ARI Armaturen CONA B PN630 EN - Manual (Page 3)

Rev. 0040803000 4610 Page 3
Operating and installation instructions
CONA
®
B - Bimetallic steam trap
4.0 Description
4.1 Scope of applications
Bimetallic steam traps with thermal controller are used for the drainage of industrial steam
facilities.
The information complies to the Pressure Equipment Directive 97/23/EC.
It is the responsibility of the machine planner to ensure compliance.
The special markings on the valve must be taken into account.
Refer to the catalogue sheet to see which materials are used in standard versions.
Please contact the supplier or the manufacturer if you have any questions.
4.2 Operating principles
(refer to Fig. 11 - Fig. 12 page 8)
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 (pos. 24.6) arch, automatically reducing valve lift. An intermediately
mounted compression spring (pos. 24.5 only required for PN16-100) also influences valve
lift in the lower pressure range, so that when acting together with the bimetallic plates (Pos
24.6) the controller always opens and closes a few degrees below the upstream pressure
boiling temperature. A pendulum-form support (pos. 24.7) for the valve spindle (pos. 24.3)
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) to approx. 30K (PN63-630).
The built-in controller is marked on the type plate as well as on the securing component
(pos. 24.7).
ATTENTION !
- Refer to the data sheet for applications, limits on use and possibilities.
- Certain media require or preclude the use of special materials.
- The valves are designed for standard operating conditions. If conditions exceed
these requirements, e.g. aggressive or abrasive media, the operator should
state the higher requirements when ordering.
- Valves made from grey cast iron are not authorised for use in systems subject
to TRD 110.