Showing posts with label Vane Actuator. Show all posts
Showing posts with label Vane Actuator. Show all posts

Monday, January 21, 2019

Demonstration of NAMUR Mount Solenoid Valve with Manual Bypass Option on Kinetrol Actuator

This video demonstrates a very helpful solenoid valve option, the manual bypass feature. The technician uses a NAMUR mounted solenoid valve with built-in bypass on a Kinetrol vane actuator to show you exactly how the option works.

Tuesday, November 27, 2018

Kinetrol Actuators Protect People and Property with Reliable Performance in Chemical Plant Fire

Kinetrol actuator in safety application
The Kinetrol actuator is completely
unrecognizable,  having been melted in a fire.
A chemical plant in the Southeast USA that manufactures PTA (purified terephthalic acid) experienced a compressor house fire, causing extensive equipment damage and shutting down production for months.

The building houses a $30 million dollar compressor that supplies process air to reactors to begin the PTA manufacturing process.

As part of the safety system, (2) two 6" class 150 high performance butterfly valves with Kinetrol 097-120 and open/closed limit switches were installed on process air lines of one production unit.

During the fire, the two Kinetrol actuated valve assemblies performed exactly as required, shutting the valves tightly and keeping them shut even after the heat of the fire completely melted the actuator housings.

Kinetrol actuator
Closer view.
The actuators had been in service one year at the time of the fire.  Unlike many other Kinetrol actuator applications, these were not chosen for their high cycle capability,  nor for their long service life. In this application Kinetrol was chosen for their absolute reliability in critical situations.

For more information, contact Kinetrol USA by calling 972-447-9443 or by visiting https://kinetrolusa.com.

Friday, August 10, 2018

A Review: Why Kinetrol Actuators Are the Most Reliable 1/4 Turn Pneumatic Actuator on the Market Today

With millions of actuators performing reliably around the world, the Kinetrol vane actuator's are the best choice for valve and damper actuation applications that require long life and ultra-dependable performance. Here's a review as to why:

Kinetrol Actuators
Click on image for larger view.
  • Durable epoxy stove enamel exterior finish.
  • Long life epoxy or PTFE internal finish.
  • Integral vane/shaft casting - only one moving part: Simplest and most reliable mechanism for quarter-turn rotary actuation.
  • Manual override square and position indicator.
  • Stainless steel expanders ensure long term lipseal / case contact.
  • Double opposed, Polyurethane, lip seals for effective sealing and long maintenance free life.
  • Space filling/energy absorbent sideplates (polymer or metal).
  • Corrosion resistant zinc (non-incendive) or aluminum alloy case.
  • Easy stop adjustment at each end of stroke for accurate seating.
  • Close couple control modules. Fail-safe spring returns, limit switches, positioners and solenoid valves all close couple to the actuators.
  • No cranks or gearing. No power loss or backlash - allows accurate positioning.
  • Long maintenance-free life. Up to 4 million operations guaranteed.
  • Compact - space saving - efficient. Best torque/size package available, fast operating speeds, best air consumption, proven design.
  • Unique serial number for identification and traceability.
For more information, visit https://kinetrolusa.com of call 972-447-9443.

Wednesday, July 11, 2018

Kinetrol Vane Actuators: Performance Under Pressure

Here is a short video of Kinetrol valve actuators installed in power plant, chemical plant, cement plant, water treatment, and primary metal plant applications.

972-447-9443

Friday, March 30, 2018

Words Used to Describe Kinetrol Actuators

The Most Reliable 1/4 Turn Pneumatic Actuator on the Market Today. Period.

For over 50 years Kinetrol has been providing trouble-free valve and damper actuators to the chemical, biofuel, food & beverage, metal, mineral, oil, gas, pharmaceutical, power generation, paper, textile, water, wastewater, and transportation industries.

https://kinetrolusa.com
972-447-9443

Sunday, January 21, 2018

Pneumatic Valve Actuator Assembly Designed to Prevent Water Hammer

Vane actuator and dashpot assembly
Kinetrol vane actuator and
dashpot assembly
Water hammer occurs when the flow of fluid in a pipe rapidly changes. The result can be very high pipe pressures, mechanical stress on pipe supports, and possible reversal of flow. If not controlled it can cause pipe bursting, broken pipe supports and joint leakage.

