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Flow rate under normal operating conditions

flow rate (normal)

Overpressure of the gaseous state of a substance that is in thermodynamic equilibrium with the liquid or solid phase of the substance at a given temperature.

vapor over pressure

total head at the outlet of the plant

plant outlet total head

total head at the inlet of the plant

plant inlet total head

difference between installation outlet and inlet head

total head of installation

Power consumption due to friction in bearings and shaft seals at certain working conditions for the pump

pump power loss (mechanical)

The least flow rate that the pump can deliver continuously without internal damage when operating at design speed and with the pumped material for which it was supplied.

Min permissible flow

lowest flow rate that the pump can deliver continuously without suffering internal damage when operating at the design speed and with the pumped material for which it was supplied

minimum permissible flow rate

minimum flow rate under permissible operating conditions

min permissible flow rate

The greatest flow rate that the pump can deliver continuously without internal damage when operating at design speed and with the pumped material for which it was supplied.

Max permissible flow

highest flow rate that the pump can deliver continuously without suffering internal damage when operating at the design speed and with the pumped material for which it was supplied

Maximum permissible flow rate

largest flow rate under permissible operating conditions

max permissible flow rate

Ratio of conveying power P_u to power demand P under certain working conditions.

eff (pump)

Ratio of the power requirement of the pump reduced by the mechanical power losses to the power requirement of the pump under certain conditions.

efficiency (mechanical)

Ratio of the conveying power to the power used up by the drive

total eff

Ratio of available pump input power P_a and the pump delivery power P_u that comes is surfaced after covering the mechanical power losses, losses due to friction caused by relative motion of internal surfaces and internal leakage losses.

hydraulic eff

minimum available (NPIP) value , which can be given for a given volume flow by an inlet system

np inlet pressure avail

total energy height difference between pump outlet and inlet

Max. delivery head

largest difference between the total energy level on the outlet side of the pump unit and the total energy level on the inlet side of the pump unit at the duty point

max. discharge head

highest total energy level at the outlet side of the pump unit

maximum delivery head

absolute energy level in the inlet cross-section of the pump at the operating point above the level corresponding to the vapor pressure in relation to the NPSH reference level

NSPH nominal value

nominal value of the net positive suction head

nominal value (NSPH)

nominal value of the net positive suction head

nominal value of NPSH

Minimum usable work transferred from the pump to the pumped liquid, based on the weight of the pumped liquid.

min. delivery head

smallest total energy level on the outlet side of the pump set to total energy level on the inlet side of the pump set at the duty point

min. discharge head

lowest total energy level at the outlet side of the pump unit

minimum delivery head

nominal value of usable work transferred from the pump to the pumped liquid, based on the weight of the pumped liquid.

nom delivery head

the difference between the total energy level on the outlet side of the pump unit and the total energy level on the inlet side of the pump unit prevailing at the operating point

nominal head

The head indicates the pressure with which the submersible pump works to transport water over a certain distance.

nominal delivery head

curve of the pump head in dependency of the flow rate

NPSH curve of system

identification number calculated at best efficiency point

type identification number

h(q) curve for pump where the maximum and shut-off head are not coincidental, or the total head doesn't continuously decline as the flow rate increases

stable H(Q) curve of pump

Hoisting height for at no feed flow (Q = 0)

Zero head

Head at flow rate Q = 0

zero head

The head of a pump at zero flow (Q = 0)

null delivery head

power consumption at flow = 0 and guaranteed rotational speed

Power requirement at zero flow

Power consumption at flow rate = 0 and guaranteed speed

zero power requirement

Power requirement of the pump at zero flow rate (Q = 0)

null flow power requirement

maximum mechanical power requirement of the pump under any circumstances

maximum power requirement (pump)

maximum power the pump requires

maximum power requirement of pump

highest value of the mechanical power requirement of the pump at any flow rate, under any permissible working conditions

pump max. power requirement

average velocity given by the stroke length multiplied with the number of full pumping cycles of the piston, plunger or piston attached to the diaphragm per minute (stroke per minute or pump crank speed)

velocity of piston

unswept remaining volume at the end of the discharge

volume of clearance

product of geometrical displacement volume and velocity of rotation or stroke frequency

geometric volume of displacement

Volume of one unit of mass measure of a substance which is needed for a single stroke

Swept volume

agreement about exchanged data and processes between devices

sup prot

Indication whether an declaration of conformity is there

conformity declaration avail

indication about type of unit

unit type

measured difference between the instantaneous value of the pressure and the static pressure

pressure of sound

Integral of the product of the sound pressure p and the component of the particle velocity un, which is perpendicular to a surface at a point of this surface, over this surface

power of sound

Determined ten times the logarithm to the base 10 of the ratio of the sound energy, j, to a reference value, j0, expressed in decibels

sound energy lvl

Determined integral of the sound power p over a specified time interval of duration t (starting at t1 and ending at t2)

energy of sound

highest value of inlet pressure which can be used

maximum permitted pressore at inlet

free cross-sectional area of the inlet opening in the inlet connection

Pump inlet cross-section

pressure on outlet which the relief valve starts to open

relief valve set pressure

outlet pressure of the pump at which the relief valve will close after passing the total pump flow

relief-valve closing pressure

pressure at the relief valve outlet when the valve is closed

back pressure of relief-valve

outlet pressure at which the relief valve will pass all pump flow

over pressure of relief-valve

inlet pressure required for the pump to ensure a sufficient distance between the minimum instantaneous inlet pressure of the pump and the minimum vapor pressure of the pumped material

net positive inlet pressure needed

total pressure at the pump inlet connection without the liquid vapour pressure at the present temperature of the liquid

net positive pressure of the inlet

mean speed of the flow through the valve seat at specified operating conditions

velocity of valve speed

mean spill speed through the opening range of the valve

valve_spill_speed

Ratio of the actual pump delivery flow to the displaced volume per unit of time

volumetrical efficency

Language-independent identification of a class that is unique within a classification system

