1. System One Pumps S1-101 Construction and Features

2. Frame Mounted Centrifugal Pump

3. Major Elements of Pump Units (of Interest)
Power End
Wet End
Driver
Foundation (Baseplate)

4. Pump “Wet End”
Impeller
Casing w/ Feet
Backcover (Seal Chamber)

5. Wet End – Casing w/ Feet Centerline Mounting Support Legs/Feet
Discharge
Flange
Suction
Flange
Casing Drain & Plug (Option)

6. Impellers – Basic Types
Enclosed
Open

7. Wet End – Impeller
“Eye” Area
Vanes
Shroud

8. Why Impellers are Trimmed
Maximum Impeller
H vs Q
Head
Minimum
Impeller
H vs Q
TDH
System Curve – System Relationship of Q & H
GPM

9. Wet End – Backcover (Seal Chamber)
Wetted Face
(Front)
Viewing Back Side
Mechanical Seal Gland Studs & Nuts
Mechanical Seal Environment
Mechanical Seal Chamber Flush Tap

10. Wet End – Jacketed Backcover (Option)
Sometimes the backcovers are jacketed.
Allows an external fluid to circulate around the mechanical seal environment.
Maintains proper temperature control (heating or cooling) of the mechanical seal.
External Fluid Circulation Chamber

11. Wet End – Backcover - Other Common Options
Different chamber designs
Taper bore and cylindrical bore.
Throttle Bushings
Various designs & materials.
Restricts flow into mechanical seal chamber.
Most bushings require special machining of backcover.
Shortened chamber depth to accommodate special mechanical seal designs

12. Wet End (Component) - Mechanical Seal
Keeps the Liquid Being Pumped from Leaking Out Past the Pump Shaft
Installed on the Shaft in the Backcover Seal Chamber
A Purchased Item (if Installed)
Many Global Manufacturers

13. Wet End - Simple Mechanical Seal
Single Seal

14. Pump “Power End” Frame (Bearing Housing) Pump Shaft Adapter
Note; Adapter Not Needed On Smallest (Frame “S” & “SD”) Pumps

15. Power End – Rotating Element Assembly
Shaft
(Imp. Threads)
Inboard/
Radial Bearing
Oil Flinger/Filter
Outboard Angular Contact Thrust Bearings
Bearing Retainer Cover
Shaft
Wetted End

16. Power End - Frame Oil Filler Assembly Micrometer Adjustment Assembly
Eye Bolt
(Lifting)
Bearing Cartridge
Shaft
Assembly
Labyrinth Oil Seal (Outboard)
Labyrinth Oil Seal (Inboard)
Oil Bath Reservoir
Bearing Frame Foot

17. Power End – Micrometer Impeller Adjustment Assembly
• Patented Feature
• Precise Repeatable Impeller Settings
• Each Line Represents .003" (.08 mm)

18. Why Impellers Are Adjusted
Set initial pumping clearance (impeller to casing) based on temperature of pumpage
.015” ≤ 100°F
Add .002” for every 50°F above 100°F
.38mm ≤ 38°C
Add .05mm for every 28°C
above 38°C
Pumping
Clearance

19. Why Impellers Are Adjusted (Cont.)
To compensate for wear and renew performance.
Typical reduction in performance due to wear (based on 0.01”/year)

20. Effect of Impeller Clearance

21. Power End – Oil Sight Glass & Magnetic Plug
Observe Oil Level & Condition
Mag. Plug to Maintain Clean Oil

22. Power End – Cooling Coil Option
Cools the Oil and Bearings

23. Power End - Adapter Adapter
Note; Adapter Not Needed On Smallest (Frame “S” & “SD”) Pumps

24. Power End - Adapter

25. How It All Comes Together
Pump & motor/driver mounting type, size and options are selected.
Based on customer requirements, application parameters, motor/driver specifics and sales policies
C-Face or D-Flange Adapter Mounting Example

26. Baseplate & Flexible Coupling
Baseplate is to what the pump & driver are commonly mounted.
Coupling connects the output shaft of the driver/motor to the pump shaft.
Flexible
Coupling
Typical
Baseplate

27. SYSTEM ONE PUMPS Wet End Parts A. VOLUTE (CASING) A B. IMPELLER
C. STUFFING BOX
D. SEALING DEVICE
E. BACKCOVER

28. SYSTEM ONE PUMPS Power End Parts H B A I L D D C E K E G F J
A. BEARING HOUSING
B. FRAME ADAPTER
C. SHAFT
D. BEARINGS
E. BEARING PROTECTION
F. OIL SUMP AREA
G. OIL SIGHT GLASS
H. BREATHER
I. BEARING RETAINER
J. OIL DISPERSION
THRUST BEARING CARTRIDGE
IMPELLER ADJUSTMENT I L D D C E K E G F J

29. System One Pumps
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