Instruction Manual
D102775X012
August 2019
Type ACE95 and Type ACE95Sr Tank
Blanketing Valves
ACE95 Series
W9133 W8155
Figure 1. Type ACE95 Tank Blanketing Valve Figure 2. Type ACE95Sr Tank Blanketing Valve
Introduction
Scope of the Manual
This instruction manual provides installation, startup,
and maintenance procedures for the ACE95 Series
(Type ACE95 and Type ACE95Sr) tank blanketing
valves. See Figures 1 and 2.
Product Description
ACE95 Series tank blanketing valves are self-contained,
balanced, pilot operated and used for accurate pressure
control on gas blanketing systems. These valves
help control emissions and provide protection against
atmospheric contamination. ACE95 Series valves
maintain a positive pressure and thereby reduce
the possibility of tank wall collapse during pump
out operations, in addition to preventing liquid from
vaporizing into the atmosphere.
ACE95 Series
Specifications
The Specifications section on this page provides specifications and ratings for ACE95 Series Tank Blanketing
Valves. Factory specifications are stamped on a nameplate fastened to the upper actuator case of the valve.
Body Sizes and End Connection Styles
Type ACE95
(1)
Angled Body
:
3/4 NPT
1 NPT
NPS 1 / DN 25, CL150 RF
NPS 1 / DN 25, CL300 RF
NPS 1 / DN 25, PN 16/25/40 RF
NPS 1 / DN 25 Sanitary Flange
In-line Body:
3/4 NPT
1 NPT
NPS 1 / DN 25, CL150 RF
NPS 1 / DN 25, CL300 RF
NPS 1 / DN 25, PN 16/25/40 RF
NPS 1 x 2 / DN 25 x 50, CL150 RF
NPS 1 x 2 / DN 25 x 50, PN 16/25/40 RF
NPS 1 / DN 25, Sanitary Flange
Type ACE95Sr
Angled Body
(1)
:
2 NPT
NPS 2 / DN 50, CL150 RF
NPS 2 / DN 50, CL300 RF
Maximum Operating Inlet Pressure
200 psig / 13.8 bar
Maximum Outlet (casing) Pressure
20 psig / 1.4 bar
Maximum Operating Outlet Pressure
1.5 psig / 0.10 bar
Control Pressure Ranges
-5.0 in. w.c. to 1.5 psig / -12 mbar to 0.10 bar
See Table 1
Pressure Registration
External
Accuracy
Typically within 0.5 in. w.c. / 1 mbar when flowing
5 to 70 percent of advertised capacities.
Main Valve Flow Characteristic
Linear
Flow Coefficients for Relief Valve Sizing
Type ACE95 Type ACE95Sr
C
1 use Cv 1.1 Cv 20 use Cv 22
v
C
2 use Cv 2.2 Cv 45 use Cv 50
v
C
4 use Cv 4.4 Cv 60 use Cv 66
v
C
7.5 use Cv 9.25
v
C
10 use Cv 11
v
Material Temperature Capabilities
(2)
Nitrile (NBR): -20 to 180°F / -29 to 82°C
Fluorocarbon (FKM): 0 to 212°F / -18 to 100°C
Ethylenepropylene (EPDM/FDA): -20 to 212°F /
-29 to 100°C
Perfluoroelastomer (FFKM): -20 to 212°F /
-29 to 100°C
Approximate Weights
With all accessories:
Type ACE95: 40 pounds / 18 kg
Type ACE95Sr: 60 pounds / 27 kg
1. Various Single Array Manifold (SAM) tank connections are also available. Contact your local Sales Ofce for more information.
2. Special low temperature constructions for process temperatures between -49 to 104°F / -45 to 40°C are available by request. The low temperature constructions passed Emerson
laboratory testing for lockup and external leakage down to -49°F / -45°C.
Table 1. Control Pressure Ranges
CONTROL PRESSURE RANGE SPRING MATERIAL
-5 to -0.5 in. w.c. / -12 to -1 mbar Stainless Steel
-1 to 1 in. w.c. / -2 to 2 mbar Stainless Steel
0.5 to 5 in. w.c. / 1 to 12 mbar
4 to 10 in. w.c. / 10 to 25 mbar
8 to 15 in. w.c. / 20 to 37 mbar
0.5 to 1.5 psig / 0.03 to 0.10 bar
1. The second spring is located under the diaphragm assembly.
2
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
SPRING FREE LENGTH,
in. / mm
2.75 / 69.9
0.88 / 22.4
2.75 / 69.9
1.60 / 40.6
2.75 / 69.9
2.00 / 50.8
2.00 / 50.8
2.75 / 69.9
(1)
(1)
SPRING WIRE DIAMETER,
in. / mm
0.080 / 2.03
0.085 / 2.16
0.080/ 2,03
0.065 / 1.65
0.080 / 2.03
0.112 / 2.84
0.125 / 3.18
0.225 / 5.72
(1)
(1)
INLET PRESSURE
ATMOSPHERIC PRESSURE
TANK PRESSURE
INLET BLEED PRESSURE
ACE95 Series
RANGE SPRING
ORIFICE
PILOT VALVE (OPEN)
ROLLING DIAPHRAGM
PILOT SPRING
DIAGNOSTIC PORT
INLET PRESSURE
TANK PRESSURE
INLET BLEED PRESSURE
ATMOSPHERIC PRESSURE
Figure 3. ACE95 Series Operational Schematic (Valve Open)
Principle of Operation
ACE95 Series tank blanketing valves are pilot
operated, activated by the diaphragm, and control the
vapor space pressure over a stored liquid. The unit
is controlled by a very large diaphragm actuator. The
oversized actuator offers high sensitivity to changes
in tank pressure. When a storage tank cools and
tank vapors condense, ACE95 Series valves replace
the condensing vapors with an inert gas to prevent
internal tank pressure from decreasing. Positive tank
pressure prevents outside air from contaminating the
product and reduces the possibility of atmospheric
pressure collapsing the tank. As demand is satisfied,
the valve closes.
ACE95 Series valves respond to slight decreases in
internal tank pressure by opening and increasing the
flow rate of inert gas into the tank. When the tank’s
liquid level has been lowered to the desired point and
the vapor pressure setpoint is re-established,
the valve closes.
