ARI Armaturen CONA all-in-one PN40 EN - Manual (Page 5)

Rev. 0040808000 0808 Page 5
Operating and installation instructions
CONA
®
All-in-one
b) Thermostatic steam trap series 61A
(refer to Fig. 4 page 7)
(for particular description of the control system, refer to the Operating and installation
instruction of CONA M series 610)
The steam trap uses the condensate temperature and available upstream pressure for
control. It vents automatically during system start-up and operation. It has a corrosion-
resistant, water hammer-proof diaphragm capsule which always discharges the
consistently supercooled condensate a few degrees below the upstream pressure-
dependent boiling temperature.
c) Thermodynamic stam traps series 64A
(refer to Fig. 4 page 7)
(for particular description of the control system, refer to the Operating and installation
instruction of CONA TD series 640)
For control the steam trap uses the condensate temperature as well as the available
upstream pressure and back pressure.
In the controller (pos. 24) the valve plate is enclosed by the cap and the seat. When the
boiling temperature of the medium is reached, a cushion of steam forms over the valve
plate and presses the valve plate onto the seal faces of the seat.
To a very great extent the external sealing cap (pos. 6) frees the steam trap (in PN40) from
environmental influences. The steam cushion collapses as a result of condensate formation
and the associated temperature drop.
The system pressure lifts the valve plate from the seat face. The steam trap opens and
removes condensate.
The steam trap vents air automatically during system start-up and operation, but with a time
lag. The steam trap acts as a non-return valve.
d) Ball float steam traps series 63A
(refer to Fig. 6 page 7 and Fig. 9 page 14)
(for particular description of the control system, refer to the Operating and installation
instruction of CONA SC series 634)
The steam trap is controlled by a swivel-mounted ball float (pos. 24.16).
If condensate is flowing towards the steam trap, the ball float (pos. 24.16) rises and opens
the discharge valve using the lever mechanism.
An intercoupled diaphragm capsule (pos. 24.17) ensures automatic start-up air venting
when cold
.
If the amount of condensate decreases or if there is no condensate, the float ball
(pos. 24.16) falls and shuts the discharge valve
.
The compact float ball (pos. 24.16) exerts level-dependent control on the valve ball
(pos. 24.4) by means of a lever mechanism. As the level of condensate rises, the valve ball
(pos. 24.4) is rolled off the valve bore by the lever mechanism, thus opening the valve. The
condensate can now drain away.
If the amount of inflowing condensate is less than the possible valve output or if there is no
condensate flow, the ball float (pos. 24.16) falls and the valve ball (pos. 24.4) rolls back
onto the valve bore. The valve is now closed.