Section 15101
VALVE OPERATORS
PART 1 - GENERAL
1.1 THE REQUIREMENT
A. This section includes requirements
for power operated actuators and power gate operators. The actuator
requirements are shown on Drawings. The CONTRACTOR shall furnish and
install the valve actuators shown on the Drawings, complete and
operable, including all controls, motors, gears, etc., in accordance
with the requirements of the Contract Documents. An actuator schedule
is provided for reference only; the CONTRACTOR shall obtain the count
of actuators from the Drawings.
B. Actuators and their
appurtenances shall be suitable for the intended operating
conditions and suitable for the requirements of operating their
respective valves or gates.
C. The actuator manufacturer shall
have at least (5) five years of experience in the production of
similar valve actuators.
1.2 RELATED WORK SPECIFIED
ELSEWHERE
A. The requirements of the following
sections and divisions apply to the Work of this section. Other
sections and divisions of the Specifications, not referenced below,
shall also apply to the extent required for proper performance of
this Work.
1. Section 01810, Commissioning
2. Section 01820, Training of OCSD
Personnel
3. Section 09800, Protective Coatings
4. Section 15100, Valves, General
5. Section 16220, Electric Motors
6. Section 17300, Control Strategy
7. Section 17405, Process
Instrumentation and Control
1.3 REFERENCE SPECIFICATIONS,
CODES AND STANDARDS
A. All Work specified herein shall
conform to or exceed the applicable requirements of the referenced
portions of the following publications to the extent that the
provisions thereof are not in conflict with other provisions of these
Specifications.
B. Comply with the applicable
editions of the following codes, regulations and standards.
CCR
California Code of Regulations, Title 8 for Electrical
Safety Orders
AWWA, C540
American Water Works Association
ANSI
American National Standards Institute ASME
American Society of Mechanical Engineers ISA
Instrument Society of America
FCC Part 15
NFPA 70
National Electrical Code, latest version
NFPA 79
Electrical Standard for Electrical Machinery
1.4 CONTRACTOR SUBMITTALS
A. Submittals shall be made in
accordance with the General Requirements and
Additional General Requirements.
B. OCSD shall be provided a list of
references of existing actuator installations including the contact
person’s name and phone number and shall submit evidence of
satisfactory operation in at least five municipal wastewater
installations of similar scope and usage.
C. Motor and gear type information.
D. Design Data:
1. Submit operating thrust and
torque calculations for each gate size and operating head.
2. Submit data to substantiate motor
horsepower and operating times.
3. Submit data verifying actuator
stall torque will be no more than 85 percent of the drive stem’s
shear strength, torque capacity and thrust capacity.
4. Submit proposed actuator
configuration and dimensions for each different actuator type.
E. Shop Drawings, Wiring Diagrams,
and Product Data. F. Manufacturer’s Published Instructions.
G. Operating and Maintenance Manuals.
H. Warranty:
1. For electric, 3 phase
actuators only, certified copies of proof-of-design test
report(s) as set forth in AWWA C540 Section 6, together with
affidavit(s) of compliance as indicated in AWWA C540 Section 1.7
shall be submitted to OCSD before the actuators are shipped.
2. A written manufacturer’s
warranty shall be provided for the equipment specified in this
section. Warranty on the valve actuators shall be for a minimum
period of two (2) years from the date of operational start-up and
OCSD acceptance. Such warranties shall cover all defects or failures
in materials or workmanship that occur as the result of normal
operation and service. The manufacturer shall be responsible for all
replacement or repair costs of materials, labor for removal at
OCSD’s site and re-installation at OCSD’s site. Warranty work
related to standard items shall be completed within 15 calendar
days. This warranty timeframe shall start from the date of
notification by OCSD to the CONTRACTOR.
3. An absolute encoder shall be used
to sense valve position in both motor and hand wheel operation and
shall not require battery backup.
1.5 QUALITY ASSURANCE
A. All internal wiring of motor
actuators shall be individually identified with a unique number.
The assigned internal wiring number shall match the manufacturer’s
documentation.
B. It is the responsibility of the
CONTRACTOR to coordinate the requirements of this section with those
involving both electrical and instrumentation specifications.
C. All adjustments, calibration,
and/or testing shall be done in the presence of
ENGINEER or INSPECTOR.
D. Integration of the valve and
actuator shall be the responsibility of the valve manufacturer.