The "hammering" is due to a pressure wave created by the instantaneous change in fluid velocity when a valve is suddenly closed or opened. Controlling valve closure time is one of the most economical ways to minimize water hammer. To do this efficiently, while still meeting the process requirements, the use of a variable speed mechanism to control valve stroke is used. One unique, economical and space savings approach is to use a pneumatic vane actuator coupled with a rotary damper (or dashpot).

Rotary dashpots are precision fluid damping devices which give a smooth resistance to shaft rotation which increases with angular velocity.

In this case, a pump station in the USA was having repeated problems with a large, open reservoir hydraulic actuator used to dampen valve opening and closing.  It was overly cumbersome and costly to maintain.

In its place, the pumping station installed Kinetrol Size 14 double acting actuators with digital speed controllers and Kinetrol LJ rotary dampers (with through-shafts to facilitate position feedback) installed on 12” Pratt butterfly valves.

The addition of the bi-directional, sealed dashpots smooth the normal travel, damp any valve flow induced disc oscillations, and provide at least 40 seconds travel time on air and/or electrical power failure.

Using pulsed outputs with programmable delay between steps, the actuators provide a 10 minute opening & closing time for the full 90 degree travel. The system is adjustable between 3-15 minutes with less than one degree increments., and other opening and closing ranges are available.  The actuators use fail-free logic, but fail-hold & fail-safe are available.

These assemblies were commissioned in early Fall of 2017 and are working very well. Their use will be replicated at other pump stations operated by the same customer.

open reservoir hydraulic actuator
This open reservoir hydraulic actuator was huge and a maintenance headache. 


Monday, July 31, 2017

Integral Vane-Shaft Actuators Best for High Cycle Rate and Modulating Applications

Internal view of vane actuator
Internal view of vane actuator. Note the
single piece vane/shaft design.
Rack and pinion and scotch yoke type pneumatic actuators depend on gears to transfer torque and movement, while integral vane-shaft actuators have no gears (or linkages). As a result,  integral vane-shaft actuators are the hands-down choice for high cycle rate and modulating valve/damper actuation.

Why? Because of the mechanical problems inherent to the use of gears.

According to Wikipedia, "A gear or cogwheel is a rotating machine part having cut teeth, or cogs, which mesh with another toothed part to transmit torque."

The primary disadvantages to gears are:
  • Friction
  • Fretting Wear
  • Backlash
When gears mesh, there is friction. Friction causes heat and wear, which effects the mechanical life of the actuator. Friction converts kinetic energy into thermal energy and can have dramatic consequences if left unchecked. Another important consequence of friction is wear, which may lead to performance degradation and/or damage to the internal components of a rack and pinion or scotch yoke actuator.

"Fretting wear" is caused by the repeated cyclical rubbing between two surfaces (gears in the case of scotch yoke or rack and pinion actuators) and over a period of time, will remove material from one or both surfaces.

Backlash happens when gears change direction. It is caused by the gap between the trailing face of the driving tooth and the leading face of the tooth behind it. The gap must be closed before force can be transferred in the new direction, hence the phenomena of backlash. This is also sometimes referred to as "slop".

For pneumatic actuators with very low cycle rates, or ones that are not used for modulating service, internal gears may be acceptable. However, for applications where there are high cycle rates, or require accurate modulation, the use of a single machined vane actuator with integral shaft is preferred. The reason? No friction, wear, or backlash. 100 percent of the movement of the vane is transferred to the shaft without loss or hysteresis.

For any questions about applying the most appropriate type of actuator for any valve or damper application, call Kinetrol at 972-447-9443 or visit http://www.kinetrolusa.com.

Sunday, May 7, 2017

Kinetrol Product Line Video

A short overview of the Kinetrol product line.

For over 50 years Kinetrol has been providing trouble-free valve and damper actuators to the chemical, biofuel, food & beverage, metal, mineral, oil, gas, pharmaceutical, power generation, paper, textile, water, wastewater, and transportation industries.

Wednesday, December 14, 2016

The Toughest Pneumatic Actuators on Earth

Kinetrol's reputation for performing flawlessly in the harshest conditions is known around the world.

