Commissioning the ROTORK CK Range Valve Actuators

The Rotork CK actuator range has been designed to meet the needs of diverse actuation applications required by the valve industry and its customers. The modular design concept enables quick product configuration from stock to customer specification with a very short lead time. 

The CK range provides the customer with a range of options to suit all of their actuation requirements. Rotork CK actuators are designed for minimum user interaction. Their primary goal is to provide safe and reliable actuation in harsh environments. 

The modular CK product range offers simple, robust actuators (CK/CKr) suited to harsh environments with the option for two different control packages (Atronik and Centronik) to meet exact site requirements. Atronik offers modest control and feedback for a simple integrated starter solution. Centronik offers advanced control and feedback for more complex site system integration and increased flexibility through remote mounting. 

For questions about all ROTORK products in Northern California and Nevada, contact CTi Controltech.

https://cti-ct.com
925-208-4250

Flowserve Valve, Actuation and Instrumentation Portfolio

The Flowserve valve, actuation and instrumentation portfolio includes world-class quarter-turn, rotary, linear, control and special configuration valves. Additionally, Flowserve also offers precision actuation and instrumentation for every application, from remotely controlled, fully automated electric, hydraulic and pneumatic actuators to electronic positioners and level switches . Fail-safe isolation, on-off modulation and precision process control ensure efficient and reliable operation, even in the most hazardous environments.

Flowserve valve and actuator products deliver industry-leading performance and reliability, with embedded technologies that make them easy for operators to use and maintain. By coupling their control solutions with real-time system analysis, predictive maintenance and remote service capabilities, today's manufacturing plants get end-to-end intelligence that maximizes their uptime.

View the embedded document below, or download your copy of the Flowserve Valve, Actuation and Instrumentation Portfolio here.

CTi Controltech
https://cti-ct.com
925-208-4250

Flowserve Valve, Actuation and Instrumentation Portfolio from CTi Controltech

Master-Martyr Valve Arrangements

Electric actuator for industrial valves.
Image courtesy Rotork

Some industrial fluid flow applications are best served with what is known as a master-martyr valve set. Let's look at this arrangement and how it is used.

Valves are used to regulate flow. They are also applied to isolate portions of a fluid system by providing positive leak free shutoff. A master-martyr valve set utilizes two valves, with the performance of each targeted at differing performance goals. By coordinating the operation of the two valves, operational benefits accrue.

The master valve serves as the isolating valve. It will be located upstream of the martyr valve. The master valve provides fully open or fully closed operation and is commonly selected to accommodate the most severe operating condition anticipated in the system. Usually, this valve is normally open and is designed to contribute little to no pressure drop to the fluid flow. A good example is a full port metal seated ball valve. It offers very low pressure drop, substantial resistance to system pressure or heat, and can be driven from fully open to closed positions quickly.

The martyr valve provides flow regulation or throttling and is not intended to be the positive means of shutoff for the fluid flow. This valve will experience a range of pressure drop, possibly some flashing, or other conditions that, along with the frequent repositioning applied to the valve, will serve to produce wear and tear on the mechanism. Generally, the martyr valve is expected to wear out from normal operation and need servicing or replacement. The master valve, located upstream, serves as a point of isolation that allows the martyr valve to be easily serviced.

The overall goal is to operate the master valve as little as possible and expose it to the lowest possible pressure drop. Generally, this will call for the master valve to be opened first and closed last.

There are numerous potential applications for this valve arrangement. Smart actuators can function within the control system by delivering information about valve position and service level, as well as responding accurately to system commands. Share your fluid flow control challenges and applications with valve automation specialists. Leverage and effective solution by combining your own knowledge and experience with their product application expertise.

Patented Ballcheck Valve Eliminates Potential Commissioning Error

When using a ballcheck valve and commissioning a gauge assembly on a vessel containing liquid, a common mistake is to open the valve too quickly and engage the ball check. This will result in a false reading on the gauge. The 360 Series valve, from Jerguson, makes it impossible to get a false level reading during commissioning. The short video shows how the patented feature of the 360 simplifies commissioning by avoiding errors.

• Eliminate false level readings during commissioning
• Clean-out port enables internal inspection
• Handle clearly indicates open or closed position of valve
• Certifications for common applications
• Lock-out / tag-out capability is standard

More information on this and related level gauge products is available from product specialists. Share your challenges with application experts and develop an effective solution by leveraging your own knowledge and experience with their product application expertise.

High Performance Butterfly Valves for Challenging Process Fluid Conditions

High performance butterfly valves handle challenging
 media and process conditions.
Image courtesy Flowserve - Valtek Control Products

Industrial process control applications can present stringent and challenging performance requirements for the physical equipment and components that comprise the process chain. The valves employed in fluid based operations need to be resistant to the impact of extreme fluid conditions, requiring careful design and selection consideration to assure proper performance and safety levels are maintained in a predictable way.

Industrial valves intended for extreme applications are generally referred to as severe service or high performance valves. While there are plenty of published and accepted standards for industrial valves, one does not exist to precisely define what constitutes a severe service valve.

So, how do you know when to focus valve selection activities on severe service or high performance valves, as opposed to those rated for general purpose? There are a number of basic criteria that might point you in that direction:

• Extreme media or environmental temperature or pressure
• High pressure drop operation that may cause cavitation
• Rapid or extreme changes to inlet pressure
• Certain types or amounts of solids contained in the fluid
• Corrosive media

Certainly, any of these criteria might be found in an application serviceable by a general purpose valve, but their presence should be an indicator that a closer assessment of the fluid conditions and commensurate valve requirements is in order. The key element for a process stakeholder is to recognize when conditions are contemplated that can exceed the capabilities of a general purpose valve, leading to premature failure in control performance or catastrophic failure that produces an unsafe condition. Once the possibility of an extreme or challenging condition is identified, a careful analysis of the range of operating conditions will reveal the valve performance requirements.

