TYPE 167D TWO-WAY SWITCHING VALVE TYPE 167DA THREE-WAY SWITCHING VALVE
Figure 1. 167D Series Switching Valves
WARNING
!
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,
re and/or chemical contamination
causing property damage and personal
injury or death.
Fisher® switching valves must be
installed, operated, and maintained
in accordance with federal, state, and
local codes, rules, and regulations, and
Emerson Process Management Regulator
Technologies, Inc. instructions.
If the switching valve vents gas or a
leak develops in the system, service
to the unit may be required. Failure
to correct trouble could result in a
hazardous condition.
Installation, operation, and maintenance
procedures performed by unquali ed
personnel may result in improper
adjustment and unsafe operation. Either
condition may result in equipment
damage or personal injury. Use quali ed
personnel when installing, operating,
and maintaining the 167D Series
switching valves.
Introduction
Scope of the Manual
This manual provides instructions for the installation,
maintenance, and parts ordering for the 167D Series
Switching Valves. Instructions and parts lists for other
equipment mentioned in this instruction manual, as
well as for other switching valves are found in
separate manuals.
www. sherregulators.com
D103234X012
167D Series
Specications
Some general 167D Series switching valve ratings and other specications are given on this page. A label on the
spring case gives the control spring range for a given valve as it comes from the factory.
Available Congurations
Types 167D and 167DS: Two-way switching valveTypes 167DA and 167DAS: Three-way
switching valves
Body Size, Inlet and Outlet Connection StylePorts A and C: 1/4 or 1/2 NPTVent and Control Pressure Connections
(Port D) and Port B: 1/4 NPT
Maximum Operating Inlet Pressure
(1)
Types 167D and 167DS: 400 psig / 27,6 barTypes 167DA and 167DAS: 125 psig / 8,6 bar Types 167DA and 167DAS (NACE):
100 psig / 6,9 bar
Set Pressure Ranges
See Tables 1 and 2
Maximum Diaphragm Pressure
(1)
150 psi / 10,3 bar over outlet pressure setting up
to a maximum of 250 psi / 17,2 bar
Flow and Sizing Coefcients
See Table 3
Spring Case Vent Location
Aligned with inlet (standard), other positions optional
Temperature Capabilities
(1)
Nitrile (NBR)
Standard Service (Types 167D and 167DA only):
-20° to 180°F / -29° to 82°CLow Temperature Service (Types 167D and
167DA only) and Standard Service (Types 167DS
and 167DAS only): -40° to 180°F / -40° to 82°C
Fluorocarbon (FKM)
High Temperature Service:0° to 300°F /
-18° to 149°C
Approximate Weights
Types 167D and 167DA: 1.2 pounds / 0,5 kg
Types 167DS and 167DAS: 2.8 pounds / 1 kg
Options
Types 167D and 167DA
• Handwheel adjusting screw
• Fluorocarbon (FKM) diaphragm, soft seat, seat,
and O-rings
• Stainless steel valve stem and plug. Includes
stainless steel seat
• 1-hole panel mount with handwheel adjusting
screw and 1/4 NPT tap spring case
• 3-hole panel mount bonnet with handwheel
adjusting screw and 1/4 NPT spring case
• 1/4 NPT tapped vent spring case
• 1/4 NPT tapped vent and closing cap
• Adjusting screw with locknut and a lock wire to
one ange bolt (For Type 167D only)
• Panel mounting bracket. Includes 1/4 NPT
spring case, standard adjusting screw, nut,
and bracket
• Yoke mounting bracket. Includes 1/4 NPT
spring case, standard adjusting screw, nut,
fasteners, and bracket
• Size 30-70 casing mounting bracket. Includes
1/4 NPT spring case, standard adjusting screw,
nut, fasteners, and bracket
• NACE MR0175 or NACE MR0103 construction
Types 167DS and 167DAS
• Handwheel adjusting screw
• Fluorocarbon (FKM) diaphragm, soft seat, seat,
and O-rings
• 1-hole panel mount with handwheel adjusting
screw and 1/4 NPT tap spring case
• Panel mounting bracket. Includes 1/4 NPT
spring case, standard adjusting screw, nut, and
bracket
• Yoke mounting bracket. Includes 1/4 NPT
spring case, standard adjusting screw, nut,
fasteners,
and bracket
• Size 30-70 casing mounting bracket. Includes
nut, fasteners, and bracket
(2)
