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

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

Kinetrol Manual Failsafe Handle from Kinetrol USA

Troubleshooting & Set Up Guide for Kinetrol EL Positioners

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.

Illustrated Troubleshooting & Set Up Guide for Kinetrol EL Positioners from Kinetrol USA

Superpulsator Vent Valve Operation Demands Performance

Kinetrol on Superpulsator Vent Valve

Water treatment involves multiple physical, chemical and biological processes that transform raw water into drinking water. Clarification, which includes the removal of excessive color or turbidity of raw water to produces clear uncolored water, is one of these processes. Clarification typically includes coagulation, flocculation and settling.

A Superpulsator unit is a simple type of clarification system utilizing an upward flow tank and inclined plate settling.  It operates by varying the level of the flocculation tank through the use of a vacuum pump and vent valve. The pump creates a vacuum in the tank causing the water level to rise. A vent valve then opens to atmosphere causing the water level to fall. The valve is then closed, and the process repeats itself continuously. The actuated vent valve is controlled by a timer set to pre-defined vacuum and vent cycles.

A Kinetrol USA Distributor was called in to assist in a water treatment plant’s upgrade to superpulsators. After reviewing the application, the Distributor specified 4" plug valves actuated with Kinetrol vane actuators and Kinetrol ULS limit switches. The plant’s original system was using double acting, air cylinder operated valves. These had to be replaced because they wouldn't be able to withstand the superpulsator's constant vacuum and venting cycling. The more robust Kinetrol actuator, capable of very high cycle rates, was clearly the best choice.

After installation and startup, and several years in operation, the Kinetrol actuators are performing flawlessly and are providing maintenance-free operation.

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

20 Innovative & Elegant Engineering Improvements for Pneumatic Valve Positioners

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 30º 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.

Kinetrol Actuators on Thermoplastic Valves

Kinetrol Actuator on
Thermoplastic Valves

Thermoplastic valves are becoming the material of choice for more and more chemical process applications. Benefits are numerous: affordable cost, ease of installation, superior chemical resistance, abrasion resistance, light weight, ability to meet high purity standards, and long life expectancy.

The thermoplastics used for valves include Polyvinyl chloride (PVC), Acrylonitrile-Butadiene-Styrene (ABS), Glass Fibre Polypropylene (GRPP), Anti-Static Polypropylene (ASPP), and Polyvinylidene fluoride (PVDF). Plastic valves are proving themselves time and again in commercial and industrial applications such as wastewater treatment, water distribution, primary metals, food and pharmaceuticals, chemical processing, power generation, and oil refineries.

For example, many chemicals used to treat drinking water and wastewater use plastic valves because they stand up to the caustic and aggressive chemicals such as sodium hypochlorite, sodium hydroxide, sodium bisulfite, hydrofluosilisic acid and potassium permanganate.

Kinetrol Actuator on
Thermoplastic Valves

In the high purity industries such as the semiconductor industry, fluoropolymer valves are required for aqueous chemicals, solvents and slurries.  In these applications chemical contamination must be less than 100 parts per trillion (ppt) total contamination from the entire piping system (including valves, fittings, tubing, filters and instrumentation). Other ultra-pure application examples are microelectronics, medical devices and pharmaceutical production.

Thermoplastic valves are sensitive to temperature changes and experience a higher degree of thermal expansion and contraction than their metal counterparts, but most agree the advantages far outweigh these concerns.

The key to actuating plastic valves is like any other valve system - understanding the operating requirements of system. It's important to remember that since most plastic valves are used on corrosive media, there's a fair chance the actuator may be exposed to corrosives as well. Effects on the actuator housing, internal parts, and any springs have to be considered. In most cases the actuator will have to be specially coated or come with a corrosion-resistant epoxy finish. Kinetrol actuators fit the bill as they come standardly with an epoxy stove enamel finish and stainless steel internal and external hardware, and Kinetrol spring units are totally sealed from the atmosphere, protecting the spring element and assuring long life.

Kinetrol Actuators on Dilute and Dense Phase Conveying Diverters

Kinetrol actuator on dense phase diverter valves

Pneumatic conveying systems transfer powders, granules, and other dry bulk materials through an enclosed horizontal or vertical conveying line. Pressure differential and air flow is the motive force in pneumatic conveying. Through control of pressure or vacuum and the airflow inside the conveyor, the system can successfully move material.

Pneumatic conveying systems are classified into two types by their operating principle: dense phase and dilute phase.

The most common is dilute phase pressure conveying. Used for powders or granules, and most often with non-abrasive, non-fragile materials that have a light bulk density. Common examples are plastic granules, sugar,  flour, corn starch, activated carbon, zinc oxide, hydrated lime, and sodium bicarbonate. Dilute phase vacuum conveying is for materials that compress under pressure, for toxic materials, and are conveyed over short distances at low capacities.

Kinetrol on diverter valves

Dense phase pressure conveying is best for conveying fragile or abrasive materials over long distances. Commonly handled materials include feldspar, fly ash, silica sand, alumina, sorbitol, dextrose, carbon black, resins, cocoa beans, nuts, and certain cereals. Dense phase pressure conveying moves materials at a relatively low speed to reduce materials degradation, air consumption, and wear and tear on mechanical systems.

Diverters are used to direct the flow of conveyed material to branch lines. Because they are handling materials such as sand, gravel, whole grains, stone, cement, and coal, the diverter must be designed for handling very abrasive materials and for high cycles. Not only must the diverter be designed for this service, but the pneumatic actuator must also meet theses demanding requirements.

Kinetrol actuators have become the preferred quarter-turn pneumatic actuator for conveying diverters because of their dependability and ability to withstand tough operating environments. Kinetrol actuators are virtually immune to the high vibration, dusty atmospheres and provide years of maintenance free operation.