Showing posts with label valve automation. Show all posts
Showing posts with label valve automation. Show all posts

Monday, October 15, 2018

The Kinetrol Actuator Vane Assembly Design

The Kinetrol rotary vane actuator utilizes an advanced design vane assembly that is engineered to provide millions of trouble-free cycles. This video highlights the advanced features that make it the most reliable 1/4 turn pneumatic actuator on the market today.


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.

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, April 9, 2017

Rugged Design Makes This Vane Actuator the Best Choice for Any Valve or Damper Automation Job

Watch the video below for a quick understanding of why Kinetrol Vane Actuators provide the longest service life in the toughest valve and damper applications.


Wednesday, March 15, 2017

Accuracy, Smooth Operation, and Efficiency Key to Industrial Valve Postioner

EL electro-pneumatic positioner
EL electro-pneumatic positioner
The EL electro-pneumatic positioner combines the precision and adaptability of a digital electronic control circuit with the smoothness and efficiency of Kinetrol's proven proportional servo valve, to give the best available 4-20mA positioning performance from rotary pneumatic actuators. This unbeatable performance is combined with the easiest available setup procedure, easiest access to all functions and options, easy connectibility, and a truly compact all-metal enclosure, plus unique easy-set isolated angle retransmit and limit switch options inside the same enclosure.

The EL positioner is designed to drive a rotary or linear actuator to a position set by the 4-20 mA input signal, and then hold it there until the signal changes.

The microprocessor in the loop powered 4-20 mA positioner circuit reads signal via one channel of a 12-bit A-D convertor, reads the position voltage from tie pot via the second channel of the A-D convertor, and compares the two. If it detects a position different from that required by the signal, it changes its output to the servo valve in order to drive the actuator in the direction required to reach the correct position. As the actuator moves, the feedback pot voltage changes, and the microprocessor continually calculates how to adjust the servo valve in order to guide the actuator accurately into position. Because the servo valve is a fully proportional device, it can be adjusted precisely and smoothly to slow the actuator to a stop exactly where it should be.  The microprocessor is programmed with a sophisticated but compact algorithm which allows this critical dynamic valve adjustment to be made correctly to give optimal results with any actuator/load combination - slow or fast, low friction or high friction, low inertia or high inertia, all can be optimized by PGAIN and DAMP parameters via the positioner circuit pushbuttons. The 12-bit A-D conversion gives resolution of about 1/40 degree.

EL positioner curve
EL positioner curve
The relationship between the input signal and desired position (the "characteristic") is stored in the microprocessor's memory. It can be set to follow any one of eleven pre-programmed curves between its two endpoints. The endpoints (each a combination of a signal value and a position) are set by the user via the pushbuttons. One of the eleven curves is a linearly proportional characteristic - this characteristic only can be selected to give movement of the actuator for signals extrapolated below the low endpoint and above the high endpoint, or to stop dead on signals below the low and above tie high endpoint. The "stop dead" behavior is the only option for the other ten non-linear curves.

The settings entered by the user are stored in non - volatile memory, and are retained even if power (i.e. signal) is lost.

Monday, January 30, 2017

Rotary Vane Valve Actuators

Rotary vane actuator
Rotary vane actuator
A rotary vane actuator is simply a part of an automated valve assembly: its role is to change the position of the valve, converting the motive force of fluid pressure into torque and applying it to a valve stem.

Quarter turn valves are widely used in industrial process automation. Their application is primarily for operations requiring fully open or fully closed valve trim positions, although some do provide modulating service. A rotation of the valve stem through a 90 degree arc will reposition quarter turn valve trim between open and closed positions. A rotary vane actuator is well suited for driving this type of valve, with its own 90 degree arc of movement.

A rotary vane actuator operates quarter turn valves, dampers and louvers. A pressure tight housing contains a movable vane which is sealed to the sides of the pressure chamber by means of a low friction gasket. Inlets into the chamber on opposing sides of the vane allow a controller to produce a pressure differential across the vane. The vane will move, in response to the pressure differential, in either direction. A shaft is connected to the vane and the vane acts like a lever to rotate the shaft as the vane is moved by fluid pressure. The torque produced by the actuator assembly is primarily dependent upon the applied fluid pressure.

Hydraulic rotary vane actuators have the ability to handle large amounts of fluid and dynamic motions, exhibiting also qualities of durability and compactness. Pneumatic vane actuators use plant air pressure as the motive force. Both types generally have few moving parts and require little regular maintenance. A variety of typical automation accessories and options are available to customize a unit for a particular application.

