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ČSN EN ISO 17769-1 - minimum allowable continuous speed, nmin,ad
ČSN EN ISO 17769-1 - Kapalinová čerpadla a čerpací zařízení - Obecné termíny, definice, veličiny, písemné značky a jednotky - Část 1: Kapalinová čerpadla
| Stáhnout normu: | ČSN EN ISO 17769-1 (Zobrazit podrobnosti) Zákazníci, kteří mají na svém počítači sjednanou od České agentury pro standardizaci (ČAS) službu ČSN on-line pro elektronický přístup do plných textů norem v pdf (verzi pro firmy nebo pro jednotlivce), mohou zde přímo otevírat citované ČSN. |
| Datum vydání/vložení: | 2013-08-01 |
| Zdroj: | https://www.iso.org/obp/ui/#iso:std:iso:17769:-1:ed-1:v1:en |
| Třidící znak: | 110001 |
| Obor: | Čerpadla, všeobecně |
| ICS: |
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| Stav: | Platná |
- 2.1.1.1 pump
- 2.1.1.2 pump unit
- 2.1.1.3 installation
- 2.1.1.4 system
- 2.1.1.5 conditions
- 2.1.2.1 design
- 2.1.2.2 rated
- 2.1.2.2.1 rated conditions
- 2.1.2.3 operating
- 2.1.2.3.1 operating conditions
- 2.1.2.4 pressure or temperature rating
- 2.1.2.5 normal
- 2.1.2.6 allowable
- 2.1.2.7.1 working
- 2.1.2.7.2 allowable working alternative
- 2.1.2.8 test
- 2.1.2.9 nominal
- 2.1.3.1 mass rate of flow, q
- 2.1.3.2 rate of flow volume rate of flow, flow rate, Q
- 2.1.3.2.1 optimum rate of flow, Qopt
- 2.1.3.2.2 rated flow, Qr
- 2.1.3.2.3 normal flow, Qn
- 2.1.3.2.4 maximum flow, Qmax
- 2.1.3.2.5 minimum flow, Qmin
- 2.1.3.2.6 maximum allowable flow, Qmax,ad
- 2.1.3.2.7 minimum allowable flow, Qmin, ad
- 2.1.3.2.7.1 minimum allowable stable flow, Qmin, ad, st
- 2.1.3.2.7.2 minimum allowable thermal flow, Qmin,ad, therm
- 2.1.3.3 balancing rate of flow, QB
- 2.1.3.4 leakage rate of flow, QL
- 2.1.3.5 inlet rate of flow, Q1
- 2.1.3.6 outlet rate of flow, Q2
- 2.1.3.7 intermediate take-off rate of flow, Q3, 4…
- 2.1.4.1 reference plane
- 2.1.4.2 height, z
- 2.1.4.3 height of the inlet connection, z1
- 2.1.4.4 height of the outlet connection, z2
- 2.1.4.5 height of the inlet-side measuring point, z1’
- 2.1.4.6 height of the outlet-side measuring point, z2’
- 2.1.4.7 height of the inlet side of the installation, zA1
- 2.1.4.8 height of the outlet side of the installation, zA2
- 2.1.4.9 height of the inlet manometer, z1M
- 2.1.4.10 height of the outlet manometer, z2M
- 2.1.4.11 level difference, zy-x = zy – zx
- 2.1.5.1 head, H
- 2.1.5.1.1 pressure head, HM,x
- 2.1.5.1.2 velocity head, HU
- 2.1.5.1.3 total head, Ht,x
- 2.1.5.1.3.1 installation total head, Ht,A2–1
- 2.1.5.1.3.2 pump total head
- 2.1.5.1.3.3 pump unit total head, Ht,gr2–1
- 2.1.5.2 static head, Hstat
- 2.1.5.3 loss of head, HJx–x
- 2.1.5.4 height of the NPSH datum plane, zD
- 2.1.5.5 net positive suction head, NPSH
- 2.1.5.5.1 net positive suction head available, NPSHA
- 2.1.5.5.2 net positive suction head required, NPSHR
- 2.1.5.5.3 net positive suction head required for a drop of 3%, NPSH3
- 2.1.6 specific energy, e
- 2.1.7.1 inlet area of the pump, A1
- 2.1.7.2 outlet area of the pump, A2
- 2.1.7.3 inlet area of the installation, AA1
- 2.1.7.4 outlet area of the installation, AA2
- 2.1.8.1 mean velocity at point x, Ux
- 2.1.8.2 mean velocity at inlet, U1
