SIST EN 837-3:1997

Pressure gauges - Part 3: Diaphragm and capsule pressure gauges - Dimensions, metrology, requirements and testing

This European Standard specifies requirements for diaphragm and capsule (designated by D and C respectively, see clause 12) indicating pressure gauges, vacuum gauges and combined vacuum and pressure gauges (compound gauges), from 50 to 250 nominal size with ranges up to 25 bar for the measurement of gauge pressure. A reading of zero bar is atmospheric pressure.

Druckmessgeräte - Teil 3: Druckmessgeräte mit Platten- und Kapselfedern - Masse, Messtechnik, Anforderungen und Prüfung

Diese Europäische Norm legt die Anforderungen für anzeigende Druckmeßgeräte mit Platten- und Kapselfedern (Kurzzeichen D bzw. C, siehe Abschnitt 12) zum Messen von positiven und/oder negativen Überdrücken fest. Sie gilt für Nenngrößen von 50 bis 250 und für Anzeigebereiche bis 25 bar. Der atmosphärische Luftdruck entspricht der Anzeige 0 bar.

Manometres - Partie 3: Manometres a membrane et manometres a capsule - Dimensions, métrologie, prescriptions et essais

La présente norme européenne définit les exigences des manomètres, indicateurs àdiaphragme et capsule (désigné respectivement par D et C, voir article 12), hélicoïde, de dimensions nominales comprises entre 50 et 250 min, utilisées pour la mesure des pressions de tavail supérieures à 25 bars. La pression atmosphérique correspond à une lecture égale à zéro.

Merila tlaka - 3. del: Merila tlaka z membrano in mehovi - Mere, meroslovje, zahteve in preskušanje

General Information

• Status: Published
• Publication Date: 31-Mar-1997
• ICS: 17.100 - Measurement of force, weight and pressure
• Technical Committee: IMIN - Measurement instruments
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Apr-1997
• Due Date: 01-Apr-1997
• Completion Date: 01-Apr-1997
• Ref Project: EN 837-3:1996 - Pressure gauges - Part 3: Diaphragm and capsule pressure gauges - Dimensions, metrology, requirements and testing

Overview - EN 837-3:1996 (CEN)

EN 837-3:1996 is the European standard from CEN that defines dimensions, metrology, requirements and testing for diaphragm and capsule pressure gauges. It covers indicating diaphragm (D) and capsule (C) pressure gauges used as pressure gauges, vacuum gauges and combined vacuum-and-pressure (compound) gauges. The scope includes nominal sizes 50 to 250 and measurement ranges for gauge pressure up to 25 bar. In this standard a reading of zero bar corresponds to atmospheric pressure. (Designations D and C are defined in clause 12.)

Key topics and requirements

• Mechanical dimensions and marking: standardized face sizes and mounting/connection reference to ensure interchangeability and correct installation.
• Metrology and measurement performance: requirements for accuracy, calibration procedures and traceability to ensure reliable pressure indication and acceptable measurement uncertainty.
• Construction and materials: general requirements for diaphragms, capsules and wetted parts to ensure compatibility with measured media and durability under specified ranges.
• Testing and verification: prescribed tests to demonstrate conformity - for example performance checks, pressure cycling/overpressure and functional tests relevant to diaphragm and capsule designs.
• Types of gauges covered: vacuum gauges, gauge-pressure gauges and compound (vacuum + pressure) gauges - specifically those with diaphragm or capsule sensing elements.
• Designation and documentation: identification (D/C), range information and required technical documentation for end-users and regulators.

(Note: EN 837-3 focuses on diaphragm and capsule types; exact test methods and numerical tolerances are specified in the full standard document.)

Applications and who uses EN 837-3

This standard is intended for professionals who design, manufacture, specify, test or maintain pressure-measurement equipment:

• Instrument manufacturers producing diaphragm and capsule gauges
• Calibration and metrology laboratories performing verification and traceable calibration
• Plant and process engineers in industries such as HVAC, petrochemical, pharmaceutical, food processing, laboratories and gas distribution where low-pressure and vacuum measurement is needed
• Procurement and compliance teams who require standardized product specifications for safety and interoperability

EN 837-3 ensures reliable performance of diaphragm and capsule pressure gauges in applications up to 25 bar and across common nominal sizes.

Related standards

• EN 837 series (other parts) covering alternative pressure gauge types and broader selection/installation guidance - consult the EN 837 family for complementary requirements and installation practices.

Keywords: EN 837-3, pressure gauges, diaphragm pressure gauges, capsule pressure gauges, vacuum gauges, compound gauges, metrology, dimensions, testing, CEN.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-1997
Merila tlaka - 3. del: Merila tlaka z membrano in mehovi - Mere, meroslovje, zahteve
in preskušanje
Pressure gauges - Part 3: Diaphragm and capsule pressure gauges - Dimensions,
metrology, requirements and testing
Druckmessgeräte - Teil 3: Druckmessgeräte mit Platten- und Kapselfedern - Masse,
Messtechnik, Anforderungen und Prüfung
Manometres - Partie 3: Manometres a membrane et manometres a capsule -
Dimensions, métrologie, prescriptions et essais
Ta slovenski standard je istoveten z: EN 837-3:1996
ICS:
17.100 Merjenje sile, teže in tlaka Measurement of force,
weight and pressure
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
...