Sunday, November 27, 2016

Kinetrol Spring Return Units: Spiral Torsion Springs Are Key

Spiral torsion spring
Simple view of spiral
torsion spring (protruding
tab and hex center
are loading points.)
Spiral torsion springs are found in many places - clocks, watches, timers ... and Kinetrol spring return units!

Capable of storing much more energy than a typical compression spring, and working in smaller, more compact packages, spiral torsion springs for valve and damper actuation are a proven step-up over helical compression springs.

When a torque is applied to a spiral torsion spring, an angular displacement is created between the first and second loading points, the coil deflects (tightens), and the spring material is placed under stress, exerting a linear (to the degree of rotation) rotational "output" torque,  which drives the spring's rotation. Practically speaking, spiral torsion springs allow for lower torque loss, lower torque stress, and much greater reliability for use in valve and damper actuation.

Kinetrol Spring Return
Kinetrol Spring Return Unit
(note cutaway revealing
spiral torsion spring.)
Along with the inherent advantages of spiral torsion springs, additional benefits of the Kinetrol spring return unit are:

  • Separate housing for modular assembly, easily retrofitted
  • Sealed, non-breathing housing: Protects spring in corrosive environments
  • Adjustable pretension for 'balanced' air and spring stroke torques: Various combinations available for balanced / optimized torques at various air pressures
  • Keeper plates available to ensure safe handling of pretensioned springs
  • Available with ISO/DIN female drive and mounting
The combination of the spiral torsion spring reliability plus the advanced engineering design allow Kinetrol to offer a guarantee against failure of the spring unit for the lifetime of the mating actuator!

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


Monday, July 25, 2016

Kinetrol Clear Cone Monitor & Solenoid Valve Cut Sheet

The optional Clear Cone provides all round high visibility position monitoring on all limit switch boxes and positioner models. A red/green colour coded monitor is sealed inside a robust, clear polycarbonate cover. Positioner models are marked with black printed legible angle scales.

As an option Kinetrol actuator sizes 03 to 15 can be supplied with integral solenoid valves with NAMUR interface. Air is ported through the actuator body via an adaptor so no external tubing is necessary

See the full cut sheet below:

Thursday, July 21, 2016

Vane Actuators Perform Better: Its All About the Gears (or Lack Thereof)

Why do vane actuators consistently outlast rack and pinion and scotch yoke actuators? The truth is in the gears.

Gears wear.

Surface wear, contact fatigue, scuffing and tooth bending are all real-life issues when dealing with gears. Surface wear affects gear contact in such a way that accelerates failure modes by increasing contact stresses and load distributions. This always leads to reduced accuracy and loss of smooth operation. Wear can never be completely eliminated, and over time, progresses at a more rapid rate.

rack and pinion
Typical rack and pinion design - note gear arrangement
Types of Stress on a Gear
  • Sliding stress - causes surface fatigue damage.
  • Rolling stress - causes contact fatigue damage.
  • Bending stress - like a cantilever beam, always deforms. 


rotary vane actuator
Vane actuator - no gears


Pure simplicity - the rotary vane.

One moving part. No gears.

The rotary vane actuator design is based upon a single moving part which eliminates gears required to convert linear motion to rotary motion. This simple and innovative concept provides an extremely reliable mechanism for operating valves, drives and dampers.

More Accurate Control

Another advantage rotary vane actuators have over rack & pinion and scotch yoke actuators is in smoothness and accuracy of control. The more mechanical connections the actuator has, the greater the cumulative hysteresis, and the lower the control responsiveness and accuracy.

For long, trouble-free performance, choose a rotary vane actuator for your next valve actuation or damper drive requirement. You'll be very glad in the long run. 

Friday, July 15, 2016

The ISO 5211 Valve Mounting Flange and Actuator Connection

Valve with ISO 5211 Flange
Valve with ISO 5211 Flange
ISO 5211 is a European standard that specifies requirements for the attachment of part-turn actuators, with or without gearboxes, to industrial valves.

A standard interface between actuator, valve, solenoids, and positioners  provides many benefits. Actuated valve assemblies are installed in a very wide range of applications and operating conditions resulting in many custom designs. Understanding the connection between these components is critical for long life, safety, and performance.

A standard mounting / connecting device lowers inventory costs and allows for faster maintenance and repair. Standardization also allows for the replacement of brands, so long as both adapt to the standard. Finally, using industry standard adapters maintain consistent specifications and tolerances which improve performance by reducing hysteresis and mechanical wear.

