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Ammonia Refrigerant Gauge

The Series P440 gauge is designed for ammonia refrigeration system and can be applied to handle other chemicals not injurious to the wetted parts. Specifications are: nominal size :2-1/2"(63 mm), 3-1/2"(80 mm), 4"(100 mm); measuring range: 30"Hg Vac -0-150 PSI; and 30"Hg Vac -0-300 PSI; casing: steel black or grey painted; window: engineering plastic one-piece thread-in window; pointer: aluminium, black painted; dial: aluminium, white background, black graduations (Vac in red) and lettering; movement:300 series stainless steel or brass; Bourdon tube: 316 stainless steel, soft soldered; connection: steel or SS, 1/4-", 3/8"NPT/BSPT are standard; temperature range: -20? to 60?C; and operating range: 60% of full scale reading for fluctuation loads, 75% of full scale reading for static loads.