Showing posts with label Kinetrol. Show all posts
Showing posts with label Kinetrol. Show all posts

Thursday, December 6, 2018

Why Do Kinetrol Actuators Last So Long?


Kinetrol actuators are known world-wide for their extremely long service life, even in harsh environments. Here are a few reasons why.

KintrolUSA.com
972-447-9443

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.

Monday, August 20, 2018

New EL Positioner Installation Video from Kinetrol USA

The video below is new from Kinetrol USA and provides detailed instructions on how to install a Kinetrol model EL electro-pneumatic positioner.

The EL positioner controls airflow to an actuator and moves it to a position determined by a 4-20mA signal and using a unique low power proportional servo valve. The combination of EL positioner and Kinetrol vane actuator provide fast, smooth and precise control for industrial valves and dampers.


Wednesday, March 21, 2018

Epoxy Stove Enamel Finish: A Kinetrol Advantage

Kinetrol actuators are well-known for their bright yellow, epoxy stove enamel finish. This coating is engineered to protect the exterior of their pneumatic actuators and accessories. But what is "epoxy stove enamel"?

Epoxy stove enamel is a high quality stoving finish that provides excellent adhesion to a substrate. Epoxy stove enamel forms a very hard, abrasion resistant, chemical and solvent resistant coating that stands up to many extreme environmental conditions. Epoxy stove enamel finish provides high level chemical/corrosion resistant qualities, and is used often in applications such as machinery, industrial equipment, and heavy duty transport machinery.

Kinetrol actuators are engineered specifically for high-cycle, dirty, and corrosive applications. The combination of epoxy stove enamel finish and stainless steel external hardware provide Kinetrol actuators outstanding protection from dirt and harmful chemicals.

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

Tuesday, March 13, 2018

Who makes the most reliable industrial valve actuator?

With millions of actuators performing reliably around the world, the Kinetrol vane actuator's outstanding cycle life, smooth and precise movement, and environmentally rugged design makes it the best choice for all of your valve actuation needs.

https://kinetrolusa.com


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. 


Wednesday, December 13, 2017

Kinetrol Actuator Feature Video

Here's a new Kinetrol vane actuator feature video. Please take a minute to watch. Hope you enjoy.

Thursday, November 30, 2017

Vane, Shaft and Seal Design: The Critical Difference in Pneumatic Rotary Valve Actuators

lower quality vane
Kinetrol
Click images for larger view.
The vane actuator produces rotary motion through the application of air pressure to a "vane' attached directly to an output shaft.

There are several manufacturers of pneumatic, rotary vane valve actuators on the market. Outwardly they appear similar. Internally, there's a world of difference in their design and their performance.

2 piece vanelower quality vaneIn higher quality vane actuators, the vane and shaft are machined from a single piece of steel. Casting and machining adds cost, but also adds performance. Lower quality actuators save cost by using a 2-piece vane/shaft combination. These are more likely to be affected by backlash or lost motion.  In other words, a one-piece shaft and vane assembly transfers 100 percent of the vane movement directly to the shaft. Two-piece designs may lose movement over time, reducing control and accuracy.

Kinetrol vaneHigher quality pneumatic vane actuators incorporate a pair of “lip seals” around the vane. The durable and resilient polyurethane seals provide two key benefits; eliminating the need for o-rings; and eliminating shaft seals. Dual, opposing lip seals are located each side of the vane. They isolate the vane and shaft from the air supply and create an area from the shaft through the center of the vane that remains unpressurized, eliminating the need for pressure seals around the top and bottom of the shaft.

Some lower quality vane actuator designs use an o-ring around the entire vane, exposing the o-rings to mechanical stress and rolling. Higher quality actuators back their polyurethane lip seals with stainless steel expanders that maintain the integrity of the seal to the actuator housing.

Kinetrol vaneThe heart of the pneumatic vane actuator is simple design. Manufacturers often promote the concept of "a single moving part", referring to the vane/shaft/seal assembly. But despite this claim, all pneumatic vane actuators are not the same. You owe it to yourself and your organization to "look under the hood".  See what level of engineering and quality you're really getting.

Monday, November 27, 2017

How Kinetrol Pneumatic Rotary Vane Actuators Work

Kinetrol pneumatic rotary vane actuators use a one piece vane and shaft produce rotary torque on the shaft output drive. The vane is assembled inside a 2-piece clam-shell enclosure. The presence of the vane creates two air chambers. By pressurizing and venting opposing chambers, the resulting pressure differential across the vane provides torque to the shaft. Torque output of the rotary vane actuator remains constant throughout the full rotation of the shaft.