Kinetrol manufactures an ISO adapter for its models 02, 03, 05, 07, 08 and 09 which allows for mounting ISO 5211 valves directly to standard Kinetrol double acting actuators.

For more information about Kinetrol's ISO adapter, please review the document below.

Monday, June 13, 2016

New YouTube Channel Welcome Video

Kinetrol USA is reorganizing and updating its YouTube Channel. Here is the new Welcome video for the channel.



To see all Kinetrol YouTube videos visit https://www.youtube.com/c/Kinetrolusa1

Saturday, April 30, 2016

Spring Return "Deadman" Handles: Certainty of Valve Position When Unattended

Spring Return Handle
Spring Return Handle on Ball Valve
If you want to operate a valve manually, but maintain the advantage of the fail-safe spring’s certainty of position when unattended, check out the Kinetrol's spring return handle.

This uniquely designed manual operator offers some compelling advantages in automating valves and provides additional levels of plant safety.

Spring return (also known as "deadman") handles will help you meet individual plant safety requirements as well as and OSHA requirements for valves that must return to the closed position after operation. Different from lever handle or gear operators which will leave the vale in the last position, the spring return deadman device ensures that the handle will always be driven to its original starting position by the associated spring.

Unique Features Include:
  • Manual unit cannot be left in the wrong position
  • Reliable torque delivery for valve reseat
  • Fire fail-safe option, for fail-safe manual operation of valves
  • Clockwise or counter clockwise 90° spring action 
  • Spring housing sealed to IP65 to protect from internal corrosion
  • ISO5211 female drive & ATEX Category 2 approved options available forKinetrol actuators 02, 03, 05 and 07

Tuesday, March 29, 2016

20 Innovative & Elegant Engineering Improvements for Pneumatic Valve Positioners

Kinetrol AP Pneumatic Positioner
Kinetrol AP Pneumatic Positioner
on top of a Kinetrol Vane Actuator
A valve positioner is an instrument attached to a valve to ensure the valve is at a desired position of opening or closing as per the control signal. Positioners sense the valve position through a position feedback mechanism connected to valve stem. There are many types of valve positioners. Some utilizing pneumatic signals (referred to as pneumatic positioners) and some using electrical current as the signal (referred to as electro-pneumatic positioners). Many manufacturers stake claim over design and performance enhancements, but one pneumatic positioner stands out because of its elegant design. The Kinetrol AP Positioner.

The AP pneumatic positioner combines the smoothness and accuracy of Kinetrol’s proven mechanical positioner technology (using a proportional spool valve driven by a simple, accurate and robust force balance mechanism) with new advances in convenience and simplicity of use, derived from the unique innovative design both of the internal mechanism and of the overall package. 

The result is a positioner with unparalleled performance and real industrial robustness, sweet and easy to calibrate and characterize, and adaptable to the whole range of applications with its unbeatable list of options – high flow valves, direct mount or industry standard discrete mount housings, 4-20mA angle retransmit, limit switches, Clear Cone position monitor and I/P convertors (either simple or with various explosion proof options).

