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Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Jun 25, 2018

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Page 1: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Pneumatic Actuator

Page 2: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Rack & pinion pneumatic actuator

Page 3: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Double acting pneumatic

actuator

When air pressure comes into port A to the middle chamber,

the piston move aside. The air from the side chambers will comes

out from Port B

When air pressure comes into port B to

the side chambers, the piston move back to

the previous position. The air from the

middle chamber will comes out from Port A

Rack & pinion pneumatic actuator

Page 4: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Single acting pneumatic

actuator

When air pressure comes into port A into the middle chamber,

the piston move aside pushing the springs.

The air from the spring chambers will comes

out to the atmosphere.

When air pressure is released out (exhaust)

from port A , the springs will push the piston back into the previous position.

The air from the side chambers will comes

in from the atmosphere into the

spring chambers.

Rack & pinion pneumatic actuator

Page 5: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Scotch Yoke pneumatic actuator

Page 6: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Scotch Yoke pneumatic actuator

CAM

Side Bar

Page 7: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

BIG Scotch Yoke pneumatic actuator

Page 8: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

BIG Scotch Yoke pneumatic actuator

CAM

Side Bar

Page 9: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

BIG Scotch Yoke pneumatic actuator

Page 10: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Rotary Vane pneumatic actuator

Page 11: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

4-piston rack & pinion pneumatic actuator

Our Habonim 4-piston rack & pinion pneumatic actuator is unique compared with the traditional

2-piston rack & pinion pneumatic actuator

Video

Page 12: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 13: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 14: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 15: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 16: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 17: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 18: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Pneumatic actuator

Double acting close Double acting open

Single acting close Single acting open

Page 19: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Springs

Page 20: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Springs

Page 21: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Limitation of Habonim pneumatic actuator

Habonim pneumatic actuator is limited to be installed up to 8” size of ball valve # 150 only

Page 22: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

ISO-5211 mounting

Pneumatic actuator bottom plane has a standard ISO-5211 mounting dimension to match with the ISO-5211 mounting pad on top of a ball valve construction

ISO mounting pad ISO mounting pad

ISO mounting pad

Page 23: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

ISO-5211 mounting

Page 24: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Mounting bracket-Adapter

• Rigid construction • Dual ISO pattern mounting planes • High visibility of stem packing • Aesthetic looks • Easy of access for assembly tools • Stainless steel CF8 material • Holes for limit switches • Holes for locking pins MK47C-XX-CYY

Page 25: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Valve torque table

For example 2” Habonim ball valve (with TFM seat material) • If the fluid pressure = 10 bar The torque of the ball valve = 29 NM (blue color) With 20 % safety factor The torque of the ball valve = 34.8 bar (green color) • The red color line is 316 SS stem operating torque limit = 48.6 NM • The 17-4 PH stem operating torque limit = 268 NM

Page 26: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Stem operating torque limit (MAST)

• If a ball valve is operated manually the manual turning torque of an operator is limited the operator manual turning torque cannot damage the ball valve’s stem easily !

• But if a ball valve is operated by a pneumatic actuator we cannot control the turning torque of the actuator especially if we over sized the actuator model could be the turning torque is much bigger than the 316SS stem operating torque limit it can damage the stem in this case we have to use a better material for stem 17-4 PH material is harder & tougher than 316 SS material

Valve Stem

Page 27: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Basic actuator definitions

Page 28: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Ball valve torque

BALL VALVE TORQUE: BTO (break torque to open) = 100 %

RTO (run torque to open) = 30 % ETO (end torque to open) = 50 %

BTO (break torque to close) = 55 % RTO (run torque to close) = 30 % ETO (end torque to close) = 50 %

Habonim 2” size torque (after 20 % safety factor) BTO (break torque to open) = 34.8 NM

RTO (run torque to open) = (0.3 x 34.8 NM) ETO (end torque to open) = (0.5 x 34.8 NM)

BTO (break torque to close) = (0.55 x 34.8 NM) RTO (run torque to close) = (0.3 x 34.8 NM) ETO (end torque to close) = (0.5 x 34.8 NM)

Page 29: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Habonim double acting actuator chart

NM

Page 30: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Sizing double acting pneumatic actuator

2” ball valve with TFM seat After 20 % safety factor Torque = 34.8 NM Pneumatic actuator sizing: With 5 bar air pressure Model C-25 pneumatic actuator is choosen Actuator torque @ 5 bar air pressure = 65 NM Check the stem MAST 316 SS material stem MAST = only 48.6 NM < 65 NM actuator torque Have to use 17-4 PH stem material with 268NM of MAST

Page 31: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Habonim single acting actuator chart for normally closed ball valve

NM

Page 32: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Sizing single acting pneumatic actuator (normally closed)

2” ball valve with TFM seat After 20 % safety factor Torque = 34.8 NM Pneumatic actuator sizing: With 5 bar air pressure Model C30-2B is choosen Spring end torque = 36 NM > 34.8 NM Actuator air start torque = 70 NM Check the stem MAST 316 SS material stem MAST = only 48.6 NM < 70 NM actuator torque Have to use 17-4 PH stem material with 268 NM of MAST

Page 33: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Habonim single acting actuator chart

NM

Page 34: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Sizing single acting pneumatic actuator (normally open)

2” ball valve with TFM seat After 20 % safety factor Torque = 34.8 NM Pneumatic actuator sizing: With 5 bar air pressure Model C25-2B is choosen first Spring start torque = 36 NM > 34.8 NM But actuator air end torque = only 27 NM CANNOT BE USED ! Model C30-2B is choosen next Spring start torque = 62 NM > 34.8 NM Actuator air end torque = 43 NM CAN BE USED ! Check the stem MAST 316 SS material stem MAST = only 48.6 NM > 43 NM actuator torque No need to change the stem material !

