Fisher EMERSON VSX4 Series User manual
VSX4 and VSX8 Series Controller
!
WARNING
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion
personal injury or death.
Fisher®controller must be installed,
operated and maintained in accordance
with federal, state and local codes, rules
or service the VSX4 and VSX8 Series
controller. If a leak develops or if the
to the unit may be required. Failure
to correct trouble could result in a
hazardous condition.
Installation, operation and maintenance
personnel may result in improper
adjustment and unsafe operations which
personal injury.
Figure 1. VSX4 and VSX8 Series Controller
Introduction
Scope of the Manual
This Instruction Manual provides installation,
adjustment, maintenance and parts ordering
information for the VSX4 and VSX8 Series controller.
Instructions for other equipment used with the
controller, such as pressure regulators, can be found
in separate instruction manuals.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . .5
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Startup and Shutdown. . . . . . . . . . . . . . . . . . . . . . . . .8
Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Controller Spring Adjustment. . . . . . . . . . . . . . . . . . . .8
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
VSX4 and VSX8 Series
Instruction Manual
Form 5867
January 2015
D103127X012
The VSX4 and VSX8 Series controller are designed to
shut off the ow of gas to the downstream system in the
event of outlet pressure rising above or falling below the
predened levels.
• The VSX4 and VSX8 Series can be integrated in
a slam-shut Type VS100 installed upstream of the
associated regulator.
• The VSX4 and VSX8 Series controller are
equipped with an integral and automatic bypass.
The Specications section lists the specications for the VSX4 and VSX8 Series controller. The following information
is stamped on the nameplate of VSX4 and VSX8 Series: Type and Class, Maximum Outlet Pressure and Spring
Range. Additional operating information is located on the Regulator nameplate.
1. The pressure/temperature limits in this Instruction Manual or any applicable standard limitation should not be exceeded.
Low-pressure
controller which can be integrated into a regulator;
with 10 to 1100 mbar / 0.15 to 16 psig downstream
pressure and with either internal or external
pressure registration for the regulator.
High-pressure
controller which can be integrated into a
regulator; with 1100 to 4000 mbar / 16 to 58 psig
downstream pressure and with either internal or
external pressure registration for the regulator.
Differential Strength
Integral Strength
Functional Class
Min, Min and Max Installation
Max Installation Only
Connections
1/4 NPT
1/4 NPT
20.0 bar / 290 psig
6.0 bar / 87 psig
d
6.0 bar / 87 psig
umax
16.0 bar / 232 psig
6.0 bar / 87 psig
24 mm / 0.94 in.
39 mm / 1.54 in.
-20 to 66°C / -4 to 150°F
-30 to 66°C / -22 to 150°F
Aluminum
a
< 1 second
Manually after Fault Rectication
Extended stem visible in center of reset button
Internal or External
EN 14382
1.4 kg / 3.1 lbs
1.5 kg / 3.2 lbs
Options
• Wire Seal -The VSX4 and VSX8 Series can
be ordered with an optional tamper-proof lock
wire to preclude unauthorized access to the
adjustment springs.
• (inductive contact available only
on Type VSX8) - An optional remote notication
switch can be installed offering the capability to
remotely notify the operator should Type VSX8
shuttoff occur.
• The VSX4 and VSX8 Series controller can be
mounted on various types of Emerson™ regulator.
It can also be mounted as a stand alone slam-shut
valve mounted in a Type VS100 body.
• The VSX4 and VSX8 Series offer either internal or
external pressure sensing line, depending on the
regulator type and/or the specied conditions.
