"> Grundfos CR 15
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Grundfos

CR 15

Grundfos CR 15 — Freshwater cooling, vertical multistage centrifugal.

Components & Design

Component data being added…

Technical Data

Material Cast iron housing, stainless steel internals
Flow Rate up to 92 GPM
Head up to 700 ft
Motor Power 2-30 HP

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Common failures & inspection points

Korrosion in See-/Brackwassersystemen - Verprüfung der Materialspezifikation (Titanium CRT vs. Stainless Steel CRN vs. Standard Cast Iron CR)

Check material certificate and surface finish; verify titanium marking on CRT type plate; confirm corrosion resistance against ASTM seawater standards

Seal and bearing wear at high temperatures (up to 180°C for CRN with Air-Cooled-Seal) - inspection requirement under thermal load

Verify seal type (mechanical vs. air-cooled); perform thermometer reading; check wear pattern on bearings and seal; review service intervals

Cavitation risk and pressure fluctuations in ship cooling systems - verification of NPSH requirements and pressure relief valves

Perform suction-side pressure measurement; compare NPSH availability with operating condition; check pressure relief valve function; verify cavitation noise/vibration at various speeds

VFD integration errors and electronics failure risk in CRTE/CRE/CRNE variants with variable frequency

Check VFD firmware version; validate sensor function (pressure, temperature, flow); check power supply voltage and frequency; monitor alarm/error code logging

Wear of back-pullout bearings and shaft seal in NK series (long service intervals between inspections)

Check shaft runout with dial indicator (max. 0.1-0.2 mm); verify bearing clearance with lubricant control; measure shaft axial displacement before/after 100 operating hours

Type-general inspection and maintenance points for this equipment category — not model-specific.

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Equipment Model #144872 · ✓ still in production