AB 03 EN

Pressure Gauges with Pressure Compensation ElementApplication
A pressure gauge is an instrument used to measure and indicate the pressure of a medium.
As pneumatic accessories in valve engineering, they are used to measure and indicate the pressure applied to devices,such as positioners or supply pressure regulators.

Special features• Integrated pressure compensation element to prevent condensation• Valve size 40• Various indicating ranges• Version according to–

EN 837-1 · Bourdon tube pressure gauges; dimensions, metrology, requirements and testing–EN 837-2 · Selection and installation recommendations for pressure gauges–EN 837-3 · Diaphragm and capsule pressure gauges;
dimensions, metrology, requirements and testing

Measuring accuracy

Fig. 1: Pressure gauge with outer scale 0 to 6 bar and inner scale
0 to 90 psi

The pressure gauges have the accuracy class 2.5 1) according
to EN 837-1. The permissible reading error over the entire
span must not exceed 2.5 % according to this standard.
Example:The permissible deviation for a pressure gauge scale from 0 to6 bar: 2.5 % x 6 bar = 0.15 bar
As a result, the deviation is ±0.15 bar:Î The actual pressure at a reading of 6 bar on the scale:
6 bar ±0.15 bar: 5.85 to 6.15 bar
Î The actual pressure at a reading of 0.4 bar on the scale:
0.4 bar ±0.15 bar: 0.25 to 0.55 bar1)

The pressure gauges are mere pressure sensing and indicating equipment.
As a result, they are not categorized as measuring equipment. Metrologicalcertification, such as PAC (Pattern Approval Certificate) are, therefore, notavailable.

SAMSON AKTIENGESELLSCHAFT · Weismüllerstraße 3 · 60314 Frankfurt am Main, GermanyPhone: +49 69 4009-0 · Fax: +49 69 4009-1507 · samson@samsongroup.de · www.samsongroup.com

Edition October 2023

General details on pressure gauges! NOTICE
Risk of damage to plants, pressure gauges and othercomponents due to improper use of the pressure gauges.
Only use pressure gauges that are suitable for the operating
conditions and that have been mounted properly.
NoteThe pressure limit identifying mark on the dial applies as theupper pressure limit while testing the pressure of pipelines ortanks.
Operating conditions
Î Observe the selection and installation recommendations
specified in EN 837-2 (formerly DIN 16005, Parts 1 and2) on selecting a pressure gauge suitable for a particularapplication.
Selection criteria
Î Select the pressure gauge according to the following criteria:–

Material compatibility with the process medium, atmosphere and temperature–

Overloading–

Indicating range

Î Make sure that the operating pressure to be expected iswithin the middle third of the indicating range.
Î The type and location of the connecting thread (processfluid connection) must be considered.
Î Observe the regulations that apply for a particular application and the specifications of EN 837-2.

Installation! NOTICE
Risk of malfunction and damage of the pressure gauge due
to incorrect mounting position.
− Mount the pressure gauge with the pressure compensation
element pointing down.
− Protect against direct sunlight.
Additional points that apply concerning the installation ofpressure gauges:
Î Pressure gauges must only be installed by properly trainedstaff.
Î On installing or removing the pressure gauge, do not apply any force to the housing. Therefore, always use a suitable wrench at the wrench face of the connection.
Î By mounting a lock nut at the threaded connection, thepressure gauge dial can be moved to the right position toallow the pressure to be read properly.
Î Make sure that the joints are leak tight.
Î Observe the maximum plant pressure as well as the medium and ambient temperature on selecting suitable seals.
Î The specified steady pressure limit must not be exceeded.
RemovalÎ Take sufficient precautions before removing the pressuregauge.
Î Before removing the pressure gauge from the pipeline, depressurize the relevant plant section. On doing so, beaware that residual medium in the pressure gauge canpose a risk to staff, equipment and the environment.
Start-up and operation
Î Avoid fast changes in temperature as well as pressuresurges.
Î Carefully open the upstream shut-off equipment.
Maintenance and repair
Pressure gauges are maintenance-free.
Repairs by the manufacturer are only permitted.

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AB 03 EN

Table 1: Technical data
Pressure gauges

according toEN 837-1, EN 837-2, EN 837-3

Application

For gases according to ISO 8573-1:
Maximum particle size and density: Class 4, oil content: Class 3
Pressure dew point: Class 3 or at least 10 K below the lowest ambient temperature to be expected.