Pu– Pu
2– 4
2
ΔP =
2
Q
1.05 x Cg
VSX4 and VSX8 Series
2
Figure 2. EN 14382-VSX4/VSX8 Series Label
Std: EN14382
SLAM-SHUT
PED mfg: Gallardon,
France
Pumax
Max IN
CLASS
TYPE
VSX8L VSX8H
VSX4L VSX4H
IS PS 6 bar Pumax 6 bar PSD 6 bar
DS PS 20 bar Pumax 16 bar PSD 6 bar
RELAIS
RELAY
Pdmax
Max OUT
MATL
CASE
Wdso
OP range
Alum
Pressure range following
service condition
IS 6 bar
DS 16 bar
LP 1.5 bar
HP 5.5 bar
PSD
Wdsu
UP range
AMin, Min and
Max installation
BMax installation
only
VSX8L
VSX4L VSX4H
IS 6 bar
DS 16 bar
LP 1.5 bar
HP 5.5 bar
IS PS 6 bar Pumax 6 bar PSD 6 bar
DS PS 20 bar Pumax 16 bar PSD 6 bar Pressure range following
service condition
AMin, Min and
Max installation
BMax installation
only
Minimum Nominal Maximum
mbar mbar mbar
10 0.15
20 0.29
30 0.44
VSX4L,
VSX8L
30 to 60 mbar / 12 to 25 in. w.c. GF02168X012
> 30 0.44
35 0.51
50 0.73 40 to 110 mbar / 16 to 43 in. w.c. GF02169X012
> 50 0.73
60 0.87 80 1.16 60 to 190 mbar / 25 to 75 in. w.c. GF02170X012
> 80 1.16 100 1.45 130 1.89 95 to 280 mbar / 1.4 to 4.1 psig GF02171X012
> 130 1.89 160 2.32 250 3.63 140 to 500 mbar / 2.0 to 7.3 psig GF02172X012
> 250 3.63
300 4.35
400 5.80
> 400 5.80
500 7.25
700 10.2 400 to 1450 mbar / 5.8 to 21.0 psig GF04353X012
> 700 10.2
1000 14.5
1100 16.0
> 1100 16.0 1250 18.1 1500 21.8
VSX4H
0.90 bar to 3.0 bar / 13.1 to 43.5 psig GF02173X012
> 1500 21.8 2000 29.0 2500 36.3 1.6 to 5.5 bar / 23.2 to 79.8 psig GF04353X012
> 2500 36.3 3000 43.5 4000 58.0
1. OPSO spring range for OPSO installation only.
2. When selecting OPSO set points, the outlet pressure rating of the regulator should be considered.
Table 1. VSX4 and VSX8 Series Overpressure Shutoff (OPSO) Spring Ranges
Table 2A. VSX4 and VSX8 Series Combined Overpressure and Underpressure Shutoff (OPSO and UPSO) Spring Ranges
for Types CSB404, CSB604 and CSB704
Minimum Maximum
Factory Set Factory Set
mbar mbar mbar mbar mbar mbar mbar
17 0.25 24 0.35
20 0.29
VSX4L,
VSX8L
5 to
30
0.07 to
0.44
10 0.15
30 to
60
0.4 to
0.9
43 0.62
ERAA05835AO
White
GF02167X012
Black
21 0.3 11 0.26 45 0.65
24 0.35 35 0.51
27 0.39 14 0.2 51 0.74
30 0.44 15 0.22 57 0.83
35 0.5 18 0.26
50 to
130
0.7 to
1.9
67 1
GF02168X012
Brown
35 0.51 60 0.87
50 0.7
10 to
75
0.15 to
1.1
25 0.36 90 1.3
T14169T0012
Blue
60 0.87 30 0.44 108 1.57
54 0.78 100 1.5
75 1.1 38 0.54 95 to
270
1.4 to
3.9
128 1.85 GF02169X012
Red
100 1.5 50 0.73 170 2.47
100 1.5 160 2.3
150 2.2 25 to
159
0.36 to
2.3
75 1.1 150 to
380
2.2 to
5.5
248 3.6 T14170T0012
Silver
GF02170X012
Orange
160 2.3 80 1.2 264 3.83
160 2.3 300 4.4 300 4.4
100 to
500
1.5 to
7.3
150 2.2 260 to
600
3.8 to
8.7 450 6.53
FA142869X12
Orange Stripe
GF02171X012
Pink
276 4 517 7.5 500 7.3 250 3.6 400 to
1100
5.8 to
16 700 10.2 GF02172X012
Green
500 7.3 1000 14.5 1000 14.5 100 to
750
1.5 to
10.9 500 7.3 800 to
1600
11.6 to
23.2 1320 19.2 T14171T0012
Olive
GF02173X012
Silver
1000 14.5 3000 43.5
1200 17.4
VSX4H,
VSX8H
500 to
2000
7.3 to
29
600 8.7 1100 to
2000
16 to
29 1600 23.2
FA142869X12
Orange Stripe
GF02171X012
Pink
1500 21.6 750 10.9 1700 to
3700
24.7 to
53.7
1900 27.6 GF02172X012
Green
2000 29 1000 14.5 2400 34.8
3000 43.5 500 to
2800
7.3 to
40.6
1500 21.8 2800 to
5500
40.6 to
79.8
3400 49.3 T14171T0012
Olive
GF02173X012
Silver
4000 58 2000 29 4400 63.8
VSX4 and VSX8 Series
3
mbar mm In. mm In.