20 Innovative & Elegant Engineering Improvements
  1. ENCLOSURE – robust die-cast metal with tough corrosion-resistant epoxy coating and O-ring sealing. Layout gives easy access to all adjustments on removal of lid.
  2. LID – shown with optional Clear Cone sealed angle monitor. Epoxy coated die–cast metal held on by four captive screws gives quick access to the interior.
  3. CARRIER PLATE ASSEMBLIES – integrated assemblies carrying the feedback shaft and cam plus angle retransmit drive and pot (when specified). Easily removed for conversion or maintenance.
  4. FEEDBACK POT DRIVE – zero backlash, proven trouble free for life.
  5. OPTIONAL ANGLE RETRANSMIT CIRCUIT – externally powered (8–30v DC) linear 4-20mA feedback, rangable down to 30ยบ for full 4-20mA span. Easily accessible zero and span adjustment.
  6. RETRANSMIT POT – high quality conductive plastic servo–type with ball bearings. Proven long life and high precision.
  7. ACTUATOR INTERFACE – options include NAMUR standard (shown), Kinetrol male square or Kinetrol direct mount female square. Quick external conversion allows bracket mounting to any rotary or linear actuator.
  8. INTERCHANGEABLE PORT PLATES – easily convertible for different flowrate options.
  9. INTERNAL ANGLE SCALE – with adjustable indicator for easy field calibration.
  10. EXHAUST SNUBBER SCREWS – allow travel speed reduction down to 1/ 3 x full speed, independently in each direction, by screwing in to restrict exhaust air flow.
  11. GAUGE PORT – as standard.
  12. SPAN ADJUSTMENT – quick and easy thumbwheel setting with slotted locking screw.
  13. ZERO ADJUSTMENT – quick and easy thumbwheel setting with slotted locking screw.
  14. STRAIGHT–LINE MECHANISM – unique geometry allows cw/ccw change over by simple cam inversion.
  15. FEEDBACK CAM – quick and easy reversal ( for rotational sense handing) or replacement (to change the response characteristic) of the cam is facilitated by a spring loaded retention device.
  16. FEEDBACK SHAFT – innovative collet connection permits quick– fit/release of the actuator interface and eliminates backlash.
  17. 3–TERMINAL DIN PLUG – retrofit-able option available for 4-20mA angle retransmit. Allows fully external connection with rapid connect/disconnect capability.
  18. AIRFLOW CHANGEOVER BLOCK – allows selection of direction in which positioner moves (for direct mount models).
  19. SPOOL VALVE – highly reliable, all metal, 5 port proportional valve controls the air flow. Three versions, with different flowrates, are easily interchangeable.
  20. UNIT IDENTIFICATION – each positioner carries a unique serial number and is CE marked.

Tuesday, December 29, 2015

Tough Actuator Service on Paper Plant Green Liquor Line

Pulp and Paper Plant
Pulp and Paper Plant
It's said the only thing a pulp and paper plant doesn't reuse is the "shade the building casts". The processes used in the production of pulp and paper are very efficient when you consider the reuse of energy and by-products. The efficiency comes at a cost though - through very hostile atmospheres and demanding operating conditions for process equipment.

For example, the "kraft process" (also known as the sulfate process) is the method to convert wood chips into pulp and then to cellulose fibers. This is done by mixing the wood chips with sodium hydroxide and sodium sulphate, soaking, cooking and processing.

Here's a very basic explanation of the kraft process. Wood chips are soaked and processed in sodium hydroxide and sodium sulphate mixture known as "white liquor".  After the wood chips are impregnated with white liquor, they are then cooked in digesters to break the wood down into cellulose. The solid pulp is then separated and the remaining fluid is referred to as "black liquor". Black liquor is further processed to remove solids and chemicals which are to be re-used in the pulping process. One of the final by-products is "green liquor" which contains sodium carbonate and sodium sulfide and is then reacted with lime to regenerate more white liquor.

All of these steps expose process equipment, piping, and valves to very tough environments. Kinetrol actuators are preferred in these situations because they don't allow corrosive atmospheres to penetrate the actuator or springs, their long cycle life,  and their epoxy stove enamel finish.

Below is a picture of a Kinetrol model 14 double acting actuator on a 8” full-port ball valve on a green liquor line. The valve cycles 2 times per day to direct green liquor flow and weak wash (weak white liquor) alternatively from one pipe to another in order to prevent solids build up in the pipelines.

Kinetrol Model 14 in Green Liquor Line




Thursday, September 10, 2015

Keeping Critical Turbine Lubrication Flowing

Kinetrol actuator on lube skid
Lube filter diverters
(courtesy of Kinetrol USA)
Power plants generate power 24/7. Their generator turbines are constantly running.  Turbines require lubrication to protect against wear and also for cooling. Maintenance of the lubrication system is critical, and switching between two lube skids is a common way to perform maintenance without shutting down the turbine.

Two 3-way valves and pneumatic actuators are used to re-direct flow between between two lube filter housings. The valve and actuator must be extremely reliable as a failure requires the turbine shutting done.

Steam Turbine
Steam Turbine
(courtesy of Wikipedia)
The automated valves provides an “on-the-fly” ability to transfer turbine oil service between filters, allowing the unit to run, and maintenance to be performed on the filter not in service. This is an extremely critical service to protect the turbine.


Sunday, July 19, 2015

Kinetrol Solves the Toughest Pneumatic Actuator Challenges

Kinetrol pneumatic vane actuators are world-renowned for their high cycle rate, durability, sealed spring unit, and precise control.

Kinetrol provides a rugged, corrosion-resistant pneumatic vane actuator with only a single moving part.

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.

The Kinetrol vane actuator is warranted to operate trouble-free for 4,000,000 (million) cycles.



