Emerson EZH and EZHSO Series Pressure Reducing Regulators Manual de instrucciones Pagina 14

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14
Standard Pilots
Operating Instructions and Regulation
Optimization
Table 7. Operating Instructions and Regulation Optimization
UNIT OR PARAMETER INDICATIONS INSTABILITY SLOW REACTION
LACK OF
PRECISION
Hard trim
pilot systems
(Figures 3, 4, 5)
Modulated pressure
valve (key 25)
Wide open.
All settings available except
completely closed
Progressively close,
without completely closing
Open as wide as
possible
No incidence
Reject tap
(key.26)
Open 3/4 turn.
All settings available
Open by successive fractions Close by successive fractions
Pre-expansion relay
(key 13)
See table 4
Decrease the pre-expansion by
successive fractions
Increase the pre-expansion by
successive fractions
Boot trim
pilot systems
(Figure 6)
Pilot vent valve
(BMP 162)
Open 1/2 turn.
All settings available except
completely closed
Look for the best position
between 1/4 and 2 turns
Progressively open No incidence
Feeding tap
(key 29)
Open 1/2 turn.
All settings available
Open by successive fractions Close by successive fractions
Pre-expansion relay
(key 13)
See table 5
Decrease the pre-expansion by
successive fractions
Increase by pre-expansion by
successive fractions
A107
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