UPSO /
Minimum Springs
VSX4L, VSX8L
ERAA05835A0 5 to 30 2 to 12 in. w.c. White 1.1 0.043 80.0 3.15
T14169T0012 10 to 75 4 to 30 in. w.c. Blue 1.4 0.055 80.0 3.15
T14170T0012 25 to 160 0.36 to 2.3 Silver 1.7 0.067 80.0 3.15
FA142869X12 100 to 500 1.5 to 7.3 Orange Stripe 2.4 0.094 80.0 3.15
T14171T0012 100 to 750 1.5 to 10.9 Olive 3.2 0.125 80.0 3.15
VSX4H, VSX8H
FA142869X12 0.50 to 2.0 bar 7.3 to 29.0 Orange Stripe 2.4 0.094 80.0 3.15
T14171T0012 0.50 to 2.8 bar 7.3 to 40.7 Olive 3.2 0.125 80.0 3.15
OPSO /
Maximum Springs
VSX4L, VSX8L
GF02167X012 41 to 44(1) 16 to 18 in. w.c.(1) Black 1.5 0.059 70.0 2.75
GF02168X012
40 to 72(1) 16 to 29 in. w.c.(1)
Brown 1.8 0.071 70.0 2.75
30 to 60(2) 12 to 25 in. w.c.(2)
GF02169X012
50 to 122(1) 0.73 to 1.8(1)
Red 2.2 0.087 70.0 2.75
40 to 110(2) 16 to 43 in. w.c.(2)
GF02170X012
83 to 220(1) 1.2 to 3.2(1)
Orange 2.6 0.102 70.0 2.75
60 to 190(2) 25 to 75 in. w.c.(2)
GF02171X012
180 to 384(1) 2.6 to 5.6(1)
Pink 3.0 0.118 70.0 2.75
60 to 190(2) 25 to 75 in. w.c.(2)
GF02172X012
240 to 563(1) 3.5 to 8.2(1)
Green 3.4 0.134 70.0 2.75
95 to 280(2) 1.4 to 4.1(2)
GF02173X012 460 to 932(1) 6.7 to 13.5(1) Silver 4.0 0.157 70.0 2.75
GF04353X012 400 to 1450(2) 5.8 to 21.0(2) Yellow 4.8 0.189 70.0 2.75
VSX4H, VSX8H
GF02171X012 1.05 to 1.57 bar(1) 15.2 to 22.8(1) Pink 3.0 0.118 70.0 2.75
GF02172X012 1.25 to 2.30 bar(1) 18.1 to 33.4(1) Green 3.4 0.134 70.0 2.75
GF02173X012
2.10 to 3.75(1) 30.5 to 54.4(1)
Silver 4.0 0.157 70.0 2.75
0.90 to 3(2) 13.1 to 43.5(2)
GF04353X012 1.5 to 5.5(2) 21.8 to 79.8(2) Yellow 4.8 0.189 70.0 2.75
1. OPSO spring range for the combined OPSO and UPSO installation.
2. OPSO spring range for OPSO installation only.
Table 4. Controller Spring Part Numbers and Characteristics
d d
d
d
AGmin 30 15
10 5
AGmax 10 10
Note: Stable inlet pressure AGmin = AG 10 (Pd< 60 mbar / 0.87 psig) and AG 5 (Pd> 60 mbar / 0.87 psig), AGmax = AG 5
Table 3. Controller Accuracy in Accordance to EN 14382
Minimum Maximum
and Color
mbar In. w.c. mbar In. w.c. mbar In. w.c. mbar In. w.c.
14
20
25
5.5
8
10
21
30
40
8.5
12
16
VSX8L
5 to 30 2 to 12 42 to 69 17 to 28 ERAA05835A0
White
GF02168X012
Brown
35
69
14
1 psig
75
170
30
2.5 psig 25 to 160 0.36 to 2.3 psig 90 to 214 1.3 to 3.1 psig T14170T0012
Silver
GF02170X012
Orange
100
170
345
1.5 psig
2.5 psig
5 psig
240
380
690
3.5 psig
5.5 psig
10 psig
100 to 500 1.5 to 7.3 psig 186 to 379 2.7 to 5.5 psig FA142869X12
Orange Stripe
GF02171X012
Pink
Table 2B. Type VSX8L Combined Overpressure and Underpressure Shutoff (OPSO and UPSO) Spring Ranges for Type CS804
VSX4 and VSX8 Series
4
VSX4 and VSX8 Series Controller
The pressure measuring element of the controller
consists of a diaphragm that senses downstream
pressure. The downstream pressure is controlled
by the regulator. The top side of the diaphragm
encounters the force imposed by the overpressure
shut-off spring and underpressure shut-off spring.
When the downstream pressure increases above the
Overpressure Shutoff (OPSO) setting, the diaphragm
moves up.
When the downstream pressure decreases below the
Underpressure Shutoff (UPSO) setting, the diaphragm
moves down.
Both of these actions result in the rotation of the cam
and the release of the reset pin.
The valve plug spring moves the valve plug against
the regulator port, stopping the ow of gas. The reset
button is then used to reset (relatch) the controller
(refer to the Resetting Procedure section for detailed
resetting instructions).
