Series 7221 NH3 Ammonia gauges
Standard gauge
specification		 ENFM ammonia gauges are suitable for a medium, which does not clog connection port or corrode stainless steel. These gauges are suitable for NH3 service.
Sizes and weights Case:
Bezel:
Dial:
Pointer:
Window:
Bourdon tube:
Connection:
Movement:
Liquid filling:
Weather protection:
Accuracy:
Case size:
Connection:
Scale:		 Stainless steel aisi 304 with filling plug
Crimped stainless steel aisi 304
White aluminum with blue and red lettering
Black aluminum
Acrylic
Stainless steel 316  'C' shaped
Stainless steel aisi 316 with field removable .012 threaded snubber
Stainless steel
Glycerin
IP 65
2-1-2% of span ASME B40.1 Grade A
2½" ( 63 mm )
1/4" NPT bottom connection
NH3/psi

Pressure range
-30"HG / 0 / 160 psi
-30"HG / 0 / 300 psi

Sizes and weights
Article number
RV232A3N211KZA2
RV232A3N214KZA2
Description
7221 2½" 1/4"NPT -30/160 PSI
7221 2½" 1/4"NPT -30/300 PSI