Installation and Startup
!
WARNING
Personal injury, equipment damage, or
leakage due to escaping accumulated gas
or bursting of pressure-containing parts
may result if this gas blanketing system
is overpressured or installed where
service conditions could exceed the limits
given in the Specifications section and
on the appropriate nameplate, or where
conditions exceed any ratings of the
adjacent piping or piping connections.
To avoid such injury or damage, provide
pressure-relieving or pressure-limiting
devices (as required by Title 49, Part 192,
of the U.S. Code of Federal Regulations,
by the National Fuel Gas Code Title 54 of
the National Fire Codes of the National
Fire Protection Agency, or by other
applicable codes) to prevent service
conditions from exceeding those limits.
SENSING
LINE
3
ACE95 Series
BLANKETING GAS
SUPPLY LINE
LINE STRAINER
SHUTOFF VALVE
SENSING LINE
TANK VENT
BLANKETING
GAS TO TANK
GAS
E0623
Figure 4. ACE95 Series Tank Blanketing Valve Installation
LIQUID
Additionally, physical damage to the
tank blanketing system could result in
personal injury and property damage due
to escaping accumulated gas. To avoid
such injury and damage, install the tank
blanketing valve in a safe location.
This ACE95 Series valve was assembled and preset
to the customer specified pressure and setpoint. The
control pressure range of the valve is stamped on the
nameplate fastened to the upper actuator case. The
gas blanketing setpoint is the only adjustable feature
on this unit.
1. Use qualified personnel when installing, operating
and maintaining valves. Before installing, inspect
the valve and tubing for any shipment damage or
foreign material that may have collected. Make
certain the body interior is clean and the pipelines
are free of foreign material. Apply pipe compound
only to the male pipe threads with a threaded
body or use suitable line gaskets and good bolting
practices with a flanged body.
2. Inspect the nameplate on the upper actuator
case. It displays the model number, serial number,
a blanketing gas supply pressure range and
the maximum inlet pressure and set pressure.
These must agree with the system that you are
blanketing. The serial number will be needed in
any communication with your local Sales Office.
SHUTOFF VALVE
EMERGENCY
TANK VENT
SHUTOFF VALVE
TANK
3. Clean the gas blanketing supply lines of all dirt and
foreign material before connecting them to the
ACE95 Series tank blanketing valve.
4. The valve must be mounted so the actuator case
is horizontal. The valve should be mounted above
the tank. Three connections are required:
a) blanketing gas supply to valve, b) valve outlet to
tank, and c) sensing line to tank.
Piping Considerations
CAUTION
Undersized piping may inadequately
deliver blanketing gas at the specified inlet
pressure under full flow conditions. This
may result in unacceptable performance
under high demand conditions.
Unnecessarily long or restricted outlet
piping may result in poor setpoint control.
Inlet Piping
The blanketing gas supply line should be equipped
with a Number 100 mesh strainer to remove dirt and
pipe scale. Inlet piping must be sized to adequately
deliver blanketing gas at the specified inlet pressure
under full flow conditions.
4
Outlet Piping
Type ACE95 or Type ACE95Sr valve outlet is piped
into the tank vapor space. Outlet piping must be full
size and self-draining to the tank. The valve should be
situated above and as close as possible to the tank
vapor space for best performance.
Sensing Line
The sensing line should be 1/2 in. / 13 mm tubing or
pipe, must slope down toward the tank, and should
not contain low points (or traps) that could catch liquid.
The sensing line must enter the tank above the liquid
level at a point that senses the vapor space pressure
and is free from turbulence associated with tank
nozzles or vents.
Note
Best control is obtained when both
connections to the tank are separate. If
the tank has only one available nozzle,
contact Emerson for alternate methods
of installation. A single array manifold is
available for such situations.
ACE95 Series
ADJUSTING SCREW
(KEY 2)
ACTUATOR CAP
(KEY 1)
SPRING CASE
(KEY 7)
W8160
Figure 5. Spring Case, Adjusting Screw, and Actuator Cap
VENT
(KEY 6)
LOCK NUT
(KEY 3)
Gauges and Shutoff Valves
Inlet gas shutoff valves are desirable for servicing.
If this ACE95 Series tank blanketing valve was not
ordered with an inlet pressure gauge, it is advisable to
install a gauge between the inlet shutoff valve and the
blanketing valve.
Note
Safety considerations may dictate full
port shutoff valves between the tank and
blanketing valve, and at the valve inlet.
Startup, Adjustment, and Shutdown
Note
Tank vents and safety relief valves must
be in place and operating.
CAUTION
Always open the outlet valve before
the inlet valve. Operation in the reverse
order could result in inlet pressure
being applied to the actuator casing,
potentially damaging it.
Startup
1. Open shutoff valves between the blanketing
valve and the tank (both sensing and outlet).
See Figure 4.
2. Slowly open the supply line shutoff valve (to the
blanketing valve) and leave it fully open.
3. Monitor the tank vapor space pressure.
Adjustment
The setpoint of this unit is factory set. If an adjustment
is to be made, it should be done so in small increments
while the unit is supplying gas to the tank. To change
the setpoint:
1. Unscrew and remove the actuator cap (key 1) from
the top of the spring case (key 7). See Figure 5.
2. Loosen the lock nut (key 3) and turn the adjusting
screw (key 2) clockwise to raise the setpoint.
(Turning the screw counter-clockwise lowers
the setpoint.)
3. Observe the effects of the change.
4. When the adjustment is complete, tighten the lock
nut (key 3) and replace the actuator cap (key 1).
5
ACE95 Series
Shutdown
Installation arrangements vary, but in any installation
it is important to open and close valves slowly and to
close the upstream shutoff valve first when shutting
down the system.
Diagnostics
Note
If a diagnostics pressure gauge was not
ordered with the unit, a pressure gauge
must be installed in the diagnostic port
to perform diagnostic analysis.
