Emerson Fisher MR98 Series - Page 2

2
MR98 Series AD2000 Compliant
D-A-CH Region Only
Specications
This section lists the specications for the MR98 Series Regulators. Factory specication such as type, maximum
inlet pressure, maximum temperature, maximum outlet pressure, spring range, orice size and seat material are
stamped on the nameplate fastened on the regulator at the factory.
1. The pressure/temperature limits in this Instruction Manual and any applicable standard limitation should not be exceeded.
2. Pressure and/or the body end connection may decrease the maximum temperatures.
Available Constructions
Type MR98H: Backpressure regulator/relief valve
for spring settings range from 5 to 200 psig /
0.34 to 13.8 bar.
Type MR98HH: Backpressure regulator/relief
valve for spring settings range from 150 to
375 psig / 10.3 to 25.9 bar.
Body and Orice Sizes
1/2 in. / DN 15: 0.416 in. / 10.56 mm
3/4 and 1 in. / DN 20 and 25:
0.631 in. / 16.02 mm
1-1/2 and 2 in. / DN 40 and 50:
1.142 in. / 29 mm
Body End Connections
See Tables 1
Set Pressure Ranges
(1)
See Table 2
Maximum Cold Working Pressures of Body Size
and Materials
(1)
See Table 3
Maximum Inlet, Outlet and Spring Case
Pressure Ratings
(1)
See Table 3
Maximum Temperature Ranges of Diaphragm, Seat,
Trim and Body Materials
(1)(2)
See Table 4
Flow Coe󰀩cients
IEC Sizing Coe󰀩cients
Pressure Registration
Internal or External
Shuto󰀨 Classication Per ANSI/FCI 70-3-2004
Metal Seats: Class IV
Polytetrauoroethylene (PTFE): Class IV
Elastomer Seats: Class VI or better
Sour Gas Service Capability
Optional materials are available for applications
handling sour gases. These constructions comply
with the recommendations of NACE International
Standards MR0175-2002, NACE MR0103 and/or
NACE MR0175/ISO 15156.
API 614 Compliant
Steel or Stainless steel constructions with
Stainless steel trim meet API 614 Requirements.
Approximate Weights
MR98H Series:
1/2 in. / DN 15: 10 lbs / 4.5 kg
3/4 and 1 in. / DN 20 and 25: 22 lbs / 10 kg
1-1/2 and 2 in. / DN 40 and 50: 55 lbs / 25 kg
BODY SIZE
C
v
C
g
C
1
NPS DN
1/2 15 3.4 120 35.3
3/4 and 1 20 and 25 6.5 250 38.5
1-1/2 and 2 40 and 50 20.0 780 39.0
BODY SIZE
X
T
F
d
F
L
K
m
NPS DN
1/2 15 0.787 0.78 0.94 0.88
3/4 and 1 20 and 25 0.935 0.70 0.91 0.83
1-1/2 and 2 40 and 50 0.961 0.69 0.94 0.88