For more information, contact:

KinetrolUSA
1085 Ohio Drive
Plano, Texas 75093
(972) 447-9443 phone
(972) 447-9720 fax
sales@kinetrolusa.com

Saturday, July 11, 2015

An Extremely Accurate and Precise Valve Positioner

The EL electropneumatic positioner combines the precision and adaptability of a digital electronic control circuit with the smoothness and efficiency of Kinetrol's proven proportional servo valve, to give the best available 4-20mA positioning performance from rotary pneumatic actuators. 

This unbeatable performance is combined with the easiest available setup procedure, easiest access to all functions and options, easy connectibility, and a truly compact all-metal enclosure, plus unique easy-set isolated angle retransmit and limit switch options inside the same enclosure.

Features
  • Fast, smooth and precise control from a digital circuit and proportional servo valve 
  • Simple time saving field set up
  • Quick calibration via push buttons and LED feedback and easy reversal of rotation sense (clockwise/counter clockwise) without special tools or parts change. 
  • Universal application
  • The unit can be mounted in any orientation on to any quarter turn or linear application by connection via a NAMUR or Kinetrol square interface. 
  • Loop powered
  • No separate power needed, just a 4-20mA signal plus air supply. 
  • Integral options - easily retrofitted modules include:
    • Two wire 4-20mA isolated angle retransmit 
    • Mechanical or inductive position indicator switches (general or hazardous areas) 
    • Clear Cone high visibility indicator 
    • Threaded conduit entries or DIN plugs for external connection.
  • Intrinsically safe approved options 
  • Weatherproof, compact and robust metal housing 
  • Zero backlash coupling with easily adjustable switch strikers 
  • Vibration and shock resistant to 4G 
  • Built in gauge ports/external connections

Friday, June 19, 2015

Work with a Valve Automation Professional on Your Next Project for Improved Outcome and Efficiency

Valve Sales Professional
The valve automation
sales professional
will help with your next project.
Projects requiring engineered valve systems are best completed and accomplished through the proper selection and application of the valves, actuators, positioners, limit switches and other associated components. A great resource exists, ready to provide a high level of technical knowledge and assistance, that can be easily tapped to help you with your project - the valve automation sales professional.

Local distributors and representatives who sell industrial valves, actuators and controls also provide services and equipment that will save you time, money, and help you achieve a better outcome for the entire project.

Consider a few elements the valve automation professional brings to your project:

Product Knowledge: Valve automation professionals are current on product offerings, proper application technique, and product capabilities. They also posses  information on future product obsolescence and upcoming new designs. This type of information is not generally accessible to the public via the Internet.

Experience: As a project engineer, you may be treading on new ground regarding some aspects of your current valve system design assignment. There can be real benefit in connecting to an experienced and highly knowledgable source, with past exposure to your current challenges.

Access: Through a valve automation professional, you may be able to establish a connection to “behind the scenes” manufacturer contacts with essential information not publicly available. The rep knows people at the factories, a well as at other valve related companies, who can provide quick and accurate answers to your valve automation related questions.

rotary vane actuator
Article courtesy of Kinetrol USA
Of course, any valve actuation or automation solution proposed are likely to be based upon the products sold by the representative. That is where considering and evaluating the benefits of any solution becomes part of achieving the best project outcome.

Develop a professional, mutually beneficial relationship with a local valve automation professional to make your design job go after, more efficiently, and more cost effective. Their success is tied to your success, and they are eager to help you.

Wednesday, June 10, 2015

Use Vane Actuators on the Toughest Applications

Vane Actuator
Use vane actuators on
tough applications.
The "vane type" pneumatic valve actuator is well regarded for its simplicity in design and extremely long life, even in the toughest valve actuation applications.

The heart of this simple design, and the primary reason for such long life, is the "single moving part" - a one-piece shaft and vane that moves in response to the air pressure differential on either side of the vane. A rotary vane actuator has no gears or yokes which will wear and cause problems over time. Wear, movement slop, and internal corrosion are the most typical modes of failure for rack and pinion and scotch yoke actuators.

The video below illustrate the elegance and simplicity of the rotary vane actuator and its "single moving part".

Monday, May 18, 2015

Kinetrol Pneumatic Rotary Vane Actuator Product Selection

Here is an easy-access, online vane actuator catalog from Kinetrol that includes pneumatic actuators, spring return units, positioners, indicators, limit switches, solenoid valves, and other valve actuation equipment.