Diagnostics are an optional feature of the
ACE95 Series Tank Blanketing valves that aid in
evaluating valve operation. The diagnostic analysis
relies on the relationship of pilot pressure and pressure
in the main valve chambers (see Figure 3). The basic
relationships are as follows:
In order to evaluate a valve, examine the valve
nameplate to determine the Cv and inlet pressure
range main valve spring. The inlet pressure gauge
indicates actual pressure supplied to the valve.
Follow these steps and refer to the diagnostics tables
on the following pages to evaluate a valve under
actual operating conditions:
1. Select the Table (Tables 3 through 8) that
corresponds to the C
your valve.
2. Determine the actual valve operating inlet pressure
in the rst column of the diagnostics table.
Table 2. Diagnostic Analysis Pressure Ranges
DIAGNOSTIC
(PRESSURE CHAMBER)
Equal to inlet supply pressure
Slightly below inlet supply pressure
Well below inlet supply pressure
3. In the second column of the table, determine the
pressure of the pilot as it opens.
4. Determine the diagnostic pressure for the start to
open pressure of the main valve in the third column.
and inlet pressure range of
v
STATUS
Pilot and main valves are closed.
Tank at or above set pressure.
Pilot valve supplies gas to tank.
Tank pressure is just below
set pressure.
Pilot and main valves are both
supplying gas to the tank. Tank
pressure is below setpoint.
There are four pressures involved in evaluating a
valve: actual inlet pressure, pressure to start opening
pilot valve, pressure to start opening main valve and
pressure to fully open main valve.
Actual Inlet Pressure: The gas pressure supplied
to the inlet of the valve. This is the maximum
diagnostic pressure.
Pressure to Start Opening Pilot Valve: The
diagnostic pressure drops to this value as the valve
senses decreasing tank pressure. The main valve
remains closed at this pressure.
Pressure to Start Opening Main Valve: The
diagnostic pressure drops to this level as the tank
pressure decreases and reaches the valve setpoint.
The pilot is fully open at this pressure.
Pressure to Fully Open Main Valve: At this point,
both the main valve and pilot valve are fully open and
supplying gas to the tank.
Maintenance
Valve parts are subject to normal wear and must be
inspected and replaced as necessary. The frequency
of inspection and replacement of parts depends on the
severity of service conditions and the requirements
of local, state, and federal regulations. Due to the
care Emerson takes in meeting all manufacturing
requirements, use only replacement parts
manufactured or furnished by Emerson.
All O-rings, gaskets, and seals should be lubricated
with a good grade of general purpose lubricant and
installed gently rather than forced into position.
Suggested lubricant, sealant, and adhesive are
as follows:
Lubricant: Dow Corning® 111 or equivalent
Sealant: Loctite® PST #592,
Polytetrauoroethylene (PTFE) Tape or equivalent
Adhesive: Loctite® #222 or equivalent
Be certain that nameplates are updated to accurately
indicate any field changes in equipment, materials,
service conditions, or pressure settings.
Monthly Maintenance
1. Visually inspect the unit to ensure tight connections,
tight seals, and safe operation.
2. Observe the blanketing pressure.
5. The fourth column displays the diagnostic
pressure for the full open pressure of the main valve.
Dow Corning® is a mark owned by Dow Corning Corp.
Loctite® is a mark owned by Henkel Corporation.
6
3. Inspect the inlet pressure for the proper pressure
range (stamped on the valve nameplate).
ACE95 Series
Table 3. Type ACE95 Diagnostics Table: Cv 1 through 4, Inlet Pressure Range Spring 25 to 50 psig / 1.7 to 3.4 bar
ACTUAL INLET SUPPLY
PRESSURE TO VALVE,
psig / bar
25 / 1.7 24 / 1.7 9 / 0.62 2 / 0.14
30 / 2.1 29 / 2.0 13 / 0.90 6 / 0.41
35 / 2.4 34 / 2.3 16 / 1.1 9 / 0.62
40 / 2.8 39 / 2.7 20 / 1.4 13 / 0.90
45 / 3.1 44 / 3.0 24 / 1.7 17 / 1.2
50 / 3.4 49 / 3.4 28 / 1.9 21 / 1.4
Table 4. Type ACE95 Diagnostics Table: Cv 1 through 4, Inlet Pressure Range Spring 51 to 120 psig / 3.5 to 8.3 bar
ACTUAL INLET SUPPLY
PRESSURE TO VALVE,
psig / bar
51 / 3.5 50 / 3.4 29 / 2.0 5 / 0.35
60 / 4.1 59 / 4.1 36 / 2.5 12 / 0.83
70 / 4.8 69 / 4.8 43 / 3.0 19 / 1.3
80 / 5.5 79 / 5.4 51 / 3.5 27 / 1.9
90 / 6.2 89 / 6.1 59 / 4.1 34 / 2.3
100 / 6.9 99 / 6.8 66 / 4.6 42 / 2.9
110 / 7.6 109 / 7.5 74 / 5.1 50 / 3.4
120 / 8.3 119 / 8.2 81 / 5.6 57 / 3.9
When Pilot Starts to Open,
psig / bar
When Pilot Starts to Open,
psig / bar
DIAGNOSTIC PORT PRESSURE
When Main Valve Starts to Open,
psig / bar
DIAGNOSTIC PORT PRESSURE
When Main Valve Starts to Open,
psig / bar
When Main Valve is Fully Open,
psig / bar
When Main Valve is Fully Open,
psig / bar
Annual Maintenance
1. Visually inspect the unit to ensure tight connections,
tight seals, and safe operation.
2. Observe the blanketing pressure.
3. Inspect the inlet pressure for the proper pressure
range (stamped on the valve nameplate).
4. Visually inspect valve for any external wear.
5. If there is evidence of leakage or unstable internal
motion, a rebuild with seal replacement and
relubrication may be in order.
Disassembly and Assembly
CAUTION
Before removing the valve from the line,
ensure that it is isolated from the gas
supply pressure and that all pressure
has been released from the valve. (The
drain on the inlet filter is convenient
to bleed off gas.) All tank connections
must be closed or sealed in accordance
with your plant’s operating and safety
procedures. If installed, electrical
connections to the explosion proof
switch must be deactivated before
opening the enclosure or disconnecting
the wiring (in accordance with codes
and safety practices).