Standard downstream pressure registration for the
controller is external; however, internal sensing line is
made available by removing the downstream sense
blocking screw, installing a 1/4 NPT plug in the control
line port and removing the downstream control line.
CAM
d
u
b
M1141
Figure 3. Type VSX8 Operational Schematic
VSX4 and VSX8 Series
5
Installation
!
WARNING
result if this controller is installed, without
appropriate overpressure protection,
where service conditions could exceed the
instruction manuals.
All vents should be kept open to permit
downward to allow condensate to drain.
with proper operation.
Controller installations should
be adequately protected from
an explosion hazard. In these cases, the
Failure to install a downstream control
line could result in a hazardous condition.
controller when construction uses external
controller will not control pressure or
shut off if a downstream control line is not
installed on those constructions where
If the controller is exposed to an
overpressure condition, it should be
occurred. Controller operation within
debris in the pipeline.
General Installation Instructions
Note
rotated 360° for easy installation
and maintenance.
• Install according to EN 12186 and EN 12279.
Before proceeding to installation:
• Ensure that the controller is compatible with the
gas being regulated.
• Check for damage that might have occurred
during shipment.
• Check for and remove any dirt or foreign material
that may have accumulated in the regulator or
controller body.
• Blow out any debris or dirt in the tubing and
the pipeline.
• Ensure that the external or internal sense orice
is clean.
• Apply pipe compound to the external threads of the
pipeline before installing the controller.
• Verify that:
- Equipment limits of utilization (PS, TS)
correspond to the desired operating conditions.
- The inlet is protected by an appropriate device(s)
to avoid exceeding the allowable limits (PS, TS).
- The controller and its springs correspond
to the desired operating conditions of
associated regulator.
/ Maximum / Maximum
Pd< 35 / 0.51 Pdx 0.5 Pdx 2.0 Pdx 2.0 + 10 mbar / 0.145 psig
35 / 0.51 < = Pd< 60 / 0.87 Pdx 0.5 Pdx 1.7 Pdx 1.7 + 10 mbar / 0.145 psig
60 / 0.87 < = Pd< 160 / 2.32 Pdx 0.6 Pdx 1.5 Pdx 1.5 + 10 mbar / 0.145 psig
160 / 2.32 < = Pd< 180 / 2.61 Pdx 0.7 Pdx 1.4 Pdx 1.4 + 10 mbar / 0.145 psig
180 / 2.61 < = Pd< 300 / 4.35 Pdx 0.7 Pdx 1.4 - - - -
300 / 4.35 < = PdPdx 0.7 Pdx 1.3
The VSX4 Series assembly part number (without valve plug and controller springs): LP: GE35589X012, HP: GE35590X012
The VSX8 Series assembly part number (without valve plug and controller springs): LP: ERCA02667A0, HP: ERCA02668A0
1. Regulator without relief valve (or with relief valve set above controller setting).
2. When selecting OPSO set points, the outlet pressure rating of the regulator should be considered.
3. Regulator with relief valve (set below controller setting).
Table 5. Controller Standard Factory Settings
VSX4 and VSX8 Series
6
Figure 4. Controller External Dimensions
mm / IN.
Figure 5. Typical Installation
ud
4 x
RESET TRIP CLEARANCE: 25 / 1
REMOVAL CLEARANCE: 45 / 1.8
SPRING REMOVAL
CLEARANCE 80 / 3.1
146 / 5.8
Ø 118 / 4.6
28 / 1.1
147 / 5.8
RESET TRIP CLEARANCE: 20 / 0.8
REMOVAL CLEARANCE: 35 / 1.4
SPRING REMOVAL
CLEARANCE 80 / 3.1
146 / 5.8
28 / 1.1
155 / 6.1
Ø 118 / 4.6
VSX4 and VSX8 Series
7
Startup and Shutdown
in conjunction with the instruction
manual of the associated equipment.
!
WARNING
All interventions on the equipment
should only be performed by competent
and trained personnel.
!
WARNING
ensure upstream and downstream valves
• Using a athead screwdriver, turn the OPSO adjusting
screw (key 43) clockwise until it stops turning.
• Apply nominal outlet pressure of the associated
regulator to the downstream system. Refer to
Figure 5.
• Reset the controller per the resetting procedure
(refer to the Resetting Procedure section for detailed
resetting instructions).
• Slowly decrease the downstream pressure to the
desired UPSO value (Pdsu).
• With a screwdriver, turn the UPSO adjusting screw
clockwise (key 40) until the controller trips.
• Apply nominal outlet pressure of the associated
regulator to the downstream system.
• Reset the controller by pulling the reset button
(key 30) until the mechanism is latched.
