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Emerson EZH and EZHSO Series Pressure Reducing Regulators Manual de instrucciones Pagina 7

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Type OS2
7
DESCRIPTION (BMS)
• Impulse line
The impulse line (IS) is connected to the network to be
protected (normally downstream of the regulator).
• Impulse type
Depending on the pressure and precision required,
different types of impulse may be used: Diaphragm, Piston
or Bellows.
• Springs
To cover all pressure ranges, a set of springs of equal
length and diameter, but of different wire diameter (2 to
6.5 mm), may be used.
• Detection
Table 10. Spare Parts
Description
Diaphragm (Max. and/or Min.) Piston (Max. or Min.) Bellows (Max. and/or Min.)
162 71 27 17 236 315
Type BMS 1
Compete box 181 071 181 072 180 999 180 998 181 073 181 074
Base 181 105 181 106 181 107 181 108 181 109 181 110
Hook kit 181 111
Type BMS 2
Compete box 181 084 181 085 181 070 181 069 181 086 181 087
Base 181 105 181 106 181 107 181 108 181 109 181 110
Hook kit 181 112
Spare Parts
Diaphragm 137 906 142 549 - - - - - - - - - - - - - - - -
Set of O-rings - - - - 197 352 - - - -
Items in bold are spare parts.
Table 11. Detection Configurations
Actioner Max. only Min. only Max. and Min.
One
BMS
Type
BMS 1
Releasing screw Active Neutral Active
Hook Neutral Active Active
Two
BMS
Type
BMS 1
Releasing screw Active
- - - - - - - -
Hook Neutral
Type
BMS 2
Push button Active Neutral Active
Hook Neutral Active Active
Figure 20. Type BMS 1 Max. Only
N19
Figure 21. Type BMS 1 Min. Only
N20
D2
D1
Figure 22. Type BMS 1 Max. - Min.
N21
D2
D1
OPERATION (BMS)
The pressure of the network to be protected pushes the
diaphragm, piston or bellows. The force resulting from this
opposes the force (adjustable) coming from the setpoint
spring. When pressure varies, the detection rod moves and
provokes releasing by max. or min. pressure.
CONNECTIONS (BMS)
On the mechanism box: 2 H M6x16 screws
(code 402018)
BM sealing: Flat O-ring and tight shut O-rings
On the manometric box: 1/4" NPT screw
Recommended tube: 8/10 mm
The sensing line must be connected downstream of
the regulator.
Table 12. Max. Pressure Releasing
Pressure
Type BMS 1 Type BMS 2
Releasing screw Push button
Normal Without D1 pin contact Without D2 pin contact
Increase With D1 pin contact With D2 pin contact
= Setpoint Rotation of releasing stem and 1st stage trigger
Table 13. Min Pressure Releasing
Pressure
Type BMS 1 Type BMS 2
Hook Hook
Normal Without D2 pin contact Without D1 pin contact
Decrease With D2 pin contact With D1 pin contact
= Setpoint Rotation of releasing stem and 1st stage trigger
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