It is recommended that all seals and diaphragms be
replaced as a matter of good practice whenever a
valve is disassembled and re-assembled. Parts kits
are available through your local Sales Office.
If you are performing disassembly or assembly operations
on a Type ACE95Sr valve, refer to the Parts List and see
Figure 9. If you are working on a Type ACE95 valve, refer
to the Parts List and see Figure 8.
Note
Have your model number, serial number,
inlet pressure and set pressure range,
C
value, and tank vent/relief setting
v
available when ordering parts. Valve
information is on the nameplate (on the
upper actuator case).
Disassembly
WARNING
!
To avoid personal injury resulting from
sudden release of pressure, isolate the
valve from all pressure and cautiously
release trapped pressure from the pilot
or valve before attempting disassembly.
7
ACE95 Series
Table 5. Type ACE95 Diagnostics Table: Cv 1 through 4, Inlet Pressure Range Spring 121 to 200 psig / 8.3 to 13.8 bar
ACTUAL INLET SUPPLY
PRESSURE TO VALVE,
psig / bar
121 / 8.3 120 / 8.3 74 / 5.1 30 / 2.1
130 / 9.0 129 / 8.9 81 / 5.6 37 / 2.6
140 / 9.7 139 / 9.6 88 / 6.1 45 / 3.1
150 / 10.3 149 / 10.3 96 / 6.6 53 / 3.7
160 / 11.0 159 / 11.0 104 / 7.2 60 / 4.1
170 / 11.7 169 / 11.7 111 / 7.7 68 / 4.7
180 / 12.4 179 / 12.3 119 / 8.2 75 / 5.2
190 / 13.1 189 / 13.0 127 / 8.8 83 / 5.7
200 / 13.8 199 / 13.7 134 / 9.2 91 / 6.3
Table 6. Type ACE95 Diagnostics Table: Cv 7.5 and 10, Inlet Pressure Range Spring 25 to 50 psig / 1.7 to 3.4 bar
ACTUAL INLET SUPPLY
PRESSURE TO VALVE,
psig / bar
25 / 1.7 24 / 1.7 11 / 0.76 0 / 0.0
30 / 2.1 29 / 2.0 14 / 0.97 3 / 0.21
35 / 2.4 34 / 2.3 17 / 1.2 6 / 0.41
40 / 2.8 39 / 2.7 21 / 1.4 9 / 0.62
45 / 3.1 44 / 3.0 24 / 1.7 13 / 0.90
50 / 3.4 49 / 3.4 27 / 1.9 16 / 1.1
When Pilot Starts to Open,
psig / bar
When Pilot Starts to Open,
psig / bar
DIAGNOSTIC PORT PRESSURE
When Main Valve Starts to Open,
psig / bar
DIAGNOSTIC PORT PRESSURE
When Main Valve Starts to Open,
psig / bar
When Main Valve is Fully Open,
psig / bar
When Main Valve is Fully Open,
psig / bar
Spring Case Disassembly
1. Remove the actuator cap (key 1) and the spring load
by unthreading the adjusting screw (key 2).
See Figure 5.
2. Unthread the hex-head screws, lock washers and
nuts (keys 32, 28 and 31) from the upper and
lower actuator cases (keys 33 and 30). Lift the
upper actuator case from the lower actuator case.
3. Remove the spring seat and range spring
(keys 5 and 8).
Actuator/Diaphragm Disassembly
1. Disassemble the diaphragm by unthreading
the diaphragm retaining nut (key 13) from the
diaphragm bolt (key 15).
2. Remove the upper and lower diaphragm plates
(keys 10 and 48) and the diaphragm (key 11).
[The actuator gasket (key 12) sits on top of the
diaphragm.] In cases where the pressure range is
positive, the upper diaphragm plate is larger than
the lower diaphragm plate.
lower actuator case and the actuator O-ring (key 53,
Type ACE95) or gasket (key 27 Type ACE95Sr).
4. Remove the cap screws and lock washers
(keys 28 and 29, Type ACE95 or keys 50 and 51,
Type ACE95Sr) that attach the bonnet (key 17) to
the body (key 18).
5. Lift the bonnet (key 17) from the body (key 18).
Note
Slightly rotating the bonnet may help
loosen the O-ring (key 19).
Main Valve Disassembly
1. Remove the main valve (key 25) along with the
main valve spring (key 26), spring shim [key 34, 25
to 50 psig (1.7 to 3.4 bar), Type ACE95 only], and
spring guide (key 49, Type ACE95Sr only) from the
bonnet (key 17).
2. Unthread the screw (key 20) from the main valve.
3. Remove the plug (key 22) from the main valve
(key 25). See Figure 7.
3. Remove the internal bonnet screws and lock
washers (keys 28 and 29) that attach the lower
actuator case (key 30) to the bonnet. Remove the
8
4. Insert wooden dowel rod (or similar blunt tool)
through the bottom of the bonnet bore to remove
the cage (keys 35 and 40) sub-assembly.
ACE95 Series
Table 7. Type ACE95 Diagnostics Table: Cv 7.5 and 10, Inlet Pressure Range Spring 51 to 120 psig / 3.5 to 8.3 bar
ACTUAL INLET SUPPLY
PRESSURE TO VALVE,
psig / bar
51 / 3.5 50 / 3.4 24 / 1.7 3 / 0.21
60 / 4.1 59 / 4.1 30 / 2.1 9 / 0.62
70 / 4.8 69 / 4.8 36 / 2.5 15 / 1.0
80 / 5.5 79 / 5.4 42 / 2.9 22 / 1.5
90 / 6.2 89 / 6.1 49 / 3.4 28 / 1.9
100 / 6.9 99 / 6.8 55 / 3.8 34 / 2.3
110 / 7.6 109 / 7.5 61 / 4.2 41 / 2.8
120 / 8.3 119 / 8.2 68 / 4.7 47 / 3.2
Table 8. Type ACE95 Diagnostics Table: Cv 7.5 and 10, Inlet Pressure Range Spring 121 to 200 psig / 8.3 to 13.8 bar
ACTUAL INLET SUPPLY
PRESSURE TO VALVE,
psig / bar
121 / 8.3 120 / 8.3 63 / 4.3 31 / 2.1
130 / 9.0 129 / 8.9 69 / 4.8 37 / 2.6
140 / 9.7 139 / 9.6 75 / 5.2 43 / 3.0
150 / 10.3 149 / 10.3 82 / 5.7 49 / 3.4
160 / 11.0 159 / 11.0 88 / 6.1 56 / 3.9
170 / 11.7 169 / 11.7 94 / 6.5 62 / 4.3
180 / 12.4 179 / 12.3 101 / 7.0 68 / 4.7
190 / 13.1 189 / 13.0 107 / 7.4 75 / 5.2
200 / 13.8 199 / 13.7 113 / 7.8 81 / 5.6
When Pilot Starts to Open,
psig / bar
When Pilot Starts to Open,
psig / bar
DIAGNOSTIC PORT PRESSURE
When Main Valve Starts to Open,
psig / bar
DIAGNOSTIC PORT PRESSURE
When Main Valve Starts to Open,
psig / bar
When Main Valve is Fully Open,
psig / bar
When Main Valve is Fully Open,
psig / bar
Pilot/Cage Disassembly
CAUTION
Do not wrench or bend the stem of the
poppet (key 42). Use soft-jawed pliers to
hold the piston without damaging it.
