Quarter turn Electric actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Electric...
Transcript of Quarter turn Electric actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Electric...
Quarter turn
Electric actuator
Quarter turn electric actuator
Modulating Quarter turn electric actuator
Quarter turn
Electric actuator
Quarter turn motorized actuator
Quarter turn motorized actuator
Quarter turn motorized actuator
Local control
station
Mechanical stopper
(travel limit)
Quarter turn motorized actuator
Quarter turn motorized actuator
Quarter turn motorized actuator
Quarter turn motorized actuator
Quarter turn motorized actuator
Quarter turn motorized actuator
Quarter turn motorized actuator
Quarter turn motorized actuator
Quarter turn motorized actuator
Quarter turn motorized actuator
Linear (multi-turn)
Electric actuator
GATE VALVE BALL VALVE
MULTI TURN ELECTRIC ACTUATOR
(also can be used for big sizes of ball, butterfly & plug valve)
MULTI TURN ELECTRIC ACTUATOR
MULTI TURN ELECTRIC ACTUATOR ON-OFF duty
MULTI TURN ELECTRIC ACTUATOR
MULTI TURN ELECTRIC ACTUATOR
MULTI TURN ELECTRIC ACTUATOR
MULTI TURN ELECTRIC ACTUATOR
MULTI TURN ELECTRIC ACTUATOR
Mounting linear motorized actuator
Mounting linear motorized actuator
Gate valve data
Gate valve data
Gate valve stem data The Acme thread was developed sometime in the second half of the nineteenth century as a profile
well suited to power screws that has various advantages over the square thread, which had been
the form of choice until then. It is easier to cut via either single-point threading or die than the
square thread is (because the latter's shape requires tool bit or die tooth geometry that is poorly
suited to cutting); it wears better than square (because the wear can be compensated for); it is
stronger than a comparably sized square thread; and it makes for smoother engagement of the half
nuts on a lathe leads crew than square does. The Acme thread form name appears as early as
1895.
Acme screw threads are now extensively used for a variety of purposes. Long-length Acme threads
are used for controlled movements on machine tools, testing machines, jacks, aircraft flaps, and
conveyors.
Short-length threads are used on valve stems, hose connectors, bonnets on pressure cylinders,
steering mechanisms, and camera lens movement
Sizing linear motorized actuator to gate valve
For example:
8” gate valve class 150
Valve’s stem diameter = 32 mm
Number of turns = 43 turns
Thrust = 28.8 KN
Torque = 85.5 NM
Sizing linear motorized actuator to gate valve
We choose Rotork linear electric actuator
model IQ-20
With 36 RPM actuator speed, the actuator
torque = 203 NM >>> more than 85.5 NM
So the actuator timing to open/close = 43
turns x 60/36 = 71.7 seconds
Sizing linear motorized actuator to gate valve
Sizing linear motorized actuator to gate valve
The Rotork actuator model IQ-20 has
mounting dimension of F14
We use the group “A” coupling (for rising
stem), the coupling diameter = 38 mm
>>> more than 32 mm of the gate valve’s
stem diameter
The thrust rating of model IQ-20 = 100 KN
>>> more than 28.8 KN of the gate valve
thrust
So the complete model of Rotork linear
electric actuator is IQ20-F14-A
Sizing linear motorized actuator to gate valve
Drive coupling
SIZING
ROTORK IQ SERIES
MULTI TURN
ELECTRIC ACTUATOR
INTO A
BIG GATE VALVE
Sizing linear motorized actuator to big gate valve
For example: 24” gate valve class 300 Torque = 2,451 NM, with 30 % safety factor torque = 1,3 x 2,451 = 3,186 NM Thrust = 408 KN Stem diameter = 2-1/2 mm Number of turns = 64 turns
The model IQ-95 can
stand 3,000 NM only !!!!!
So we have to use IQ
multiturn electric
actuator with:
ADDITIONAL bevel gear
model IB.
Sizing linear motorized actuator to big gate valve
For example:
We choose model IQ-70, at 48 RPM, the torque = 1,020 NM
Sizing linear motorized actuator to big gate valve
Sizing linear motorized actuator to big gate valve
With coupling A, thrust of
actuator model IQ-70 = 220 KN
Sizing linear motorized actuator to big gate valve
The model IQ-70 electric actuator has an ISO-5210
dimension of F25
Multi-Turn gearbox
MULTI TURN ELECTRIC ACTUATOR
Multi-Turn gearbox
Sizing linear motorized actuator to big gate valve
ACME thread
of valve stem
(output)
ISO-5210
Flange
To actuator
(input)
Sizing linear motorized actuator to big gate valve
For example:
We choose the IB-10 gear box
Input ISO-5210 flange from actuator = F25
Output flange to valve = F25
Sizing linear motorized actuator to big gate valve
The IB-10 gear box:
Max ACME thread = 3-3/8” >>> more than 2-1/2” ACME thread of the gate valve
Sizing linear motorized actuator to big gate valve
Sizing linear motorized actuator to big gate valve
24” gate valve class 300
Torque = 2,451 NM with 30 % safety factor torque = 1,3 x 2,451
= 3,186 NM
Thrust = 408 KN
We choose motorized actuator model IQ-70 at 48 RPM, the
torque = 1,020 NM
We choose IB-11 gear model
Nominal ratio = 4
Motorized output torque = 4,067 Nm > 1,020 NM
Valve’s thrust maximum = 500 KN > 408 KN
Nominal advantage = 3.85
Motorized actuator torque + IB-20 gear becomes:
(3.85 x 1,020 NM) = 3,927 NM > gate valve’s torque 3,186 NM