Accuracy class

2.5

Permissible ambient temperature–40 to +80 °C/–60 to +80 °C 1)

Valve size [mm]40

Degree of protection

IP65

Indicating range(see order numbers)

0 to 6 bar · 0 to 90 psi 3)
0 to 1.2 bar · 0 to 18 psi 3)
0 to 1.6 bar · 0 to 24 psi 3)
0 to 10 bar · 0 to 150 psi 3)
0 to 6 kg/cm² · 0 to 0.6 MPa

Inscription

Without inscription

Process connection

ISO 228/1-G 1/8

Additional electrical equipment

Pressure compensation element

Materials

Standard

Stainless steel

Housing and external parts

1.4404/316L

1.4404/316L

Measuring element

Copper alloy

1.4404/316L

Connecting thread

Nickel-plated brass

1.4404/316L

Glued

WeldedConnection between housing andmeasuring unit
Window and ring

1)
2)
3)

2)

Polycarbonate with EPDM seal

Pointer

Black plastic

Dial

Aluminum (white)

Avoid frequent fluctuations in pressure when used down to –60 °C. The accuracy class may change as a result.
Not free of substances that impair paint adhesion
Conversion in kPa possible.

Dimensions in mm

Pressure compensationelement

Ø4157

Ø327

Center radial threaded connection
ISO 228/1-G1/8 A
SW12/SW14

Bottom radial threaded connection

Ø41Pressurecompensation
element

1043

SW14

Ø3
ISO 228/1-G

1/8

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Table 2: Order numbers, center radial threaded connection
Indicating range

Version

Ordering number

0 to 6 bar
0 to 90 psi

Standard

100071415

Stainless steel

100071411

Standard

100071373

Stainless steel

100071377

Standard

100071428

Stainless steel

100071420

Standard

100071409

Stainless steel

100071410

Standard

100071378

Stainless steel

100195218

0 to 1.2 bar
0 to 18 psi
0 to 1.6 bar
0 to 24 psi
0 to 10 bar
0 to 150 psi
0 to 6 kg/cm²
0 to 0.6 MPa

Table 3: Order numbers, bottom radial threaded connection
VersionIndicating range

Ordering numberStandard

0 to 1.2 bar
0 to 18 psi

Standard
Standard

Suitable for Type
6116

6126

6134

100071367•••

0 to 6 bar
0 to 90 psi

100071369•••

0 to 6 kg/cm²
0 to 0.6 MPa

100071368•••

Table 4: Order numbers, sets of accessories for SAMSON positioners, reversing amplifiers and limit switches

3725

3730/TROVIS 3730

3731

3793/TROVIS 37933766/3767

3768

4763/4765

Suitable for Type …

••

•

•

•

•

•

VersionStandard

Stainless steel

43710

Set of accessories consisting of:Indicating range

Pressure gauges

Accessories

Ordering number

0 to 6 bar
0 to 90 psi

2x 100071415

2x Lock nuts

1402-1637

0 to 6 bar
0 to 90 psi

1x 100071415

1x Lock nut

1402-1636

0 to 10 bar
0 to 150 psi

2x 100071409

2x Lock nuts

1402-1583•

0 to 10 bar
0 to 150 psi

3x 100071409

3x Lock nuts

1402-1528•

0 to 6 kg/cm²
0 to 0.6 MPa

2x 100071378

2x Lock nuts

1402-1613

0 to 6 bar
0 to 90 psi

2x 100071411

2x Lock nuts

1402-1638

0 to 6 bar
0 to 90 psi

1x 100071411

1x Lock nut

1402-1337

0 to 10 bar
0 to 150 psi

2x 100071410

2x Lock nuts

1402-1584•

0 to 10 bar
0 to 150 psi

3x 100071410

3x Lock nuts

1402-1577

•

•

•

•

•

•

•

•

•

•

•

•

AB 03 EN

Table 5: Accessories
Accessories

Material

Ordering number

Lock nut

1.44040250-1949

Seal

NBR

0430-1102

Table 6: Order numbers, sets of accessories for discontinued models and associated successor models
Order number for old sets of accessories (with white pressurecompensation element)

Order number for new sets of accessories (with black pressurecompensation element)

1402-1295

1402-1636

1402-1338

1402-1636

1402-0938

1402-1637

1402-0939

1402-1638

1402-1231

1402-1613

1402-1627

1402-1639

AB 03 EN5

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AB 03 EN

2023-10-16 · English

Specifications subject to change without notice