1. The upper cage (key 40) will readily separate from
the lower cage (key 35). See Figure 6.
2. Gently press the poppet stem (key 42) to remove
the pilot from the upper cage (key 40).
3. Insert a small drill bit into the cross-drilled hole on
the poppet (key 42) to turn and loosen. Unthread
the poppet from the piston (key 37). Remove the
rolling diaphragm (key 38).
Assembly
When assembling the Type ACE95 or Type ACE95Sr
tank blanketing valve, clean all parts, inspect for unusual
wear, and lightly lubricate all O-rings and the groove that
locates the rolling diaphragm bead. See Figures 8 and 9.
Bonnet Sub-Assembly
Prepare the bonnet (key 17) by installing two (2)
internal O-rings (key 16).
Loctite® is a mark owned by Henkel Corporation.
Pilot/Cage Sub-Assembly
Refer to Figures 6, 8, and 9 when performing pilot/cage
sub-assembly operations.
1. Apply Loctite® #222 or equivalent to the piston
threads. Place the rolling diaphragm (key 38)
over the threaded portion of the piston (key 37).
Position the bead as shown in Figure 6.
2. Thread the poppet (key 42) onto the piston
(key 37). Use soft-jawed pliers to restrain the
piston so it is not damaged. Do not hold the poppet
by the poppet stem. Insert a small drill bit into the
cross-drilled hole on the poppet stem (key 42) to
turn and tighten.
3. Slide the O-ring (key 39) onto the poppet (key 42).
4. Place the pilot sub-assembly into the upper cage
(key 40).
5. Press the lower cage (key 35) and upper cage
(key 40) together to ensure the groove in the lower
cage engages the bead on the rolling
diaphragm (key 38).
Note
Ensure that the rolling diaphragm bead
is positioned so that it sits in the groove
of the lower cage (see Figures 8 and 9).
9
ACE95 Series
Table 9. Type ACE95Sr Diagnostics Table: Cv 20 through 60, Inlet Pressure Range Spring 25 to 50 psig / 1.7 to 3.4 bar
ACTUAL INLET SUPPLY
PRESSURE TO VALVE,
psig / bar
25 / 1.7 24 / 1.7 16 / 1.1 5 / 0.35
30 / 2.1 29 / 2.0 20 / 1.4 9 / 0.62
35 / 2.4 34 / 2.3 24 / 1.7 14 / 0.97
40 / 2.8 39 / 2.7 29 / 2.0 18 / 1.2
45 / 3.1 44 / 3.0 33 / 2.3 23 / 1.6
50 / 3.4 49 / 3.4 38 / 2.6 27 / 1.9
Table 10. Type ACE95Sr Diagnostics Table: Cv 20 through 60, Inlet Pressure Range Spring 51 to 120 psig / 3.5 to 8.3 bar
ACTUAL INLET SUPPLY
PRESSURE TO VALVE,
psig / bar
51 / 3.5 50 / 3.4 39 / 2.7 11 / 0.76
60 / 4.1 59 / 4.1 48 / 3.3 19 / 1.3
70 / 4.8 69 / 4.8 57 / 3.9 28 / 1.9
80 / 5.5 79 / 5.4 66 / 4.6 37 / 2.6
90 / 6.2 89 / 6.1 75 / 5.2 46 / 3.2
100 / 6.9 99 / 6.8 84 / 5.8 55 / 3.8
110 / 7.6 109 / 7.5 93 / 6.4 64 / 4.4
120 / 8.3 119 / 8.2 102 / 7.0 73 / 5.0
When Pilot Starts to Open,
psig / bar
When Pilot Starts to Open,
psig / bar
DIAGNOSTIC PORT PRESSURE
When Main Valve Starts to Open,
psig / bar
DIAGNOSTIC PORT PRESSURE
When Main Valve Starts to Open,
psig / bar
When Main Valve is Fully Open,
When Main Valve is Fully Open,
psig / bar
psig / bar
If it does not, the rolling diaphragm
was installed upside-down in Cage
Sub-Assembly step 2.
6. Remove the lower cage (key 35).
7. Lubricate the piston (key 37) and lower cage
(key 35) groove.
8. Install the pilot spring (key 36) into the piston
(key 37) and re-install the lower cage (key 35).
9. Hold the pilot sub-assembly together and insert it
into the bonnet (key 17). Press rmly (the bonnet
O-rings will offer resistance).
10. Press the poppet stem. It should freely move up
and down. If it does not, repeat the procedure to
this point to determine the cause.
Note
Use soft-jawed pliers to restrain the
main valve (key 25) while applying
Loctite® #222 or equivalent to the
threads of the screw (key 20).
Main Valve Sub-Assembly
1. Prepare the main piston (key 25) by installing
the plug and O-ring (keys 22 and 23) with the
screw (key 20) and lock washer (key 21). Apply
Loctite® #222 or equivalent to the screw threads.
2. Install the main valve spring (key 26), spring
shim [key 34, 25 to 50 psig / 1.7 to 3.4 bar,
Loctite® is a mark owned by Henkel Corporation.
