LINSPRAY® CO2 cooling. Maintaining product integrity
in thermal spray applications.
Low-pressure nozzle 18 bar (250 psi) inlet pressure
High-pressure nozzle 56 bar (820 psi) inlet pressure
Why CO2 cooling?
High-energy spray processes, such as high velocity oxy-fuel flame spraying or plasma spraying, can add an
extreme amount of heat to the base material. Problems can often occur when using temperature-sensitive
coating materials or when coating substrates with thin walls or low thermal conductivity due to thermal effects
such as surface deformation and warping. Cooling with carbon dioxide can therefore assist in maintaining
product integrity and quality.
Linde‘s LINSPRAY® system maintains optimal temperature for various thermal spray applications using Carbon
dioxide (CO2). Compressed air is used as a common cooling medium, but its limited cooling rate can force pauses
in production, therefore creating bottlenecks and process inefficiencies. CO2 cooling can greatly reduce the
cooling time, therefore also reducing fuel gas consumption, metal powder consumption, and cycle times. The
CO2 can be supplied through a low pressure bulk system, or even by dewars or cylinders for smaller or sporadic
applications.
Applications examples
→→ Temperature-sensitive substrate materials as CFK/titanium/aluminum/magnesium
→→ Thin-walled components
→→ Component with poor thermal conductivity
→→ Oxide-sensitive spray materials
→→ Differing heat expansion, which can cause the coating to flake off
Safety valves
Typical Scheme
of CO2 supply
PI
Withdrawal
valves
Pressure gauge
High-pressure hose
Solenoid valve with
fine filter
CO2 nozzles
CO2 pressure tank
Control box
Cooling jet
Torch
→ LINSPRAY® CO2 cooling. Maintaining product integrity in thermal spray applications.
CO2 consumption
and spray times
Nozzle
Consumption
g/min
TSF 15
TSF 20
TSF 25*
TSF 30
TSF 1.2*
LP 0.8
LP 1.0*
LP 1.5*
165
215
355
440
830
400
600
1200
* = standad nozzle Comparison of CO2 nozzles:
cooling time from
212°F to 68°F
Approximate Spray Time [h]
044 size high pressure
180l liquid
cylinder with dip tube
dewar
60lbs
430 lbs
2.7
19.7
2.1
15.1
1.3
9.1
1.0
7.4
0.5
3.9
do not use
8.1
do not use
5.4
do not use
2.7
Small 6 Ton
CO2 tank
13000 lb
606.1
465.1
181.7
227.3
120.5
250.0
166.7
83.3
= requires pressure booster
212
Temperature [°F]
2 of 2
Nozzle 10
Nozzle 15
Nozzle 20
Nozzle 25
Nozzle 30
Nozzle 1.0
Nozzle 1.2
176
140
104
68
32
8
16
24
32
40
48
Time [s]
56
64
72
80
88
The Linde CO2 cooling system is available as a complete system, including all the necessary operating
components. (Content however, may deviate from picture depending on country).
Part
Nozzle Kit
Nozzle TSF 15
Nozzle TSF 20
Nozzle TSF 25
Nozzle TSF 30
Nozzle TSF 1.2
Nozzle LP 0.8
Nozzle LP 1.0
Nozzle LP 1.5
Nozzle Holder
Order number
810815
810816
810817
810818
810819
810820
810821
810822
810823
810854
Linde North America, Inc.
575 Mountain Ave., Murray Hill, NJ 07974 USA
Phone +1.800.755-9277, www.lindeus.com
Linde North America Inc. is a member of The Linde Group. Linde is a trading name used by companies within the Linde Group.
The Linde logo is a trademark of The Linde Group. © The Linde Group 2013.
2084_0413
Scope of supply
0