EN 12756:2000

Mechanical seals - Principal dimensions, designation and material codes

This European Standard defines the principal dimensions for the internal installation of single and multiple mechanical seals with (rotating) spring units into the pump sealing cavity according to ISO 3069 as minimum cavity dimensions as typical for centrifugal pumps in accordance with EN 22858 and EN 733. It also gives the seal designations and material codes to be used.

Gleitringdichtungen - Hauptmaße, Bezeichnung und Werkstoffschlüssel

Diese Europäische Norm enthält die Hauptmaße für den Einbau von innenliegenden Einzel und Mehrfach-Gleitringdichtungen mit umlaufendem Federteilin den Wellendichtungsraum nach ISO 3069 als Mindest-Einbauraumabmessungen, wie diese typisch für Kreiselpumpen nach EN 22858 und EN 733 sind, und legt deren Bezeichnung und Werkstoffschlüssel fest.

Garnitures mécaniques d'étanchéité - Dimensions principales, désignation et codes matériaux

Cette norme européenne définit les dimensions principales de montage des garnitures mécaniques simples et doubles à bague élastique tournante dans des logements de pompes conformes à l'ISO 3069, de dimensions minimales caractéristiques pour pompes centrifuges du type indiqué dans les EN    22858 et EN 733. Elle donne également les désignations des garnitures d'étanchéité et les codes matériaux à utiliser.

Mechanical seals - Principal dimensions, designation and material codes

General Information

• Status: Published
• Publication Date: 12-Dec-2000
• Withdrawal Date: 01-Jul-2001
• ICS: 21.140 - Seals, glands
• Technical Committee: CEN/TC 197 - Pumps
• Drafting Committee: CEN/TC 197 - Pumps
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 25-Jan-2011
• Completion Date: 25-Jan-2011
• Ref Project: SIST EN 12756:2001 - Mechanical seals - Principal dimensions, designation and material codes

Overview

EN 12756:2000 is a European Standard developed by CEN that specifies the principal dimensions, designation system, and material codes for mechanical seals used in pump applications. The standard focuses on defining internal installation dimensions for single and multiple mechanical seals equipped with rotating spring units. It establishes minimum cavity dimensions based on ISO 3069, applicable primarily to centrifugal pumps compliant with EN 22858 and EN 733 standards. This harmonized approach ensures compatibility and interchangeability of mechanical seals across various pump designs.

Key Topics

• Principal Dimensions
  EN 12756:2000 defines the critical dimensions necessary for fitting mechanical seals into pump sealing cavities. This includes diameters, lengths, and other size parameters essential for proper installation and functionality.

• Seal Designation
  The standard introduces a clear and consistent system for designating mechanical seals. This standardized nomenclature helps manufacturers, suppliers, and users accurately identify and specify seal types for diverse applications.

• Material Codes
  To ensure optimal performance and durability, EN 12756:2000 specifies standardized material codes for seal components. These codes assist in selecting appropriate materials tailored to different operating conditions such as temperature, pressure, and fluid compatibility.

• Compatibility with ISO 3069 and EN Pump Standards
  The standard aligns the seal dimensions with ISO 3069 cavity dimensions and ensures compatibility with centrifugal pump standards EN 22858 and EN 733, facilitating a unified mechanical seal system across European industries.

Applications

EN 12756:2000 is especially relevant for:

• Centrifugal Pumps
  Mechanical seals manufactured according to this standard are designed primarily for centrifugal pumps, widely used in industries like water treatment, chemical processing, and oil & gas.

• Pump Manufacturing and Maintenance
  Manufacturers can design mechanical seals and pump sealing cavities that conform to EN 12756:2000, ensuring seamless installation and replacement. Maintenance teams benefit from standardized dimensions and material codes for easier seal servicing and procurement.

• Seal Suppliers and Distributors
  The standardized designation system simplifies ordering and inventory management, reducing errors and enhancing supply chain efficiency.

• Industrial Equipment Design
  Equipment designers can incorporate mechanical seals that meet EN 12756:2000, guaranteeing reliability and standardization, which supports backward compatibility and future upgrades.

Related Standards

• ISO 3069
  Defines minimum cavity dimensions for mechanical seals, serving as the basis for EN 12756:2000 dimensional requirements.

• EN 22858
  Pertains to centrifugal pump specifications, ensuring pump sealing cavities are compatible with the mechanical seals defined in EN 12756.

• EN 733
  Another standard for centrifugal pumps which works in conjunction with EN 12756 to standardize seal installation dimensions.

• Other Mechanical Seal Standards
  For comprehensive mechanical seal specifications, refer to additional standards addressing seal testing, performance, and specific application requirements.

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Keywords: EN 12756:2000, mechanical seals, principal dimensions, seal designation, material codes, centrifugal pumps, pump sealing cavity, ISO 3069, EN 22858, EN 733, seal installation, pump maintenance, European Standard, CEN

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Mechanical seals - Principal dimensions, designation and material codesGleitringdichtungen - Hauptmaße, Bezeichnung und WerkstoffschlüsselGarnitures mécaniques d'étanchéité - Dimensions principales, désignation et codes matériauxMechanical seals - Principal dimensions, designation and material codes21.140T
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