Hale MG - Manual (Page 4)

Muscle Pumps
- i -
TABLE OF CONTENTS
SECTION PAGE
1 INTRODUCTION........................................................................................................ 1-1
A. Description ............................................................................................................. 1-1
B. Principles of Operation ............................................................................................ 1-1
Centrifugal Force .................................................................................................... 1-1
Pump Stages ........................................................................................................... 1-1
Single -Stage Pump ..................................................................................................1-3
Single -Stage Pump Operation................................................................................... 1-3
Two-Stage Pump.....................................................................................................1-3
Two-Stage Pump Operation ..................................................................................... 1-5
Volume (Parallel) Operation .................................................................................... 1-5
Pressure (Series) Operation ...................................................................................... 1-5
Volume Versus Pressure Operation........................................................................... 1-5
Transfer Valve ........................................................................................................ 1-6
Choosing Between Volume and Pressure Operation................................................... 1-6
Transferring Between Volume and Pressure Operation .............................................. 1-6
Cavitation ............................................................................................................... 1-7
C. Parts of Pump..........................................................................................................1-8
Basic Parts of Hale Midship Centrifugal Pump .......................................................... 1-8
Pump Body ........................................................................................................ 1-8
Qmax and Qtwo Pumps ...................................................................................... 1-8
Qpak and Qflo Pumps......................................................................................... 1-9
Impeller ............................................................................................................. 1-9
Clearance Rings ................................................................................................. 1-9
Bearings ........................................................................................................... 1-10
Pump Seals ....................................................................................................... 1-10
Packing............................................................................................................. 1-10
Mechanical Seal................................................................................................ 1-11
Auto Lube ®..................................................................................................... 1-11
D. Pump Drives .......................................................................................................... 1-12
Pump Mounting Options ......................................................................................... 1-12
G-Series Gearbox ................................................................................................... 1-12
Principle of Operation............................................................................................. 1-12
LP and XP Gearbox................................................................................................ 1-12
Shifting.................................................................................................................. 1-12
J Series Gearbox..................................................................................................... 1-14
E. Accessories............................................................................................................ 1-14
Priming Pump ........................................................................................................ 1-14
Priming Valves ...................................................................................................... 1-15
Pressure Control Devices ........................................................................................ 1-15
Relief Valve System............................................................................................... 1-15
Hale Total Pressure Master (TPM) Relief Valve System........................................... 1-17
Cooling Options ..................................................................................................... 1-22
Model K Auxiliary Heat Exchanger/Cooler......................................................... 1-22
Thermal Relief Valve (TRV).............................................................................. 1-23
Valves ................................................................................................................... 1-24
Suction Valves .................................................................................................. 1-24