Reference Section 15100, Valves, General.
E. The product supplied for each
type of actuator shall all be of the same model number from the same
manufacturer.
F. All actuators of the same model
number shall have identical internal wiring colors, marking and
routing.
PART 2 - PRODUCTS
2.1 GENERAL REQUIREMENTS – ALL
ACTUATORS
A. All actuators shall be
supplied with remote controls if the valve and actuator
assembly is mounted in a defined “confined space”, if integral
controls would be out of reach to an operator standing at floor
level at the actuator, or if required in the Drawings.
B. All actuators shall be supplied
with a remote mounted safety disconnect switch lock- out/tag-out
use. This disconnect shall provide an auxiliary contact rated to
break external control power that may be fed to the actuators
monitoring limit switches.
C. All actuators shall have a
mechanical local valve position indicator that does not depend upon
power being present to be visible from the normal operating
position.
D. Valve position sensing shall be by
an absolute encoder that measures valve position in both motor and
hand wheel operation. No battery or back-up power shall be required.
E. All actuator mounting hardware,
brackets and all attaching fasteners shall be 316 stainless steel.
F. All actuators shall provide a
fail mode per the valve actuator schedule such as Fail Open (FO),
Fail Closed (FC), Fail Last Position (FLP), or Not Applicable (NA).
A fail position that is not defined shall be clarified through the
project Request for Information (RFI).
G. Actuator shall include stem
protection for rising stem type valves.
2.2 ELECTRIC MOTOR ACTUATORS –
THREE PHASE POWER OPERATION A. General Requirements:
1. The actuator shall meet
applicable requirements of the AWWA.
2. Motor stall torque shall not
exceed the torque withstand capability of the valve. In addition,
the actuator’s torque output shall be at a minimum no less than
140 percent of the torque required by the valve’s operating
conditions of fluid, flow and pressure.
3. Actuator + Gear Train operating
turns shall be matched to the valve. Use 1/4 turn actuators on 1/4
turn valve and multi-turn actuators on multi-turn valves.
4. Actuator/Valve assembly shall be
fitted with a re-lubrication mechanism for the stem threads on
rising stem type valves.
5. All valve actuators shall comply
with the minimum and maximum valve operating time capabilities
listed in the Valve Actuator Schedule. Slide gate actuators shall be
able to operate at a minimum rate of 12 inches/minute.
6. Unless otherwise specified in the
Valve Actuator Schedule, the actuator supply voltage shall be 480V,
3 phase, 60 Hz.
7. The actuator shall be able to be
stored prior to installation without the need for temporary
electrical power being applied for the warranty to remain valid or
for any factory programming to be retained.
8. Each actuator shall be supplied
with a “start-up” kit consisting of installation instructions,
wiring diagrams, programming information and spare cover
screws (unless hardware is captive) and seals to allow for site
losses that may occur during installation and commissioning.
9. The actuator controls and
electronics shall operate satisfactorily with power deviations of
plus or minus 10 percent of nominal rated voltage and frequencies
deviations between 58-62 Hz.
10. The actuator and controls shall be
capable of mounting in any orientation in the field without any
adverse operating effects or lubricant leakage.
11. Alarms from the actuators shall be
provided as shown on the electrical drawings. An alarm shall not be
generated when the Local/Remote selector switch is placed in the
Local position from the Remote position, nor should the alarms be
inhibited when the Local/Remote selector switch is placed in the
Local position.
12. The actuator shall be fitted with
a phase correction device to ensure the actuator runs in the
correct direction, plus a device to protect the motor against
‘single phasing”
B. Gears, Bushings and Bearings:
1. The actuator shall have a
reduction gear ratio that prevents valve shaft rotation from
backdriving the operating motor.
2. The gear train for any actuator
shall be suitable for and rated for that type operation.
3. Non-metallic, aluminum or cast
gears are not acceptable without OCSD written acceptance. If these
are submitted through submittal process special attention shall be
drawn of the reviewer.
4. All gear trains shall be grease
or oil lubricated from the factory, in a sealed housing. ‘Dry’
type lubricants may be used only with OCSD prior acceptance.
5. Bearing and gear technologies
used in the actuator head shall be rated for a 20 year service life.
6. Stem bushing length for slide and
sluice gate operators shall be 2.5 times the drive stem diameter.
7. Driven stem nuts shall be of
high tensile strength manganese or aluminum bronze and have a
minimum thread engagement not less than 1-1/2 times the stem
diameter.
