Lowflow JBPH Series Back Pressure Regulating Valve Instrukcja Użytkownika Pobierz pdf (Strona 3)

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12. Remove seat assembly (14)(15) from body (1) and discard.

13. Inspect all parts for damage and replace if necessary. Remove and

replace bottom cap seals (8)(12) (lubricate lightly with Krytox lubri-

cant). Replace seat assembly (14) and insert the bottom cap (2) back

into the body (1). Note: Use only parts manufactured and supplied

by LowFlow Valve for these parts.

Troubleshooting

1. Erratic Operation; Chattering

• Oversize regulator; inadequate rangeability

- Check actuator ﬂ ow conditions, re-size regulator for mini

mum and maximum ﬂ ow.

- Increase ﬂ ow rate.

- Install next step higher range spring. Before replacing

regulator, contact factory

• Worn plug or seat; inadequate guiding

- Replace trim (possible body replacement)

• Valve is stuck in position.

- Determine if corrosion is causing piston assembly/ plug to

not move freely. Clean or replace parts as necessary.

2. Regulator can’t pass sufﬁ cient ﬂ ow

• Regulator not closing tightly

- Inspect seat assembly and plug; replace if worn.

• Downstream blockage

- Check system; isolate (block ﬂ ow at regulator inlet- not

outlet).

- Relocate regulator if necessary

• No pressure relief protection

- Install safety relief valve, or rupture disc.

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Lowflow JBPH Series Back Pressure Regulating Valve Instrukcja Użytkownika Strona 3