http://www.kinetrolusa.com | 972-447-9443

Tuesday, October 31, 2017

14 Reasons to Choose the Kinetrol AP Pneumatic Valve Positioner

AP postioner on Kinetrol actuator
AP postioner on Kinetrol actuator.
The AP pneumatic positioner combines smoothness and accuracy with convenience and simplicity of use. It provides unparalleled performance and real industrial robustness, easy calibration, and is well adapted to a whole range of valve and damper applications. AP options include high flow valves, direct mount or industry standard discrete mount housings, 4-20mA angle retransmit, limit switches, Clear Cone position indicator as well as I/P convertors. Below are 14 features that make the AP positioner a standout among all other valve positioners.
  1. Enclosure and Lid – 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. Spool Valve – highly reliable, all metal, 5 port proportional valve controls the air flow. Three versions, with different flowrates, are easily interchangeable.
  3. Carrier Plate Assembly – integrated assemblies carrying the feedback shaft and cam plus angle retransmit drive and pot (when specified). Easily removed for conversion or maintenance.
  4. Interchangable Port Plate – easily convertible for different flowrate options.
  5. Feedback Pot Drive – zero backlash, proven trouble free for life.
  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, Kinetrol male square or Kinetrol direct mount female square. Quick external conversion allows bracket mounting to any rotary or linear actuator.
  8. Internal Angle Scale – with adjustable indicator for easy field calibration.
  9. 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.
  10. Gauge Port – as standard.
  11. Span and Zero Adjustment – quick and easy thumbwheel setting with slotted locking screw.
  12. 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.
  13. Feedback Shaft – innovative collet connection permits quick – fit/release of the actuator interface and eliminates backlash.
  14. Airflow Changeover Block – allows selection of direction in which positioner moves (for direct mount models).


Tuesday, October 10, 2017

9 Kinetrol Features Providing Unmatched Actuator Performance

  1. Long life epoxy or PTFE internal finish
  2. Easy stop adjustment at each end of stroke for accurate seating
  3. Corrosion resistant zinc (non-incendive) or aluminium alloy case
  4. Integral vane/shaft casting - only one moving part
  5. Manual override square and position indicator
  6. Stainless steel expanders ensure long term lipseal / case contact
  7. Double opposed, Polyurethane, lip seals for effective sealing and long maintenance free life
  8. Space filling/energy absorbent sideplates (polymer or metal)
  9. Durable epoxy stove external enamel finish


Kinetrol USA - http://www.kinetrolusa.com | 972-447-9443

Thursday, June 22, 2017

Pneumatic Actuator Application Guide for The Asphalt Industry

There are two main types of asphalt plants, batch and continuous. Batch plants are the most widespread and offer the greatest flexibility. Single batch mixes can be produced per each customer’s requirements. Individual components are weighed and metered separately every 50-60 seconds to produce a complete batch. Continuous plants produce single mix asphalt in large quantities without interruption. The production system is simplified, which reduces maintenance, but offers less flexibility.

The following Application Guide concentrates on batch plants, although similarities exist between both.

You can read the guide below, or download it from Kintrol USA'a site here.

Thursday, February 9, 2017

The Role of Industrial Valve Actuators

Kinetrol pneumatic actuators installed on pipeline.
Kinetrol pneumatic actuators installed on pipeline.
Valves are essential to industry. Valve automation refers to
the electric, pneumatic, or hydraulic systems deployed to
open, close or position the valve.
Valves are essential to industries which constitute the backbone of the modern world. The prevalence of valves in engineering, mechanics, and science demands that each individual valve performs to a certain standard. Just as the valve itself is a key component of a larger system, the valve actuator is as important to the valve as the valve is to the industry in which it functions. Actuators are powered mechanisms that position valves between open and closed states; the actuators are controllable either by manual control or as part of an automated control loop, where the actuator responds to a remote control signal. Depending on the valve and actuator combination, valves of different types can be closed, fully open, or somewhere in-between. Current actuation technology allows for remote indication of valve position, as well as other diagnostic and operational information. Regardless of its source of power, be it electric, hydraulic, pneumatic, or another, all actuators produce either linear or rotary motion under the command of a control source.

Thanks to actuators, multiple valves can be controlled in a process system in a coordinated fashion; imagine if, in a large industrial environment, engineers had to physically adjust every valve via a hand wheel or lever! While that manual arrangement may create jobs, it is, unfortunately, completely impractical from a logistical and economic perspective. Actuators enable automation to be applied to valve operation.

Pneumatic vane actuator with spring return and positioner
Pneumatic vane actuator
with spring return and positioner
on plastic body valve.
Pneumatic actuators utilize air pressure as the motive force which changes the position of a valve.
Pressurized-liquid reliant devices are known as hydraulic actuators. Electric actuators, either motor driven or solenoid operated, rely on electric power to drive the valve trim into position. With controllers constantly monitoring a process, evaluating inputs, changes in valve position can be remotely controlled to provide the needed response to maintain the desired process condition.

