Equipment; Marking Of Features - Nippon Gases R-504 Intrucciones De Manejo Y Seguridad

3. EQUIPMENT

1. Cylinder valve
2. Inlet stem (specific for each gas)
3. High pressure gauge (EN 5171)
4. Low pressure gauge or flowmeter (EN 5171)

4. MARKING OF FEATURES

Each regulator shows different markings for identification, according to standard, as
indicated hereafter:
(Example of REGULATOR R-504 for Oxygen)
1. Gas type
2. Regulator class according to EN ISO 2503
3. Max. inlet pressure
4. Max. outlet pressure
5. Date of manufacture (MonthYear)
TYPE OF GAS
OXYGEN
NITROGEN
HYDROGEN
AIR
R-504 REGULATOR
5. Outlet hose nipple
6. Relief valve
7. Washer of inlet stem
8. Outlet nut
200 bar
3
CODE LETTER
O
N
H
D
EN
PT
2
1
H Class 3
10 bar
MMAA
5
21
EN
4