Conventional packaged design
Uncomplete machine
Loose delivered items
Costly installation
ZH
Competition
ZH
Competition
ZH
Competition
ZH
Competition
LOOSE DELIVERED COMPONENTS
Relying on external instrument air
ZH
COMPETITION
LOOSE DELIVERED
MOUNTED ON-SITE
ZH
Competition
Deterioration of performance with larger clearances due to corrosion
Lower heat removal capacity of coolers due to obstructed cooler tubes
ZH
Competition
COPPER + ALUMINIUM
Carbon steel end plates
Cu + Al > galvanic corrosion
Prone to water leaks
Price adder for SS: $34’000 !
U-bend >> no rodding
Clogging of small tube diameters
ZH
Competition
AGMA Q12
Replacement of bull gear and pinions in case one fails
>> very high cost if it happens
>> complicated maintenance
ZH
Competition
SHRINK FIT (HEAT)
No inspection of bearings on-site
Complete rotor assembly to be returned to factory
ZH
TA2000-3000-6000
Highest stability and reliability
Inspection & replacement on-site
ZH
TA2000-3000-6000
Highest stability and reliability
Inspection & replacement on-site
THRUST COLLARS
ROLLER BEARINGS
Sensitive to varying load/unload cycles
Risk of metal fretting
Large clearance between shroud and impeller
>> higher SER
ZH
TA
LABYRINTH SEAL
Aluminium labyrinth teeth
Vibrations will damage seal
ZH
TA2000/3000/6000
High leakage rate
Prone to wear
EJECTOR TYPE VACUUM
visible oil spill to atmosphere
25 m³/h (15 cfm) instrument air permanent consumption
ZH
TA2000-3000-6000
Conventional packaged design
Uncomplete machine
Loose delivered items
Costly installation
ZH
I-R CENTAC
ZH
Competition
Options:
Silencing canopy 75 dB(A), adder $9,000
Inlet guide vanes, adder $8,000
Cu-Ni cooler bundle tubes, adder $4,000
Centac CV2
Options:
Silencing canopy, adder $12,000
Inlet guide vanes, adder $10,000
Cooling water manifold, adder $6,000
Copper-nickel cooler bundle tubes, adder $5,000
Centac C950
Options:
Silencing canopy, adder $15,000
Inlet guide vanes, adder $16,000
Cooling water manifold, adder $8,000
Copper-nickel cooler bundle tubes, adder $7,000
Centac 3CII
ZH
Competition
LOOSE DELIVERED COMPONENTS
Relying on external instrument air
ZH
Competition
LOOSE DELIVERED
MOUNTED ON-SITE
ZH
Competition
ZH
I-R CENTAC
1
3
2
WEAK POINT
THRUST COLLAR
in ONE direction
Sensitive to varying load/unload cycles >> only CPC
Risk of metal fretting
ZH
I-R CENTAC
VERTICALLY-split gearbox
Inspection bearings: 30 hours !
High maintenance cost
Only AGMA Q11/Q12
ZH
I-R CENTAC
Extremely high service cost
AGMA Q12
Replacement item
ZH
Competition
POLYGONE SHRINK FIT + BOLT
Difficult to (dis)assemble
High risk of fretting
ZH
I-R CENTAC
ZH
I-R CENTAC
TILTING PAD
HORIZONTALLY-SPLIT
Maintenance and inspection
Thrust bearings for axial forces
Highest stability and reliability
Inspection & replacement on-site
Seal air required
to ensure oil-free air
CARBON RING AIR SEAL
LABYRINTH OIL SEAL
Patented combination
Double protection
No external air
Minimal losses
COPPER
Both for tubes & fins
Fins: copper with solder coating
Cu + Al > galvanic corrosion
Prone to water leaks
Air-in-tubes
Chemical cleaning, no rodding
ZH
I-R CENTAC
ZH
I-R CENTAC
Cooler performance not affected due to corrosion-resistant coating
Clearances between impeller and inducer not affected over time due to coating
WEAK POINT
OIL TANK OIL QUANTITIES
Oil containging frame
400 l oil
Expensive oil
Operating life time 2 years
ZH
I-R CENTAC
Designed for service revenues
CARTRIDGE
visible oil spill to atmosphere
ZH
I-R CENTAC
THROTTLE VALVE
Higher energy consumption and smaller turndown
throttling the flow increase pressure drops
>> money down the drain
IGVs on Centac not effective due to location
ZH
I-R CENTAC
Optional
Inlet Guide Vanes (IGV)
PNEUMATIC ACTUATORS
Machine trips due to failure in supply of instrument air
ZH
I-R CENTAC
Additional Piping
External Buffer Air
UNIQUE
COMPLETE
SOLUTION
CREATING CUSTOMER’S ADDED VALUE
Competitor’s Puzzle
ZH SERIES
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