神马文学网Grundfos Submersible Recirculation Pumps
来源：百度文库 编辑：神马文学网 时间：2024/06/05 02:43:31
Performance overview
For further details about the SRP performance ranges, see curves for:
>SRP.xx.30.xxx.25 (PDF size: 2,45 MB)
>SRP.xx.50.xxx.27 (PDF size: 2,45 MB)
>SRP.xx.80.xxx.11 (PDF size: 2,45 MB)
>Performance overview, 60 Hz (PDF size: 697 KB)
>SRP.xx.30.xxx.25 (PDF size: 697 KB)
>SRP.xx.50.xxx.27 (PDF size: 697 KB)
>SRP.xx.80.xxx.11 (PDF size: 697 KB)
Material specifications and type key
Material specifications
Component Material DIN W.-Nr./EN standard AISI/ASTM
Bottom fixation Stainless steel 1.4301 304
Column profile tube
Stainless steel 1.4301 304
Top fixation
Stainless steel 1.4301 304
Connection flange PN 10 2/3
Stainless steel 1.4301 304
Relief wire
Stainless steel 1.4404 316L
Crane w/winch
Aluminium - -
Pump rack
Stainless steel 1.4301 304
Motor housing
Cast iron EN-JL1040 -
Gear housing
Cast iron EN-JL1040 -
Hydraulic inlet
Stainless steel 1.4301 304
Impeller
Stainless steel 1.4581 -
Corrosion protection
To ensure long and trouble-free operation, the cast-iron parts are protected against corrosion
by a high-grade multi-layer corrosion system.
Anti-corrosive protection of submerged components: Two-component epoxy coating free from tar.
Minimum thickness 320 μ. Complies with the AA 423 standard.
Type key
Selection guide
Head loss calculation
Pump selection is best carried out when the flow and head have been accurately determined.
The data needed in order to select the SRP with the right specifications are: Required flow, Q – and total head, H.
Calculation of head
H = Hgeo + Hsystem, where Hgeo is the geodetic head
(Hgeo = H2 - H1) and Hsystem is Head Loss in the system:
Hsystem = Hj + Hjn + Hvalve
Hj = Loss in pipe. Hj = λ x (LxV2 / D x 2g)
Hjn = Outlet loss. Hjn = V2 / 2g
Loss in elbows. Typical value 0.1 – 0.2 m
Hvalve = Loss in valve. Typical value 0.05 – 0.25.
It is important to use actual data from the valve supplier.
For more specific calculation please contact Grundfos.
Symbols:
λ = Friction factor - typical value 0.02
L = Pipe length [m]
V = Velocity [m/sec]
D = Pipe diameter [m]
g = Gravity 9.81
Example:
Q = 475 l/sec
Hgeo = 0.35 m
L = 21 m
V = 2.4 m/sec
D = 0.5 m
There are no valves or elbows in the system.
Calculation of loss in pipe:
Hj = 0.02 x (21 x 2.42 / 0.5 x 2 x 9.81) = 0.25 m
Calculation of outlet loss:
Hjn = 2.42 / 2 x 9.81 = 0.30 m
Determination of Head
H = 0.35 m + 0.25 m + 0.3 m = 0.9 m
By using the selection curves for SRP.XX.50.XXX.27 we can determine that the SRP.80.50.378.27 meets the requirements and will deliver
Q = 475 l/sec at H = 0.95 m.
For more details, see the information on the SRP series inWebCAPS or the SRP product brochure.
For further details about the SRP performance ranges, see curves for:
>SRP.xx.30.xxx.25 (PDF size: 2,45 MB)
>SRP.xx.50.xxx.27 (PDF size: 2,45 MB)
>SRP.xx.80.xxx.11 (PDF size: 2,45 MB)
>Performance overview, 60 Hz (PDF size: 697 KB)
>SRP.xx.30.xxx.25 (PDF size: 697 KB)
>SRP.xx.50.xxx.27 (PDF size: 697 KB)
>SRP.xx.80.xxx.11 (PDF size: 697 KB)
Material specifications and type key
Material specifications
Component Material DIN W.-Nr./EN standard AISI/ASTM
Bottom fixation Stainless steel 1.4301 304
Column profile tube
Stainless steel 1.4301 304
Top fixation
Stainless steel 1.4301 304
Connection flange PN 10 2/3
Stainless steel 1.4301 304
Relief wire
Stainless steel 1.4404 316L
Crane w/winch
Aluminium - -
Pump rack
Stainless steel 1.4301 304
Motor housing
Cast iron EN-JL1040 -
Gear housing
Cast iron EN-JL1040 -
Hydraulic inlet
Stainless steel 1.4301 304
Impeller
Stainless steel 1.4581 -
Corrosion protection
To ensure long and trouble-free operation, the cast-iron parts are protected against corrosion
by a high-grade multi-layer corrosion system.
Anti-corrosive protection of submerged components: Two-component epoxy coating free from tar.
Minimum thickness 320 μ. Complies with the AA 423 standard.
Type key
Selection guide
Head loss calculation
Pump selection is best carried out when the flow and head have been accurately determined.
The data needed in order to select the SRP with the right specifications are: Required flow, Q – and total head, H.
Calculation of head
H = Hgeo + Hsystem, where Hgeo is the geodetic head
(Hgeo = H2 - H1) and Hsystem is Head Loss in the system:
Hsystem = Hj + Hjn + Hvalve
Hj = Loss in pipe. Hj = λ x (LxV2 / D x 2g)
Hjn = Outlet loss. Hjn = V2 / 2g
Loss in elbows. Typical value 0.1 – 0.2 m
Hvalve = Loss in valve. Typical value 0.05 – 0.25.
It is important to use actual data from the valve supplier.
For more specific calculation please contact Grundfos.
Symbols:
λ = Friction factor - typical value 0.02
L = Pipe length [m]
V = Velocity [m/sec]
D = Pipe diameter [m]
g = Gravity 9.81
Example:
Q = 475 l/sec
Hgeo = 0.35 m
L = 21 m
V = 2.4 m/sec
D = 0.5 m
There are no valves or elbows in the system.
Calculation of loss in pipe:
Hj = 0.02 x (21 x 2.42 / 0.5 x 2 x 9.81) = 0.25 m
Calculation of outlet loss:
Hjn = 2.42 / 2 x 9.81 = 0.30 m
Determination of Head
H = 0.35 m + 0.25 m + 0.3 m = 0.9 m
By using the selection curves for SRP.XX.50.XXX.27 we can determine that the SRP.80.50.378.27 meets the requirements and will deliver
Q = 475 l/sec at H = 0.95 m.
For more details, see the information on the SRP series inWebCAPS or the SRP product brochure.