Type ACE95 only], and spring guide valve [key 49,
25 to 50 psig / 1.7 to 3.4 bar / 51 to 120 psig /
3.5 to 8.3 bar, Type ACE95Sr only] into the piston
(key 25).
3. Place the main valve sub-assembly [piston, spring,
and plug (keys 25, 26, and 22)] into the body (key 18).
4. Place an O-ring (key 19) into the body (key 18).
Body Sub-Assembly
1. Place the bonnet (key 17) onto the body (key 18)
and main valve (key 25).
2. Press firmly to seat the bonnet O-ring joint. Attach
the bonnet (key 17) to the body (key 18) with four
cap screws and lock washers (keys 28 and 29,
Type ACE95 or keys 50 and 51, Type ACE95Sr).
3. Place the actuator O-ring (key 53, Type ACE95)
or gasket (key 27, Type ACE95Sr) and the lower
actuator case (key 30) onto the bonnet (key 17).
4. Install lock washers (key 28), and hex-head
screws (key 29).
5. Tighten all hex-head screws (key 29) uniformly.
Diaphragm Sub-Assembly
1. Place an O-ring (key 14) into the groove of the
diaphragm bolt (key 15).
2. Build the diaphragm sub-assembly with the lower
diaphragm plate (key 48), diaphragm (key 11), and
upper diaphragm plate (key 10). Fasten the plates
10
POPPET (STEM)
(KEY 42)
ROLLING DIAPHRAGM
(KEY 38)
UPPER CAGE
(KEY 40)
ACE95 Series
W8162
CROSS-DRILLED
HOLE
O-RING
(KEY 39)
PISTON
(KEY 37)
Figure 6. Cage Sub-Assembly
Table 11. Type ACE95Sr Diagnostics Table: C
ACTUAL INLET SUPPLY
PRESSURE TO VALVE,
psig / bar
121 / 8.3 120 / 8.3 103 / 7.1 60 / 4.1
130 / 9.0 129 / 8.9 111 / 7.7 68 / 4.7
140 / 9.7 139 / 9.6 120 / 8.3 77 / 5.3
150 / 10.3 149 / 10.3 129 / 8.9 86 / 5.9
160 / 11.0 159 / 11.0 138 / 9.5 95 / 6.6
170 / 11.7 169 / 11.7 147 / 10.1 104 / 7.2
180 / 12.4 179 / 12.3 156 / 10.8 113 / 7.8
190 / 13.1 189 / 13.0 165 / 11.4 122 / 8.4
200 / 13.8 199 / 13.7 174 / 12.0 134 / 9.2
When Pilot Starts to Open,
20 through 60, Inlet Pressure Range Spring 121 to 200 psig / 8.3 to 13.8 bar
v
psig / bar
together with the diaphragm bolt (key 15) and the
diaphragm retaining nut (key 13). The diaphragm
retaining nut sits on the upper diaphragm plate.
Apply Loctite® #222 or equivalent to the
diaphragm bolt.
Note
Two different diaphragm plates are used
when the pressure range is positive.
In cases where the pressure range is
positive, the upper diaphragm plate
(key 10) is larger than the lower diaphragm
plate (key 48).
3. If you are using a negative spring range, install
the lower range spring (key 162) into the lower
actuator case (key 30).
4. Place the diaphragm sub-assembly into the
lower actuator case (key 30) with the diaphragm
retaining nut (key 13) on top. Place the actuator
gasket (key 12) on top of the diaphragm (key 11)
W8161
LOWER CAGE
(KEY 35)
DIAGNOSTIC PORT PRESSURE
When Main Valve Starts to Open,
psig / bar
When Main Valve is Fully Open,
psig / bar
and align the holes with those on the lower
actuator case (key 30).
5. If it was removed, place the spring case gasket
(key 9) between the spring case (key 7) and upper
actuator case (key 33) before attaching the spring
case to the upper actuator case. Attach the spring
case to the upper actuator case with hex-head
screws (key 32).
6. Place the range spring (key 8) and spring seat
(key 5) onto the diaphragm sub-assembly over the
diaphragm retaining nut (key 13).
7. Place the upper actuator case (key 33) over the
range spring (key 8), spring seat (key 5), and the
lower actuator case (key 30).
8. Build the actuator case by installing hex-head
screws, lock washers, and nuts (keys 32, 28,
and 31) into the upper and lower actuator cases
(keys 33 and 30). Use a washer (key 47) on
steel cases.
Loctite® is a mark owned by Henkel Corporation.
11
ACE95 Series
9. Thread the range spring adjusting screw (key 2) in
about halfway.
10. Tighten all nuts (key 31) uniformly.
11. Reinstall the valve according to the instructions in
the Installation section of this manual.
12. Adjust the setpoint according to the instructions in
the Adjustment section.
13. Replace the actuator cap (key 1).
Parts Ordering
Each ACE95 Series valve is assigned a serial number
printed on the nameplate on the main valve actuator.
Refer to this number when contacting your local Sales
Office for assistance, or when ordering replacement
parts. When ordering a replacement part, be sure to
reference the key number for each needed part and
include the complete 11-character part number from the
following parts list.
