Murphy L1100 Manuel D’Utilisation

9 - 

 
CAUTION:  Ensure that the actuator arm is not bent during reassembly. 
 

 

14. 

If the LS200NDVO/DVOR was removed from the vessel, re-install it at this time.  
Thread sealant is recommended. 

15. 

Connect to the inlet, outlet, and exhaust fittings according to installation drawings. 

10. 

With the DVO aligned over the hex on the LS200NDVO body, tighten the valve using 
the 9/16” hex wrench.  You may need to hold the DVO while tightening to keep it from 
rotating.  

11. 

The pneumatic input signal should be regulated between 30 and 70 psi for proper 
setting of the adjustable orifice.  With the float in the down position adjust the 
adjustable orifice down until it touches the seat.  See Figure 4. 
 
If the DVO is still leaking make slight adjustments (1/32 turn).  Excessive adjustments 
will lock up mechanisms.  After adjusting make sure float moves freely up and down. 

12. 

Replace the LS200NDVO/DVOR cover. 

13. 

Using the appropriate tools re-install the inlet, outlet, and exhaust fittings to the new 
DVO.  

NOTE:  Thread sealant is recommended although care should be used to 
not allow excess to enter valve.