Dostek Engineering Sdn. Bhd.
Transcript of Dostek Engineering Sdn. Bhd.
Greatork ®
Dostek Engineering Sdn. Bhd.(662419-H)
Tefulong Group Co., Ltd, CHINA
Established in 1987 lacated in Wenzhou city, one of
biggest and leading Electric valve Actuator manufacturers
in China.The intelligent electric actuator are our key
product and widely applied in oil & gas, petrochem
industry, refinery, power plant, water process, wastewater
treatment, pulp & paper, and other major industries
throughout mainland China.
TFL’s is well-equipped with modern CNC and testing
machines in its 30,000 SQM workshop under ISO
9001:2000 quality control system. Yearly production
capacity is as large as 45,000 units actuator.
Machining Center Workshop
Technique-Center
Testing Workshop
Factory Store
Product Range
1) Multi-turn Actuator
2) Quarter-turn Actuator
3) Linear Actuator
Dostek Engineering Sdn. Bhd.(662419-H)
Multi-turn(AVA Series)
Multi-turn Actuator are required
for the automation of multi-turn
valves, which transmit to the
valve a torque for at least one
full revolution.
Major representatives of this
type is Gate & Sluice Valves
Torque Range: 45Nm-2500Nm
Dostek Engineering Sdn. Bhd.(662419-H)
Quarter-turn(AVAT Series)
Quarter-turn Actuator are
required for the automation of
quarter-turn valves, which
transmit a torque to the valve for
less than one full revolution.
Major representatives of this
type is Butterfly & Ball Valves.
Torque Range:125Nm-2000Nm
Dostek Engineering Sdn. Bhd.(662419-H)
Linear(AVAMD Series)
AVAMD is typical representative
of the valves to be automated is
the control valve, like the plug in
the bathtub is pressed into drain,
the plug is pressed into the plug
seat by a stroke movement.
Torque Range:
7.7kN-60kN
Dostek Engineering Sdn. Bhd.(662419-H)
Torque
Measurement
Motor & Drive
Valve position
Control
Infrared
Setting
Local/ Stop/
Remote
Manual
Operation
Terminal
Compartment
Thrust Base
Design
Dostek Engineering Sdn. Bhd.(662419-H)
Pressure SensorThe precise torque value is
decide by the electronic signal
converted from the reaction
force of the motor shaft’s thrust
transferred by pressure sensor,
thus solves the problem of
calculating the torque
according to the changes of
power frequency, voltage and
temperature, as well as the
problem of torque excursion
because of technical efficiency
changes of gears.
Dostek Engineering Sdn. Bhd.(662419-H)
AVAT Series
AVA Series
Hall effect magnetic
pulse system
accurately measures
and controls the
stroke of the actuator
without using gears
and switches.
Hall Sensor
Main Board
Adopt a high-definition LCD
display window with backlight
enables easy viewing of valve
position, torque and function
status.
System-on-a-chip(SOC)
technology which packages all
the necessary electronic
circuits and parts of electronic
components without complex
electric wiring.
Dostek Engineering Sdn. Bhd.(662419-H)
Motor
The electric motor was
Class F insulated, with a
time rating of at least 15
minutes at 104 F (40 C) or
twice the valve stroking
time, whichever is longer, at
an average load of at least
33% of maximum valve
torque.
Dostek Engineering Sdn. Bhd.(662419-H)
Motor Protection
Protection provided for motor as follows:-
a) The motor de-energised in the event of the event of a
stall when attempting to unseat a jammed valve.
b) Motor temperature is sensed by a thermostat to protect
against overheating.
c) Single phasing protection.
d) Anti-condensation heater energized when the actuators
are not operating.
Dostek Engineering Sdn. Bhd.(662419-H)
Actuator Display
Valve Fully Closed Valve Fully OpenValve Mid Travel
Green indicator
and closed
symbol displayed
Red indicator and
open symbol
displayed
Yellow indicator
and percentage
open value
displayed
Dostek Engineering Sdn. Bhd.(662419-H)
Display-Alarm Indication
Control Alarm
It display when the remote
control system maintains
an active ESD or interlock
signal. Local and Remote
operation will be inhibited
at this time.
