2.5" Black steel refrigeration pressure gauges

Dial

2.5” (63mm), 4” (100mm), 6” (150mm): White aluminum
2.5” (63mm) liquid filled: Multicolored dial

Case

2.5” (63mm): Plastic, colour coded, blue for low pressure and red for high pressure
4” (100mm), 6” (150mm): Steel painted black

Lens

Polycarbonate lens

Ring

2.5” (63mm) liquid filled SS, crimped
4” (100mm): Brass, polished
6” (150mm): Steel, painted black

Connection

1/8” NPT or 1/4” NPT standard

Restrictor Screw

Standard

Bourdon Tube

2.5” (63mm): Phosphor bronze, 4” (100mm), 6” (150mm): Phosphor bronze

Pointer

Aluminum, anodized black, 2.5” (63mm) liquid filled: Red aluminum,

Over-Pressure Limit

25% of full scale value

Scale

psi/F (R-12/R-22/R-502)

Working Pressure

Maximum 75% of full scale value

Ambient/Process Temperature

2.5” (63mm), 4” (100mm), 6” (150mm): -40°F to 158°F (-40°C to 70°C)
2.5” (63mm) liquid filled: -13°F to 140°F (-25°C to 60°C)

Accuracy

2.5” (63mm): ±2% of full scale
4” (100mm), 6” (150mm): ±1% ANSI/ASME Grade 1A

Enclosure Rating

Dry: IP52
Liquid Filled: IP65