Selection and sizing
CR, CRI, CRN, CRE, CRIE, CRNE
23
WinCAPS and WebCAPS
WinCAPS and WebCAPS are both selection programs
offered by Grundfos.
The two programs make it possible to calculate an
E-pump’s specific duty point and energy consumption.
By entering the sizing data of the pump, WinCAPS and
WebCAPS can calculate the exact duty point and
energy consumption. For further information see
page 89 and page 90.
3. Material
The material variant (CR(E), CRI(E), CRN(E)) should
be selected based of the liquid to be pumped. The
product range covers three basic types.
• The CR(E), CRI(E) pump types are suitable for
clean, non-aggressive liquids such as potable
water, oils, etc.
• The CRN(E) pump type is suitable for industrial
liquids and acids, see List of pumped liquids on
page 74 or contact Grundfos.
For saline or chloride-containing liquids such as sea
water, CRT(E) pumps of titanium are available.
4. Pump connection
Selection of pump connection depends on the rated
pressure and pipework. To meet any requirement the
CR(E), CRI(E) and CRN(E) pumps offer a wide range
of flexible connections such as:
• Oval flange (NPT) - fig. 24
• ANSI flange - fig. 24
• PJE coupling - fig. 24
• Clamp coupling
• Union (NPT[M])
• Other connections on request.
5. Shaft seal
As standard, the CR(E) range is fitted with a Grundfos
shaft seal (Cartridge type) suitable for the most
common applications, see fig. 25.
The following three key parameters must be taken into
account, when selecting the shaft seal:
• Type of pumped liquid
• liquid temperature and
• Maximum pressure.
Grundfos offers a wide range of shaft seal variants to
meet specific demands see List of pumped liquids on
page 74.
6. Inlet pressure and operating pressure
Do not exceed the limit values stated on page 18 and
page 20 as regards these pressures:
• maximum inlet pressure and
• maximum operating pressure.
Fig. 23 CR pump
Fig. 24 Pump connections
Fig. 25 Shaft seal (Cartridge type)
TM
03
21
55
38
05
TM
02
12
01
06
01
T
M
02
05
38
48
00
A (Oval)
G (ANSI)
P (PJE)
