Types 627W and 627WH
3
Table 1.
Maximum Spring and Diaphragm Casing Pressure
(1)
MAXIMUM PRESSURE DESCRIPTION
DIAPHRAGM
CASING STYLE
TYPE 627W
TYPE 627WH
bar
psig
bar
psig
Maximum pressure to spring and diaphragm casings to prevent leak to atmosphere
(internal parts damage may occur)
Ductile iron
17.2
250
- - - -
Steel or Stainless steel
17.2
250
55.2
800
Maximum pressure to spring and diaphragm casings to prevent burst of casings during
abnormal operation (leak to atmosphere and internal parts damage may occur)
Ductile iron
32.1
465
- - - -
Steel or Stainless steel
103
1500
103
1500
Maximum diaphragm casing overpressure (above setpoint) to prevent damage to internal parts.
All materials
4.1
60
8.3
120
1. If the spring case is pressurized, a metal adjusting screw cap is required. Contact your Local Sales Office for details.
Figure 1.
Type 627W Regulator Assembly
34B7395
APPLY LUBRICANT
APPLY LUBRICANT
Table 2.
Maximum Inlet Pressure, Differential Pressure and Outlet Pressure Ranges
TYPE
OUTLET PRESSURE
RANGE AND COLOR, bar / psig
ORIFICE SIZE
MAXIMUM INLET PRESSURE
MAXIMUM DIFFERENTIAL PRESSURE
Elastomer Disk
Nylon Disk
Elastomer Disk
Nylon Disk
mm
In.
bar
psig
bar
psig
bar
psig
bar
psig
627W
0.69 to 1.4 / 10 to 20,
Yellow
6.4
1/4
15.2
220
29.0
420
13.8
200
27.6
400
13
1/2
15.2
220
17.2
250
13.8
200
17.2
250
1.0 to 2.8 / 15 to 40,
Green
6.4
1/4
16.5
240
30.3
440
13.8
200
27.6
400
13
1/2
16.5
240
20.7
300
13.8
200
20.7
300
2.4 to 5.5 / 35 to 80,
Blue
6.4
1/4
19.3
280
33.1
480
13.8
200
27.6
400
13
1/2
19.3
280
33.1
480
13.8
200
27.6
400
4.8 to 10.3 / 70 to 150,
Red
6.4
1/4
24.1
350
37.9
550
13.8
200
27.6
400
13
1/2
24.1
350
37.9
550
13.8
200
27.6
400
627WH
9.7 to 17.2 / 140 to 250,
Blue
6.4
1/4
31.0
450
44.8
650
13.8
200
27.6
400
13
1/2
31.0
450
34.5
500
13.8
200
17.2
250
16.5 to 34.5 / 240 to 500,
Red
6.4
1/4
48.3
700
62.1
900
13.8
200
27.6
400
13
1/2
48.3
700
51.7
750
13.8
200
17.2
250
Figure 2.
Type 627WH Regulator Assembly
37B9752
36
33
30
31
24
37
23
46
19
15
14
17
16
11
12
10
13
9
2
1
8
45
44
5
18
35
34
32
29
36
33
30
24
37
23
46
19
15
14
17
16
11
12
10
13
9
2
1
8
45
44
5
50
18
51
52
29
32
34
35