• Slowly increase the downstream pressure to the
desired OPSO shutoff value (Pdso).
• With a screwdriver, turn the OPSO adjusting screw
counterclockwise (key 43) until the controller trips.
• Using a athead screwdriver, completely remove
and discard the UPSO adjusting screw (key 40) by
turning it counterclockwise.
• Remove and discard the UPSO spring (key 38)
and the mini washer (key 103).
• Using a athead screwdriver, turn the OPSO
adjusting screw (key 43) clockwise until it
stops turning.
• Apply nominal outlet pressure of the associated
regulator to the downstream system.
• Reset the controller per the resetting procedure,
(Refer to the Resetting Procedure section for
detailed resetting instructions).
• Slowly increase the downstream pressure to the
desired OPSO value (Pdso).
• Using a athead screwdriver, turn the OPSO
adjusting screw counterclockwise (key 43) until the
controller trips.
• Using a athead screwdriver, turn the OPSO
adjusting screw (key 43) clockwise until it
stops turning.
• Apply nominal outlet pressure of the associated
regulator to the downstream system, then reset
the controller per the resetting procedure (refer
to the Resetting Procedure section for detailed
resetting instructions).
• Slowly decrease the downstream pressure to the
desired UPSO value (Pdsu).
• With a screwdriver, turn the UPSO adjusting screw
clockwise (key 40) until the controller trips.
• When assembling piping and anges, do not apply
excessive force to the body, bolts, O-rings, anges
or ttings. All connections should be compatible
with the geometry and working conditions of
the pipeline.
• If needed, a support may be used under the piping
and regulator/controller body to avoid excessive
pressure force on the regulator/controller.
• Connect downstream control line tubing to the
1/4 NPT connection in the lower casing and to the
downstream pipe respecting a minimum distance of
four times its diameter (see Figure 5).
• Periodically check all vent openings to be sure that
they are not plugged.
VSX4 and VSX8 Series
8
Using a screwdriver, press the manual shut-off button
(key 23) to manually trip the controller.
VSX4 and VSX8 Series
Step 1:
• To properly reset the controller after it has been
tripped to the closed position, a at-head screwdriver
must be inserted into the position shown in Figure 8
on the backside of the reset button (key 30,
Figure 8).
Step 2:
• The screwdriver should be slowly rotated to
gradually pull the reset button (key 30) away from
the controller. This slow movement allows for a slow
bleed of the pressure across the controller’s disk
and seat area. The operator should be able to hear
the pressure bleeding through the system.
Step 3:
• When the pressure has equalized and the air
bleeding sound has dissipated, the reset button
(key 30) should be pulled completely away from
the controller by hand until the internal shut-off
mechanism has been re-latched.
Step 4:
• Once the operator feels the click of the re-latch
occurring, the reset button (key 30) should be
pushed completely back into its original position.
The travel indicator (key 27) provides a visual
indication as to whether the controller is opened
(latched/reset) or closed (tripped).
When the controller is in the open position, the travel
indicator (key 27) is visible and rm when pressed with
a nger.
When the controller is in the closed position, the travel
indicator (key 27) is not visible and easily moved when
pressed inward with a nger.
Maintenance
!
WARNING
may perform maintenance procedures.
If necessary, contact your local Sales
Failure to test the controller for proper
shutoff can result in a hazardous
per applicable federal, state and local
occur from external sources, the
controller should be inspected and
of inspection and replacement depends
on the severity of service conditions and
accordance with applicable National or
recommendations, all hazards covered
also be covered after every subsequent
reassembly at installation site, in order
to ensure that the equipment will be safe
controller should be tested for both under
and overpressure shutoff activation and
intervals not to exceed 15 months but
at least once each calendar year. If the
controller does not close at the desired
repair and/or replace the controller.
and replacement of worn parts, the
controller should be disassembled every
3 years minimum.
VSX4 and VSX8 Series
9
Figure 6. Controller Manual Shut-off Button (key 23)
Figure 7. Controller Manual Bypass
Figure 8. Controller Bypass with Screwdriver
VSX4 And VSX8 Series
47
30
47
30
VSX4 and VSX8 Series
10
Figure 12. Controller in Closed (Tripped) Position
Figure 9. Relatching the Controller Mechanism
30
Figure 10. Repositioning the Reset Button
Figure 11. Controller in Open (Reset) Position
VSX4 and VSX8 Series
11
Note
Replacement as described below.
All other internal disassembly requires
at the factory; for example the cam and
!
WARNING
maintenance or disassembly without
internal pressure.
• Refer to Figure 13 when following this procedure.
Remove the body ange screws (key 34) and the
two half anges (key 36). Remove the controller
from the body. If disk replacement is required,
remove the fastening ring (key 44). A specic tool is
required for this, see Table 7.
