http://www.akvo.co.uk/ This powerpoint is about steam and why we use it. AKVO can deliver your water & steam system compliance, efficiency & hygiene requirements from our facilities in Chesterfield. Our staff have experience in many environments, notably the food, pharmaceutical, foundry, engineering and building services areas. Unit 3A Davian Works Storforth Lane Chesterfield Derbyshire S40 2TU

1. WHY DO WE USE STEAM?
Jonathan Beresford BSc (Hons)
MSc
AKVO Ltd
07773 335812

2. WHY USE STEAM
 Higher heat content than hot water
– @100psi steam = 2800 kj/kg
– @100psi hot water = 720 kj/kg
 Means smaller pipes can be used
 Means lower flow rates
 Means less weight needs to be supported
BUT
 We need a condensate return system

3. WHY BOTHER TO RETURN THE
CONDENSATE
 It is very hot
– @15psi hot water contains 500kj/kg
– @90 deg C hot water contains 380kj/kg
– @10 deg C raw water contains 40kj/kg
 It is almost pure
– Reduces blowdown
 Saves energy
– Reduces chemical needs
 Lowers oxygen content
– Minimises water costs

4. CONDENSTAE SYSTEM
COMPONENTS
 Steam traps
–
–
–
–
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
Thermostaic
Ball float
Thermodynamic
Liquid expansion
Sight glasses
Strainers
Air vents
Receivers
Pumps

5. LIQUID EXPANSION TRAP
 Contains an oil filled
element to operate at
preset temperature
 Operates between 60
– 100 deg C
 Must be installed with
condensate discharge
upright.

6. BALANCE PRESSURE TRAP
 Can be installed
horizontally or
vertically

7. FLOAT TRAP
 Maximum pressure
230psi
 Should be fitted as
close as possible to
the item of plant
requiring trapping.
 Very effective at
removing high loads of
condensate under start
up conditions

8. FLOAT TRAP WITH AIR VENT
 Used where steam
locking may be a
problem.

9. INVERTED BUCKET TRAP
 Designed for
installation in vertical
pipe work

10. BI-METAL STEAM TRAP
 Can be installed
vertically or
horizontally.
 Can be of a more
complex design
 Installed where precooling of the
condensate is required
prior to discharge.

11. STRAINERS
•Designed to remove
particulates ahead of
steam traps.
•Must be cleaned out
regularly.
•Available in a range of
materials.

12. RECOVERY
•Collects condensate
from traps.
•Automatic pump
operation.
•Returns condensate
to hotwell at low
pressure.