EN 734:1995

Side channel pumps PN 40 - Nominal duty point, main dimensions, designation system

This European Standard specifies the designations, nominal duty point and main dimensions of heavy duty side channel pumps with a nominal pressure of 40 bar. NOTE: Depending on special circumstances e.g. temperature, materials, sealing ofthe shaft etc., excess operating pressure need not attain the value of the nominal pressure under any circumstances.

Seitenkanalpumpen PN 40 - Nennleistung, Hauptmaße, Bezeichnungssystem

Diese Norm legt die Bezeichnung, die Nennleistung und Hauptmaße für Seitenkanalpumpen für schwere Anforderungen mit Nenndruck PN 40 fest. ANMERKUNG: Bedingt durch besondere Gegebenheiten, z.B. Temperatur, Werkstoff, Wellendichtung, muß der zulässige Betriebsüberdruck nicht in jedem Fall den Nenndruck erreichen.

Pompes à canal latéral PN 40 - Point de fonctionnement nominal, dimensions principales, système de désignation

La présente norme européenne prescrit les désignations, les points nominaux de fonctionnement et les dimensions principales des pompes à canal latéral de service sévère, de pression nominale 40 bar. NOTE: Sous réserve de conditions particulières, et notamment température, matériaux, étanchéité de l'arbre etc., la pression relative de service admissible ne peut en aucun cas atteindre la pression nominale.

Side channel pumps PN 40 - Nominal duty point, main dimensions, designation system

General Information

• Status: Published
• Publication Date: 25-Apr-1995
• Withdrawal Date: 30-Oct-1995
• ICS: 23.080 - Pumps
• Technical Committee: CEN/TC 197 - Pumps
• Drafting Committee: CEN/TC 197 - Pumps
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 20-May-2022
• Completion Date: 11-Feb-2026
• Ref Project: SIST EN 734:2000 - Side channel pumps PN 40 - Nominal duty point, main dimensions, designation system

Overview

EN 734:1995 - Side Channel Pumps PN 40 is a European Standard issued by CEN that defines key requirements for side channel pumps designed for heavy duty applications with a nominal pressure rating of 40 bar (PN 40). This standard specifies the system for designations, nominal duty point, and main dimensions to ensure interoperability and consistent performance. EN 734:1995 aids manufacturers, engineers, and procurement professionals in selecting and installing side channel pumps that meet stringent operational needs - particularly where robust pressure capabilities are essential.

Key Topics

EN 734:1995 addresses several crucial aspects for the specification and use of side channel pumps:

• Nominal Duty Point: Defines the pump's intended operating point under nominal conditions, ensuring reliable performance within the 40 bar pressure class.
• Main Dimensions: Standardizes primary dimensions for side channel pumps, facilitating compatibility, interchangeability, and streamlined installation.
• Designation System: Institutes a unified nomenclature for specifying side channel pumps, allowing users and manufacturers to clearly communicate pump characteristics and ensure correct product selection.
• Pressure Considerations: The standard emphasizes that the maximum operating pressure may, under special circumstances such as extreme temperatures, material selection, or shaft sealing methods, be lower than the nominal pressure.
• Application Flexibility: Highlights the importance of considering the specific operational environment, particularly in cases where process conditions impact allowable pressure or selection criteria.

Applications

Side channel pumps standardized under EN 734:1995 are widely used in industries where robust and reliable pumping solutions are needed to handle challenging fluids under significant pressure. Common applications include:

• Chemical and Petrochemical Plants: For pumping clean or slightly contaminated, low-viscosity liquids under high pressure.
• Boiler Feed Systems: Suitable for delivering feed water to boilers, especially in small-scale and decentralized setups requiring precise flow control.
• Oil and Gas Industry: Used in fuel transfer, refining, and distillation processes where consistent pressure is necessary.
• Process Engineering: Ideal for circulation and dosing systems in industrial installations due to their ability to handle volatile or foaming liquids.

The standard’s emphasis on main dimensions and designation system also streamlines maintenance, integration, and replacement activities, reducing operational downtime and ensuring adherence to safety and performance benchmarks.

Related Standards

Organizations involved in pump selection, design, or supply may find these related standards valuable:

• EN 809 - Pumps and pump units for liquids - Common safety requirements.
• ISO 13709 / API 610 - Centrifugal pumps for petroleum, petrochemical, and natural gas industries.
• EN ISO 5199 - Technical specifications for class II centrifugal pumps.
• EN 22858 / ISO 2858 - End-suction centrifugal pumps - Specification for performance.
• DIN 24260 - Classification for pumps, including side channel pump types.

Adhering to EN 734:1995 promotes operational efficiency, equipment compatibility, and compliance with best practices in the design and use of side channel pumps for industrial and heavy-duty applications. For further guidance, consult with manufacturers and reference relevant product documentation to ensure complete compliance and optimal pump performance.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2000
Side channel pumps PN 40 - Nominal duty point, main dimensions, designation
system
Side channel pumps PN 40 - Nominal duty point, main dimensions, designation system
Seitenkanalpumpen PN 40 - Nennleistung, Hauptmaße, Bezeichnungssystem
Pompes a canal latéral PN 40 - Point de fonctionnement nominal, dimensions
principales, systeme de désignation
Ta slovenski standard je istoveten z: EN 734:1995
ICS:
23.080 ýUSDONH Pumps
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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