Emerson EZH and EZHSO Series Pressure Reducing Regulators Bedienerhandbuch PDF herunterladen (Seite 3)

EZH and EZHSO Series

Table 1. Main Valve Body Sizes, End Connection Styles and Body Ratings

MAIN VALVE BODY SIZE

MAIN VALVE BODY MATERIAL END CONNECTION STYLE

STRUCTURAL DESIGN RATING

NPS DN psig bar

1 25

WCC Steel

NPT or SWE 1500 103

CL150 RF 290 20.0

CL300 RF 750 51.7

CL600 RF or BWE 1500 103

2 50

NPT or SWE 1500 103

CL150 RF 290 20.0

CL300 RF 750 51.7

CL600 RF or BWE 1500 103

3 80

CL150 RF 290 20.0

CL300 RF 750 51.7

CL600 RF or BWE 1500 103

4 100

CL150 RF 290 20.0

CL300 RF 750 51.7

CL600 RF or BWE 1500 103

Table 2. Outlet Pressure Ranges

TYPE

OUTLET PRESSURE RANGE AC (ACCURACY CLASS) PILOT CONTROL SPRING INFORMATION

psig bar EZH Series EZHSO Series Spring Color Part Number

PRX/120

PRX/125

14.5 to 26

23 to 44

41 to 80

73 to 123

1.00 to 1.8

1.6 to 3.0

2.8 to 5.5

5.0 to 8.5

2.5% 2.5%

Yellow

Green

Blue

Black

M0255240X12

M0255230X12

M0255180X12

M0255220X12

116 to 210

203 to 334

319 to 435

8.0 to 14.5

14.0 to 23.0

22.0 to 30.0

1% 2.5%

Silver

Gold

Aluminum

M0255210X12

M0255200X12

M0255860X12

PRX/120-AP

PRX/125-AP

435 to 1160 30.0 to 80.0 1% 2.5% Clear M0273790X12

PART NAME CONDITION CAUSE EFFECT SERIES REGULATOR REACTION MODE

Filter

Filter Blocked /

Clogged

Debris or aromatics

present in the gas

Decrease of supply

pressure gives

decrease of loading

pressure

EZHSO Open - - - -

EZH - - - - Close

Pilot disk

Pilot cannot

be closed

Debris or aromatics

present, Sour gas

Increase loading

pressure

EZHSO Open - - - -

EZH Open - - - -

Pilot lower

diaphragm

Pilot cannot control

Debris or aromatics

present, Sour gas

Decrease loading

pressure

EZHSO Open - - - -

EZH - - - - Close

Pilot upper

diaphragm

Pilot cannot feed

the regulator

Debris or aromatics

present, Sour gas

Decrease loading

pressure

EZHSO Open - - - -

EZH - - - - Close

Regulator

diaphragm

Not proper

performance of

the Loading

Pressure Chamber

Debris or aromatics

present, Sour gas

Balancing of

Pressures and

charge or discharge

of the loading

pressure chamber

EZHSO Open - - - -

EZH - - - - Close

Pilot

Frozen Pilot,

Type SA/2 working

Moisture in the gas,

high-pressure drop

Type SA/2 loading

upper casing of

regulator, Pilot not

supplying loading

pressure to

lower casing

EZHSO - - - - Close

EZH - - - - Close

Table 3. Spring-to-Open Overview

1 2 3 4 5 6 7 8 ... 39 40

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