1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
2. Product complies with the material requirements of NACE MR0175 or MR0103. Environmental limits may apply.
2
167D Series
OUTLET PRESSURE (WHEN LOADING PRESSURE IS LESS THAN SETPOINT)
INLET PRESSURE
OUTLET PRESSURE (WHEN LOADING PRESSURE IS EQUAL TO OR GREATER THAN SETPOINT)ATMOSPHERIC PRESSURE
LOADING PRESSURE
ADJUSTING SCREW
ORIFICE SEAT
M1151
O-RING
PORT A
BODY
CONTROL SPRING
DIAPHRAGM
PORT C
VALVE STEM
VALVE PLUG
VALVE SPRING
PORT B
SOFT SEAT
O-RING
PORT A
M1152
TYPE 167DA THREE-WAY SWITCHING VALVE
INLET PRESSURE
OUTLET PRESSURE (WHEN LOADING PRESSURE IS LESS THAN SETPOINT)
OUTLET PRESSURE (WHEN LOADING PRESSURE IS EQUAL TO OR GREATER THAN SETPOINT)
ATMOSPHERIC PRESSURE
LOADING PRESSURE
Figure 2. 167D Series Operational Schematics (Port D not shown)
ADJUSTING SCREW
BODY
TYPE 167D TWO-WAY SWITCHING VALVE
CONTROL SPRING
DIAPHRAGM
PORT C
VALVE STEM
ORIFICE SEAT
VALVE PLUG
VALVE SPRING
TYPE
167DA
167DAS
TYPE
167D
167DS
Table 1. Three-Way Switching Valves Set Pressure Ranges and Control Spring Data
SET PRESSURE RANGE CONTROL SPRING DATA
Port A or C
as Inlet
psigbarpsigbarInchmmInch mmpsidbar d
14 to 20
16 to 35
25 to 60
40 to 125
14 to 20
16 to 35
25 to 60
40 to 125
0,97 to 1,4
1,1 to 2,4
1,7 to 4,1
2,8 to 8,6
0,97 to 1,4
1,1 to 2,4
1,7 to 4,1
2,8 to 8,6
Port B as Inlet
7 to 20
10 to 30
25 to 50
40 to 90
7 to 20
10 to 30
25 to 50
40 to 90
0,48 to 1,4
0,69 to 2,1
1,7 to 3,4
2,8 to 6,2
0,48 to 1,4
0,69 to 2,1
1,7 to 3,4
2,8 to 6,2
Color CodeMaterialPart Number
White stripe
Purple stripe
Brown stripe
Pink stripe
White
Purple
Brown
Pink
Zinc-plated
Music Wire
Chrome
Silicon
Inconel
X-750
®
GE40282X012
GE40283X012
GE40284X012
GE40345X012
GE40320X012
GE40321X012
GE40322X012
GE40323X012
Wire Diameter Free Length
0.145
0.172
0.207
0.148
0.162
0.177
0.218
3,68
3,96
4,37
5,26
3,76
4,12
4,50
5,54
1.425 36,2
1.750 44,4
0.156
MAXIMUM
PRESSURE
CHANGE ON
TO SHIFT FROM
PORT B CLOSED
TO PORT C
CLOSED
10130,69
17
35
8
12
16
31
Table 2. Two-Way Switching Valves Set Pressure Ranges and Control Spring Data
The 167D Series switching valves are pneumatically
operated and controlled units, built with a wide range of
capabilities to handle those switching applications that
involve venting, on-off control, and failure modes.
• The Types 167D and 167DS are two-way
switching valves.
• The Types 167DA and 167DAS are three-way
switching valves.
Principle of Operation
Refer to Figure 2 and also refer to Figures 3 through
5 for port D location. Control pressure enters the
switching valve through port D (not shown in Figure 2)
and registers under the diaphragm. Control pressure
overcomes the spring force and the diaphragm and
raise the valve plug, closing port C and opening port B
of the Type 167DA three-way switching valve. In this
condition, the Type 167D construction is turned off and
the Type 167DA construction provides ow from path
A to B. If, either intentionally or through pneumatic
failure, the control pressure drops below the spring
force, the diaphragm and valve plug move downward,
opening port C and closing port B of the Type 167DA
three-way switching valve. In this condition both
constructions provide a ow path from port A to
port C. The pressure change necessary to switch the
valve depends on the spring used and the setting of
the adjusting screw on the switching valve.
Overpressure Protection
valve or associated equipment may cause leakage,
parts damage, or personal injury due to bursting of
pressure-containing parts or explosion of accumulated
gas. Switching valve operation within ratings does
not preclude the possibility of damage from external
sources or from debris in the pipeline. A switching
valve should be inspected for damage periodically and
after any overpressure condition.
