Data Sheet
Bulletin 71.2:299H
9
Table 4. Type VSX-2 High and Low Trip Pressure Ranges
Table 3. Flow Coefcients
TYPE
ORIFICE DIAMETER WIDE-OPEN REGULATING
(1)
C
1
WHEN ∆P < 10 psi /
0.69 bar
C
1
WHEN ∆P > 10 psi /
0.69 bar
Inch mm
C
g
C
v
C
g
C
v
299H / 299HR
1/4 x 3/8
3/8
1/2
3/4
7/8
1
1-3/16
6.4 x 9.5
9.5
13
19
22
25
30
53
117
203
437
544
725
910
2.0
4.2
7.0
14.1
16.5
20.7
25.3
50
115
200
430
534
710
885
1.9
4.0
6.9
13.9
16.2
20.3
24.6
26
30
30
32
34
36
37
26
28
28
30
32
34
35
299HS /
299HSR
1/4 x 3/8
3/8
1/2
3/4
6.4 x 9.5
9.5
13
19
53
117
184
421
2.0
4.1
5.0
11.9
50
115
180
415
1.9
4.0
4.9
11.7
26
30
38
36
26
28
36
35
1. For external/dual registration only.
RANGE
SLAM-SHUT
REGISTRATION
FOR USE WITH MAIN VALVE
SPRING RANGE
MINIMUM TO MAXIMUM
TRIP PRESSURE
TYPE VSX-2
SPRING PART
NUMBER
SPRING FREE
LENGTH
SPRING WIRE
DIAMETER
Inch w.c.
mbar Inch w.c. mbar
Inch mm Inch mm
High
Pressure
Trip
Internal or
External
3.5 to 6 9 to 15
12 to 25 30 to 62 T14162T0012 3.15 80.0 0.07 1.70
5 to 9 12 to 22
3.5 to 6 9 to 15
20 to 52 50 to 129 T14163T0012 3.15 80.0 0.08 2.03
5 to 9 12 to 22
7 to 20 17 to 50
7 to 20 17 to 50
1.4 to 3.9 psig 97 to 269 T14164T0012 3.15 80.0 0.09 2.31
16 to 40 40 to 99
16 to 40 40 to 99
3.8 to 8.7 psig 262 to 600 T14165T0012 3.15 80.0 0.12 3.051 to 3.25 psig 69 mbar to 0.22 bar
2.75 to 6 psig 0.19 to 0.41 bar
2.75 to 6 psig 0.19 to 0.41 bar
5.8 to 16 psig 400 to 1103 T14166T0012 3.15 80.0 0.14 3.51
5 to 16 psig 0.34 to 1.1 bar
5 to 16 psig 0.34 to 1.1 bar 11.6 to 23 psig 800 to 1586 T14167T0012 3.15 80.0 0.17 4.32
Low
Pressure
Trip
External
5 to 9 12 to 22
2 to 12 5 to 30 T14168T0012 3.15 80.0 0.04 1.09
7 to 20 17 to 50
7 to 20 17 to 50
4 to 30 10 to 75 T14169T0012 3.15 80.0 0.06 1.40
16 to 40 40 to 99
1 to 3.25 psig 69 mbar to 0.22 bar
0.36 to 2.3 psig 25 to 159 T14170T0012 3.15 80.0 0.07 1.70
2.75 to 6 psig 0.19 to 0.41 bar
2.75 to 6 psig 0.19 to 0.41 bar
1.5 to 10.8 psig 103 to 745 T14171T0012 3.15 80.0 0.13 3.17
5 to 16 psig 0.34 to 1.1 bar
Low
Pressure
Trip
Internal
5 to 9
(1)
12 to 22
(1)
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
7 to 20
(1)
17 to 50
(1)
7 to 20
(1)
17 to 50
(1)
16 to 40
(1)
40 to 99
(1)
1 to 3.25 psig
(2)
69 mbar to 0.22 bar
(2)
70% of regulator
setpoint to 2.3 psig
70% of regulator
setpoint to 159 mbar
T14170T0012 3.15 80.0 0.07 1.70
2.75 to 6 psig
(2)
0.19 to 0.41 bar
(2)
2.75 to 6 psig
(2)
0.19 to 0.4 1 bar
(2)
70% of regulator
setpoint to 10.8 psig
70% of regulator
setpoint to 745 mbar
T14171T0012 3.15 80.0 0.13 3.17
5 to 16 psig
(3)
0.34 to 1.1 bar
(3)
75% of regulator
setpoint to 10.8 psig
75% of regulator
setpoint to 745 mbar
T14171T0012 3.15 80.0 0.13 3.17
1. Low Pressure Trip cannot be used with this main valve spring range for an internally registered Type VSX-2 to provide underpressure shutoff under owing conditions. If protection against
loss of inlet pressure is the only required function for the Type VSX-2 then an internally registered Type VSX-2 may be used with the same minimum trip pressures as an externally
registered Type VSX-2.
2. 70% of regulator setpoint is the minimum allowable Low Pressure Trip setting for an internally registered Type VSX-2 used with this main valve spring range. If protection against loss of inlet
pressure is the only required function for the Type VSX-2 then an internally registered Type VSX-2 may be used with the same minimum trip pressures as an externally registered
Type VSX-2.
3. 75% of regulator setpoint is the minimum allowable Low Pressure Trip setting for an internally registered VSX-2 used with this main valve spring range. If protection against loss of inlet
pressure is the only required function for the Type VSX-2 then an internally registered Type VSX-2 may be used with the same minimum trip pressures as an externally registered
Type VSX-2.
Note: Other spring combinations are available. Please contact your local Sales Ofce for additional information.