Castolin Eutectic Tri-Safe II Instructions And Parts Download Page 4

D. Built-in inlet fi lters, to prevent entry of solid foreign matter. 

E. Gauges, to indicate inlet and outlet pressures. 

F. A built-in relief valve, to protect the regulator. 

 

CAUTION: 

CYLINDER VALVE 

CONNECTION MUST MATCH 
REGULATOR CONNECTION. BE SURE 
REGULATOR IS USED ONLY WITH GAS 
SHOWN ON LABEL

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2

8

3

9

4

10

5

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1.   XUPER TRI-SAFE FLASH ARRESTOR AND  
 CHECK 

VALVE

2.   OUTLET NIPPLE
3.   OUTLET GAUGE (WORKING PRESSURE)
4.  INLET GAUGE CYL. PRESSURE
5. CYLINDER 

VALVE

6. INLET 

NUT

7. INLET 

GLAND

8. CYLINDER
9. ADJUSTING 

KNOB

10. REGULATOR LABEL
11. HOSE TO EQUIPMENT

Figure 1. Typical Regulator and Connection to Cylinder

II. INSTALLATION 

Figure 1 shows typical regulator parts and connections to a cylinder; connect 
regulator as follows:

A Observe precautions in SAFETY Section. 

B.   Before connecting regulator to a cylinder or pipeline, slightly engage adjusting 
knob (turn in, clockwise) to drain regulator, then release knob (counter clockwise). 
C.   Connect regulator inlet connection to cylinder or pipeline and tighten it fi rmly but 
not excessively, with a suitable wrench. 
D. At this point, it is recommended that a Eutectic Tri-Safe Flashback Arrestor be 
installed on the regulator outlet fi tting. This is necessary in order to protect the regulator 
and cylinder in the event a fl ashback occurs. 
E.   Connect and tighten hose nut to fl ashback arrestor fi tting and attach downstream 
equipment as needed.

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