• Remove and replace the valve plug (disk)
(key 47, D24 mm medium capacity or D39 mm
high capacity).
• Replace the fastening ring (key 44).
• Reassemble in reverse order, taking care to
follow the steps outlined in the General Controller
Reassembly Procedures section.
!
WARNING
maintenance or disassembly without
internal pressure.
• Refer to Figure 13 when following this procedure.
Remove the body ange screws (key 34) and the
two half anges (key 36). Remove the controller
from the body.
• Install the sense blocking screw (key 51) and
O-ring (key 50).
• Remove the 1/4 NPT plug from the 1/4 NPT Control
line port (Figure 3).
• Reassemble in reverse order, ensure to follow
the steps outlined in the General Controller
Reassembly Procedures section.
• Connect a downstream control line with an outer
diameter of 6.4 mm / 0.25 in. or larger to the 1/4 NPT
Control line port shown in Figure 3 and to the
downstream system as indicated in Figure 5.
• Refer to Figure 13 when following this procedure.
Unscrew and remove the closing cap (key 3). Using
a athead screwdriver, unscrew and remove the
OPSO adjusting screw (key 43), OPSO spring
(key 41), maximum washer (key 42).
• Unscrew and remove the UPSO adjusting screw
(key 40), mini washer (key 103) and UPSO
spring (key 38).
Supply pressure through outlet purge valve. Open the purge valve.
Check the value of the shut-off pressure and for any downstream leakage. Check the value of the shut-off pressure and for any downstream leakage.
Adjust the setpoint, if necessary. Adjust the setpoint, if necessary.
Table 6. Flow Chart for Checking Shut-off Mechanism
VSX4 and VSX8 Series
12
Flathead screwdriver • Adjustment of Overpressure and Underpressure Shutoff (OPSO / UPSO) setting
• Resetting procedure
10 mm / 0.394 in. Wrench
• Removal and installation of the actuator screws (key 16, Figure 13)
• Removal and installation of body ange screws (key 34)
• Removal and installation of the lock nut (key 31, Figure 13)
14 mm / 0.551 in. Wrench • Removal and installation of the external sense line 1/4 NPT connection (Figure 3)
Internal retaining ring pliers • Removal and installation of the fastening ring (key 44)
Table 7. Recommended Tools
If the valve will not close Operating fault
Check the following:
• The shut-off pressure settings for high and low pressure values are correct.
• The O-rings are tight shut.
• The sensing line is plugged.
Remove the controller and check the following:
• The reset latch is not stuck.
• The state of the diaphragm assembly for wear and tear.
Or contact your local Sales Ofce.
If the downstream pressure in the controller decreases External leak Locate and seal the leak.
Or contact your local Sales Ofce.
If the outlet pressure in the controller is constant - - - - • Bleed off the outlet side of the regulator.
• Observe the evolution of the outlet pressure (check tightness).
If the downstream pressure in the controller increases Internal leak
Check the following:
• The valve plug (disk)
• The internal interface O-ring (key 46, Figure 14)
• The reset stem O-ring (key 29, Figure 14)
Or contact your local Sales Ofce.
Table 8. VSX4 and VSX8 Series Troubleshooting
• Using a 10 mm / 0.394 in. wrench, unscrew and
remove the eight spring case screws (key 16)
and associated nuts (key 12) and then remove
the spring case (key 2). For Type VSX4H,
remove the diaphragm support (key 32).
• To remove the diaphragm assembly, gently grasp
the edge of the diaphragm (key 6) while at the
same time pulling the reset button (key 30) slightly,
which will allow for sliding the back plate (key 5) off
of the cam (key 19).
Grasp the back plate (key 5) and unscrew the
nut (key 31) using a 10 mm / 0.394 in. wrench.
Remove the diaphragm plate (key 7) and inspect
the diaphragm and replace if necessary. The
lock nut (key 31) should always be replaced.
Reassemble in reverse order, ensure to follow
steps outlined in the following section “General
Controller Reassembly Procedures.” Note that
when tightening the lock nut (key 31) onto screw
(key 16), a hexagonal recess exists at the bottom
of the back plate (key 5) that precludes the screw
(key 16) from turning to allow the lock nut (key 31)
to be threaded.
General Controller
• It is recommended that O-rings (keys 14 and 24)
be replaced before reinstalling the controller valve
onto the regulator body.
• Before reassembly, inspect removed O-rings for
damage or wear and replace if necessary.
• Before reassembly, apply silicone grease lubricant
to the appropriate O-rings.
• Using graphite molybdenum, grease appropriate
screws, setting nuts and springs (keys 38, 40, 41,
43 and 103).