8. Actuator gear ratio changes shall
be available from the factory.
9. Mechanical safety devices such as
a shear-pin or roll-out clutch shall be field resettable or
replaceable without requiring tools for disassembly of the unit.
C. Actuators for Open-Close Service:
1. The actuator shall allow the
valve to be stopped in intermediate positions.
2. The actuator shall include eight
integral, adjustable limit switches to indicate valve positions per
the following table:
|
|
|
Intermediate
Position |
|
|
SCADA, ZSCxxx |
Closed |
Opened |
Opened |
|
SCADA, ZSOxxx |
Opened |
Opened |
Closed |
|
Local light, ZLCxxx |
Closed |
Closed |
Opened |
|
Local light, ZLOxxx |
Opened |
Closed |
Closed |
|
Adjustable spare |
TBD |
TBD |
TBD |
|
Adjustable spare |
TBD |
TBD |
TBD |
|
Adjustable spare |
TBD |
TBD |
TBD |
|
Adjustable spare |
TBD |
TBD |
TBD |
3. Actuators shall be capable of
cycle rates specified in the actuator schedule.
4. Actuators, for Open/Close duty
shall include a starting assist feature to facilitate and overcome
valve startup restriction and seat breakaway operation as specified
in the Valve Actuator Schedule.
D. Actuators for Modulating Service:
Modulating actuators shall incorporate the General Requirements of
paragraph 2.1 for 3 phase actuators, except where otherwise
stated. Additionally, they shall include the following features:
1. Actuator shall provide valve
absolute position feedback (4-20ma dc) via an isolated,
non-contact transducer. This shall indicate true valve position
after recovery from a power outage during which the valve position
has been manually changed.
2. The actuator shall allow for an
Emergency Shutdown Signal to set the valve to the position indicated
in the Valve Actuator Schedule, open, close or stay in last
position.
3. Actuator shall accept an external
Open/Close signals, or 4-20 ma dc signal
(source voltage between 18 to 36 vdc)
to control the valve position per the drawings.
4. Actuator shall be capable of the
number of position changes per hour indicated in the Valve Actuator
Schedule. Actuators requiring more than an average 100 starts per
hour shall be fitted with Solid State starter capable of 1200 starts
per hour and shall be fitted with a Class H insulation motor rated
for 30 minute duty, plus the starting assistance (hammer action)
shall be replaced by direct drive.
5. The actuator shall provide a 4-20
mA signal to indicate valve position.
6. Actuator shall accept maintained
digital open/close commands also.
7. Actuator shall include four
integral, adjustable limit switches to indicate valve positions per
the following table:
|
|
|
Intermediate
Position |
|
|
Adjustable spare |
TBD |
TBD |
TBD |
|
Adjustable spare |
TBD |
TBD |
TBD |
|
Adjustable spare |
TBD |
TBD |
TBD |
|
Adjustable spare |
TBD |
TBD |
TBD |
E. Actuator Controls:
1. The actuator shall have the
following torque features:
a. Incorporate adjustable operating
torque sensing to stop valve travel when the set torque level is
exceeded. Extrapolating torque from motor speed is not
acceptable.
b. Actuator control shall provide
the option of bypassing the torque sensing (i.e. NOT be active)
during valve breakaway.
c. Control Features shall be as
specified in the valve actuator table.
d. The actuator shall be capable of
Remote Control by maintained contact closures, where valve open or
close movement occurs while the remote open or close contact remains
closed.
e. Actuators shall have local
selector switch and pushbuttons that include LOCAL-OFF-REMOTE,
OPEN-STOP-CLOSE to operate the valve, or via a hardwired local
control station while this local station is in LOCAL and the
actuator is in REMOTE.
f. The actuator shall have
indicator lights and an electronic display to indicate FULL OPEN,
FULL CLOSED, INTERMEDIATE valve positions shown as percentage of
open, in 1% increments, and FAIL status. All lights and/or display
screens shall be sunlight readable and backlit for night time
readability.
g. The actuator shall incorporate
motor anti-plugging functions to prevent damage to the motor
and gears if the actuator is commanded to change direction
instantly.
h. The internal actuator control
transformer shall develop all required worst- case internal control
voltages plus a minimum of 120 VAC, 15 VA to be utilized by OCSD as
contact wetting voltage. If the actuator’s internal control
transformer cannot supply the voltage and/or power required for
external signaling, the manufacturer may provide an external
combination disconnect/transformer to meet this requirement.
i. ACCURACY, REPEATABILITY,
HYSTERESIS, BACKLASH AND LINEARITY for modulating service relating
to the actuator travel of 0 to 100 percent opened shall be as
follows:
1) Positioning error of the
actuator’s absolute position shall be plus or minus 1 percent
or less.
