge designed for accurate pressure monitoring in mechanical, HVAC, plumbing, and process piping systems. It features a 3.5-inch dial with a 0 to 150 psi range and delivers 1 percent of scale accuracy. The gauge uses a 316 stainless steel Bourdon tube and is housed in a 304/316 stainless steel case with a polycarbonate lens. The lower-mount, 1/4-inch NPT connection makes it straightforward to thread into standard fittings. It is a dry (non-liquid-filled) gauge suited for installations where vibration dampening is not required. Licensed HVAC technicians, plumbers, and pipefitters are the typical installers for this type of instrument.

This gauge is appropriate for residential and light commercial applications where a reliable, readable pressure indication is needed on water, air, gas, or hydronic piping. Common install locations include boiler supply lines, compressed air systems, chiller circuits, and water service entry points. The 3.5-inch dial provides good readability in tight mechanical rooms. The stainless steel construction supports use in mildly corrosive or washdown environments, and the IP54 and IP65/NEMA 4 ratings confirm resistance to dust and water ingress.

Key Features

• 0 to 150 psi analog pressure range with vacuum capability down to -30 inches Hg
• 1 percent of full-scale accuracy for reliable pressure readings
• 316 stainless steel Bourdon tube for corrosion resistance in wet or mildly aggressive media
• 304/316 stainless steel case with polycarbonate lens — rated IP54 and IP65/NEMA 4
• 1/4-inch lower-mount NPT connection fits standard pipe fittings without adapters
• Dry gauge construction — no fill fluid to contain or replace
• Meets CRN, PED, and RoHS standards; Series 1009

Compatibility

Designed as an OEM-style replacement or new-installation pressure gauge for industrial, HVAC, and plumbing systems requiring a 1/4-inch NPT lower-mount connection and a 0 to 150 psi range.

Installation Notes

Installation should be performed by a licensed plumber, pipefitter, or HVAC technician in accordance with applicable local codes and ASME B40.100 gauge installation guidelines. Depressurize and isolate the system before threading in or removing the gauge. Apply thread sealant or PTFE tape to the NPT threads — do not overtighten, as this can crack the socket or distort the Bourdon tube connection. For systems subject to pressure spikes or pulsation, consider adding a snubber fitting to protect gauge internals.