• Recommended torque for screws (key 16) is
6.0 N•m / 4.4 ft-lbs.
• Recommended torque for lock nut (key 31) is
3 N•m / 27 in-lbs.
VSX4 and VSX8 Series
13
1 Lower case GF01865X012 ERCA00875A0
2 Upper case GF01866X012
3 Closing cap GF01922X012
4 Reset pin GF01936X012 ERAA06343A0
5 Back plate GF01926X012
6* Diaphragm GF01929X012
7* Diaphragm plate GF01927X012 GF01944X012 GF01927X012
8 Valve plug spring GF02174X012 ERAA06243A0
9 Plug support GF01939X012 ERAA05874A0
10 Spring locator GF01938X012 ERCA01265A0
11 Fastening clip of reset pin (4 required) FA406150X12
12 Nut H M6 (8 required) GE38209X012
13 Ring (2 required) GF01932X012
14* Closing Cap O-ring (51.00 x 3.00) GF03448X012
15 Self-locking ring FA406200X12
16* Screw H M6 x 16 (8 for the spring case and 1 for the diaphragm assembly) GE38207X012
17 Connection ring (not shown) GF01937X012 - - - - - - - - - - -
18 Axis GF01935X012
19 Cam ERCA00252A0
20 Screw HM4 x 8 (2 required) GF03474X012
21 Flexing spring GF04808X012
22 Fastening clip FA406153X12
23 Manual button GF01933X012
24 O-ring (2 required) GF03445X012
25 Relatching spring GF02175X012
26 Gland sleeve GF01931X012 ERAA05855A0
27 Travel indicator diaphragm GF01928X012
28 O-ring R8 (8.90 x 2.70) (3 required for VSX4 Series, 2 required for VSX8 Series) GF03446X012
29 O-ring R1 (2.60 x 1.90) (2 required) GF03447X012
30 Reset button GF01930X012 ERCA01254A0,
ERCA01044A0(2)
31* Lock nut FA404550X12
32 Diaphragm support(1) (not shown) - - - - - - - - - - - GF01934X012 - - - - - - - - - - -
33* Inlet O-ring 8073 (36.0 x 2.2) GF03442X012
34 Screw H M6x12 (not shown) (4 required) GE38176X012
36 Half ange (not shown) (2 required) GF01942X012
38 UPSO Spring See Table 2
40 UPSO Adjusting screw ERAA05947A0
41 OPSO Spring See Tables 1 and 2
42 Maximum washer GF01925X012
43 OPSO Adjusting screw GF01923X012
44 Fastening ring (not shown) GF04079X012 - - - - - - - - - - -
46* Outlet O-ring I 5370 (54.0 x 2.0) GF03443X012
47* VSX4 Series Valve plug D24/Disk (Medium capacity) GF01940X012 - - - - - - - - - - -
47* VSX8 Series Valve plug D39/Disk (High capacity) - - - - - - - - - - - ERAA05852A0
48 Vent 27A5516X012
49 Plug, 1/4 NPT (not shown) (for Internal only) 1C333528992
50* Sense blocking O-ring (2.00 x 1.25) (for External only) GF03449X012
51 Sense Blocking Screw (for External only) GF02261X012
52 Limit switch - - - - - - - - - - - M4006669X12(2)
53 Travel stop - - - - - - - - - - - ERAA05924A0
54 Positioner ERCA01078A0(2)
58 Safety nut M4 - - - - - - - - - - - ERAA05875A0
80 Base label - - - - - - - - - - -
81 O-ring (1.15 x 1.00) (not shown) (4 required) GF03444X012 - - - - - - - - - - -
83 Lockwire T14088T0012
84 Slamshut label - - - - - - - - - - -
93 O-ring R8 (10.82 x 1.78) - - - - - - - - - - - ERCA02550A0
96 Nut M (2.5 x 0.45) - - - - - - - - - - - ERCA01387A0
102 Ring Guide - - - - - - - - - - - ERAA05861A0
103 Mini Washer (for UPSO spring) ERAA05957A0
104 Maxi Seat ERAA05956A0
1. When adjusting the controller, refer to the Controller Spring Range tables, Tables 1 and 2, to ensure the desired set value is achievable for the controller construction, either low
pressure (Type VSX4L or VSX8L) or high pressure (Type VSX4H).
2. Applicable for Type VSX8 with remote trip sensor.
*Recommended Spare Part
VSX4 and VSX8 Series Controller
Controller that have been disassembled for repair
must be tested for proper operation before being
returned to service.
The type number, pressure ranges, functional
class and date of manufacture are stamped on the
nameplate. Always provide this information when
corresponding with your local Sales Ofce regarding
replacement parts or technical assistance.
When ordering replacement parts, refer to the key
number of each needed part as found in the parts list.
Separate kits containing all recommended spare parts
are available. See tables on pages 15 and 16.