2) Position feedback error of the
actuator’s absolute position shall be plus or minus 1 percent or
less.
3) Repeatability error after a
minimum movement of 5 percent movement shall be plus or minus 1
percent or less.
4) Hysteresis and backlash in any
internal gear train and driving mechanics shall be less than plus or
minus 1 percent
F. Monitoring Signals:
1. The actuator shall include a
minimum of five isolated (relay) status contacts rated
5A at 120 vac that are suitable for
interlocking and/or SCADA PLC monitoring. The actuator shall provide
the following signals and functions:
a. Actuator mode selector switch in
REMOTE. b. Actuator motor ON.
c. Valve fully OPENED.
d. Valve fully CLOSED.
e. ACTUATOR FAIL, a common trouble
alarm that includes internal diagnostic fail, lo battery (if present
in the design), jammed valve, loss of phase or overload. This
contact shall be configured fail-safe, closed for normal
conditions and opened upon fault or trouble. The cause of the
ACTUATOR FAIL shall be shown on the actuator LCD Display. The
actuator shall not give trouble alarm if three phase power is lost or
the Local/Remote/Off position switch is not in remote.
G. Enclosure:
1. The actuator enclosure shall have a
NEMA Type 4X/NEMA Type 6 fully submersible to IP68 minimum rating.
For classified areas, the actuator enclosure shall be rated NEMA 7.
2. The actuator shall utilize an
internal space heater for the prevention of internal condensation.
3. The enclosure shall have a
separate sealed area for user terminations. The terminations area
shall be further separated from the electrical/electronics section by
an additional seal.
4. All sliding or rotating shafts and
controls that penetrate the enclosure shall be provided with O-ring
seals.
5. The enclosure shall allow access
to test internal voltages and functions of the actuator while
energized. A non-invasive or non-contact communications device may be
used to download or upload actuator setup and diagnostic data as an
acceptable alternative to opening the controls/terminations area
for setup, adjustments and testing. Any information
uploaded/downloaded and setting made to the actuator shall be
available to be saved in electronic form for future diagnostics,
review and used, including printing when required.
6. The terminations area for
OPEN/CLOSE service actuators shall be provided with a minimum of two
(2) standard threaded cable/conduit entrances. The terminations area
for MODULATING service actuators shall be provided with a minimum of
three (3) standard threaded cable/conduit entrances. The conduit
entrance thread system, cable glands, blank-off plugs and shaft seals
shall be gas and liquid tight to 0.5 atmospheres. All the
terminations shall be screwed connections, shall be accessible once
cover is opened and shall retain power to all control circuit for
trouble shooting purpose.
7. The actuator shall comply with FCC
Part 15 requirements for Class A devices. The actuator electronics
shall not generate RFI/EMI levels beyond the Part 15 limits for Class
A (industrial) devices and shall not malfunction if the actuator
receives RFI/EMI from OCSD equipment such as UHF/VHF handheld radios
or VFD’s.
H. Hand Wheel Operation:
1. A permanently attached hand wheel
or crank shall be provided for emergency manual operation.
2. The hand wheel or crank shall not
rotate during electrical operation. During manual operation, the
hand wheel shall be de-clutched from the actuator’s internal gear
train and remain de-clutched until the motor is re-energized.
a. The de-clutching mechanism shall
be padlockable in the de-clutched position and shall be provided
with a chain operator for valves installed 6 feet or higher from the
operating floor. The chain end shall be four feet from the floor
level and shall contain a hook to latch it away from the operating
space up on the chain itself.
b. Simultaneous motor and hand wheel
operation shall not be allowed.
3. The maximum torque required on
the hand wheel or crank under the most adverse conditions of fluid,
flow and pressure shall not exceed 40 pounds of rim pull.
4. A directional arrow or the word
"open" or "close" shall be cast in the hand
wheel actuator housing to indicate the direction of operation.
Unless specified otherwise elsewhere, clockwise hand wheel operation
shall close the valve.
