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Data Sheet

ManualsBrandsEmerson ManualsOther627F
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Bulletin 71.2:627F
4
ORIFICE SIZE
ALLOWABLE INLET PRESSURE RANGE FOR MAINTAINING OUTLET PRESSURE WITHIN
±1% OF THE ABSOLUTE OUTLET PRESSURE SETTING
(1)
5 psig / 0.34 bar 30 psig / 2.1 bar 40 psig / 2.8 bar 60 psig / 4.1 bar 100 psig / 6.9 bar
Inches mm psig bar psig bar psig bar psig bar psig bar
3/8x1/8
3/8x1/4
3/8
1/2
9.5x3.2
9.5x6.4
9.5
13
30 to 250
30 to 250
30 to 250
25 to 125
2.1 to 17.2
2.1 to 17.2
2.1 to 17.2
1.7to8.6
55 to 250
55 to 250
55 to 250
50 to 125
3.8to17.2
3.8to17.2
3.8to17.2
3.4to8.6
65 to 250
65 to 250
65 to 250
60 to 125
4.5 to 17.2
4.5 to 17.2
4.5 to 17.2
4.1to8.6
85to250
85to250
85to250
80to125
5.9 to 17.2
5.9 to 17.2
5.9 to 17.2
5.5to8.6
125 to 250
125 to 250
125 to 250
120 to 125
8.6to17.2
8.6to17.2
8.6to17.2
8.3to8.6
1.Forbestperformance,outletpressuresettingshouldbemadeusinganinletpressurethatismidwaybetweenthehighestandlowestexpectedinletpressure.
Table 3.AdditionalSpecications
ORIFICE SIZE MAXIMUM INLET PRESSURE MAXIMUM PRESSURE DIFFERENTIAL
Inches mm psig bar psi bar
3/8x1/8
3/8x1/4
3/8
1/2
9.5x3.2
9.5x6.4
9.5
13
250
250
250
125
17.2
17.2
17.2
8.6
250
250
250
125
17.2
17.2
17.2
8.6
Table 2. Maximum Allowable Inlet Pressures and Pressure Differential
Table 5. IECSizingCoefcients
PILOT TYPE
OUTLET PRESSURE RANGE
PILOT CONTROL SPRING INFORMATION
Part Number Color Code
Wire Diameter Free Length
psig bar
Inches mm Inches mm
6351F
5 to 35
35 to 100
0.34 to 2.4
2.4 to 6.9
1B788327022
1K748527022
Unpainted
Red
0.142
0.192
3.61
4.88
2.13
2.19
54.1
55.6
Table 1. Outlet Pressure Ranges
ORIFICE SIZE
3/4 NPT BODY NPS 1 / DN 25 BODY NPS 2 / DN 50 BODY
Wide-Open Wide-Open
C
1
Wide-Open Wide-Open
C
1
Wide-Open Wide-Open
C
1
Inches mm C
g
C
v
C
g
C
v
C
g
C
v
3/8x1/8 9.5x3.2 12.5 0.43 29.1 12.5 0.43 29.4 12.5 0.43 29.2
3/8x1/4 9.5x6.4 50 1.63 30.6 50 1.71 29.3 52 1.66 31.3
3/8 9.5 108 2.99 36.1 108 3.42 31.6 115 3.39 33.9
1/2 13 190 4.87 39.0 190 5.29 35.9 200 5.01 39.9
ORIFICE SIZE X
T
F
D
F
L
Inches mm 3/4 NPT body NPS 1 / DN 25 body NPS 2 / DN 50 body
1/8 3.2 0.54 0.55 0.54
0.50
0.79
1/4 6.4 0.59 0.54 0.62 0.87
3/8 9.5 0.82 0.63 0.73 0.89
1/2 13 0.96 0.82 1.01 0.86
Table 4.FlowCoefcients