Technical Specifications

6 | 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
C
v
0.004 C
v
0.010 C
v
0.010 C
v
0.050 C
v
0.10 C
v
0.25 C
v
0.60 C
v
0.2 C
v
2.3 C
v
3.8
VariPak
28002
C
v
0.004
to 0.0016
C
v
0.010
to 0.004
C
v
0.010
to 0.004
C
v
0.050
to 0.010
C
v
0.10
to 0.04
C
v
0.25
to 0.10
C
v
0.60 to
0.25
C
v
1.2 to
0.9
C
v
2.3 to
0.9
C
v
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 C
v
).
- The C
v
adjustment plate (25) in the case of the VariPak
28002 adjustable-C
v
valve.
- If necessary, the actuator spring (134) (see figure 3 to
check the spring range corresponding to the new C
v
.
Plug/Seat
No.
Flow
Coefficient C
v
Spring Range (134)
Max. Pressure Supply
Adjustable C
v
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