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3. If the restriction or restriction plug (key 20) was
removed, coat the threads with lubricant and install it.
4. If replacing the stem O-ring (key 37), sparingly apply
lubricant and install the O-ring over the valve plug
(key 4).
5. If removed, install the valve plug (key 4) and valve
spring (key 14) into the diaphragm assembly (key 5).
Install a replacement connector cap O-ring or gasket
(key 36) on the diaphragm assembly and secure with
the connector cap (key 6).
6. Install the diaphragm assembly (key 5) and push down
on it to see if the valve plug (key 4) moves smoothly.
The diaphragm assembly should stroke approximately
1/16 in. / 1.6 mm after the valve plug contacts the port.
In step 7, if installing a control spring of
a different set pressure range, be sure to
remove the set pressure range on the spring
case and indicate the new range.
7. Stack the control spring (key 7), the control spring seat
(key 8) and, if used, the diaphragm limiter (key 40) onto
the diaphragm assembly (key 5). Make sure to install
the diaphragm limiter bevelled side up.
8. Install the spring case (key 2) on the body (key 1) with
the vent assembly (key 16) oriented to prevent clogging
or entrance of moisture. Install the machine screws
(key 17) and tighten in a crisscross pattern, using 5 to
7 ft-lbs / 7 to 9 N•m of torque.
9. Replace the closing cap gasket (key 19) if necessary
install the closing cap (key 12). When all maintenance
is complete, refer to the Startup and Shutdown section
to put the relief valve or backpressure regulator into
operation and adjust the pressure setting.
Parts Ordering
Each Type EZL relief valve or backpressure regulator
is assigned a serial number, which can be found on the
nameplate. Refer to the number when contacting your local
Sales Office for technical information or ordering parts. Also
be sure to include the complete 11-character part number
from the following Parts List.
Parts List
Type EZL Main Valve (Figure 4)
Key
Description
Disk Parts Kits
2 and 3 in. / DN 50 and 80 (includes key numbers: 29, 30 and 34)
4 in. / DN 100 (includes key numbers: 29, 30, 34 and 75)
2 in. / DN 50, Nitrile (NBR) and
Fluorocarbon (FKM)
Note
Part Number
REZL2X00N12
Key
Description
Disk Parts Kits (continued)
2 in. / DN 50, Fluorocarbon (FKM)
3 in. / DN 80, Nitrile (NBR) and
Fluorocarbon (FKM)
3 in. / DN 80, Fluorocarbon (FKM)
4 in. / DN 100, Nitrile (NBR) and
Fluorocarbon (FKM)
4 in. / DN 100, Fluorocarbon (FKM)
Full Repair Kits
2 and 3 in. / DN 50 and 80 (includes key numbers:
4, 7, 8, 9, 12B, 15, 17, 20, 28, 29, 30, 34, 70 and 76)
4 in. / DN 100 (includes key numbers:
4, 7, 8, 9, 12B, 15, 17, 20, 28, 29, 30, 34, 70, 75 and 76)
2 in. / DN 50, Nitrile (NBR) and
Fluorocarbon (FKM)
2 in. / DN 50, Fluorocarbon (FKM)
3 in. / DN 80, Nitrile (NBR) and
Fluorocarbon (FKM)
3 in. / DN 80, Fluorocarbon (FKM)
4 in. / DN 100, Nitrile (NBR) and
Fluorocarbon (FKM)
4 in. / DN 100, Fluorocarbon (FKM)
Travel Indicator Parts Kits
2 in. / DN 50 (includes key numbers:
12B, 53, 54, 55, 56, 57, 58, 70 and 76)
3 and 4 in. / DN 80 and 100 (includes
key numbers: 12B, 53, 54, 55, 56,
57, 58, 70 and 76)
1
Body
2 in. / DN 50
Cast iron
NPT
CL125 FF
Steel
NPT
CL150 RF
Standard
Tapped inlet and outlet
CL300 RF
Standard
Tapped inlet and outlet
CL600 RF
Standard
Tapped inlet and outlet
BWE, Schedule 40
SWE
3 in. / DN 80
Cast iron
CL125 FF
Steel
CL150 RF
Standard
Tapped inlet and outlet
CL300 RF
Standard
Tapped inlet and outlet
CL600 RF
Standard
Tapped inlet and outlet
BWE, Schedule 40
- continued -
Type EZL
Part Number
REZL2X00F12
REZL3X00N12
REZL3X00F12
REZL4X00N12
REZL4X00F12
REZL2X00N22
REZL2X00F22
REZL3X00N22
REZL3X00F22
REZL4X00N22
REZL4X00F22
ERSA01550A0
ERSA01555A0
GE10583X012
GE10585X012
GE10588X012
GE10676X032
14B5834X032
GE10676X012
14B5834X042
GE10679X012
14B5834X052
GE10680X012
GE10682X012
GE10689X012
GE10699X012
14B5835X032
GE10700X012
14B5835X042
GE10701X012
14B5835X052
GE10702X012
9
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