Page 35: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Combination Habonim ball valve + Actuator

Page 36: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Impact torque booster

Page 37: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Impact torque booster

Page 38: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Impact torque booster

Page 39: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Impact torque booster

Page 40: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Impact torque booster

Page 41: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Impact torque booster

Page 42: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Sizing Impact torque booster

Page 43: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Sizing Impact torque booster

Page 44: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Type of Automatic valves

Page 45: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Automatic On-Off valve Automatic On-Off valve

Piston actuator

Angle seat piston valve

Page 46: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 47: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 48: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

How angle seat piston valve works

When the 3-way solenoid valve is not yet working No air pressure is coming into the piston actuator of the angle seat piston valve

valve closes

When the 3-way solenoid valve is energized Air pressure is coming into the piston actuator of the angle seat piston valve

valve open

Exhaust Air Supply Air Supply

Page 49: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Automatic On-Off valve

Page 50: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 51: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 52: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Solenoid valve for hazardous area

Oil & Gas area does not allow Namur solenoid valve installed in a pneumatic actuator !

Solenoid valve must be connected with instrument tubing & fitting !

Page 53: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Principle of flow switch Principle of level switch

Principle of pressure switch Principle of temperature switch

Principle of On-Off control

Page 54: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Principle of On-Off control

Pressure Switch

Temperature Switch

Level Switch

Flow Switch

Page 55: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 56: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 57: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 58: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 59: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 60: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 61: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 62: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 63: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 64: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 65: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 66: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 67: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 68: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 69: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 70: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion
Page 71: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

• Wiring is also shorter

Page 72: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Silencer

Silencer is used to absorb the pneumatic/air noise at the exhaust port

of a solenoid valve

Page 73: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Silencer + Speed Controller

Combination silencer w/ speed controller is used to absorb the pneumatic/air noise at the exhaust port of a solenoid valve.

The speed controller can be used to slow down the speed of the pneumatic actuator’s opening or closing

Page 74: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Quick exhaust valve

Page 75: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Air filter Regulator + gauge

Air filter regulator + gauge is used to reduce the air pressure coming to the

pneumatic actuator

Page 76: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Automatic modulating valve

Pneumatic Actuator

Positioner

Positioner

BALL VALVE

Page 77: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Principle of modulating control

Pressure application Temperature application

Level application Flow application

Page 78: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Principle of modulating control

Pressure transmitter Temperature transmitter Level transmitter Flow transmitter

Modulating controller PLC Programmable Logic Controller

DCS Distributed Control System

Page 79: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Principle of modulating control

Pressure application Temperature application

Level application Flow application

Page 80: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Why do we need positioner ?

At factory, the control ball valve is set without any fluid flowing through the control valve, we call this bench setting. The co-relationship between air supply pressure & the % of ball valve opening is represented with the “BLUE” line in the above chart When the fluid is introduced into the control ball valve a normally closed control ball valve’s co-relationship between air supply pressure & the % of valve opening will be shifted as shown in the above chart with “RED” line (the ball control valve will receive additional force to open the ball valve from the fluid flow pressure)

Page 81: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Why do we need positioner ?

At factory, the control ball valve is set without any flow through the control ball valve, we call this bench setting. The co-relationship between air supply pressure & the % of valve opening is represented with the “BLUE” line in the above chart When the liquid is introduced into the control ball valve a normally open control ball valve’s co-relationship between air supply pressure & the % of ball valve opening will be shifted as shown in the above chart with “RED” line (the ball control valve will receive additional force to close the ball valve from the fluid flow pressure)

Page 82: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion

Why do we need positioner ? For many applications, the air pressure coming into the

pneumatic actuator may not be enough to cope with friction and high differential pressures. A higher control pressure and stronger springs could be used, but the practical solution is to use a Positioner.

Positioner is an additional item which is usually fitted to the stem/shaft of the pneumatic actuator in order to monitor the valve position. It requires its own higher-pressure air supply, which it uses to position the valve. A valve positioner relates the input signal and the valve

position, and will provide any output pressure to the actuator to satisfy this relationship, according to the requirements of the valve, and within the limitations of the maximum supply pressure.

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A positioner translates the input signal received from a controller to a required valve’s position & supplies the valve’s actuator with the required air pressure to move the valve into the correct position

A positioner ensures that there is a linear relationship between the signal input pressure from the control system and the position of the control valve. This means, that for a given input signal, the valve will always attempt to maintain the same position regardless of changes in valve differential pressure, stem friction, diaphragm hysteresis and so on.

A valve positioner relates the input signal and the valve position, and will provide any output pressure to the actuator to satisfy this relationship, according to the requirements of the valve, and within the limitations of the maximum supply pressure

Why do we need positioner ?

Page 84: Pneumatic Actuator - inko.com.sginko.com.sg/image/data/CATALOG/Valve/Automation-4.pdf · BIG Scotch Yoke pneumatic actuator. Rotary Vane pneumatic actuator. 4-piston rack & pinion