5. Valve actuators mounted higher
than 6 feet above working level shall be provided with chain
operators. Chain operators shall have hot-dip galvanized chain
extending to within 4 feet from the floor. Where chain operators
are provided a “Chain Away” PVC chain storage canister shall be
furnished. The canister shall have a screened bottom for drainage
and a handle to pull the container down by extending the chain
length out of the canister. Canisters shall be Model “Chain Away”
by Babbitt STEAM SPECIALTY, Roto Hammer Industries, Or Equal.
I. Manufactures, Or Equal (in
alphabetical order only):
1. Limitorque, Accutronix MX Series.
2. Rotork Controls Inc., IQ Series.
2.2 ELECTRIC MOTOR ACTUATORS –
SINGLE PHASE POWER OPERATION A. General Requirements:
1. The valve actuator shall comply
with the recommendations of AWWA C540.
2. Motor stall torque shall not
exceed the torque withstand capability of the valve. In addition,
the actuator’s torque output shall be at a minimum no less than
140 percent of the torque required by the valve’s operating
conditions of fluid, flow and pressure.
3. Actuator + Gear Train operating
turns shall be matched to the valve. Use 1/4 turn actuators on 1/4
turn valve and multi-turn actuators on multi-turn valves.
4. All valve actuators shall honor
the minimum and maximum valve operating time capabilities listed in
the Valve Actuator Schedule.
5. Actuator supply voltage shall be
120V or 240V, 1 phase, 60 Hz, as specified in the Valve Actuator
Schedule.
6. The actuator controls and
electronics shall operate satisfactorily with power deviations of
plus or minus 10 percent of nominal rated voltage and frequencies
deviations between 58-62 Hz.
7. The actuator shall be capable of
mounting in any orientation without any adverse operating effects or
lubricant leakage.
8. The actuator motor shall have
built-in overload protection or be impedance limited.
B. Gearing:
1. The actuator shall have a
reduction gear ratio that prevents valve shaft rotation from
backdriving the operating motor.
2. The gear train for any actuator
shall be suitable for and rated for that type operation.
3. All gear trains shall be grease
or oil lubricated, in a sealed housing. ‘Dry’ type lubricants
may be used only with prior OCSD acceptance.
4. Bearing and gear technologies
used in the actuator head shall be rated for a 20 year service life.
C. Actuators for Open-Close Service:
1. Actuator shall include integral
end-of-travel limit switches to indicate full opened and full
closed.
D. Actuators for Modulating Service:
1. The actuator motor shall be rated
for continuous modulating service without overheating.
2. The actuator shall accept
external Open/Close or 4-20 ma dc signal (source voltage between 18
to 36 vdc) to control the valve position per the drawings.
3. The actuator shall provide valve
absolute position feedback (4-20ma dc) via an isolated, non-contact
transducer per the Valve Actuator Schedule. This shall indicate true
valve position after recovery from a power outage during which the
valve position has been manually changed.
E. Enclosure:
1. The actuator enclosure shall be
NEMA Type 4X minimum, except in classified areas as shown on the
drawings. For classified areas the enclosure shall be rated NEMA 7.
2. The actuators shall provide
internal space heaters for the prevention of internal condensation.
3. The actuator enclosure shall
house all actuator components including the motor, reduction gearing
and interfacing limit switches.
4. The actuator shall be provided
with a valve control panel that includes operator controls for
LOCAL/OFF/REMOTE and OPEN/STOP/CLOSE as well as indicator lights for
valve fully opened and valve fully closed per the Valve Actuator
Schedule.
F. Manufactures, Or Equal, (in
alphabetical order only):
1. Flowserve (Worchester) Series 75.
2. Hayward EV Series.
3. Rotork.
2.3 PNEUMATIC ACTUATORS
A. General Requirements (Cylinder or
Diaphragm Pneumatic Actuators):
1. Pneumatic cylinder or diaphragm
actuators shall be provided where shown on
P&IDs or the Valve Actuator
Schedule.
2. The actuator shall comply with
AWWA C540.
3. The pneumatic actuator system
shall be capable of opening or closing the valve within the time
limits shown on the Valve Actuator Schedule.
