The Series PBV Automated Ball Valves - 2-Way Plastic is ideal for service in
industrial, chemical, turf and irrigation, and pool and spa applications, as well as for
use with potable water. The valve features a shear-proof stem designed to prevent
leakage in the event of damage, reinforced TFE seats and EPDM seals for longer
life, and an all-plastic construction (PVC or CPVC) for heavyweight durability at a
lightweight cost. Valves also come standard with selectable NPT or socket process
connections.
The PBV is an economical automated valve package with either an electric or
pneumatic actuator. Electrically actuated models are weatherproof, NEMA 4, powered
by standard 115 VAC supply, and are available in either two-position or proportional
control. Two-position actuators use the 115 VAC input to drive each of the valve ports
open or closed, while the modulating actuator accepts a 4-20 mA input for innite valve
positioning. Actuator features include thermal overload protection to withstand stall
conditions, visual position indication and a permanently lubricated gear train.
The pneumatic double acting actuator uses an air supply to drive each of the actuator
ports. Spring return pneumatic actuators use the air supply to drive the valve stem one
direction, and internally loaded springs return the valve to its original position. Also
available is the SV3 solenoid valve to electrically switch the supply pressure between
the air supply ports. Actuators are constructed of anodized aluminum and are epoxy
coated for years of corrosion free service.
DWYER INSTRUMENTS, LLC
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
SPECIFICATIONS
Service: Compatible liquids or gases.
Body: 2-way.
Line Size: 1/2˝ to 4˝.
End Connections: Female NPT or socket (for 1/2˝ through 2˝); Socket only (for 2-
1/2˝ through 4˝).
Pressure Limit: 1/2˝ to 2˝: 232 psi (16.0 bar) @ 73°F (23°C); 2-1/2˝ to 4˝: 150 psi
(10.3 bar) @ 73°F (23°C) WOG. Vacuum: 29˝ Hg.
Wetted Materials: Body, End Connectors: PVC or CPVC; Ball, Stem: PVC or
CPVC; Seat: TFE; Stem Seal: EPDM.
Temperature Limit: 32 to 140°F (0 to 60°C).
Other Materials: Stem Bearing: Polypropylene (1-1/4˝ and up).
ACTUATORS
Electric Power Requirements: 120 VAC, 50/60 Hz, single phase. Optional 220
VAC, 24 VAC, 12 VDC, and 24 VDC.
Power Consumption: (Locked Rotor Current): Two Position: 1/2˝ to 1-1/2˝: .55A,
2˝ to 4˝: 0.75A. Modulating: 1/2˝ to 2˝: 0.75A, 2-1/2˝: 1.1A, 3˝ and 4˝: 0.75A.
Cycle Time: (per 90°): Two Position: 1/2˝ to 1-1/2˝: 2.5 s, 2˝ and 2-1/2˝: 5 s,
3˝ and 4˝: 15 s. Modulating: 1/2˝ to 2-1/2˝: 5 s, 3˝ and 4˝: 15 s.
Duty Cycle: Two Position: 1/2˝ to 1-1/2˝: 75%, 2˝ to 4˝: 25%. Modulating: 75%.
Enclosure Rating: NEMA 4. Optional NEMA 7 (Class 1, Div. II groups A, B, C,
D).
Housing Material: Aluminum with thermal bonding polyester powder nish.
Temperature Limit: 0 to 150°F (-18 to 65°C).
Conduit Connection: 1/2˝ female NPT.
Modulating Input: 4-20 mA.
Standard Features: Manual override and visual position indicator except
modulating units.
Pneumatic “DA” and “SR” Series
Type: DA series is double acting and SR series is spring return (rack and pinion).
Normal Supply Pressure: 80 psi (5.5 bar).
Maximum Supply Pressure: 120 psig (8 bar).
Air Connections: 1/4˝ female NPT.
Air Consumption (per stroke): (per stroke) DA1: 2.32 cu. in; DA2: 9.34 cu. in;
1. Operate valve manually and place in the open position. (Note: ALL ELECTRIC
ACTUATORS ARE SHIPPED IN THE OPEN POSITION.)
2. Remove any mechanical stops the valve might have. (DO NOT REMOVE ANY
PARTS NECESSARY FOR THE PROPER OPERATION OF THE VALVE, SUCH
AS THE PACKING GLAND, PACKING NUT, ETC.)
3. Ensure that the actuator output shaft and valve stem are aligned properly. If they
are not, operate the valve manually until they are correct.
4. Mount actuator to valve. Do not tighten nuts and bolts at this time.
5. Remove actuator cover.
6. Bring power to the actuator. CAUTION: Make sure power is OFF at the main box.
7. Wire the actuator per the diagram attached to the inside of the cover. Special
actuators (those with positioner boards, etc.) will have diagrams enclosed inside
the cover.
