Type LR125
6
Table 3.
Outlet (Control) Pressure Ranges
PILOT
OUTLET PRESSURE RANGE
SPRING WIRE DIAMETER
SPRING FREE LENGTH
SPRING PART NUMBER
AND COLOR
psig
bar
In.
mm
In.
mm
Type MR95H
15 to 30
25 to 75
70 to 150
1.0 to 2.1
1.7 to 5.2
4.8 to 10.3
0.207
0.234
0.283
5.26
5.94
7.19
2.50
2.60
2.44
63.5
65.9
62.0
ERCA04288A0, Yellow
ERAA01910A0, Green
ERAA01911A0, Red
Type MR95HP
15 to 100
80 to 400
1.0 to 6.9
5.5 to 27.6
0.281
0.375
7.14
9.53
2.50
2.60
63.5
63.5
ERCA04294A0, Unpainted
ERCA04293A0, Unpainted
Table 4.
Diaphragm Material Selection Information
CRITERIA
DIAPHRAGM MATERIAL
17E68
Nitrile
(NBR) (S
tandard)
17E97 Nitrile
(NBR)
17E88 F
luorocarbon
(FKM)
Liquid Temperature
-20 to 150°F / -29 to 66°C
0 to 150°F / -18 to 66°C
0 to 250°F / -18 to 121°C
(1)(2)
General Applications
Best for low pressure differential service
or cold temperature applications
Best for abrasive or erosive service
applications
Best for high temperature applications
Heavy Particle Erosion
Fair
Excellent
Good
1. Fluorocarbon (FKM) is limited to 200°F / 93°C in hot water.
2. For differential pressures above 400 psig / 28 bar diaphragm temperature is limited to 150°F / 66°C.
Table 5.
Main Valve Maximum Pressure Ratings, Diaphragm Selection Information and Main Spring Selection
(1)
BODY SIZE
DIAPHRAGM MATERIAL
MAXIMUM OPERATING
INLET PRESSURE
(4)
MAXIMUM OPERATING
DIFFERENTIAL PRESSURE
(3)(4)
MAXIMUM EMERGENCY INLET
AND DIFFERENTIAL PRESSURE
MAIN SPRING COLOR
In.
DN
psig
bar
psig
bar
psid
bar d
1
25
17E68 Nitrile (NBR)
300
20.7
300
20.7
300
20.7
Black and Yellow
17E97 Nitrile (NBR)
300
20.7
300
20.7
300
20.7
Black and Yellow
600
41.4
600
41.4
600
41.4
Black and White
(2)
17E88
Fluorocarbon (FKM)
300
20.7
300
20.7
300
20.7
Black and Yellow
600
41.4
500
34
600
41.4
Black and White
(2)
2
50
17E68 Nitrile (NBR)
300
20.7
300
20.7
300
20.7
Green and White
17E97 Nitrile (NBR)
300
20.7
300
20.7
300
20.7
Green and White
600
41.4
600
41.4
600
41.4
Red
(2)
17E88
Fluorocarbon (FKM)
300
20.7
300
20.7
300
20.7
Green and White
600
41.4
500
34
600
41.4
Red
(2)
3
80
17E68 Nitrile (NBR)
300
20.7
300
20.7
300
20.7
Light Blue and White
17E97 Nitrile (NBR)
300
20.7
300
20.7
300
20.7
Light Blue and White
600
41.4
600
41.4
600
41.4
Black and White
(2)
17E88
Fluorocarbon (FKM)
300
20.7
300
20.7
300
20.7
Light Blue and White
600
41.4
500
34
600
41.4
Black and White
(2)
4
100
17E68 Nitrile (NBR)
300
20.7
300
20.7
300
20.7
Green and White
17E97 Nitrile (NBR)
300
20.7
300
20.7
300
20.7
Green and White
600
41.4
600
41.4
600
41.4
Red and White
(2)
17E88
Fluorocarbon (FKM)
300
20.7
300
20.7
300
20.7
Green and White
600
41.4
500
34
600
41.4
Red and White
(2)
1. See Table 1 for main valve structural design ratings and Table 2 for pilot ratings.
2. The black and white, red and red and white springs are only recommended for applications where the maximum inlet pressure can exceed 300 psig / 20.7 bar.
3. Maximum differential pressures may be lower for applications where cavitation may be present.
4. These are recommendations that provide the best regulator performance for a typical application. Please contact your local Sales Office for further information if a deviation from the standard
recommendations are required.
Table 6.
Main Valve Minimum Differential Pressures
(1)
MAIN VALVE
BODY SIZE
MAIN SPRING PART NUMBER AND COLOR
DIAPHRAGM
MATERIAL
MINIMUM DIFFERENTIAL, PERCENT OF CAPACITY
For 90% Capacity
For 100% Capacity
In..
DN
psid
bar d
psid
bar d
1
25
GE12727X022, Black and Yellow
17E68 and 17E88
30
2.1
30
2.1
17E97
35
2.5
35
2.5
19B2401X022, Black and White
17E88 and 17E97
43
3.0
43
3.0
2
50
18B2126X022, Green and White
17E68 and 17E88
18
1.2
19
1.3
17E97
24
1.7
24
1.7
18B5955X012, Red
17E88 and 17E97
29
2.0
31
2.1
3
80
19B0781X022, Light Blue and White
17E68 and 17E88
21
1.5
28
1.9
17E97
23
1.6
23
1.6
19B0782X022, Black and White
17E88 and 17E97
32
2.2
38
2.6
4
100
18B8501X022, Green and White
17E68 and 17E88
16
1.1
30
2.1
17E97
16
1.1
34
2.3
18B8502X022, Red and White
17E88 and 17E97
21
1.5
40
2.8
1. See Table 1 for structural design ratings and Table 2 for pilot rating.