The Kinetrol vane actuators' outstanding cycle life, smooth and precise movement, and environmentally rugged design makes it the best choice for all of your valve actuation and damper drive requirements.

For more information visit http://www.kinetrolusa.com or call 972-447-9443.

Tuesday, November 22, 2016

Review: Vane Actuators

vane actuator
An internal view of a vane actuator allowing you
to see the one piece vane and shaft, lip seals,
travel stops, and the clam shell  design.
The vane actuator is a simple and elegant mechanism for quarter-turn valves, dampers, and other rotary motion applications. The vane actuator produces rotary motion through the application of air pressure to a "vane' attached directly to an output shaft. In higher quality vane actuators, the vane and shaft are machined from a single piece of steel. Because of this, any motion from the vane is transferred directly to the shaft, without backlash or lost motion.

The vane includes “lip seals” that isolate the vane and shaft from the air supply. The lip seal design provides several advantages, namely eliminating the need for shaft seals and an inherent cleaning action internally. A split, or “clam-shell” housing is assembled around the vane, totally enclosing it. When supply air is applied to one side of the vane, torque is produced moving the vane in one direction. Accordingly, there is direct rotary motion transfer to the shaft, with 100% efficiency. Torque is controlled by surface area of the vane and the differential pressure on either side of the vane. Bi-directional over-travel is limited by the use of travel stops mounted in both sides of the housing.

The Kinetrol Vane Actuator
The Kinetrol Vane Actuator
Single acting vane actuators use a spring to return the actuator to its resting position. By adding a spring, vane actuators can fail-open or fail-closed in the event of power failure. Double acting actuators use supply air on either side of the actuator to dictate clockwise or counter-clockwise movement. Other types of pneumatic actuators generally require high quality air as their power source, but vane actuators can accept poorer quality supply air, as the vane design uses the vane’s “wiping action” to push dirt and grime out of the way. Vane actuators are generally more compact that other types of actuators and come in many sizes, producing a wide range of torques.

For more information about vane actuators visit http://www.kinetrolusa.com or call 972-447-9443.

Monday, October 31, 2016

Why Vane Actuators Outlast and Outperform Rack & Pinion and Scotch Yoke Designs

Kinetrol vane actuators perform
Kinetrol vane actuators perform
in the toughest applications.
Due to the use of gears, slides, pins, and yokes, rack & pinion and scotch-yoke design actuators are less reliable than Kinetrol vane actuators.

Kinetrol's design is based upon a single moving part, which eliminates additional parts required to convert linear motion to rotary motion. This simple and innovative design provides a highly accurate and extremely reliable actuator for operating valves, drives and dampers, and is perfectly suited for the most demanding process control control applications.


For more information, visit http://www.kinetrolusa.com

Monday, September 26, 2016

Valve Actuators for Bottom Ash High Pressure Spray Removal

coal burning power plant
Coal burning power plant
The pulverized coal boiler is the most common type of coal-burning furnace in the electric utility industry. After the pulverized coal is burned in a dry, bottom boiler, approximately 80 % of the unburned material or ash gets captured and recovered as fly ash. The remaining 20% of ash is categorized as bottom ash, a dark gray, granular, porous ash that is collected in a water-filled hopper at the bottom of the furnace. When a sufficient amount of bottom ash is collected in the hopper, it is purged by high pressure water jets into sluiceways or other conveyances for further processing.

Kinetrol Actuator
Kinetrol Rotary Vane Actuator
The high pressure water (approx. 400 PSI) is actually recycled ash water and is very abrasive. The valves and control systems used to move the bottom ash slurry are typically 3” to 12” double offset, high-performance butterfly valves. Double acting pneumatic actuators are most common for opening and closing. Cycle frequency varies, but most typically are between 3 to 12 times per day.

Its crucial that the double offset valves seat completely and are truly “zero-leakage”. In this high pressure and high abrasion scenario, even the slightest leak will cause a rapid failure of the valve seat.

Rack and pinion, scotch yoke, and electric actuators are problematic because of the inherent hysteresis in their gearing. This hysteresis compounds over time adding to the amount of error introduced and increasing the likelihood of a poorly closed valve.

