Model 6560 pages

LFG - 8

Product Data
LIQUID FILLED GAUGES – OPEN FRONT STYLE

Model 656 2-1/2" (63mm) and 4" (100mm)
Open Front Stainless Steel Gauges
DESCRIPTION

SPECIFICATIONS

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.

SIZES: 2-1/2" (63mm) and 4" (100mm)

t 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 100mm sizes.

RANGES: 63mm – 30" Hg-0 psi through 0 to 10000 psi
(0 psi to 6000 psi on the lower back mount model)
100mm – 30" Hg-0 psi through 0 psi to 23000 psi
ACCURACY:
Model 6562 (63mm) – ±1.6% of full scale (Grade B)
Model 6566 (100mm) – ±1.0% of full scale (Grade 1A)
BOURDON TUBE: 316L stainless steel
Model 6562 (63mm) – Less than or equal to 800 psi, C type
Bourdon tube; greater than or equal to 1000 psi, helical type
Bourdon tube
Model 6566 (100mm) – Less than or equal to 1000 psi, C type
Bourdon tube; greater than or equal to 1500 psi, helical type
Bourdon tube
WINDOW: 63mm – Polycarbonate (laminated shatter-resistant
glass window optional)
100mm – Laminated shatter-resistant glass window
MOVEMENT: 304 stainless steel

Model 656
with front flange

DIAL: White aluminum with black lettering*
POINTER: 63mm aluminum alloy, black painted; adjustable
pointer on 100mm, aluminum black
CASE AND BEZEL RING: 304 stainless steel, bayonet type
CASE PRESSURE RELIEF:
Top – Rubber disc for 63mm; Back – Rubber disc for 100mm
PROCESS CONNECTION: 316L stainless steel
63mm – 1/4–18 NPT standard
100mm – Lower mount 1/4–18 NPT or 1/2–14 NPT standard;
Lower back mount 1/4–18 NPT standard
WORKING PRESSURE: Steady – 50% of full scale; over range
protection – 125% of full scale
WORKING TEMPERATURE:
Ambient: -40°F to 140°F (-40°C to 60°C)
Fluid: -4°F to 176°F (-20°C to 80°C)

Model 656

WARNING:
Fill fluids can combine with strong oxidizing agents, including
(but not limited to) chlorine, nitric acid, and hydrogen peroxide
and result in an explosion which can cause property damage and
personal injury or bodily harm. If gauges are to be used in such
hazardous service, consult factory for other liquid filling and
product alternatives.

* tSingle scale psi dials are standard, but dials can be changed out at tt
t the factory for kPa/psi, kPa, psi/bar, or bar

In order to correctly use these gauges, it is recommended that
users of pressure gauges become familiar with American National
Standard ASME B40.100-2005 entitled “Pressure Gauges and
Gauge Attachments.” This specification is available from the
American Society of Mechanical Engineers, United Engineering
Center, 345 East 47th Street, New York, NY 10017.

On-line order fax: +1 215-323-9450 or e-mail: usg.sales@ametek.com

Sales/Technical Support: +1 215-293-4100 | 205 Keith Valley Road | Horsham PA 19044 U.S.A.
© 2013, by AMETEK, Inc. All rights reserved.tt
Printed in the U.S.A.tt
PDF513 (160174)
Specifications are subject to change without notice. Visit our Web site for the most up-to-date information.

www.ametekusg.com