Murphy LS200N User Manual
Page 13
Section 15
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01-11-06 -
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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.
Figure 3 – DVO manual valve operator
Figure 4 – Orifice Adjustment with float in
down position