Rotary vane actuators, on the other hand, provide “hysteresis-free” seating due to their single moving part and one piece vane and shaft design. When mounted to the butterfly valves with a no-play coupler, the valve disc is guaranteed to close tightly, without degradation over time.

Additional benefits of using the vane actuator is smooth, controlled closing to reduce the possibility of water hammer and the greater ability work in poor quality atmospheres, both of which are considerations for this application.

Tuesday, July 26, 2016

What Is a Vane Actuator?

Vane Actuator
Inside view of a vane actuator showing the clam-shell
design, internal chamber layout, and double-sided vane.
Vane actuators use pneumatic or hydraulic power to open, close, or modulate quarter-turn valves, dampers, louvers, as well as for precise movement of ergonomic lifting equipment.

Linear motion gas/hydraulic cylinder or piston actuators use gears to convert linear to rotary motion. Vane actuators employ a rigid vane inside a sealed chamber that is connected directly to the drive shaft at one end with no gears. The result is much smoother rotary movement and greater cycle life.

Vane actuators operate by introducing a fluid or gas to either side of it's enclosure through inlet/outlet ports, creating the force required for movement. Advanced vane actuators utilize double sided vanes that allow for pressurization of both sides, allowing for bi-directional movement. The vane itself provides an arc movement in the far side (opposite the shaft) of the actuator, translating rotary movement back to its integrated shaft.

The vane actuator shaft is designed to connect directly to a device (valve, damper, ergo mechanism) for the transfer of movement. In advanced design vane actuators, the shaft is completely sealed from the pressurized side of the vane via “lip seals” which act to prevent the loss of air/gas/oil through shaft seals or bearings. With the help of spring steel supports, the lip seals are kept in constant contact with the inner surface of the chamber wall at all times during rotation. A side benefit of lip seals are the self-cleaning or sweeping action they provide to the inside chamber surfaces.

Since the double-sealed vane separates the vane actuator chamber in two sides, movement in either direction can be changed merely by creating a pressure differential on either side of the vane. Inlet/outlet ports allow for the pressurization and de-pressurization for either side. As gas or fluid is introduced to one side, the vane is forced away, toward the opposite side. By reversing the pressure and vent ports, and pressurizing the opposite chamber, the actuator moves in the opposite direction.

When vane actuators use only gas or fluid as their source for movement in both directions, they are referred to as “double acting”. When an optional spring is used to provide the power in one direction (open or close) they are referred to as “spring return”.

For more information on vane actuators, visit http://www.kinetrolusa.com

Friday, June 24, 2016

Hear Kinetrol USA's Neil Meredith Interviewed at WEFTEC 2016

Neil Meredith
Neil Meredith
Kinetrol USA's Mid-West Regional Sales Manager Neil Meredith was interviewed at WEFTEC 2016 about Kinetrol products, markets, and opportunities. Take a minute to hear what he says!

WEFTEC®, the Water Environment Federation’s Annual Technical Exhibition and Conference, is the biggest meeting of its kind in North America and offers thousands of water quality professionals from around the world the best water quality education and training available today. Also recognized as the world’s largest annual water quality exhibition, WEFTEC’s massive show floor provides unparalleled access to the field’s most cutting-edge technologies and services.

Kinetrol actuators are widely used in municipal water systems across the United States and are known for their outstanding performance, durability, and extreme high cycle life.


Monday, May 16, 2016

Tighter Boiler Emissions Control with Pneumatic Vane Actuator Damper Drives

pneumatic damper drive
Pneumatic rotary vane damper drive.
In order to ensure efficient, reliable, and safe boiler operation, it is critical to accurately control the flow of the boiler's combustion air and flue gas. Poor control of airflow results in inefficient burning (wasting money), erratic cycling, flame-outs and even the possibility of toxic and hazardous emissions. In order to reduce the likelihood  of these situations, accurate airflow control is critical.

