Specifications - Emerson EZH Instruction Manual

Type EZH Relief

Specifications

Ratings and specifications for the Type EZH are listed in the Specifications section below. Specifications for specific relief
valve or backpressure regulator constructions are stamped on a nameplate attached to either the main actuator or the pilot
spring case.
Body Sizes, End Connection Styles and
Pressure ratings
(1)
See Table 1
Maximum inlet and Outlet (Casing) Pressures
1500 psig / 103 bar
Maximum Emergency (Design Casing Pressure)
1500 psig / 103 bar
Maximum Operating Differential Pressure
Main Valve: 1500 psid / 103 bar d
Pilot (Between loading pressure in pilot and
loading sense pressure): 1233 psid / 85.0 bar d
Set Pressure ranges
See Table 2
Minimum Differential Pressures
Main VaLVE
BODy SiZE
TyPE
nPS Dn
1 25
2 50
3 80
EZH
4 100
6, 8, 150, 200,
12 x 6 300 x 150
1. The pressure/temperature limits in this Instructional Manual and any applicable standard or code limitation should not be exceeded.
2. Type PRX Fluorocarbon (FKM) elastomer is limited to 0°F / -18°C.
Main VaLVE BODy SiZE
nPS Dn
1 and 2 25 and 50
25, 50, 80, 100,
1, 2, 3, 4, 6,
150, 300 x 150
12 x 6 and 8
and 200
rELiEF SET
PiLOT
PrESSUrE rangE
TyPE
psig
29 to 116
PRX/182 73 to 290 5.0 to 20.0
217 to 609 15.0 to 42.0
PRX-AP/182 435 to 1160 30.0 to 80.0
2
(1)
(1)
(1)
(1)
MiniMUM DiFFErEnTiaL
For 90% Capacity For 100% Capacity
psid bar d psid
15.2 1.1 15.7
12.0 0.83 13.8
10.6 0.73 12.8
15.8 1.1 16.4
- - - - - - - - 14.0
Table 1. Main Valve Body Sizes, End Connection Styles and Body Ratings
Main VaLVE BODy MaTEriaL
LCC or WCC Steel
LCC or WCC Steel
Table 2. Relief Set Pressure Ranges
Part number
bar
2.0 to 8.0 M0255220X12
M0255200X12
M0255190X12
M0273790X12
Pressure registration
External
Pilot Connections
1/4 NPT
Temperature Capabilities
nitrile (nBr) Version:
-20 to 180ºF / -29 to 82ºC
Fluorocarbon (FKM) Version:
0 to 180ºF / -18 to 82ºC
Polyurethane (PU) Version:
NPS 1, 2, 6, 8, 12 x 6 / DN 25, 50, 150, 200,
300 x 150 Sizes:
-22 to 180ºF / -30 to 82ºC
NPS 3 to 4 / DN 80 to 100 Sizes:
-4 to 180ºF / -20 to 82ºC
Option
Travel Indicator
bar d
1.1
0.95
0.88
1.1
0.97
EnD COnnECTiOn STyLE
NPT or SWE
CL150 RF
CL300 RF
CL600 RF or BWE
PiLOT COnTrOL inFOrMaTiOn
Wire Diameter
Color
in. mm
Black 0.157 4.00
Gold 0.217 5.50
Red 0.256 6.50
Clear 0.335 8.50
(1)
(2)
STrUCTUraL DESign raTing
psig
1500
290
750
1500
Maximum Emergency
Free Length
Pressure
in. mm psig
2.16 55
2.01 51 1480
1.97 50
3.94 100 1480
bar
103
20.0
51.7
103
bar
102
102