DRESSER RB 4700 Manuel D'instructions page 12

Materials
Body
Pilot
Head
Internal parts
Seals
Diaphragm
* DVGW approval for Pemax = 16 bar (with modified diaphragm housing).
Selection of the regulator version
To specify the version of the RB 4700 series to be ordered, the options and
relevant codes should be selected from the table below.
R X X
B
E
Example: Model RBE 471 1 DN25 S is a regulator with a TF 51 1 pilot, an over-pressure shut-off and silencer.
Selection of the safety shut-off options
SSV 8600 with: DN 25 / 40 / 50 / 80 / 100
SSV 8500 with: DN 25 /40 / 50 / 80 (Please contact for pu≥6 bar by DN50-DN80)
Safety device features
Manual bottom control for voluntary intervention
Manual reset
Built-in by-pass system
12
Spheroid graphite cast-iron EN-GJS-400-18LT
Cast Steel
Blocks: steel UNI 5105
Cover: aluminum UNI 6362
Pressed steel / UNI EN10025
Stainless steel and brass
Nitrile rubber
Polyester fabric
4 7 X
1
2
3
X - D DN
0
1
2
- D
25
40
50
80
100
X Variants
Balanced - High accuracy version
External impulse
Low pressure (TF 51 1): 5 - 280 mbar
Medium pressure (TF 512): 0. 1 - 1 bar
High pressure (TF 513): 0.25 - 13 bar
Without safety devices
Over-pressure shut-off valve
Over- and low-pressure shut-off valve
DVGW approval
Orifice (Ø 30 mm)
Orifice (Ø 38 mm)
Orifice (Ø 48 mm)
Orifice (Ø 78 mm)
Orifice (Ø 98 mm)
S Silent version