US Gauge 656 Data Sheet

Product Data

LIQUID FILLED GAUGES – OPEN FRONT STYLE

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

8LFG -

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 100mm sizes.

Model 656

with front flange

Model 656

SPECIFICATIONS

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

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

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)

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

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.

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: [phone] or e-mail: [e-mail]

Sales/Technical Support: [phone] | 205 Keith Valley Road | Horsham PA 19044 U.S.A.

© 2013, by AMETEK, Inc. All rights reserved. Printed in the U.S.A. PDF513 (160174)

Specifications are subject to change without notice. Visit our Web site for the most up-to-date information.

www.ametekusg.com

Product Data

FILL PLUG

D

B

M

LIQUID FILLED GAUGES – OPEN FRONT STYLE

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

Pressure Ranges

Ranges**

30" Hg-0

30” Hg-0-15

30” Hg-0-30

30” Hg-0-60

30” Hg-0-100

30” Hg-0-150

0-15 psi

0-30 psi

0-60 psi

0-100 psi

0-160 psi

0-200 psi

0-300 psi

0-400 psi

0-600 psi

0-800 psi

0-1000 psi

0-1500 psi

0-2000 psi

0-3000 psi

0-6000 psi

0-10000 psi

0-14500 psi

0-23000 psi*

* Not available in 63mm

** Metric and dual scale dials are available. Please call Customer Service at

[phone] for more information.

INCHES

(MM)

3-120º

øA

Lower

E

Mount

(Code A)

Center

Back

Mount

(Code F)

63mm

Only

15º

R 1.8 (63mm)

R 2.5 (100mm)

Lower

Back

Mount

Front

Flange

(Code N)

BOLT CIRCLE

DIAMETER

G

Lower

Back

Mount

U-clamp

Front

Flange

(Code T)

63mm

Only

øA

øC

øA

øC

øA

BLOW OUT

DISC

(100mm only)

F

E

D

øB

E

D

F

øB

M

E

D

F

ø

9LFG -

Dimensions

Dial Sizes Mounting Unit A B C D E F G M

63mm

63mm

63mm

63mm

100mm

100mm

© 2013, by AMETEK, Inc. All rights reserved. Printed in the U.S.A. PDF513 (160174)

Specifications are subject to change without notice. Visit our Web site for the most up-to-date information.

LM
LM

CBM
CBM

LBM/FF
LBM/FF

LBM/U-clamp
LBM/U-clamp

LM
LM

LBM/FF
LBM/FF

inches

mm

inches

mm

inches

mm

inches

mm

inches

mm

inches

mm

2.51

63.8

2.51

63.8

2.51

63.8

2.54

64.5

3.99

101.3

3.99

101.4

–
–

2.44

62.0

2.61

66.3

2.64

67.1
–

–

4.06

103.1

–
–

–
–

3.39

86.1

2.99

76.0
–

–

5.16

131.1

1.30

33.0

1.30

33.0

1.30

33.0

1.30

33.0

1.97

50.0

1.97

50.0

2.15

54.6

2.24

56.9

2.24

56.9

2.24

56.9

3.27

83.0

3.27

83.1

On-line order fax: [phone] or e-mail: [e-mail]

Sales/Technical Support: [phone] | 205 Keith Valley Road | Horsham PA 19044 U.S.A.

0.44

11.2
–

–

0.51

13.0

0.51

13.0

0.63

16.0

1.14

29.0

–
–

–
–

2.95

74.9
–

–
–

–

4.57

116.1

–
–

–
–

1.10

27.9

1.10

27.9
–

–

1.77

45.0

www.ametekusg.com

Product Data

LIQUID FILLED GAUGES – OPEN FRONT STYLE

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

Spec Number Selection Chart – 63mm

Model 656 (63mm) Stem Mounting

Model Number 6562 Lower Mount, 1/4-18 NPT 6562 Center Back Mount, 1/4-18 NPT

Bourdon Tube 316L Stainless Steel 316L Stainless Steel

Connection 316L Stainless Steel 316L Stainless Steel

Ranges* Spec No. Spec No.

0-30" Hg VAC 256000 256024

30"-0-15 psi 256001 256025

30"-0-30 psi 256002 256026

30"-0-60 psi 256003 256027

30"-0-100 psi 256004 256028

30"-0-150 psi 256005 256029

0-15 psi 256007 256031

0-30 psi 256008 256032

0-60 psi 256009 256033

0-100 psi 256010 256034

0-160 psi 256011 256035

0-200 psi 256012 256036

0-300 psi 256013 256037

0-400 psi 256014 256038

0-600 psi 256015 256039

0-1000 psi 256016 256040

0-1500 psi 256017 256041

0-2000 psi 256018 256042

0-3000 psi 256019 256043

0-4000 psi 256020 256044

0-5000 psi 256021 256045

0-6000 psi 256022 256046

0-10000 psi 256023 256047

10LFG -

* Metric and dual scale dials are available. Please call Customer Service at [phone] for more information.

