OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ofite.com
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4. Power Cord
a. Check the power cord for insulation wear and loose connections near
the heating jacket and plug.
b. Place the heating jacket no farther from the heating jacket than the
length of the power cord.
c. Keep the power cord away from the hot surface of the heating jacket.
Installing wiring, power cords, or electrical connectors will void the
warranty.
Regulator Maintenance and Troubleshooting
Symptoms
Cause: Resolution
Gas leak at the regulator outlet when
the adjusting screw is loosened fully
counterclockwise
Seat leak or *creep: Repair the
regulator
Outlet pressure increases while
downstream valves are closed
Seat leak or *creep: Repair the
regulator
Gas leak from the spring housing
case
Diaphragm failure: Repair the regu
-
lator
Excess drop in outlet pressure with
the regulator flow open
Blocked seat assembly or inlet filter:
Repair the regulator
Gas leak from any pipe thread joint
Loose fitting: Remove the connec
-
tion. Clean the affected surfaces.
Reapply Teflon tape and tighten.
Gas leak from relief valve
Faulty relief valve: replace the valve.
Seat leak or *creep: Repair the
regulator
Inconsistent repeat readings
Seat sticking: Repair the regulator.
Bad pressure gauge: Replace the
gauge.
Gauge does not return to zero with
no pressure applied to the regulator.
Gauge has physical damage: Re
-
place the gauge.
*Creep is an increase in outlet pressure that occurs when pressure escapes even when the
valve is closed. Regulator seats can be compromised by particles in the process stream
which can cause minor imperfections in the sealing surface. The high flow and small orifice
created during pressure regulation combine to turn a very small particle into a fast projectile.
This projectile can nick the sealing surface of the seat and cause leaks. Filtering particulates
from the process stream should be a high priority, and a small filter can reduce the potential
for creep and increase the life expectancy and accuracy of the regulator.