4. The actuator assembly shall be
complete with control panel, air filters, regulators, mufflers,
speed control needle/check valves for opening and closing, lockable
isolation safety valves, pilot solenoids with manual override on all
4 way solenoid valves to operate without electricity, and gauges on
the supply and control pressures. The air supply shall include a
lockable valve for lock-out-tag-out use and bleed valve(s) to
relieve stored pressure.
5. The pneumatic actuator shall be
pressure range matched to the pneumatic transducer being used.
Pneumatic transducers shall not be used if the valve is required to
be monitored by a PLC.
6. Pneumatic actuators shall be able
to operate from non-lubricated, filtered, de- humidified plant
instrument air at a nominal pressure of 120 psig with variations
between 90-130 psig. The actuator sizing shall be based on a maximum
air supply of
60 psig with a safety factor of 1.25
times, sized at the valves full rated working pressure.
7. All actuator components shall be
designed, supplied and integrated by a single manufacturer.
8. Pneumatic actuators shall use 316
stainless steel rigid or braided tubing for all pneumatic
connections. Fittings shall be double ferrule style.
B. Pneumatic Actuator Cylinders:
1. The pneumatic cylinder shall meet
the requirements of AWWA C504 and C540. Cylinder barrels and end
caps shall be carbon steel, synthetic materials shall not be used.
All mechanical linkages shall be fully enclosed so as not to be a
safety hazard.
2. End of stroke cushioning shall be
provided for the cylinder stroke end points per the Valve Actuator
Schedule.
3. The cylinder material and seals
shall be per the Valve Actuator Schedule.
4. Actuator cylinders shall be
single or double acting per the Valve Actuator Schedule. In
line speed control valves shall have braes bodies with
adjustable stainless steel needle control.
5. Actuators pilot solenoid
arrangement shall be as specified in the Valve Actuator Schedule and
shall provide the Fail Open/Fail Closed or Fail Last requirements of
the Valve Actuator Schedule. The solenoid valve shall have a brass
body fitted with a single or double air piloted solenoid valve
provided with a manual over-ride
6. The scotch yoke mechanism shall
be sealed from the environment and be immersed in a grease
suitable for the application and shall have a thrust on the scotch
yoke lever arm as it moves through the 90 degree rotation.
C. Cylinder Accessories:
1. The actuator shall include
adjustable mechanical travel stops. The stops shall have 5 percent
adjustment at each end of stroke to compensate for final valve
open/close position.
2. The actuator shall have a minimum
of four limit switches to indicate valve opened and closed and to
operate indicating lights. Limit switches or their actuators shall
not be imbedded in the cylinder body or piston. For linear stroke
actuators, the valve stem/shaft shall be used for position indication
in lieu of using the actuator piston shaft for position indication.
The switches shall be in a housing that is compliant with the
required areas classification. For non-hazardous areas the housing
shall include a rotating indicator that clearly shows the actuators
position from a distance of six feet. The switch mechanism shall be
Proximity Switch, TopWorx, Westlock, Or equal.
3. The solenoid wires and the switch
shall be terminated at junction box suitable for the area
classification as shown on the drawings. The junction box shall be
mounted on the actuator.
4. Actuators for modulating service
shall include all control circuitry required to operate from a 4-20
ma dc control signal for the valve position command and be included
in the switch mechanism housing or I/P converter.
5. Actuators for modulating service
shall include a non-contact 4-20 ma dc position feedback signal. This
signal shall provide true valve position plus or minus 5 percent.
6. Actuators for modulating service
that are to be controlled from 4-20 ma dc signals shall include the
required I/P converter.
7. Actuators shall include an
operator’s control panel that provides the following:
a. The control station shall be
constructed of 316 stainless steel rated for NEMA
4X with a lockable handle.
Hazardous environments shall use a suitably constructed
enclosure for that environment.
b. A lock-out/tag-out compliant power
disconnect switch. c. OPEN/CLOSE/REMOTE selector switch.
d. Terminal block interface points
for SCADA PLC monitoring and control. e. Indicator lights for valve
position and malfunctions.
f. Surge suppressors for actuator
solenoid coils.
D. Cylinder Actuator Manufacturers,
Or Equal (in alphabetical order only):
1. Bailey Controls.
2. Flowserve (Limitorque).
3. Rotork Controls Inc.
4. Siemens (Moore Products). E.
Diaphragm Actuators:
1. The actuator housing and
diaphragm materials shall be as specified in the Valve
Actuator Schedule.
2. Actuator shall include adjustable
travel stops and a position indicator.
