Series 91000
••• Self-Operating Regulators
Operation, Installation & Maintenance Manual
Page 8
ROUTINE SERVICE
Since this instrument is self-contained and practically trouble free, very little maintenance is required. It is
important to keep the stem clean and free of deposits where it passes through the stem seals at the bonnet.
An occasional drop of oil on the stem will aid in eliminating mineral deposits and maintaining a free running
stem for accurate regulation. See Figure.
Figure 2
Removing any sharp mineral crystals from the stem will also reduce the chance of cutting the seal
lips and will prolong the seal life.
The packing seal is self-adjusting.
Do Not Tighten the packing nut beyond finger tight.
Leakage should never be tolerated. Any leak at bonnets, unions, plugs, etc., requires immediate
correction to avoid erosive action and serious damage or personal injury.
