Process Gauges

Model 656 Open Front Stainless Steel Pressure Gauges

DESCRIPTION

The 656 Series are suitable for corrosive environments in chemical, petrochemical,

refining, power, marine, and food and pharmaceutical processing applications.

Liquid filled pressure gauges provide users with a number of advantages in certain

measurement applications. They are ideally suited for uses on equipment where

excessive vibration and pulsation are encountered, such as pumps, compressors,

machine tools, etc. The liquid fill minimizes the effect of these severe environments,

protects the gauge internals, and provides continuous lubrication on the mechanism,

all adding up to extended service life. Liquid filling also provides greater protection of

the gauge internals from corrosive atmospheres.

AMETEK liquid filled gauges can be used with a variety of fill  fluids including glycerin,

mineral oil, and silicone oil. These gauges are available in 63 and 100 mm sizes. Consult

your local distribution or U.S. Gauge for availability.

SPECIFICATIONS

ACCURACY

Model 6562 (63 mm): +1.6% of full scale (Grade B)

Model 6566 (100 mm): +1.0% of full scale (Grade 1A)

PRESSURE RANGE

63 mm: 30 inch Hg to 0 psi through 0 to 10,000 psi (0 to 6000 psi on the LBM model)

100 mm: 30 inch Hg to 0 psi through 0 to 23,000 psi

WORKING PRESSURE

Steady: 50% of full scale

Over Range Protection: 125% of full scale

WORKING TEMPERATURE

Ambient: -40๐F to 140๐F (-40๐C to 60๐C)

Fluid: -4๐F to 176๐F (-20๐C to 80๐C)

FILLING LIQUID: Glycerin, silicone, mineral oil

PRESSURE CONNECTION: 316L stainless steel

BOURDON TUBE: 316L stainless steel

Model 6562 (63 mm):

Less than or equal to 800psi: C type Bourdon tube

Greater than or equal to 1000psi: Helical type Bourdon tube

Model 6566 (100 mm):

Less than or equal to 1000psi: C type Bourdon tube

Greater than or equal to 1500psi: Helical type Bourdon tube

CASE PRESSURE RELIEF

Top: Rubber disc for 63 mm

Back: Rubber disc for 100 mm

CASE AND BEZEL RING: 304 stainless steel; bayonet type

MOVEMENT: 304 stainless steel

WINDOW

63 mm: Polycarbonate (laminated shatter-resistant glass window optional)

100 mm: Laminated shatter-resistant glass window

DIAL: White aluminum with black lettering

POINTER: Aluminum alloy, black painted; contact U.S Gauge for adjustable pointer on 100 mm