On-line order fax: [phone] or e-mail: [e-mail]

Sales/Technical Support: [phone] | 205 Keith Valley Road | Horsham PA 19044 U.S.A.

© 2013, by AMETEK, Inc. All rights reserved. Printed in the U.S.A. PDF513 (160174)

Specifications are subject to change without notice. Visit our Web site for the most up-to-date information.

www.ametekusg.com

Product Data

LIQUID FILLED GAUGES – OPEN FRONT STYLE

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

Spec Number Selection Chart – 63mm

Model 656 (63mm) Front Flange Panel Mounting U-clamp Panel Mounting

Model Number 6562 Lower Back Mount, 1/4-18 NPT 6562 Lower Back Mount, 1/4-18 NPT

Bourdon Tube 316L Stainless Steel 316L Stainless Steel

Connection 316L Stainless Steel 316L Stainless Steel

Ranges* Spec No. Spec No.

0-30" Hg VAC 256048 256072

30"-0-15 psi 256049 256073

30"-0-30 psi 256050 256074

30"-0-60 psi 256051 256075

30"-0-100 psi 256052 256076

30"-0-150 psi 256053 256077

0-15 psi 256055 256079

0-30 psi 256056 256080

0-60 psi 256057 256081

0-100 psi 256058 256082

0-160 psi 256059 256083

0-200 psi 256060 256084

0-300 psi 256061 256085

0-400 psi 256062 256086

0-600 psi 256063 256087

0-1000 psi 256064 256088

0-1500 psi 256065 256089

0-2000 psi 256066 256090

0-3000 psi 256067 256091

0-4000 psi 256068 256092

0-5000 psi 256069 256093

0-6000 psi 256070 256094

0-10000 psi 256071 256095

11LFG -

* Metric and dual scale dials are available. Please call Customer Service at [phone] for more information.

On-line order fax: [phone] or e-mail: [e-mail]

Sales/Technical Support: [phone] | 205 Keith Valley Road | Horsham PA 19044 U.S.A.

© 2013, by AMETEK, Inc. All rights reserved. Printed in the U.S.A. PDF513 (160174)

Specifications are subject to change without notice. Visit our Web site for the most up-to-date information.

www.ametekusg.com

Product Data

LIQUID FILLED GAUGES – OPEN FRONT STYLE

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

Spec Number Selection Chart – 100mm

Model 656 (100mm) Stem Mounting Front Flange Panel Mounting

Model Number 6566 Lower Mount, 1/4-18 NPT 6566 Lower Mount, 1/2-14 NPT 6566 Lower Back Mount, 1/4-18 NPT

Bourdon Tube 316L Stainless Steel 316L Stainless Steel 316L Stainless Steel

Connection 316L Stainless Steel 316L Stainless Steel 316L Stainless Steel

Ranges* Spec No. Spec No. Spec No.

0-30" Hg VAC 356000 356025 356050

30"-0-15 psi 356001 356026 356051

30"-0-30 psi 356002 356027 356052

30"-0-60 psi 356003 356028 356053

30"-0-100 psi 356004 356029 356054

30"-0-150 psi 356005 356030 356055

0-15 psi 356007 356032 356057

0-30 psi 356008 356033 356058

0-60 psi 356009 356034 356059

0-100 psi 356010 356035 356060

0-160 psi 356011 356036 356061

0-200 psi 356012 356037 356062

0-300 psi 356013 356038 356063

0-400 psi 356014 356039 356064

0-600 psi 356015 356040 356065

0-800 psi 356016 356041 356066

0-1000 psi 356017 356042 356067

0-1500 psi 356018 356043 356068

0-2000 psi 356019 356044 356069

0-3000 psi 356020 356045 356070

0-6000 psi 356021 356046 356071

0-10000 psi 356022 356047 356072

0-14500 psi 356023 356048 356073

0-23000 psi 356024 356049 356074

12LFG -

* Metric and dual scale dials are available. Please call Customer Service at [phone] for more information.

On-line order fax: [phone] or e-mail: [e-mail]

Sales/Technical Support: [phone] | 205 Keith Valley Road | Horsham PA 19044 U.S.A.

© 2013, by AMETEK, Inc. All rights reserved. Printed in the U.S.A. PDF513 (160174)

Specifications are subject to change without notice. Visit our Web site for the most up-to-date information.

www.ametekusg.com