- 2.1.8.3 mean velocity at outlet, U2
- 2.1.8.4 mean velocity at inlet area of the installation, UA1
- 2.1.8.5 mean velocity at outlet area of the installation, UA2
- 2.1.8.6 local velocity, Ux
- 2.1.9.1 pressure at point x, px
- 2.1.9.2 atmospheric pressure, pamb
- 2.1.9.3 vapour pressure of the pumped liquid, pv
- 2.1.9.4 inlet pressure of the pump, p1
- 2.1.9.4.1 maximum allowable inlet pressure, p1,max,ad
- 2.1.9.4.2 maximum inlet pressure, p1,max,op
- 2.1.9.4.3 rated inlet pressure, p1,r
- 2.1.9.5 outlet pressure of the pump, p2
- 2.1.9.5.1 maximum outlet pressure, p2,max
- 2.1.9.5.2 rated outlet pressure, p2,r
- 2.1.9.6.1 differential pressure
- 2.1.9.6.2 rated differential pressure, p1–2,r
- 2.1.9.7 gauge pressure at point, px,man
- 2.1.9.8 inlet pressure of the installation, pA1
- 2.1.9.9 outlet pressure of the installation, pA2
- 2.1.9.10 maximum allowable working pressure, pmax,ad
- 2.1.9.11 maximum allowable casing working pressure, pmax,ad.C
- 2.1.9.12 maximum dynamic sealing pressure, pS,max,op
- 2.1.9.13 maximum static sealing pressure, pS,max,stat
- 2.1.9.14 hydrostatic test pressure, ptest
- 2.1.9.15 basic design pressure, pb
- 2.1.9.16 velocity pressure, pu
- 2.1.10.1 maximum allowable temperature, θmax,ad
- 2.1.10.2 allowable temperature range of the pump
- 2.1.11.1 pump power output, Pu
- 2.1.11.2 pump power input, P
- 2.1.11.2.1 pump rated power input, Pr
- 2.1.11.3 driver power input, Pmot
- 2.1.11.4 driver rated power output, Pmot,u,r
- 2.1.11.5 pump mechanical power losses, PJ,ab
- 2.1.12.1 pump efficiency, η
- 2.1.12.1.1 pump best efficiency, ηmax, ηopt, ηBEP
- 2.1.12.2 mechanical efficiency, ηm
- 2.1.12.3 hydraulic efficiency, ηh
- 2.1.12.4 motor efficiency, ηmot
- 2.1.12.5 overall efficiency, ηgr
- 2.1.13.1 duty point
- 2.1.13.2 guarantee point
- 2.1.13.3 allowable operating range
- 2.1.13.4 pump power input curve
- 2.1.13.5 pump efficiency curve
- 2.1.13.6 pump NPSH curve
- 2.1.13.7 installation NPSH curve
- 2.1.14.1 speed, n
- 2.1.14.2 maximum allowable continuous speed, nmax,ad
- 2.1.14.3 minimum allowable continuous speed, nmin,ad
- 2.1.14.4 rated speed
- 2.1.14.5 trip speed, ntrip
- 2.1.14.6 clockwise rotation, CW
- 2.1.14.7 counter-clockwise rotation, CCW
- 2.1.15.1 connection loads
- 2.1.15.2 force, FX, FY, FZ, FR
- 2.1.15.3 moment, MX, MY, MZ, MR (2.1.15.3)
- 2.1.15.4 axial load of pump rotor, Fax
- 2.1.15.4.1 design axial load, Fax,d
- 2.1.15.4.2 maximum axial load, Fax,max
- 2.1.15.5 radial load of pump rotor, Frad
- 2.1.15.5.1 design radial load, Frad,d
- 2.1.15.5.2 maximum radial load, Frad,max
- 2.1.15.6 shaft deflection
- 2.1.16.1 density, p
- 2.1.16.2 kinematic viscosity, u
- 2.1.16.3 dynamic viscosity, μ
- 2.1.16.4 mixture
- 2.1.16.5 gas content
- 2.1.16.6 solid content
- 2.1.16.7 multi-phase
- 2.1.17.1 pump liquid
- 2.1.17.2 liquid pump
- 2.1.17.3 parallel operation
- 2.1.17.4 series operation
- 2.1.17.5 corrosion allowance
- 2.1.17.6 axial split
- 2.1.17.7 radial split
- 2.1.17.8 shaft runout
- 2.1.17.9 shaft stiffness
- 2.1.17.10 face runout
- 2.1.17.11 seal flush circulation
- 2.1.17.12 injection flush
- 2.1.17.13 barrier liquid
- 2.1.17.14 buffer liquid