Manual operation and regulation of valves is becoming less prevalent as automation continues to gain traction throughout every industry. Valve actuators serve as the interface between the control intelligence and the physical movement of the valve. The timeliness and automation advantages of the valve actuators also serve as an immense help in risk mitigation, where, as long as the system is functioning correctly, critical calamities in either environmental conditions or to a facility can be pre-empted and quickly prevented. Generally speaking, manual actuators rely on hand operation of levers, gears, or wheels, but valves which are frequently changed (or which exist in remote areas) benefit from an automatic actuator with an external power source for a myriad of practical reasons, most pressingly being located in an area mostly impractical for manual operation or complicated by hazardous conditions.

Thanks to their versatility and stratified uses, actuators serve as industrial keystones to, arguably, one of the most important control elements of industries around the world. Just as industries are the backbones of societies, valves are key building blocks to industrial processes, with actuators as an invaluable device ensuring both safe and precise operation.

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, January 29, 2017

Pneumatic Vane Actuators Can Now Be Used in Foodservice Wash-down Applications

Kinetrol Blueline Foodservice Actuator
Kinetrol Blueline Foodservice Actuator
(Double-acting)

Finally, food and beverage processing companies can take advantage of the long-life and headache-free performance of Kinetrol vane actuators.

Kinetrol USA has officially introduced it's "Blueline" Series of pneumatic vane actuators for use in foodservice and beverage processing. The actuators are intended to be installed in areas where harsh chemical wash-down is required. These areas are very tough on most types of pneumatic actuators because the caustic or acidic chemicals used in cleaning adversely effect the actuator. All stainless steel actuators are an alternative, but they are prohibitively expensive. Kinetrol's Blueline Series provides a very economical option.

Kinetrol Blueline Foodservice Actuator
Kinetrol Blueline Actuator
(Spring-return)
Blueline Actuators are permitted for use in contact with food in compliance with the Federal Food, Drug and Cosmetic Act (FDA) and all applicable regulations, including 21 CR 175.300 (Code of Federal Regulations). The new actuator has an applied coating that meets with the FDA's allowance whereby "Resinous and polymeric coatings may be safely used as the food-contact surface of articles intended for use in producing, manufacturing, packing, processing, preparing, treating, packaging, transporting, or holding food ...".

The Blueline Series provides food and beverage processors all the time-proven benefits of the Kinetrol PLUS provides an affordable option for tough chemical wash-down areas. 

Kinetrol Blueline Features:
  • Very good resistance to "caustic wash-down" procedures as typically performed in the food industry.
  • Very good resistance to corrosion In salt laden environments.
  • Very good non-stick properties.
For more information, contact Kinetrol at 972-447-9443.

Wednesday, January 25, 2017

More Kinetrol Vane Actuators Hard at Work!

Here is a another short video of Kinetrol pneumatic vane actuators taking on some of the toughest industrial valve and damper applications.

Kinetrol engineered the first rotary vane actuators in 1958. The rotary 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 or call 972-447-9443.


Sunday, November 20, 2016

Actuator Sensor Interface for Kinetrol Vane Actuators

AS Interface
Kinetrol AS Interface
Devices conforming to the AS interface (Actuator Sensor interface) set of open specifications are used to make up control systems based on a two-wire communication cable known as a bus. Up to 31 actuators and sensors (“slaves”) can be connected to the AS interface bus, and can be controlled or monitored by means of a digital signal sent via the bus to and from a “master” device (which can be a computer or a PLC).

The slave devices will always function in response to commands sent by the master device, either to actuate, or to return a message reporting the value of a sensed variable, or both. The AS interface 2.1 specification allows 31 slave devices to be powered by a DC voltage fed into the same two-cable wire used as the communication bus, with allowed power consumption adequate to drive the slave plus a standard pneumatic solenoid valve. Under extended addressing, a maximum of 62 slave devices can be connected via one bus, but specified limits on device capacitance make this applicable only to systems with limited numbers of solenoid valves, or with a special scheme to get round the limit (see overleaf).

An AS interface bus can be used as the final field link in a more complex hierarchy of devices making up a large plant-wide control system. Actuators and sensors must often be installed in unprotected environments where conditions can be demanding; the AS interface bus is ideal for using as the link between these field devices and the “indoor” equipment making up the upper part of the control system.

AS interface is well suited to on/off control and monitoring, and is a good choice when a simple economical, reliable and robust solution is required to control and monitor a series of actuators and sensors in a process control or machine application. Kinetrol’s AS interface Universal Limit Switch Box is designed to meet all of these requirements.


The Kinetrol AS interface circuit board is fitted inside a standard actuator-mounted Kinetrol Universal Limit Switch Box (2 or 4 entry), so that the actuator (and up to 30 others like it) can be controlled, monitored and powered directly via a single two-conductor digital communication cable (or bus), using the open AS interface 2.1 standard. All the advantages of the limit switch box (all-metal construction, corrosion resistant, up to IP67 sealing, easy connection, easy setting of limit switch strikers etc - see KF487 literature) combined with the highly specified AS interface circuit to give unique levels of practicality, genuine industrial quality, and use-anywhere adaptability.

See thr full feature set and documentation below.

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