Actuator Alarm
The actuator alarm icon is
displayed when the CPU
detects a problem from
inner or outer actuator.
Electrical operation will be
inhibited while it alarms.
Dostek Engineering Sdn. Bhd.(662419-H)
Display-Alarm Indication
Battery Alarm Valve Alarm
The Battery alarm icon is
displayed when CPU
detects its battery as
being low.
When the valve alarm
appears and the
configured torque value
being developed, it will
cause the actuator trip-off.
Dostek Engineering Sdn. Bhd.(662419-H)
Non-intrusive–sealed for life
AVA/AVAT series need not be removed
for site commissioning. All settings and
adjustments are made using the
supplied infra-red Setting Tool. After
assembly in the controlled
environment of our manufacturing
facilities, air exchanges are eliminated-
all internal components are completely
protect for life.
Non-intrusive control selectors mean
there are no moving shafts penetrating
the control enclosure.
IrDA Setting
Tool
Dostek Engineering Sdn. Bhd.(662419-H)
Fieldbus System
Digital 2-wire communication module (slave device),
suitable for Modbus RTU protocol and RS-485 electrical
signal.
Greatork Electric Actuator are fully compatible with
following fieldbus communication systems:
1. Profibus DP
2. Modbus RTU
3. Foundation Fieldbus
This is achieved simply and cost effectively through fitting
an appropriate Greatork manufactured circuit board
module inside the actuator’s electric housing- normally at
the time of production.Dostek Engineering Sdn. Bhd.
(662419-H)
Convention Hard Wired 4 cores power cable
Control SystemFieldbus
Master (PLC)
Actuator 1
Actuator 2
ControlFeedback
Actuator 3
Dostek Engineering Sdn. Bhd.(662419-H)
Bus Control System
Fieldbus
Master (PLC)Control System
Actuator 1
Actuator 2
Actuator 3Actuator 4Actuator 32
Max. up to 32pcs
Dostek Engineering Sdn. Bhd.(662419-H)
Advantage of Fieldbus
Traditional 4 to 20mA field
wiring often result in a rat’s
nest of wires, cable and
terminations.
A fieldbus installation
substantially simplifies
wiring.
1) Reduced wiring saves time during planning and installation.
2) Cable, marshalling rack and dimensions of the control cabinet will be
reduced.
3) More information can be transferred using fewer wires.
4) Self-diagnosis of the devices via fieldbus reduces downtimes and
maintenance times.
Enclosure Protection
Greatork Electric Actuator are assembled into a double-
sealed watertight metallic. Double Seal system ensures
protection of internal components since they are
separated from the cable and terminal compartment by a
watertight terminal block.
Greatork Electric Actuator enclosure protection types are
defined according to the IP codes of EN 60529:2001.
Greatork Electric Actuator manufacturers supply devices
in enclosure protection IP 68 standard which provide
protection against submersion up to a max. head of
water. (15 meter, Duration : 90 hours)
Dostek Engineering Sdn. Bhd.(662419-H)
Explosion Protection
Greatork Electric Actuators designed for these
applications, being explosion-proof (ATEK 94/9/EC)
devices, have to be qualified by a test authority (notified
body). There is no such thing as a worldwide uniform
standard .
The Directive ATEX 94/9/EC is the European Directive for
equipment in potentially explosive atmospheres. It
defines the general protection objections (protection of
persons and property).
Dostek Engineering Sdn. Bhd.(662419-H)
International Certificate
ATEX 94/9/EC
Dostek Engineering Sdn. Bhd.(662419-H)
IP 68 Standard
International Certificate
Dostek Engineering Sdn. Bhd.(662419-H)
International Certificate
Inspection Certificate
Dostek Engineering Sdn. Bhd.(662419-H)
International Certificate
Certificate of Registration
Dostek Engineering Sdn. Bhd.(662419-H)
International Certificate
OHSAS 18001:2001
Dostek Engineering Sdn. Bhd.(662419-H)
International Certificate
ISO 14001
Dostek Engineering Sdn. Bhd.(662419-H)
International Certificate
ISO 9001
Dostek Engineering Sdn. Bhd.(662419-H)
International Certificate
Certificate of Conformity
Dostek Engineering Sdn. Bhd.(662419-H)