8. Securely tighten bolts used to mount the actuator to a mounting bracket or directly
to the valve mounting pad if it is ISO5211 compliant.
9. Cycle the unit several times and check the open and closed positions of the valve.
Cams are pre-adjusted at the factory; due to the variety of valve designs and types,
however, slight adjustments might be required. (SEE II and III).
10. Replace cover and tighten screws.
II. To Set the Open Position
1. Cycle the valve to the open position by applying power to terminals #1 and #2. The
top cam and switch control this position. In the open position, the set screw in the
top cam will be accessible.
2. If the valve is not open completely:
A. Slightly loosen the 8-32 x 1/4˝ set screw on the top cam.
B. Rotate the cam clockwise (CW) by hand until the switch makes contact.
Contact is made when a slight click can be heard. By making incremental CW
movements of the top cam, the valve can be positioned precisely in the desired
position.
C. When the top cam is set, tighten the set screw securely.
3. If the valve opens too far:
A. Apply power to terminals #1 and #3. This will begin to rotate valve CW. When
valve is full open and in the exact position desired, remove power from actuator.
B. Loosen the set screw in the top cam.
C. Rotate the top cam counterclockwise (CCW) until the switch arm drops off the
round portion of the cam onto the at section. A slight click can be heard as the
switch changes state.
D. Continue applying power to terminals #1 and #3 until valve is in the desired
position.
III. To Set the Closed Position
1. Apply power to terminals #1 and #3 to move the valve toward the closed position.
The bottom cam and switch control the closed position. In the closed position, the
set screw in the bottom cam will be accessible.
2. If the valve is not closed completely:
A. Slightly loosen the 8-32 x 1/4˝ set screw on the bottom cam.
B. Rotate the cam counter-clockwise (CCW) by hand until the switch makes
contact. Contact is made when a slight click can be heard. By making
incremental CCW movements of the bottom cam, the valve can be positioned
precisely in the desired position.
C. When the top cam is set, tighten the set screw securely.
3. If the valve closes too far:
A. Apply power to terminals #1 and #2. This will begin to rotate valve CCW. When
valve is fully closed and in the exact position desired, remove power from
actuator.
B. Loosen the set screw in the top cam.
C. Rotate the top cam clockwise (CW) until the switch arm drops off the round
portion of the cam onto the at section. A slight click can be heard as the switch
is no longer making contact with the round part of the cam.
D. Continue applying power to terminals #1 and #2 until valve is in the desired
position.
VII. Mechanical Overload
All actuators are designed to withstand stall conditions. It is not recommended to
subject the unit to repeated stall conditions.
VIII. Spare Parts
When ordering parts, please specify:
A. Model #
B. Serial #
C. Part Description
Recommended spare parts include:
A. Standard actuator: set of cams and switches.
B. Actuators with positioner: set of cams and switches; 1K potentiometer; valve
positioner board.
IX. NEMA 7 Electric Actuators
In general, operation and maintenance of a NEMA 7 electric actuator is no different
that of a NEMA 4 actuator. However, some precautions must be followed:
1. DO NOT under any circumstances remove the cover of the actuator while in a
hazardous location. Removal of the cover while in a hazardous location could
cause ignition of hazardous atmospheres.
2. DO NOT under any circumstances use a NEMA 7 electric actuator in a hazardous
location that does not meet the specications for which the actuator was designed.
3. Always mount and cycle test the actuator on the valve in a non-hazardous location.
4. When removing the cover, care must be taken not to scratch, scar of deform the
ame path of the cover and base of the actuator, since this will negate the NEMA
rating of the enclosure.
5. When replacing the cover on actuators rated for both NEMA 4 and 7, take care that
the gasket is in place to assure proper clearance after the cover is secured. After
the cover screws are tightened, the clearance between the cover and the base
should be checked. A .002˝ thick by 1/2˝ wide feeler gauge is used for this; it must
not enter between the two mating faces more than .125˝.
6. All electrical connections must be in accordance with the specications for which
the unit is being used.
7. Should the unit ever require maintenance, remove from the hazardous location
before attempting to work on the unit. If the actuator is in a critical application, it is
advisable to have a standby unit in stock.