Installation
Note
If the switching valve is shipped
mounted on another unit, install that
unit according to the appropriate
Instruction Manual.
WARNING
!
Personal injury, property damage,
equipment damage, or leakage due to
escaping gas or bursting of pressurecontaining parts may result if this
switching valve is overpressured or
is installed where service conditions
could exceed the limits given in the
Specications section, or where
conditions exceed any ratings of the
adjacent piping or piping connections.
To avoid such injury or damage,
provide pressure-relieving or pressurelimiting devices (as required by the
appropriate code, regulation, or
standard) to prevent service conditions
from exceeding those limits.
The 167D Series switching valves have maximum
outlet pressure ratings that are lower than their
maximum inlet pressure ratings. A pressure-
relieving or pressure-limiting device is needed if inlet
pressure can exceed the maximum outlet pressure
rating. Overpressuring any portion of a switching
Table 3. Flow and Sizing Coefcients
TYPESBODY SIZEPORT
167D, 167DS
167DA, 167DAS
4
1/4 NPT
1/2 NPT46.501.1839.030.96
All sizesB27.790.9628.740.52
1/4 NPT
1/2 NPT58.861.8132.220.66
C
C
Before installing a Type 167D, 167DA, 167DS, or
167DAS switching valve, be sure the installation
complies with the following installation guidelines:
1. Switching valve operation within ratings does not
preclude the possibility of damage from debris in
WIDE-OPEN FLOW COEFFICIENTS
C
g
41.461.0937.560.89
49.351.6030.580.59
C
v
C
1
IEC SIZING
COEFFICIENTS
X
t
TYPE 657
1/4 NPT SUPPLY
TYPE
DVC6010
A
B
TYPE 167DA OR 167DAS
D
A
C
B
167D Series
10C0622
TYPE 67CFR
Figure 3. Typical 167DA or 167DAS Installation
(Lockup system using Type 167DA or 167DAS to close air circuit to diaphragm of main valve in case of plant air failure. Main valve
will remain in position it occupied at time of supply pressure failure.)
TYPE 167D OR 167DS SWITCHING
VALVE SET TO OPEN AT
5 PSI / 0,34 bar
D
A
TO INSTRUMENT AIR SUPPLY
55 PSI / 3,8 bar
WHISTLE
C
AF8400
COOLING TOWER
PUMP
PRESSURE GAUGE
PUMP DISCHARGE
Figure 4. Typical 167D or 167DS Installation
(Warning system using Type 167D or 167DS two-way valve to activate a whistle when pump discharge pressure falls.)
GE37992
TYPE 657
TYPE 167DA
TYPE
DVC6010/
67CFR
A
CHECK
VALV E
1/4 NPT
D
B
OR 167DAS
C
3/4 NPT
SUPPLY
S
2
1
3
VENT
Figure 5. Typical Switching Valve Schematic
ASCO SOLENOID
DE-ENERGIZED
VOLUME TANK
SHIPPED WITH ACTUATOR
FACTORY (1/4 O.D.) OR
CUSTOMER SUPPLIED TUBING
(PIPED BY CUSTOMER)
5
167D Series
the lines or from external sources. Switching
valves should be inspected for damage
periodically and after any overpressure condition.
2. Only personnel qualied through training and
experience should install, operate, and maintain
a switching valve. Make sure that there is no
damage to or foreign material in the switching
valve. Also ensure that all tubing and piping is
free of debris.
3. Install the switching valve to achieve the desired
switching results. Connect the control pressure
line to either D port. Verify that the other D port
is plugged. The port labeled “IN” or port A is the
common inlet connection and ports B and C are
the outlet connections. Flow is either from A to B
or A to C.
4. A clogged spring case vent hole may cause the
switching valve to function improperly. To keep
this vent hole from being plugged (and to keep
the spring case from collecting moisture, corrosive
chemicals, or other foreign material) orient the
vent to the lowest possible point on the spring
case or otherwise protect it.
Inspect the vent hole regularly to make
sure it is not plugged. Spring case vent
hole orientation may be changed by rotating the
spring case with respect to the body. A 1/4 NPT
spring case vent may be remotely vented by
installing obstruction-free tubing or piping into
the vent. Protect the remote vent by installing a
screened vent cap on the remote end of the
vent pipe.
Startup and Adjustment
Key numbers are referenced in Figures 7 through 13.
1. With proper installation completed and downstream
equipment properly adjusted, slowly open the
upstream and downstream shut-off valve (when
used) while using pressure gauges to
monitor pressure.
