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GE Oil & Gas
Plug and
seat ring
No. 9
Plug and
seat ring
No. 8
Plug and
seat ring
No. 7
Plug and
seat ring
No. 6
Plug and
seat ring
No. 5
Plug and
seat ring
No. 4
Plug and
seat ring
No. 3
Plug and
seat ring
No. 2
Plug and
seat ring
No. 1
Plug and
seat ring
No. 0
VariPak
28001
Cv 0.004
Cv 0.010
Cv 0.010
Cv 0.050
Cv 0.10
Cv 0.25
Cv 0.60
Cv 0.2
Cv 2.3
Cv 3.8
VariPak
28002
Cv 0.004
to 0.0016
Cv 0.010
to 0.004
Cv 0.010
to 0.004
Cv 0.050
to 0.010
Cv 0.10
to 0.04
Cv 0.25
to 0.10
Cv 0.60 to
0.25
Cv 1.2 to
0.9
Cv 2.3 to
0.9
Cv 3.8 to
1.5
Orifice Dia.
2 mm
3f
3d
3e
Orifice Dia.
1.6 mm
Orifice Dia.
4.5 mm
Orifice Dia.
9.5 mm
Orifice Dia.
14.3 mm
3c
3b
3a
2.2.2 Changing the plug and seat ring combination
The plug and seat ring combination can be changed
very easily for trim Nos. 1 to 9 inclusive. Simply replace
the following parts:
- The plug and seat ring (see figures 1 and 2 to select
the combination required for the new Cv).
- The Cv adjustment plate (25) in the case of the VariPak
28002 adjustable-Cv valve.
- If necessary, the actuator spring (134) (see figure 3 to
check the spring range corresponding to the new Cv.
Plug/Seat
No.
Flow
Coefficient Cv
Spring Range (134)
Max. Pressure Supply
Adjustable Cv
Single Lever
CI. IV
CI. V
CI. IV
CI. V
m.bar
Psi
Color Code
bar (Psi)
bar (Psi)
bar (Psi)
ATO
ATC
0
3.8 to 1.5
414
-
1660
6-24
Red
2.1 (30)
2.1 (30) 2.1 (30)
2.8
(40)
1
2.3 to 0.9
2
1.2 to 0.5
3
0.6 to 0.25
4
0.25 to 1.10
207
-
1035
3-15
Green
1.4 (20)
1.4 (20) 1.4 (20)
1.7
(25)
5
0.10 to 0.04
6
0.050 to 0.020
7
0.025 to 0.010
8
0.010 to 0.004
9
0.004 to 0.0016
Figure 3 - Actuator spring ranges and supply pressures