Key Description Part Number
Parts Kits
Actuator Diaphragm and Gasket Kit
(includes keys 9, 11 and 12)
Types ACE95 and ACE95Sr 10C1273X012
Rolling Diaphragm and Seal Kits (includes
keys 4, 14, 16, 19, 23, 24, 27, 38, 39, 41)
Type ACE95, Cv 1 through 4
Nitrile (NBR) 19B9098X012
Ethylenepropylene (EPDM/FDA) 19B9098X032
Fluorocarbon (FKM) 19B9098X022
Perfluoroelastomer (FFKM) 19B9098X042
Type ACE95, Cv 7.5 and 10
Nitrile (NBR) 19B9099X012
Ethylenepropylene (EPDM/FDA) 19B9099X032
Fluorocarbon (FKM) 19B9099X022
Perfluoroelastomer (FFKM) 19B9099X042
Type ACE95Sr
Nitrile (NBR) 19B6038X012
Ethylenepropylene (EPDM/FDA) 19B6038X032
Fluorocarbon (FKM) 19B6038X022
Perfluoroelastomer (FFKM) 19B6038X042
1 Cap
Stainless steel GC053301X02
Steel GC053301X32
2 Adjusting Screw
0.5 to 5 in. w.c. / 1 to 12 mbar GC060216X12
4 to 10 in. w.c. / 10 to 25 mbar GC060216X12
8 to 15 in. w.c. / 20 to 37 mbar GC060216X12
0.5 to 1.5 psi / 0.03 to 0.10 bar GC060221X12
-1.0 to 1.0 in. w.c. / -2 to 2 mbar GC060216X12
-5 to -0.5 in. w.c. (VAC) / -12 to -1 mbar GC060216X12
3 Lock Nut GC060313X02
4* O-ring
Nitrile (NBR) 1F463606992
Ethylenepropylene (EPDM/FDA) 1F4636X0082
Fluorocarbon (FKM) 1N571406382
Perfluoroelastomer (FFKM) 1F4636X0052
5 Spring Seat GC050502X02
6 Vent (Type Y602-A12) 27A5516X012
7 Spring Case
Stainless steel GC053101X02
Steel GC053101X32
* Recommended Spare Part
12
LOCK WASHER
(KEY 21)
PLUG
(KEY 22)
O-RING
(KEY 23)
PISTON (MAIN)
(KEY 25)
O-RING
(KEY 24)
SPRING (MAIN VALVE)
(KEY 26)
W8160
SCREW
(KEY 20)
Figure 7. Typical Main Valve and Spring (Type ACE95Sr shown)
Key Description Part Number
8 Range Spring
0.5 to 5 in. w.c. / 1,2 to 12,4 mbar GC220701X22
4 to 10 in. w.c. / 10 to 25 mbar GC220702X22
8 to 15 in. w.c. / 20 to 37 mbar GC220703X22
0.5 to 1.5 psi / 0.03 to 0.10 bar GC220708X22
-1.0 to 1.0 in. w.c. / -2 to 2 mbar GC220701X22
-5 to -0.5 in. w.c. (VAC) / -12 to -1 mbar GC220701X22
9* Gasket (spring tower) GC070428X02
10 Diaphragm Plate (upper) GC260104X02
11 Diaphragm (main) - FEP GC070234X72
12* Gasket (actuator) GC070427X02
13 Diaphragm Retaining Nut GC053215X02
14* O-ring
Nitrile (NBR) GC070173X02
Ethylenepropylene (EPDM/FDA) GC070173X52
Fluorocarbon (FKM) GC070173X12
Perfluoroelastomer (FFKM) GC070173X62
15 Diaphragm Bolt GC053210X02
16* O-ring (2 required)
Nitrile (NBR) 1F115306992
Ethylenepropylene (EPDM/FDA) 1F1153X0062
Fluorocarbon (FKM) 1F1153X0022
Perfluoroelastomer (FFKM) 1F1153X0032
17 Bonnet
18 Body
19* O-ring
1 through 4 GC050929X12
C
v
Cv 7.5 and 10 GC050929X02
Cv 20 through 60 GC050919X62
Cv 1 through 4
3/4 NPT GE02625X012
1 NPT GE02623X012
Cv 7.5 and 10
1 NPT GE02627X012
Cv 20 through 60
2 NPT GC050927X62
Type ACE95
Nitrile (NBR) 1C415706992
Ethylenepropylene (EPDM/FDA) 1C4157X0092
Fluorocarbon (FKM) 1C4157X0032
Perfluoroelastomer (FFKM) 1C4157X0082
Type ACE95Sr
Nitrile (NBR) 1F3581X0082
Ethylenepropylene (EPDM/FDA) 1F3581X0102
Fluorocarbon (FKM) 1F3581X0022
Perfluoroelastomer (FFKM) 1F3581X0092
ACE95 Series
Key Description Part Number
20 Round-Head Machine Screw
Type ACE95 1A3776X0012
Type ACE95Sr GC060225X02
21 Lock Washer
Type ACE95 GC060903X02
Type ACE95Sr GC060906X02
22 Plug
Type ACE95
Cv 1 GC053206X02
Cv 2 GC053205X02
Cv 4 GC053204X02
Cv 7.5 GC053213X02
Cv 10 GC053212X02
Type ACE95Sr
Cv 20 GC053220X02
Cv 45 GC053221X02
Cv 60 GC053218X02
23* O-ring
Type ACE95, Cv 1 through 4
Nitrile (NBR) 1D2888X0032
Ethylenepropylene (EPDM/FDA) 1D2888X0042
Fluorocarbon (FKM) 1D2888X0052
Perfluoroelastomer (FFKM) 1D2888X0022
Type ACE95, Cv 7.5 and 10
Nitrile (NBR) 18A1088X022
Ethylenepropylene (EPDM/FDA) 18A1088X042
Fluorocarbon (FKM) 18A1088X052
Perfluoroelastomer (FFKM) 18A1088X032
Type ACE95Sr Cv 20 through 60
Nitrile (NBR) 1C628006992
Ethylenepropylene (EPDM/FDA) 1C6280X0102
Fluorocarbon (FKM) 1C6280X0012
Perfluoroelastomer (FFKM) 1C6280X0092
24* O-ring
Type ACE95 Cv 1 through 4
Nitrile (NBR) 1C782206992
Ethylenepropylene (EPDM/FDA) 1C7822X0122
Fluorocarbon (FKM) 1C7822X0132
Perfluoroelastomer (FFKM) 1C7822X0112
Type ACE95 Cv 7.5 and 10
Nitrile (NBR) 1D2375X0062
Ethylenepropylene (EPDM/FDA) 1D2375X0082
Fluorocarbon (FKM) 1D237506382
Perfluoroelastomer (FFKM) 1D2375X0072
Type ACE95Sr Cv 20 through 60
Nitrile (NBR) 1D785306992
Ethylenepropylene (EPDM/FDA) 1D7853X0032
Fluorocarbon (FKM) 1D7853X0042
Perfluoroelastomer (FFKM) 1D7853X0012
25 Piston (main valve)
Type ACE95: Cv 1 through 4 GC053203X02
Type ACE95: Cv 7.5 and 10 GC053211X02
Type ACE95Sr: Cv 20 through 60 GC053219X02