VSX4 and VSX8 Series
14
Figure 13. Controller Assembly
ERCA02667
Qty Code
50 1 197898 Sense blocking O-ring (2.00 x 1.25) (for external only) GF03449X012
51 1 Sense blocking screw (for external only) GF02261X012
6 1 197899 Diaphragm GF01929X012
31 1 Lock nut FA404550X12
7 1
197900
Diaphragm plate - - - - - - - - - - - GF01944X012
32 1 Diaphragm support - - - - - - - - - - - GF01934X012
14 1 Closing cap O-ring GF03448X012
31 1 Lock nut FA404550X12
+ spring according to setpoint -- not included in the kit
7 1
197901
Diaphragm plate GF01927X012 - - - - - - - - - - -
14 1 Closing cap O-ring GF03448X012
31 1 Lock nut FA404550X12
+ spring according to setpoint -- not included in the kit
L1
L2 3
14
80
84
48
104
42
7
6
12
102
28
29
27
26 18 413 28 29 46 8
33
1
47
58
53
9
10
15
51
50
21
19
16
5
24
31
16
2
43
40
103
41
38
L2
L2 L2 L2
L2
L1
L1
L1
L1
L2
23
24
25
22
20
21
L2
L1 L1 L1 L1
L1
L1
L2
L2
L2
A
30
96
A
93
L1
L1
L2 3
14
80
84
48
104
42
7
6
12
102
28
29
27
26 18 413 28 29 46 8
33
1
47
58
53
9
10
15
51
50
21
19
16
5
24
31
16
2
43
40
103
41
38
L2
L2 L2 L2
L2
L1
L1
L1
L1
L2
23
24
25
22
20
21
L2
L1 L1 L1 L1
L1
L1
L2
L2
L2
A
30
96
A
93
L1
m /
m /
m /
m /
m /
m /
m /
m /
1. Lubricants and adhesive must be selected such that they meet the temperature requirements.
VSX4 and VSX8 Series
15
continued
Qty Code
6 1
RVSX4MCX012
Diaphragm GF01929X012
14 1 Closing cap O-ring GF03448X012
24 1 Diaphragm Assembly O-ring GF03445X012
31 1 Lock nut FA404550X12
33 1 Inlet O-ring GF03442X012
46 1 Outlet O-ring GF03443X012
47 1 Medium Capacity Disk GF01940X012
6 1
RVSX8X00012
Diaphragm GF01929X012
14 1 Closing cap O-ring GF03448X012
24 1 Diaphragm Assembly O-ring GF03445X012
31 1 Lock nut FA404550X12
33 1 Inlet O-ring GF03442X012
46 1 Outlet O-ring GF03443X012
47 1 High Capacity Disk ERAA05852A0
VSX4 and VSX8 Series
©Emerson Process Management Regulator Technologies, Inc., 2009, 2015; All Rights Reserved
USA - Headquarters
McKinney, Texas 75070 USA
Tel: +1 800 558 5853
Outside U.S. +1 972 548 3574
Asia-Paci c
Shanghai 201206, China
Tel: +86 21 2892 9000
Europe
Bologna 40013, Italy
Tel: +39 051 419 0611
Middle East and Africa
Dubai, United Arab Emirates
Tel: +971 4811 8100
USA - Headquarters
McKinney, Texas 75070 USA
Tel: +1 800 558 5853
Outside U.S. +1 972 548 3574
Asia-Paci c
Singapore 128461, Singapore
Tel: +65 6770 8337
Europe
Bologna 40013, Italy
Tel: +39 051 419 0611
Chartres 28008, France
Tel: +33 2 37 33 47 00
Middle East and Africa
Dubai, United Arab Emirates
Tel: +971 4811 8100
USA - Headquarters
Elk River, Minnesota 55330-2445, USA
Tels: +1 763 241 3238
+1 800 447 1250
Europe
Selmsdorf 23923, Germany
Tel: +49 38823 31 287
Asia-Paci c
Shanghai 201206, China
Tel: +86 21 2892 9499
The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Fisher is a mark owned by Fisher Controls International LLC,
a business of Emerson Process Management.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or
guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specifi cations of such
products at any time without notice.
Emerson Process Management Regulator Technologies, Inc. does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and
maintenance of any Emerson Process Management Regulator Technologies, Inc. product remains solely with the purchaser.
For further information visit www.emersonprocess.com/regulators
The distinctive swirl pattern cast into every actuator
casing uniquely identifi es the regulator as part of the
Fisher®brand Commercial Service Regulator family
and assures you of the highest-quality engineering,
performance, and support traditionally associated
with Fisher®, Tartarini™, and Francel™ regulators.
Visit www.fishercommercialservice.com to access
interactive applications.
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