- 2.1.17.15 quenching
- 2.1.17.16 throttle bush
- 2.1.17.17 auxiliary connections
- 2.1.17.18 canned motor pump, canned rotor
- 2.1.17.19 hydrodynamic bearing
- 2.1.17.19.1 hydrodynamic radial bearing
- 2.1.17.19.2 hydrodynamic thrust bearing
- 2.1.17.20 product lubrication
- 2.1.17.21 submersible pump
- 2.1.17.22 submergible pump
- 2.1.17.23 pump driver, driver
- 2.1.17.24 coupling
- 2.1.17.24.1 coupling service factor
- 2.1.17.25 part
- 2.1.17.26 sub-assembly
- 2.1.17.27 component
- 2.1.17.28 standby service
- 2.1.17.29 standby pump
- 2.1.17.30 pressure casing
- 2.2.1.1 minimum continuous stable flow, Qst,min
- 2.2.1.2 minimum continuous thermal flow, Qtherm,min
- 2.2.1.3 allowable operating range
- 2.2.2.1 NPSH datum plane
- 2.2.3.1 optimum pump power input, Popt
- 2.2.3.2 shut-off pump power input, P0
- 2.2.3.3 maximum pump power input, Pmax
- 2.2.4.1 optimum head, Hopt
- 2.2.4.2 shut-off head, H0
- 2.2.4.3 head at peak point, Hp
- 2.2.4.4 maximum head, Hmax
- 2.2.4.5 net positive suction head 3 %, NPSH3
- 2.2.5.1 throat area, Amin
- 2.2.6.1 mean velocity at throat, Uthr
- 2.2.6.2 critical speed, nc
- 2.2.6.3 dry critical speed, nc,dry
- 2.2.6.4 wet critical speed, nc,wet
- 2.2.7.1 pump, H(Q)
- 2.2.7.1.1 stable pump H(Q) curve
- 2.2.7.1.2 unstable pump H(Q) curve
- 2.2.7.2 peak point
- 2.2.7.3 operating point
- 2.2.8.1 type number, Knum
- 2.2.8.2 specific speed, ns
- 2.2.8.3 suction-specific speed, nss
- 2.2.9.1 rotodynamic pump
- 2.2.9.2 single stage
- 2.2.9.3 multi-stage
- 2.2.9.4 single flow
- 2.2.9.5 double flow
- 2.2.9.6 close-coupled
- 2.2.9.7 double casing
- 2.2.9.8 barrel casing
- 2.2.9.9 rotor
- 2.3.1.1 slip flow, Qsl
- 2.3.1.2 geometrical flow, Qg
- 2.3.2.1 valve seat area, Avst
- 2.3.2.2 valve spill area, Avsp
- 2.3.2.3 pumping chamber area, Apc
- 2.3.3.1 valve seat velocity, Uvst
- 2.3.3.2 valve spill velocity, Uvsp
- 2.3.3.3 piston velocity, Upi, plunger velocity, Upl
- 2.3.4.1 relief-valve set pressure, prv,set
- 2.3.4.2 relief-valve accumulation pressure, prv,a
- 2.3.4.3 relief-valve reseat pressure, prv,rs
- 2.3.4.4 relief-valve back pressure, prv,b
- 2.3.4.5 pressure pulsations, ppul,x
- 2.3.4.6 pre-charge pressure, pd
- 2.3.4.7 net positive inlet pressure, NPIP
- 2.3.4.8 net positive inlet pressure available, NPIPA
- 2.3.4.9 net positive inlet pressure required, NPIPR
- 2.3.5.1 clearance volume, Vcl
- 2.3.5.2 swept volume, Vsw
- 2.3.5.3 geometric displacement volume, Vg
- 2.3.5.4 rod load, RL
- 2.3.5.5 volumetric efficiency, η1–2
- 2.3.6.1 single acting
- 2.3.6.2 double acting
- 2.3.6.3 simplex, duplex, triplex, multiplex
- 2.3.6.4 inboard pump
- 2.3.6.5 outboard pump
- 2.3.6.6 manifold
- 2.3.6.7 pulsation dampener
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Nahlásit chybu
2.1.14.3 minimum allowable continuous speed, nmin,ad
lowest speed for continuous operation recommended by the manufacturer
NOTE The minimum allowable continuous speed is expressed in reciprocal minutes or reciprocal seconds.
2.1.14.3 minimální dovolené trvalé otáčky, nmin,ad
nejnižší otáčky pro trvalý provoz doporučené výrobcem
poznámka Minimální dovolenétrvaléotáčky jsou vyjádřeny v recipročních minutách nebo recipročních sekundách.