In the United States, the Environmental Protection Agency's introduction of the MACT (Boiler Maximum Achievable Control Technology) Rule requires operators to institute maintenance procedures annually or bi-annually in an effort to force plant operators toward compliance. This strict new legislation has a large impact on how companies' control their emissions from industrial boilers, process heating systems and furnaces. 

pneumatic damper drive uses in plants
Typical drive applications and designs
(click for larger picture).
Industrial boilers use dampers and louvers to control the quantity of air admitted to the furnace. Tighter boiler draft control significantly improves combustion. Any improvement in controlling the position of the dampers and increasing the positioning speed improves boiler efficiency. Damper operation needs to be precise and fast for the accurate control. 

There are an estimated 15,000 boilers, furnaces, and process heaters running in the USA, and many are using an outdated primary component to control their lovers and dampers - the electric damper drive. Electric damper drives utilize motors and gear-boxes to move and position flue gas and combustion gas dampers. However, because of the inherent movement (sometimes referred to as hysteresis) between gears, linkages and other assorted mechanisms, these drives may not provide the accuracy, power, or signal response time required for optimum control.

Enter the pneumatic vane actuator damper drive. Pneumatic vane actuator drives are a newer, but still proven, method to provide high speed, accurate, and continuous modulation of air dampers for precise control. Replacing outdated electric damper drives with fast acting, pneumatic rotary vane damper drives offers measurable improvement to burner efficiency and cleaner emissions.

Switching out electric drives with their better performing pneumatic cousins is fairly simple. Downtime is not an issue.  The old drive footprint, lever positions, connecting rods, and operational envelop are considered with every design. Any existing mechanical or electrical connection placements are matched. Since the new drive mates to all existing mounting and connections, and the envelope size is typically smaller, installing the pneumatic drive is usually a matter of pulling the old one out, and dropping the new one in.

At the heart of the pneumatic damper drive is the stalwart pneumatic rotary vane actuator. With hundreds of thousands of these devices operating in the toughest process applications around the world, their reputation is well earned. These actuators are known for their incredibly long life, ability to withstand very high cycle rates, and smooth “bump-less” control. They are also designed to handle high ambient temperatures, high vibration, and very dusty environments, typical of where boiler dampers are located. Additionally, rotary vane actuators are available with direct mount pneumatic and electro-pneumatic positioners, manual overrides, network communication modules, limit switches, and spring modules. The direct mount design eliminates external brackets and coupling, and keeps the overall package size small.

Pneumatic vane actuator damper drives are a significant improvement over traditional electric damper drives. They provide fast response to input signal changes, very accurate positioning, a reduction in plant air consumption, and they lower fuel consumption. Engineers tasked with increasingly rigorous boiler emissions requirements must consider pneumatic vane style drives as a compelling alternative to the electric drive. They truly are an example of better form, fit, and function.

Tuesday, April 26, 2016

Troubleshooting & Set Up Guide for Kinetrol EL Positioners

Kinetrol EL Positioner
Kinetrol EL Positioner
The Kinetrol EL Positioner operates by modulating the percent opening / closing of a valve or damper by converting an electrical signal to a pneumatic output, which in turn, regulates the position of a pneumatic actuator.

In terms of response and accuracy, the EL Positioner is arguably one of the best electro-pneumatic positioners in the world,  particularly when used in tandem with a Kinetrol vane actuator.

The document below provides an illustrated troubleshooting and set-up guide for the EL electro-pneumatic positioner and is available to support the all the units installed in chemical, petro-chemical, water treatment, power generation and other applications across the world.

Thursday, April 7, 2016

Vane Actuator Compact Size, Power, and Smooth Control Perfect for Ergo Arms

An industrial ergonomic manipulator (also know as ergo arms, articulating arms, articulating jib arms, and lift assist devices) are lifting assistance devices used to help workers lift, maneuver, and place items that are impossible to safely lift themselves. Factors that usually determine the need for an “ergo arm” are item size, weight, or temperature. Different from vertical lifting equipment such as cranes and hoists, ergonomic manipulators can control the pitch, roll or spin of an items for proper placement.

The Kinetrol vane actuator is an ideal pneumatic drive for industrial ergonomic manipulators because of their compact size, powerful torque output, and exceptionally smooth control.



For more information contact Kinetrol USA
1085 Ohio Drive
Plano, Texas 75093

(972) 447-9443 phone
(972) 447-9720 fax
sales@kinetrolusa.com