XI.Troubleshooting
SymptomProblemSolution
Actuator does not
respond to
control signal
Actuator will not
open and/or close
completely
Valve oscillates• Torque of valve too high
Actuator motor
runs but output
shaft does not
rotate
• Power is not on
• Actuator wired incorrectly
• Incorrect voltage
• Thermal Overload
• Actuator and Valve in
opposite positions when
actuator installed
• Travel limit switch set
incorrectly
• Valve torque too high
• Mechanical stops not
removed when installing
actuator
• Actuator without brake
installed on buttery valve
• Motor brake misadjusted
• Gear damaged/sheared pin • Contact factory
• Turn on Power
• Check wiring diagram;
re-wire
• Bring correct supply to
actuator
• Allow motor to cool; resets
automatically
• Remove actuator; remount
after 90° turn
• Set cams per instructions
• Install correct unit
• Remove stops
• Torque of valve too high
• Install brake
• Adjust brake; tighten screw
IV. Maintenance
Once the actuator has been properly installed, it requires no maintenance. The gear
train has been permanently lubricated and in most cases will never be disturbed. In
the event it becomes necessary to open the gear box for any reason, however, Shell
Darina #2 grease is recommended for re-lubricating.
V. Duty Cycle
Most standard electric actuators are rated for 25% duty cycle at 100% ambient
temperature at the rated torque.
VI. Thermal Overload
All actuators are equipped with thermal overload protection to guard the motor against
damage due to overheating.
Page 4
PNEUMATIC ACTUATOR
Note: For optimal operation, PBV actuators should be run with a supply of clean,
lubricated air.
SPRING RETURN ACTUATORS
WARNING
may change position if power fails or is removed. Never insert any object or body part
into the valve body. Severe injury may occur.
Air to PORT 2 (the right hand port) causes the actuator to turn CCW. Loss of air to
PORT 2 causes air to exhaust and the actuator turns CW. This is the FAIL CLOSE
operation.
DOUBLE ACTING ACTUATORS
Air to PORT 2 (the right hand port) causes the actuator to turn CCW. Air to PORT 1 (the
left hand port) causes the actuator to turn CW.
DISASSEMBLING STANDARD ACTUATORS
IMPORTANT: Before beginning disassembly, ensure that the air supply to the actuator
has been disconnected, all accessories have been removed and that the actuator has
been dismounted from the valve.
1. Loosen the end cap fasteners (22) with a wrench (size varies depending on actuator
model). On the spring return actuator, alternate 3 to 5 turns on each fastener until
the springs are completely decompressed. Use caution in removing the cap since
the springs are under load until the fasteners are fully extended.
2. Remove the pinion snap ring (10) with a lock ring tool. The indicator (7) may now
be removed.
3. Turn the pinion shaft (2) CCW until the pistons are at the full end of travel.
Disengage the pistons (11) from the pinion. (Note: Low pressure air--3 to 5 psi.
MAXIMUM--might be required to force the pistons completely from the body.) Note
the position of the pistons before removing them from the actuator body. The part
numbers of the pistons are located on the side and should be right-side up on an
actuator with a standard orientation.
4. Remove the pinion through the bottom of the actuator. The actuator is now
completely disassembled. All replacement parts may now be put in. W.E. Anderson
recommends that all wear parts (3, 4, 5, 6, 12, 13, 14) be replaced before
reassembly.
When working on the Actuator/Valve assembly, disconnect the air
or power supply to the actuator. Spring return actuators/valves
REASSEMBLING STANDARD ACTUATORS
IMPORTANT: Be sure that the actuator surfaces are free of grit and scratches
before reassembling.
1. Apply a light lm of grease to all o-rings and the pinion before replacing.
2. Put the pinion (2) back through the actuator with the ats of the pinion shaft running
parallel with the body.
3. When reassembling the actuator, make sure that the piston racks are square to the
actuator body and returned to their original orientation. (Note: The normal operation
of all PBV pneumatic actuators is FAIL CLOSED. To change the orientation to FAIL
OPEN, rotate the racks 180º to create a reverse operation.)
4. When replacing springs in a spring return actuator, ensure that the springs are
replaced in their identical position in the end cap from which they were removed.
(Note: In some circumstances, you might want to change the standard 80 pound
spring set to t your application and available air pressure. Changing the spring
sets on PBV pneumatic actuators requires no special tools. Please refer to the
spring combination torque chart in our catalog for the inner and outer spring
combinations that will allow you to operate with the spring set that you desire.)
5. Seal the end caps with a petroleum lubricant and bolt to actuator body.
6. Check the seal of the actuator by covering seal areas (pinion, end caps) with soapy
water and using low pressure air to the actuator to ensure that no bubbles are
produced.
MAINTENANCE
The Series PBV Automated Ball Valves are not eld serviceable and should be returned
if repair is needed (eld repair should not be attempted and may void warranty). Be
sure to include a brief description of the problem plus any relevant application notes.
Contact customer service to receive a return goods authorization number before
shipping.
DWYER INSTRUMENTS, LLC
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.