EN 733:1995
(Main)End-suction centrifugal pumps, rating with 10 bar with bearing bracket - Nominal duty point, main dimensions, designation system
End-suction centrifugal pumps, rating with 10 bar with bearing bracket - Nominal duty point, main dimensions, designation system
This European Standard specifies the designations, nominal duty points and main dimensions of end-suction centrifugal pumps rated at 10 bar. NOTE: Depending on special circumstances, e.g. temperature, materials, sealing of the shafts etc., excess operating pressure need not attain the value of the nominal pressure under any circumstances.
Kreiselpumpen mit axialem Eintritt PN 10 mit Lagerträger - Nennleistung, Hauptmaße, Bezeichnungssystem
Diese Europäische Norm legt Bezeichnungen, Nennleistungen und Hauptmaße für Kreiselpumpen mit axialem Eintritt mit Nenndruck von PN 10 bar fest. Bedingt durch besondere Gegebenheiten, z.B. Temperatur, Werkstoff, Wellendichtung usw. braucht der zulässige Betriebsüberdruck nicht in jedem Fall den Nenndruck erreichen.
Pompes centrifuges à aspiration axiale PN 10 à support sous corps de pompe - Point de fonctionnement nominal, dimensions principales, système de désignation
La présente norme européennes prescrit les désignations, les points nominaux de fonctionnement et les dimensions principales des pompes centrifuges à aspirationaxiale, de pression nominale 10 bar. 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.
End-suction centrifugal pumps, rating with 10 bar with bearing bracket - Nominal duty point, main dimensions, designation system
General Information
- Status
- Published
- Publication Date
- 25-Apr-1995
- Withdrawal Date
- 30-Oct-1995
- Technical Committee
- CEN/TC 197 - Pumps
- Drafting Committee
- CEN/TC 197 - Pumps
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 07-Jun-2022
- Completion Date
- 14-Apr-2025
Overview
EN 733:1995 (published by CEN) is the European standard that defines the designation system, nominal duty points, and main dimensions for end-suction centrifugal pumps rated at 10 bar (PN 10) with a bearing bracket. The standard establishes common terms and dimensional references to improve interchangeability, selection and specification of pumps across industry. Note: depending on special circumstances (temperature, materials, shaft sealing, etc.), the actual allowable operating pressure may be lower than the nominal 10 bar.
Key topics and requirements
- Designation system - standardized naming and type coding to ensure consistent identification of pump families and sizes.
- Nominal duty point - defined reference operating point (flow and head) used for rating and selection of PN 10 end-suction pumps.
- Main dimensions - dimensional data for pump components and mounting interfaces (suction/discharge flanges, centreline height, shaft and bearing bracket geometry) to support mechanical interchangeability.
- Bearing bracket configuration - requirements for pumps supplied with a bearing bracket to ensure consistent alignment and mounting.
- Pressure rating (PN 10) - classification for pumps designed for a nominal pressure of 10 bar; the standard clarifies limits and applicability.
- Application caveat - explicit note that special conditions (temperature, materials, seals) can affect achievable operating pressure and must be considered during selection.
Practical applications
EN 733 is used to specify and select standardized end-suction centrifugal pumps (PN 10) for:
- Building services (heating, ventilation, air conditioning)
- Water supply and booster systems
- General industrial process pumping
- Irrigation and municipal water works
- Replacement and spare-part matching for legacy equipment
Benefits include easier procurement, reduced design complexity, and improved compatibility between manufacturers.
Who uses this standard
- Pump manufacturers and designers producing PN 10 end-suction pumps with bearing brackets
- Mechanical and plant engineers specifying pumps for systems and projects
- Procurement and asset managers seeking interoperable replacement pumps
- Test houses and certification bodies referencing dimensional and duty-point conventions
- Maintenance teams verifying spare-part compatibility
Related standards
Related documents typically cover pump testing, materials, flange standards, mechanical seals and installation/commissioning guidance. When specifying pumps to EN 733, consult complementary standards for performance testing, materials of construction and site installation to ensure complete compliance.
Keywords: EN 733:1995, end-suction centrifugal pumps, PN 10, nominal duty point, pump dimensions, bearing bracket, designation system, European Standard.
Frequently Asked Questions
EN 733:1995 is a standard published by the European Committee for Standardization (CEN). Its full title is "End-suction centrifugal pumps, rating with 10 bar with bearing bracket - Nominal duty point, main dimensions, designation system". This standard covers: This European Standard specifies the designations, nominal duty points and main dimensions of end-suction centrifugal pumps rated at 10 bar. NOTE: Depending on special circumstances, e.g. temperature, materials, sealing of the shafts etc., excess operating pressure need not attain the value of the nominal pressure under any circumstances.
This European Standard specifies the designations, nominal duty points and main dimensions of end-suction centrifugal pumps rated at 10 bar. NOTE: Depending on special circumstances, e.g. temperature, materials, sealing of the shafts etc., excess operating pressure need not attain the value of the nominal pressure under any circumstances.
EN 733:1995 is classified under the following ICS (International Classification for Standards) categories: 23.080 - Pumps. The ICS classification helps identify the subject area and facilitates finding related standards.
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Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2000
End-suction centrifugal pumps, rating with 10 bar with bearing bracket - Nominal
duty point, main dimensions, designation system
End-suction centrifugal pumps, rating with 10 bar with bearing bracket - Nominal duty
point, main dimensions, designation system
Kreiselpumpen mit axialem Eintritt PN 10 mit Lagerträger - Nennleistung, Hauptmaße,
Bezeichnungssystem
Pompes centrifuges a aspiration axiale PN 10 a support sous corps de pompe - Point de
fonctionnement nominal, dimensions principales, systeme de désignation
Ta slovenski standard je istoveten z: EN 733:1995
ICS:
23.080 ýUSDONH Pumps
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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