Maintenance; Type Ezr Main Valve Trim Parts; Diaphragm Material Selection Information; Type Ezr Working Monitor Performance - Fisher EZR Instruction Manual

Gas Temperature
(for lower temperatures
contact your local Sales Office)
General Applications
Heavy Particle Erosion
Natural Gas With:
Up to 3% aromatic
hydrocarbon content
(3)
3 to 15% aromatic
hydrocarbon content
(3)
15 to 50% aromatic
hydrocarbon content
(3)
Up to 3% H S (hydrogen
2
sulfide or sour gas)
Up to 3% ketone
Up to 10% alcohol
Up to 3% synthetic lube
1. The NPS 6 (DN 150), 17E97 diaphragm will perform in gas temperatures as low as -20°F (-29°C).
2. For differential pressures above 400 psig (27,6 bar) diaphragm temperature is limited to 150°F (66°C).
3. The aromatic hydrocarbon content is based on percent volume.
Construction Outlet (Control) Pressure Range, psig (bar)
6 to 15-inches w.c.
0.5 to 1.2 psig
Type 161AY or
1.2 to 2.5 psig
161AYM
2.5 to 4.5 psig
4.5 to 7 psig
10 to 40 psig
30 to 75 psig
Type 161EBM
70 to 140 psig
130 to 200 psig
200 to 350 psig
Type 161EB 30 to 300 psig (2,1 to 20,7 bar)
1. Monitor pilot minimum setpoint was determined with a pressure drop ranging from 50 to 150 psig (3,5 to 10,3 bar). Approximately double the minimum monitor pilot setpoint
if the pressure drop is less than 50 psig (3,5 bar).
2. Should only be used as the intermediate pressure reduction pilot on Type EZR worker/monitor systems.

Maintenance

Regulator parts are subject to normal wear and must
be inspected periodically and replaced as necessary.
Due to the care Regulator Technologies takes in
meeting all manufacturing requirements (heat treating,
dimensional tolerances, etc.), use only replacement
parts manufactured or furnished by Regulator
Technologies. Also, when lubrication is required,
use a good quality lubricant and sparingly coat the
recommended part. The frequency of inspection
and parts replacement depends upon the severity of
service conditions, applicable codes and government
regulations, and company inspection procedures.
Table 12 lists various regulator problems and possible
solutions for them.
Table 8. Diaphragm Material Selection Information
17E68
NITRILE (NBR)
-20° to 150°F (-29° to 66°C)
Best for cold temperatures.
Fair
Good
Poor
Not recommended
Good
Fair
Good
Fair
Table 9. Type EZR Working Monitor Performance
MONITORING PILOT
(15 to 37 mbar)
(34 to 83 mbar)
(83 mbar to 0,17 bar)
(0,17 to 0,31 bar)
(0,31 to 0,48 bar)
5 to 15 psig (0,34 to 1,0 bar)
(0,69 to 2,8 bar)
(2,1 to 5,2 bar)
(4,8 to 9,7 bar)
(9,0 to 13,8 bar)
(13,8 to 24,1 bar)
17E97
(1)
NITRILE (NBR)
0° to 150°F (-18° to 66°C)
Best for high pressure conditions, i.e.
transmission service or high pressure
industrial service. It is also the best for
abrasive or erosive service applications.
Excellent
Excellent
Good
Poor
Good
Fair
Good
Fair
MINIMUM PRESSURE OVER NORMAL DISTRIBUTION
PRESSURE AT whICh MONITOR PILOT CAN BE SET
Spring Part Number
1B653927022
1B537027052
1B537127022
1B537227022
1B537327052
17B1260X012
17B1262X012
17B1259X012
17B1261X012
17B1263X012
17B1264X012
15A9258X012

Type EZR Main Valve Trim Parts

Instructions are given for complete disassembly and
assembly. The main valve may remain in the pipeline
during maintenance procedures. Key numbers are
referenced in Figures 14 through 18.
Avoid personal injury or damage to
property from sudden release of pressure
or uncontrolled gas or other process
fluid. Before starting to disassemble,
carefully release all pressures according
to the Shutdown procedure. Use gauges
to monitor inlet and outlet pressures
while releasing these pressures.
Type EZR
17E88
FLUOROCARBON (FKM)
0° to 260°F (-18° to 127°C)
Best for natural gas having aromatic
hydrocarbons. It is also the best for
high temperature applications.
Good
Excellent
Good
Fair
Good
WITH A RESTRIcTOR SETTInG OF 2
1-inch w.c. (2 mbar)
(1)
1-inch w.c. (2 mbar)
(1)
0.5 psig (34 mbar)
(1)
0.5 psig (34 mbar)
(1)
0.5 psig (34 mbar)
(1)
0.5 psig (34 mbar)
(1)
0.5 psig (34 mbar)
(1)
0.6 psig (41 mbar)
(1)
1.3 psig (90 mbar)
(1)
1.5 psig (0,10 bar)
(1)
3 psig (0,21 bar)
(1)
- - - -
(2)
cAUTIOn
(2)
13