PURMO RFA 470 Refurbishment Valve User Manual
- June 8, 2024
- PURMO
Table of Contents
PURMO RFA 470 Refurbishment Valve
Replace
Fellingsbro M68
- RFA 470, 490, 530, 550
- M22x1,5, M18x1,5, M24x1,5, M21x1,5 Fellingsbro M68
Function
Shut-off:
Remove the cover with a 4 mm Allen key. Close with a 2,5 mm Allen key 4
turns.
adjustable:
For 2-pipe close with a 2,5 mm Allen key 6 turns.
Set fully open pre-setting and bypass at delivery, 4 turns.
Assemble
If the radiator has deviations, a softer gasket can be used to seal better. Check the sealing surface is clean, full, flat and no rust that can create leaks.
Technical data
- Pressure class PN10
- Max closing pressure 150 kPa
- Max temperature 100°C
- Min temperature 0°C
- Material Brass, EPDM gaskets, stainless steel
- Fittings pipe
- RFA 470 M22x1,5
- RFA 490 M18x1,5
- RFA 530 M24x1,5
- RFA 550 M21x1,5
Pre-setting 2-pipe system
Pre-setting 1-pipe system
1-pipe system
The pre-setting opening turns N| kv total| kv radiator| Distribution % to the
radiator
---|---|---|---
0| 0,54| 0,54| 100%
1| 0,60| 0,54| 90%
2| 0,77| 0,49| 63%
3| 1,05| 0,47| 45%
4| 1,36| 0,43| 31%
5| 1,79| 0,4| 22%
6| 2,02| 0,36| 18%
Max| 2,1| 0,34| 16%
Installation
Installation shall be done in accordance with AMA. For proper functioning, must the existing valve be undamaged and that the instructions are followe. For abnormal valve design, improper installation, inadequate heat capacity or other conditions beyond our control not guaranteed.
When mounting on existing radiator connection the surface must be cleaned and
be flat and smooth.
For good seal will:
- Scrape.
- Brush thoroughly with a wire brush, can be done with a rotating wire brush. 3. Polish with 3M Scotch Brite red cloth, can be done by rotating the 3M Scotch Brite red rotating pulley.
Nuts to be used must also be controlled so that the threads meets ISO standards correctly.
Shared fiber packing 480 63 56 Item 4731801 included in the delivery, used for
the connections that are flat, clean and smooth. Rubber seal 4731801, for
radiator connections with the inferior surface.
Rubber seal is lubricated on both sides with sealing paste ex. GLIDEX At the
very uneven surfaces recommended liquid gasket.
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