Reciprocating pump
Flapper and piston double-acting type
A.liquid inlet,
B.liquid outlet,
C.piston,
D.air vessel, (to smooth out pulsating flow),
1.suction valve open,
2.suction valve closed,
3.discharge valve open,
4.discharge valve closed,
5.piston moving upwards,
Rotary pump
Horizontal screw pump with external bearings
1.side suction,
2.screw shafts (or rotors) (in a connterflow arrangement),
3.external bearings (and shaft sealing by mechanical seals),
4.tump casing or housing,
5.surge chamber,
6.upward delivery,
7.spring-loaded by-pass valve,
8.spur gear assembly (for driving and driven screw shafts),
DISPLACEMENT
(self priming) not suitable for very high speeds or large capacities
POSITIVE DISPLACEMENT PUMPS
reciprocating pumps
piston pump
diaphragm pump
rotary pumps
screw pump
gear pump
eccentric helical rotor pump
lobe pump
vane pump
Centrifugal pump
diffuser type
volute type
fluid outlet
1.volute casing,
1b.casing,
2.discharge nozzle,
3.impeller,
4.vane,
5.bearing and gland,
6.shaft,
7.diffuser ring,
8.impeller eye,
CENTRIFUGAL PUMPS
diffuser type pump
volute pump
hand pump
motor-driven pump
electrical motor-driven pump / electro-pump
motor pump unit
turbine-driven pump I turbo-pump
CENTRIFUGAL AND AXIAL FLOW
Multi-stage turbo feed pump
1.throat pressure connection,
2.venturi throat insert,
3.discharge distance piece,
4.overspeed trip bolt,
5.shaft,
6.balance piston,
7.ring section,
8.impellers,
9.suction pressure connection,
10.balance return connection,
11.suction connection,
12.suction inducer,
13,trip reset lever,
14,knock-out knob,
15,exhaust connection,
16,sentinel valve connection,
17,overspeed trip gear,
18,turbine wheel,
19.turbine shaft bolt,
20.wear down cover.
21.coupling,
22.baffle plate assembly,
23.nozzle box,