D103077X014
Installation Guide
English – June 2015
EZH and EZHSO Series
www.fisherregulators.com
Introduction
This installation guide provides instructions for
installation, startup, and adjustment. To receive a copy
of the instruction manual, contact your local Sales
Office or view a copy at www.fisherregulators.com. For
further information refer to: EZH and EZHSO Series
Pressure Reducing Regulators Instruction
Manual, D103077X012.
P.E.D. Categories
This product may be used as a pressure accessory
with pressure equipment in the following Pressure
Equipment Directive 97/23/EC categories. It may
also be used outside of the Pressure Equipment
Directive using sound engineering practice (SEP) per
table below.
TYPE
PRODUCT SIZE
BODY MATERIAL
CATEGORY
EZH
DN 25, 50, 80 and 100 /
NPS 1, 2, 3 and 4
WCC Steel
IV
EZHSO
DN 25, 50 and 80 /
NPS 1, 2 and 3
WCC Steel
IV
EZHOSX
DN 25, 50, 80 and 100 /
NPS 1, 2, 3 and 4
LCC Steel
IV
EZHSO-OSX
DN 25, 50 and 80 /
NPS 1, 2 and 3
LCC Steel
IV
Specifications
Available Configurations
Type EZH (Spring-to-Close):
Pilot-operated
pressure reducing regulator for low to high
outlet pressure
Type EZHSO (Spring-to-Open):
Pilot-operated
pressure reducing regulator for low to high
outlet pressure
Type EZHOSX:
Type EZH with a Type OS2
slam-shut device for overpressure (OPSO) or
overpressure and underpressure
(OPSO/UPSO) protection
Type EZHSO-OSX:
Type EZHSO with a
Type OS2 slam-shut device for overpressure
(OPSO) or overpressure and underpressure
(OPSO/UPSO) protection
Body Sizes, End Connection Styles and
Pressure Ratings
(1)
See Table 1
Maximum Inlet and Outlet (Casing) Pressures
(1)
103 bar / 1500 psig
Maximum Emergency (Design Casing Pressure)
(1)
103 bar / 1500 psig
Maximum Operating Differential Pressure
(1)(4)
Main Valve:
103 bar d / 1500 psid
Pilot:
Between loading pressure in pilot and
loading sense pressure:
85.0 bar d / 1233 psid
Outlet Pressure
See Table 2
Minimum Differential Pressures
(1)(2)
SERIES
MAIN VALVE
BODY SIZE
MINIMUM DIFFERENTIAL
For 90% Capacity
For 100% Capacity
DN
NPS
bar d
psid
bar d
psid
EZH
25
1
1.1
15.2
1.1
15.7
50
2
0.83
12.0
0.95
13.8
80
3
0.73
10.6
0.88
12.8
100
4
1.1
15.8
1.1
16.4
EZHSO
25
1
3.8
55
3.8
55
50
2
80
3
100
4
Pressure Registration
External
Pilot Connections
1/4 NPT
Temperature Capabilities
(1)
Nitrile (NBR) Version:
-29 to 82ºC / -20 to 180ºF
Fluorocarbon (FKM) Version:
-18 to 82ºC / 0 to 180ºF
(3)
Polyurethane (PU) Version:
DN 25 to 50 / NPS 1 to 2 Sizes:
-30 to 82°C / -22 to 180°F
DN 80 to 100 / NPS 3 to 4 Sizes:
-20 to 82°C / -4 to 180°F
Installation
!
WARNING
Only qualified personnel shall install
or service a regulator. Regulators
should be installed, operated and
maintained in accordance with
international and applicable codes
and regulations and Emerson Process
Management Regulator Technologies,
Inc. instructions.
If the regulator vents fluid or a
leak develops in the system, it
indicates that service is required.
Failure to take the regulator out of
service immediately may create a
hazardous condition.
Personal injury, equipment damage
or leakage due to escaping fluid
or bursting of pressure containing
parts may result if this regulator is
1. The pressure/temperature limits in this Installation Guide and any applicable standard or code limitation should not be exceeded.
2. When using a Type SA/2 pilot supply filter regulator, the differential pressure across the regulator must be a least 3.1 bar d / 45 psid for optimum regulator performance.
3. Types PRX and SA/2 Fluorocarbon (FKM) elastomer is limited to -18°C / 0°F.
4. Maximum Operating Differential Pressure is 96.5 bar d / 1400 psid for DN 25 / NPS 1 EZHSO Series.