WARNING
!
To avoid personal injury, property
damage, or equipment damage caused
by bursting of pressure containing parts
or explosion of accumulated gas, never
adjust the control spring to produce an
outlet pressure higher than the upper
limit of the outlet pressure range for that
particular spring. If the desired outlet
pressure is not within the range of the
control spring, install a spring of the
proper range according to the diaphragm
parts maintenance procedure.
2. If outlet pressure adjustment is necessary,
monitor outlet pressure with a gauge during the
adjustment procedure. The switching valve
is adjusted by loosening the hexnut (key 19),
if used, and turning the adjusting screw or
handwheel (key 18) clockwise to increase or
counterclockwise to decrease the outlet pressure
setting. Retighten the hexnut to maintain the
adjustment position.
5. For use in switching valve shutdown, install
upstream block and vent valves and downstream
block and vent valves (if required), or provide
some other suitable means of properly venting the
switching valves inlet and outlet pressures. Install
a pressure gauge to monitor instruments
on startup.
6. Apply a good grade of pipe compound to the
external pipe threads before making connections,
making sure not to get the pipe compound inside
the switching valves.
7. Install tubing tting or piping into the threaded NPT
inlet connection on the body (key 1) and into the
threaded NPT outlet connections.
8. The 1/4 NPT control pressure ports must be
plugged if not in use.
6
Maintenance
Switching valve parts are subject to normal wear and
must be inspected and replaced as necessary. The
frequency of inspection and replacement of parts
depend on the severity of service conditions and
applicable codes and government regulations.
Note
If sufcient clearance exists, the body
(key 1) may remain mounted on other
equipment or in a line or panel during
maintenance unless the entire switching
valve will be replaced.
167D Series
WARNING
!
To avoid personal injury, property damage,
or equipment damage caused by sudden
release of pressure or explosion of
accumulated gas, do not attempt any
maintenance or disassembly without rst
isolating the switching valve from system
pressure and relieving all internal pressure
from the switching valve.
Trim Maintenance
Key numbers are referenced in Figures 7 through 10.
1. Unscrew the spring retainer (key 48) and separate
the spring retainer and O-ring (key 14) from the
body (key 1).
2. Inspect the removed parts for damage and debris.
Replace any damaged parts. Apply a high
quality lubricant to the O-ring (key 50)
before reassembling.
3. To remove the valve stem (key 11) and valve plug
(key 57), grasp the end and pull it straight
out of the body (key 1). Inspect the parts for
damage and debris. Replace any damaged parts.
The valve stem and valve plug may be cleaned or
replaced. Types 167D and 167DS: If the soft seat
(key 15) was removed, make sure it is properly
snapped into place before installing the valve
stem. Apply a high quality lubricant to the O-ring
(key 50) before reinstalling the valve stem.
4. Install valve stem and valve plug by sliding the
valve stem through center of the seat (key 58)
until the valve plug contacts the seat. Apply
lubricant to O-ring (key 14) and thread in spring
retainer (key 48). Torque spring retainer to
18 to 22 foot-pounds / 24 to 30 N•m.
Diaphragm Maintenance
Key numbers are referenced in Figures 7, 8, 9, 10,
and 12.
1. Back out the adjusting screw or handwheel (key 18)
until compression is removed from the spring (key 17).
2. Remove the ange screws (key 3) to separate
the spring case assembly (key 7) from the body
(key 1). Remove the upper spring seat (key 20)
and the control spring (key 17).
3. Remove the diaphragm assembly (key 16),
inspect the diaphragm, and replace the assembly,
if necessary.
POSITION 3
POSITION 4
GE31784
POSITION 1 (ALIGNED WITH INLET) (STANDARD)
Figure 6. 167D Series Spring Case Vent Positions
POSITION 2
4. Place the diaphragm assembly (key 16) on the body
(key 1) as shown in Figures 7 through 10. Push down
on the diaphragm assembly to make sure the valve
plug (key 57) strokes smoothly and approximately
1/16-inch / 1,6 mm.
Note
In step 5, if installing a control spring of
a different range, be sure to delete the
spring range originally appearing on the
label and indicate the new spring range.
5. Stack the control spring (key 17) and upper spring
seat (key 20) onto the diaphragm assembly (key 16).
6. Install the spring case assembly (key 7) on the body
(key 1) with the vent oriented to prevent clogging or
entrance of moisture. Install the six ange
screws (key 3) using a crisscross pattern and torque
to 15 to 30-inch-pounds / 1,7 to 3,4 N•m.
