Emerson EZH and EZHSO Series Pressure Reducing Regulators Manual de instrucciones Pagina 5

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5
Standard Pilots
Pu
Pd
R1
PM
RM1
F1
RP1
PR1
RP IP
Upper
Diaphragm
Lower
Diaphragm
IS
20
10
21
22
13
25
11
12
23
10
14
15
16
26
Figure 5. Type EZH Regulator with Type BSL 85 Pilot System
Hard Trim Pilot Systems (continued)
Principle of operation based on BSL 85 Pilot System
“Fail to Close” Version
Pu: Inlet pressure
Pd: Outlet pressure
Pm: Modulated pressure
RP: Pilot Reject
IP: Pilot Impulse
IS: Slam-Shut Impulse
R1: Pilot feed tap
F1: Filter
RM1: Motorized Pressure tap
RP1: Pilot Reject tap
PR1: Pre-expansion Relay
PM: Monitor Pilot
Europe, Middle East, and Africa Only
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