26 Spring (main valve)
Type ACE95
Cv 1 through 4, 25 to 50 psig / 1.7 to 3.4 bar GC220704X22
Cv 1 through 4, 51 to 120 psig / 3.5 to 8.3 bar GC220705X22
Cv 1 through 4, 121 to 200 psig / 8.3 to 13.8 bar GC220706X22
Cv 7.5 and 10, 25 to 50 psig / 1.7 to 3.4 bar GC220705X22
Cv 7.5 and 10, 51 to 120 psig / 3.5 to 8.3 bar GC220706X22
Cv 7.5 and 10, 121 to 200 psig / 8.3 to 13.8 bar GC220709X22
Type ACE95Sr
Cv 20 through 60, 25 to 50 psig / 1.7 to 3.4 bar GC220714X22
Cv 20 through 60, 51 to 120 psig / 3.5 to 8.3 bar GC220712X22
Cv 20 through 60, 121 to 200 psig / 8.3 to 13.8 bar GC220713X22
27* Gasket (bonnet/actuator) (Type ACE95Sr Only) GC070429X32
Key Description Part Number
28 Lock Washer
Type ACE95 (28 required) GC060906X02
Type ACE95Sr
Actuator Flange (20 required) GC060906X02
Actuator to Bonnet (4 required) GC060905X02
29 Hex-Head Machine Screw
Type ACE95 (8 required) 1A3917X0062
Type ACE95Sr (4 required) GC060224X12
30 Actuator Case (lower)
Stainless steel GC260105X02
Steel GC260105X32
31 Hex Nut (20 required) 1A3457K0012
32 Hex-Head Machine Screw (24 required) GC060220X02
33 Actuator Case (upper)
Stainless steel GC260102X02
Steel GC260102X12
34 Spring Shim (Type ACE95 only)
25 to 50 psig / 1.7 to 3.4 bar GC053209X02
35 Lower Cage GC053002X02
36 Spring (cage) GC220707X22
37 Piston (pilot) GC053202X02
38* Rolling Diaphragm
Nitrile (NBR) GC071101X02
Ethylenepropylene (EPDM/FDA) GC071101X22
Fluorocarbon (FKM) GC071101X12
Perfluoroelastomer (FFKM) GC071101X32
39* O-ring
Nitrile (NBR) 1D2888X0032
Ethylenepropylene (EPDM/FDA) 1D2888X0042
Fluorocarbon (FKM) 1D2888X0052
Perfluoroelastomer (FFKM) 1D2888X0022
40 Cage (upper) GC053001X02
41* O-ring
Nitrile (NBR) 10A0042X052
Ethylenepropylene (EPDM/FDA) 10A0042X072
Fluorocarbon (FKM) 10A0042X012
Perfluoroelastomer (FFKM) 10A0042X062
42 Pilot (poppet) GC053201X02
43 Pilot Filter (optional, not shown)
Aluminum 10C1269X022
Stainless steel 10C1269X012
48 Diaphragm Plate (lower)
Positive Spring Range
[3 in. / 76 mm - diameter] GC260113X02
Negative Spring Range
[9 in. / 229 mm - diameter] GC260104X02
49 Spring Guide (Type ACE95Sr only) GC050505X22
25 to 50 psig / 1.7 to 3.4 bar
51 to 120 psig / 3.5 to 8.3 bar
50 Hex Head Cap Screw (4 required) GC060224X12
51 Lock Washer (4 required) GC060905X02
53* O-ring (Type ACE95 Only)
Nitrile (NBR) 1H991206992
Ethylenepropylene (EPDM/FDA) 1R3971X0012
Fluorocarbon (FKM) 1R397106382
Perfluoroelastomer (FFKM) 1R3971X0022
138 Hex-Head Pipe Plug (Type ACE95 Only)
NPS 3/4 body 1A771535072
NPS 1 (DN 25) body 1A7947X0022
139 Hex-Head Pipe Plug 1A767535072
162 Lower Range Spring
[negative pressure range only,
used with upper spring (key 8)]
-1.0 to 1.0 in. w.c. / -2 to 2 mbar GC220717X22
-5 to -0.5 in. w.c. (VAC) / -12 to -1 mbar GC220710X22
168 Sealant - - - - - - - - - - 169 Lubricant - - - - - - - - - - -
* Recommended Spare Part
13
ACE95 Series
LOCATE
GROOVE IN
LOWER CAGE
FOR ROLLING
DIAPHRAGM
BEAD
42
41
L
40
1
39
L
2
S
38
L
35
28
36
3332
28
31
30
37
L
S
162
29
L
32
48
53
3
L
4
5
6
7
8
15
9
13
14
10
12
L
11
GE03297
NOT REQUIRED IN ALL ASSEMBLIES
APPLY LUBRICANT OR SEALANT
L = LUBRICANT
S = SEALANT
14
29
28
26
25
24
L
34
23 22
L
Figure 8. Type ACE95 Tank Blanketing Valve
L
16
17
18
L
20
21
19
ACE95 Series
LOCATE
GROOVE IN
LOWER CAGE
FOR ROLLING
DIAPHRAGM
BEAD
E0626
42
41
1
40
39
2
3
4
38
37
36
32
162
35
33
5
6
10 11
7
12
8
9
3247
48
28
303128
29
27
13
14
15
16
LOCATE GROOVE IN LOWER
CAGE FOR ROLLING
DIAPHRAGM BEAD
26
50 51
49
17
19 18
25
24
23
22
20 21
E0625
Figure 9. Type ACE95Sr Tank Blanketing Valve
15
ACE95 Series
Webadmin.Regulators@emerson.com
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T +1 800 558 5853
+1 972 548 3574
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D102775X012 © 2001, 2019 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 08/19.
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Electric Co. All other marks are the property of their prospective owners.
Fisher™ is a mark owned by Fisher Controls International LLC, a
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The contents of this publication are presented for informational purposes
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are not to be construed as warranties or guarantees, express or implied,
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Emerson Process Management Regulator Technologies, Inc. product
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