Note
On Types 167DS and 167DAS, lubricate
the adjusting screw (key 18) thread to
reduce galling of the stainless steel.
7. When all maintenance is complete, refer to
the Startup and Adjustment section to put the
switching valve back into operation and adjust
the pressure setting. Tighten the hexnut (key 19)
if used, and install the closing cap (key 33) if used.
7
167D Series
Parts Ordering
When corresponding with the local Sales Ofce about
this switching valve, include the type number and
all other pertinent information printed on the label.
Specify the eleven-character part number when
Brass/Nitrile (NBR) seat and plug assembly R167DX00012
Types 167D NACE, 167DS, and 167DS NACE
316L Stainless steel/Nitrile (NBR) seat and
plug assembly R167DSX0N12
Types 167DA and 167DAS - Includes O-ring
(key 14), two seats (key 58), plug assembly
(keys 50, 57, 11, 64), and diaphragm
assembly (key 16).
Type 167DA
Brass/Nitrile (NBR) seat and plug assembly R167DAX0022
Types 167DA NACE, 167DAS, and 167DAS NACE
316L Stainless steel/Nitrile (NBR) seat and
plug assembly R167DASXN22
1 Body
1/4 NPT (Ports A and C)
Type 167D or 167DA, Aluminum GE35383X012
Type 167DS or 167DAS,
CF3M/CF8M Stainless steel GE35385X012
1/2 NPT (Ports A and C)
Type 167D or 167DA, Aluminum GE31787X012
Type 167DS or 167DAS,
CF3M/CF8M Stainless steel GE31804X012
3 Flange Screw
Types 167D and 167DA For Standard spring case and spring case
with 1/4 NPT vent (6 required), Zinc-plated steel T13526T0012
For Standard Spring Case (6 required),
316/316L Stainless steel T13526T0042
For wire seal
Nitrile(NBR)/Polyester T14119T0062
Fluorocarbon(FKM)/Polyester T14119T0072
Type 167DA
Nitrile(NBR)/Brass T14119T0112
Nitrile(NBR)/316L Stainless Steel T14119T0122
Fluorocarbon(FKM)/316L Stainless Steel T14119T0132
Type 167DAS
Nitrile(NBR)/316L Stainless Steel T14119T0122
Fluorocarbon(FKM)/316L Stainless Steel T14119T0132
17 Control Spring See Tables 1 and 2
18 Adjusting Screw
Types 167D and 167DA
Zinc-plated steel (For standard spring case)
Square head (standard) T14061T0012
Handwheel T14102T0012
Wire seal (not shown) T14104T0012
Zinc-plated steel (For spring case with
1/4 NPT vent)
Square head for closing cap T14101T0012
Handwheel T14103T0012
Wire seal (not shown) T14198T0012
316 Stainless Steel
(For Spring case with 1/4 NPT vent)
Square head for closing cap T14101T0022
Types 167DS and 167DAS Square head with or without closing cap,
316L Stainless steel T14101T0022
Handwheel, Zinc-plated steel T14103T0012
19 Hexnut
Types 167D and 167DA
Zinc-plated steel 1A946324122
316 Stainless steel 1A9463X0042
Types 167DS and 167DAS
316 Stainless steel 1A9463X0042
20 Upper Spring Seat
Types 167D and 167DA, Zinc-plated steel T14051T0012
Types 167DS and 67DAS, 316 Stainless steel 10C1725X012
Emerson Process Management
Regulator Technologies, Inc.
USA - Headquarters
McKinney, Texas 75069-1872, USA
Tel: +1 800 558 5853
Outside U.S. +1 972 548 3574
Asia-Pacic
Shanghai 201206, China
Tel: +86 21 2892 9000
Europe
Bologna 40013, Italy
Tel: +39 051 419 0611
Natural Gas Technologies
Emerson Process Management
Regulator Technologies, Inc.
USA - Headquarters
McKinney, Texas 75069-1872, USA
Tel: +1 800 558 5853
Outside U.S. +1 972 548 3574
Asia-Pacic
Singapore 128461, Singapore
Tel: +65 6777 8211
Europe
Bologna 40013, Italy
Tel: +39 051 419 0611
TESCOM
Emerson Process Management
Tescom Corporation
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-Pacic
Shanghai 201206, China
Tel: +86 21 2892 9499
Gallardon 28320, France
Middle East and Africa
Tel: +33 2 37 33 47 00
Dubai, United Arab Emirates
Tel: +971 4811 8100
For further information visit www.sherregulators.com
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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 specications of such
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