3. Control pressures shall be in the
range of 3-15 psig.
4. Diaphragm actuators for
modulating service that are to be controlled from 4-20 ma dc signals
shall include the required I/P converter.
5. Diaphragm actuators for
modulating service shall include a 4-20 ma dc position feedback
signal.
6. Diaphragm actuators shall be
capable of being field settable for air-fail-open or
air-fail-closed.
7. Each actuator shall be provided
with lock-out/tag-out power disconnect safety switch.
8. Actuators shall include an
operator’s control panel that provides:
a. OPEN/CLOSE/REMOTE selector
switch.
b. Terminal block interfacing points
for SCADA PLC monitoring and control. c. Indicator lights for
valve position and malfunctions.
d. Surge suppressors for actuator
solenoids.
F. Diaphragm Actuator Manufacturers,
Or Equal (in alphabetical order only):
1. Fisher Controls.
2. Masoneilan.
3. Valtek.
PART 3 - EXECUTION
3.1 INSTALLATION
A. Valve actuators are to be installed
where specified on the Drawings. The CONTRACTOR is responsible for
installation of the correct valve actuator as specified herein to
provide a complete piping system as specified. Power assisted
actuators shall have their manual operating controls located between
36 inches and 60 inches above the floor or permanent work platform
and within operators reach.
B. Performance Testing: The
CONTRACTOR shall demonstrate that each valve actuator installed
as a part of a piping system will operate under field conditions or
actual fluid, flow and pressure as designed and in the manner for
which the actuator was specified in the actuator schedule. All
testing will be witnessed and accepted by ENGINEER or the OCSD’s
Engineering Representative.
C. Provide individual test data
sheets for each actuator. Record the following parameters as a
minimum:
1. No load current.
2. Current draw at maximum torque
setting.
3. Stall current.
4. Torque at maximum torque setting.
5. Supply voltage.
6. Actuator output shaft speed.
7. Gear ratio.
8. Serial number, wiring diagram
number, model number.
D. No valve or valve actuator shall
be placed into service or tested until authorized by the ENGINEER.
E. Unless otherwise directed by the
ENGINEER, all valves and their actuators shall be installed with the
valve in the closed position. Diverter type valves and their
actuators shall be installed with an initial diverted flow direction
specified by the ENGINEER.
F. The CONTRACTOR shall require the
actuator manufacturer to provide installation advice and assistance
to assure that the actuator is installed, is wired and operates in
accordance with all manufacturers’ instructions and documentation.
3.2 SERVICES OF MANUFACTURERS
REPRESENTATIVE
A. For all pneumatic, hydraulic, or
electric motor actuators, it shall be the responsibility of the
CONTRACTOR to provide a qualified representative of the valve
manufacturer to perform all on-site field setups, mechanical
adjustments and electronic settings for the required functions.
The cost of providing a qualified representative of the actuator
manufacturer for field adjustments (or battery replacements if
applicable) shall be included in the CONTRACTOR's Bid.
B. Performance Testing: The
CONTRACTOR shall demonstrate that each valve actuator installed as a
part of a piping system will operate under field conditions or
actual fluid, flow and pressure as designed and in the manner for
which the actuator was specified in the actuator schedule. All
testing will be witnessed and accepted by the ENGINEER or the OCSD’s
Engineering Representative.
C. Provide individual test data
sheets for each actuator. Record the following parameters as a
minimum:
1. No load current.
2. Current draw at maximum torque
setting.
3. Stall current.
4. Torque at maximum torque
setting.
5. Supply voltage.
6. Actuator output shaft speed.
7. Gear ratio.
8. Serial number, wiring diagram
number, model number.
D. No valve or valve actuator
shall be placed into service or tested until authorized by the
ENGINEER.
E. Unless otherwise directed by
the ENGINEER, all valves and their actuators shall be installed with
the valve in the closed position. Diverter type valves and their
actuators shall be installed with an initial diverted flow direction
specified by the ENGINEER.
F. The CONTRACTOR shall require
the actuator manufacturer to provide installation advice and
assistance to assure that the actuator is installed, is wired and
operates in accordance with all manufacturers’ instructions and
documentation.
G. The CONTRACTOR shall provide O&M
training for valve actuators by a qualified representative of the
actuator manufacturer company. The costs to perform manufacturer’s
recommended training for a minimum of four hours in two separate
sessions shall be included in the bid price
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