Type EZR
2
(1)(2)
See Table 1
(1)
See Table 10
See Table 3
1500 psig (103 bar)
See Table 2
0.37-inch (9,4 mm)
0.68-inch (17 mm)
0.98-inch (25 mm)
1.19-inch (30 mm)
1.5-inch (38 mm)
1.75-inch (44 mm)
(1)
See Tables 4 and 10
See Table 2
(1)
See Table 8
External
• Integral Slam-Shut Device
• Pre-piped Pilot Supply and Pilot Bleed
• Travel Indicator
• Inlet Strainer
• Type 252 Pilot Supply Filter
• Trim Package
• Restricted Capacity Trim
• Pilot Diaphragm for Pressure Loading
• Quick Disconnect Union in Pilot Mounting
(1)
RATInG
(2)
2 x 1, 2, 3, 4, and 6
(50 x 25, 50, 80, 100, and 150)
Cast iron
NPT (NPS 2 x 1 and 2
(DN 50 x 25 and 50) only)
400 psig (27,6 bar)
CL125 FF 200 psig (13,8 bar)
CL250 RF 500 psig (34,5 bar)
1, 1-1/4 x 1
(3)
, 2 x 1, 2, 3, 4,
6 x 4
(4)
, 8 x 4
(4)
, 6, 8 x 6
(4)
, and 12 x 6
(4)
(25, 32 x 25, 50 x 25, 50, 80,
100,150 x 100, 200 x 100, 150,
200 x 150, and 300 x 150)
WCC Steel
NPT or SWE (NPS 1, 2 x 1, and 2
(DN 25, 50 x 25, and 50) only)
1500 psig (103 bar)
CL150 RF 290 psig (20,0 bar)
CL300 RF 750 psig (51,7 bar)
CL600 RF or BWE 1500 psig (103 bar)
8 (200) LCC Steel
CL150 RF 290 psig (20,0 bar)
CL300 RF 750 psig (51,7 bar)
CL600 RF 1500 psig (103 bar)
1. Ratings and end connections for other than ASME standard can usually be provided. Contact your local Sales Ofce for assistance.
2. See Tables 3, 8, 10, and 11 for diaphragm materials and additional pressure ratings.
3. Available in steel NPT only.
4. NPS 6 x 4, 8 x 4, 8 x 6, 12 x 6 (DN 150 x 100, 200 x 100, 200 x 150, 300 x 150) Types EZR and 399 bodies are not the same as the EW valve bodies and are not interchangeable.
Table 1. Main Valve Body Sizes, End Connection Styles, and Body Ratings
Specications for the Type EZR regulator are shown
above. The control spring range for the pilot is marked
on the spring case of 161EB Series pilots and on the
nameplate of 161AY and PRX Series pilots. Other
information for the main valve appears on the nameplate.
As long as the outlet (control) pressure is above the
outlet pressure setting, the pilot valve plug or disk
remains closed (Figure 2). Force from the main
spring, in addition to inlet pressure bleeding through
the Type 112 restrictor (the restrictor is integral in the
PRX Series pilots), provides downward loading
pressure to keep the main valve diaphragm and plug
assembly tightly shutoff.
When the outlet pressure decreases below the pilot
outlet pressure setting, the pilot plug or disk assembly
opens. Loading pressure bleeds downstream through
the pilot faster than it can be replaced through the
Type 112 restrictor. This reduces loading pressure
on top of the main valve diaphragm and plug
assembly. The force imbalance on the diaphragm
allows the inlet pressure to overcome the loading
pressure and main spring force and open the
Type EZR diaphragm and plug assembly.
1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
2. End connections for other than ASME standard can usually be provided, contact your local Sales Ofce for assistance.
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