Electric motor class code

Language-independent, unambiguous code of a class in a class system

codeofclass

Language-independent identification of a class that is unique within a classification system

transmission class code

Name and version of the classification system

Classification system of electric motor

description comprising one or more words allocated to class within class system

descriptionofclass

Name and revision level of the related classification system

system of classification

Name and revision level of the related classification system

transmission classification system

Code of manufacturer explanations or notes for the component or device as text

Code of manufacturer declaration

Conformity assessment document code according to the manufacturer's coding system

Conformity assessment code

defines to which type the customs tariff number is assigned

Type of customs tariff number

describes in which country the customs tariff number is applicable

customs tariff number's country

describes what the customs tariff number is used for

customs tariff number (use)

type of sealing differing in mechanical construction

seal surface on connection A1 (construction)

A group of components with the same design features and construction that can be grouped together for type approval testing and quality conformity checks due to similar manufacturing techniques. They are generally covered by a design specification. Note: In certain cases, components from different design specifications may be considered as belonging to the same type and therefore grouped together for type approval and quality conformity checks

type of electric motor

A group of components with the same design features and construction that can be grouped together for type approval testing and quality conformity checks due to similar manufacturing techniques. They are generally covered by a design specification. Note: In certain cases, components from different design specifications may be considered as belonging to the same type and therefore grouped together for type approval and quality conformity checks.

type of housing

A group of components with the same design features and construction that can be grouped together for type approval testing and quality conformity checks due to similar manufacturing techniques. They are generally covered by a design specification. Note: In certain cases, components from different design specifications may be considered as belonging to the same type and therefore grouped together for type approval and quality conformity checks.

type of coupling

Group of a dynamic seal in terms of mechanical design

Construction of the dynamic seal

type of sealing differing in mechanical construction

seal surface on connection A2 (construction)

A group of components with the same design features and construction that can be grouped together for type approval testing and quality conformity checks due to similar manufacturing techniques. They are generally covered by a design specification. Note: In certain cases, components from different design specifications may be considered as belonging to the same type and therefore grouped together for type approval and quality conformity checks.

type of transm.

A group of components with the same design features and construction that can be grouped together for type approval testing and quality conformity checks due to similar manufacturing techniques. They are generally covered by a design specification. Note: In certain cases, components from different design specifications may be considered as belonging to the same type and therefore grouped together for type approval and quality conformity checks.

type of travel wheel

specific design within a type, generally characterized by its dimensions, a design may include several designs (variants), generally differing in mechanical details

Design of connection (connection A1)

specific design within a type, generally characterized by its dimensions, a design may include several designs (variants), generally differing in mechanical details

Design of connection (connection A2)

type of electric motor differing in mechanical construction

design of electric motor

specific design within a type

des dyn seal

type of static seal differing in mechanical construction

design of static seal housing

type of impeller differing in mechanical construction

design of impeller

grouping of components based on their construction features

type of constr

A group of components with the same design characteristics and structure that can be grouped together for type approval testing and quality conformity checks because of similar manufacturing techniques. They are generally covered by a detail specification. Note: In certain cases, components from different detail specifications can be considered as belonging to the same type and can therefore be grouped together for the purpose of pattern approval and quality conformity checks

Type of connection (connector A1)

Measurement of the component

component size

Components have the same design features and structure. These can be grouped together based on similar manufacturing techniques and quality assurance controls.

type of connection socket A2

Allocation of the devices according to the safety measure

Device explosion protection category, electric motor

Indicates the full marking of explosion protection according to Directive 94/9/EC. NOTE: The 1st line contains marking according to 94/9/EG /z. E.g. CE9999 II 2 G) : - conformity to Directive 94/9/EC, - identification number of the notified body, - which was active in the production control phase, - hexagon symbol as specific identification, - symbol of the device group and -category- serial number and year of manufacture the 2nd line contains identification according to the standards to which the device corresponds (e.g. according to EN 50014 EEx p IIB T4) - Conformity to European standard - Marking Ex for elec. Equipment for potentially explosive areas - type of protection - explosion group - temperature class the 3rd line contains identification according to certification (e.g. AAA ATEX 1237X) - identifier of the notified body - year of issue - issue of the certificate (ATEX) - certificate number - additional identifier X or U

Explosion protection marking of the electric motor

Specification of whether the device is accompanied by a certificate of the explosion-proof version

Explosion protection certificate available

For objects with a preferred position of use, the entire dimension, which is usually based on gravity and (usually) measured perpendicular to the floor surface from the inlet cross-section to that of the pump

inlet height (suction side)

Mass of the object without attachments and operating materials

curb weight

fluid temperature (EN 764) used to determine the calculation temperature of each component

designtemperature

Classification of the devices according to the place of use and the cause of the hazard. NOTE: Group II equipment is further subdivided into explosion groups and temperature classes

Explosion protection device group of the electric motor