LowFlow JRPL/JRPH Series Pressure Regulators - Manual (Page 3)

If You Experience Erratic Operation; Chattering:
A. Oversize regulator; inadequate rangeability
1.
Check actuator flow conditions, re-size regula-
tor for minimum and maximum flow.
2. Increase flow rate.
3. Decrease regulator pressure drop; decrease
inlet pressure by placing a throttling orifice in
inlet piping.
4. Install next step higher range spring. Before
replacing regulator, contact factory.
B. Worn plug or seat; inadequate guiding. Replace
trim (possible body replacement).
C. Weakened/broken return spring. Determine if cor-
rosion is causing plug to not move freely. Replace
return spring.
13. Tighten the bottom cap (7) until a positive mechani-
cal stop is felt.
14. Thread the adjusting knob (24) into the spring
housing (2). The valve is now ready for service.
If the Regulator can’t pass sufficient flow:
A. Regulator not closing tightly. Inspect plug and seat
sub-assembly, replace if worn.
B. Downstream blockage
1.
Check system; isolate (block flow at regulator
inlet not outlet).
2. Relocate regulator if necessary
C. No pressure relief protection. Install safety relief
valve, or rupture disc.
D. Restricted piston movement. Ensure no moisture in
spring chamber at temperature below free point.
Troubleshooting