ARI Armaturen CONA all-in-one PN40 EN - Manual (Page 4)

Page 4 Rev. 0040808000 0808
Operating and installation instructions
CONA
®
All-in-one
4.2 Operating principles
(refer to Fig. 1 - Fig. 2 page 6)
The product concept is based on a robust modular design with integrated shut-off valves
(ball / seat chamfer). This modular design can be used as the basis for steam traps with
several control systems.
- Bimetallic steam trap series 60A
- Thermostatic steam trap series 61A
- Thermodynamic stam traps series 64A
- Ball float steam traps series 63A
The valve is based on a hard-sealing (metal on metal) construction :
(refer to Fig. 7 page 10 - Fig. 8 page 11)
- body (pos. 1) / screw fitting (pos. 15)
- seat (pos. 3) / body (pos. 1)
- valve plug (pos. 4) / seat (pos. 3)
- safety back-sealing mechanism
Stop valve with gland packing: spindle (pos. 11) / screw fitting (pos. 15)
Stop valve with bellows seal: spindle (pos. 11) / spindle guide (pos. 16)
There are also graphite rings (pos. 5) which take over external sealing in the position
between “OPEN” or “SHUT”.
Valve position:
OPEN - Safety back-sealing mechanism effective when valve fully open.
SHUT - Valve plug (pos. 4) / chamfer at seat (Pos 3) seal effective.
a) Bimetallic steam trap series 60A
(refer to Fig. 3 page 7)
(for particular description of the control system, refer to the Operating and installation
instruction of CONA B series 600
For regulation the steam trap uses both condensate temperature as well as available
upstream pressure and back pressure. As the temperature of the medium rises the
bimetallic plates arch, automatically reducing valve lift. An intermediately mounted
compression spring also influences valve lift in the lower pressure range, so that when
acting together with the bimetallic plates the controller always opens and closes a few
degrees below the upstream pressure boiling temperature. A pendulum-form support for
the valve spindle ensures consistent operation, irrespective of the position in which the
steam trap is mounted.
The steam trap vents air automatically during system start-up and operation.
The steam trap has a corrosion-resistant, water hammer-proof bimetallic controller, non-
return protection, and a factory setting for average condensate sub-cooling of approx. 15K
(PN16-40).
The built-in controller is marked on the type plate as well as on the securing component.
ATTENTION !
Do not use shut-off valves for OPEN-SHUT function to throttle volume flow.