22
O-rings
With time and use, O-rings can become brittle. This can cause poor operation and even
failure of the positioner.
Always check O-rings when performing any work on the positioner and replace bad O-
rings.
A thin layer of silicon grease applied on the NBR (Black) O-rings prolongs their life. On Q
(red) O-rings, use a non silicon based grease.
Filter plug (EP5)
Caution! Do not operate the unit without filter and filter plug installed. Do not attempt
to unscrew filter plug while positioner is pressurized.
EP5 is equipped with a built in secondary filter located on the side of the I/P unit.
For replacement or inspection, make sure that positioner unit is not pressurized, then unscrew
filter plug 1. Remove filter 3 and install a new into the filter plug . Check condition of O-
ring 2 and filter compartment. If moisture is found, check upstream filters/oil-water separators.
Moisture can cause I/P failure.
Reinstall filter plug.
1
2
3
Содержание PMV P4
Страница 1: ...IOM Instructions P4 P5 EP5 alve Control System...
Страница 11: ...11 X Port plugged C1 C2 S C1 C2 S C1 C2 S I I I Direct function...
Страница 27: ...27 Dimensional drawing P4...
Страница 28: ...28 17 Spare parts 21 20 3 21 20 20 15 18 21 1 6 16 20 20 10 17 13 19 20 2 20 11 20 21 12 20 7 8 9 P4...
Страница 30: ...30 Spare parts P5 EP5 84...
Страница 32: ...32 84 Spare parts P5 EP5...
Страница 34: ...34 18 Certificates Cenelec Atex black label...
Страница 35: ...35 Cenelec Atex black label...
Страница 36: ...36...
Страница 37: ...37 Cenelec Atex white label...
Страница 39: ...FM White label...
Страница 40: ...CSA White label...
Страница 41: ......