Emerson EZH and EZHSO Series Pressure Reducing Regulators Manuál s instrukcemi stáhnout pdf (Strana 8)

EZH and EZHSO Series

CAUTION

Personal injury or equipment damage,

due to bursting of pressure-containing

parts may result if this regulator is

overpressured or is installed where

service conditions could exceed the

regulator and pilot pressure ratings.

The working regulator must be rated

for the maximum allowable operating

pressure of the system because this will

be its inlet pressure if the monitoring

regulator fails. Also, the outlet pressure

rating of the monitoring pilot and any

other components that are exposed to

the intermediate pressure must be rated

for full inlet pressure.

Working monitor installations require an EZH or

EZHSO Series main valve with a Type PRX/120 or

PRX/120-AP working pilot and a Type PRX/125 or

PRX/125-AP monitoring pilot for the upstream

regulator and an EZH or EZHSO Series with the

appropriate Type PRX/120 or PRX/120-AP pilot for

the downstream regulator.

Adjustment

Adjusting the monitor regulator (Figure 6) is the same

as adjusting the main regulator. Monitor setpoints are

set slightly higher than the main regulator. The monitor

pressure setting should be adjusted so it is at minimum

two times the pilot accuracy band pressure above the

working regulator pressure setting. For the adjustment

of the monitor regulator’s two pilots, please refer to the

section on Startup and Adjustment on page 10.

Installation

WARNING

Personal injury or equipment damage,

due to bursting of pressure-containing

parts may result if this regulator is

overpressured or is installed where

service conditions could exceed the

limits given in the Specication section

and on the appropriate nameplate or

where conditions exceed any rating

of the adjacent piping or piping

connections. To avoid such injury or

Figure 6. Working Monitoring System Operational Schematics

E0876

EZH SERIES

WORKER REGULATOR

EZH SERIES

MONITOR REGULATOR

TYPE

PRX-120

TYPE

PRX-125

TYPE

PRX-120

TYPE

SA/2

CHECK

VALVE

CHECK VALVE

TYPE

SA/2

TYPE PRX

S - BLEED PORT

B - SUPPLY PORT

L - LOADING PORT

A - SENSING PORT

TYPE SA/2:

V - SENSING PORT

R - PILOT SUPPLY PORT

M - INLET PORT

INLET PRESSURE

OUTLET PRESSURE

ATMOSPHERIC PRESSURE

INTERMEDIATE PRESSURE

PILOT SUPPLY PRESSURE

LOADING PRESSURE

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 39 40

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Emerson EZH and EZHSO Series Pressure Reducing Regulators Manuál s instrukcemi Strana 8

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