There are numerous manufacturers of severe service or high performance valves, each with specialized product offerings focusing on a particular performance niche. Flowserve, under their Valtek brand, manufactures the Valdisk high performance butterfly valves ranging from NPS 2-52 and ASME class 150, 300, 600, 900, 1500 pressure ranges. The valve design is ideal for manual or automated actuation, installed with a manual hand gear, electric actuator, or a pneumatic actuator. Seats are available as soft or metal on this double offset butterfly valve that provides tight closure for bi-directional flow. Construction materials include carbon steel and stainless steel. A range of options and variants are available to customize the valve build to suit a replacement or new installation.

There is more information available about the Valtek high performance valve offering. Share and discuss your special requirements with a valve specialist. They have application experience and access to technical resources that can leverage your own process knowledge and experience into an effective solution.

Combustion, Emission, Steam, Valve, Automation and Instrumentation Solutions

Cti Controltech delivers process measurement and control
solutions across many industries.

CTi Controltech brings knowledge, experience and expertise to their customer relationships. We carry a broad range of process control, combustion and steam related products manufactured by globally recognized companies, along with the contracting and engineering resources to deliver complete solutions to customer challenges. CTi Controltech, located in Northern California, is a top flight provider of valves, valve actuation, emissions control and monitoring, industrial burners and boilers, pressure, temperature, level and flow instrumentation, custom SCR sytems, and steam management products. We craft solutions to the challenges our customers face everyday in process control.

Combustion, Emission and Steam Solutions

• Low and ultra low NOx burners and burner retrofits 
• BMS and CMS system design and hardware 
• Custom design SCR Systems 
• Burner air fuel mix recalibration 
• Pre-emission test and boiler tune-ups 
• Heat rate, efficiency studies and plant improvement 
• Vapor recovery 
• Particulate and CO2 control 

Valve and Automation Solutions

• Severe service valve sizing and selection 
• Valve and actuation packages, pneumatic, hydraulic and electric 
• Noise and cavitation control 
• Total valve management programs 
• Turbine by-pass 
• Desuperheating and attemperation 
• Damper drives 
• Check valves 
• Vent to atmosphere and silencers 
• Best fit for purpose replacement recommendations 
• Ease of operation and life cycle cost considerations 

Pressure Relief

• Rupture disc 
• Pressure/Vacuum Relief Valves 
• Pressure Relief Valves 
• Vacuum Relief Valves 
• Pilot Operated Valves 
• Flame and Detonation Arresters 
• Emergency Relief Valves 
• Waste Gas Burners 
• Pressure Regulators 

Instrumentation Solutions

• Flow, level, pressure, density and temperature 

Services

• Factory trained service personnel 
• Commissioning and startup technical support 
• Technical seminars and training 
• Valve and actuator calibration and startup 
• Instrument calibration and startup 
• Complete turnkey project capabilities 
• U.L. 508 custom design 
• Project CAD drawings 
• PLC Programming 
• CFD and modeling 

Smart Position Indicator for Multi-Turn Valves

Model SPI Smart Position Indicator
Image courtesy Rotork

Centralized control systems need information in order to function. Reliable indication of valve position rates as essential information in maintaining fluid process control operations.

The Rotork product lineup includes the SPI Smart Position Indicator. Installed on multi-turn manual valves, the unit provides a reliable open/close signal to a control system. The unit is housed and constructed to provide maintenance free operation in an industrial environment. Commercially available switches from recognized manufacturers are used in the indicator for signalling. More detail is provided in the datasheet included below.

Share your valve automation challenges with application experts, leveraging your own knowledge and experience with their product application expertise to develop effective solutions.

Smart Position Indicator for Industrial Valves from CTi Controltech

Pneumatic Control Valve Positioners

Smart valve positioner
Courtesy Rotork

Valve positioners can provide process operators with a precise degree of valve position control across the valve movement range, as well as information about valve position. A relationship exists between applied pneumatic signal pressure and the position of the valve trim. The relationship between the two elements is dependent upon the valve actuator and the force of the return spring reacting to the signal pressure. In a perfect world, the spring and pneumatic forces would reach equilibrium and the valve would return to the same position in response to an applied signal pressure. There are other forces, however, which can act upon the mechanism, meaning the expected relationship between the original two elements of pressure and position may be offset. For example, the packing of the valve stem may result in friction, or the reactive force from a valve plug resulting from differential pressure across the area of the plug may be another.
While these elements may seem minor, and in some cases they are, process control is about reducing error and delivering a desired or planned output. Inclusion of a positioner in the valve assembly can ensure that the valve will be set in accordance with the controller commands.

Each positioner functions as a self-contained small scale control system. The first variable in the positioning process is the current valve position, read by a pickup device incorporated in the positioner. A signal which is sent to the positioner from the control system, indicating the desired degree of opening, is used as the setpoint. The controller section of the positioner compares the current valve position to the setpoint and generates a signal to the valve actuator as the output of the positioning process. The process controller delivers a signal to the valve, and then the positioner takes that signal and supplies air pressure required to accomplish the needed adjustment of the stem position. The job of the valve positioner is to provide compensatory force and to act as a counterbalance against any other variables which may impact valve stem position.

Magnetic sensors can be employed to determine the position of the valve stem. The magnetic sensor works by reading the position of a magnet attached to the stem of the valve. Other technologies can be employed, and all have differing ways of overcoming degrees of inaccuracy which may arise with wear, interference, and backlash. In addition to functioning as a positioner, control valve positioning devices can also function as volume boosters, meaning they can source and subsequently ventilate high air flow rates from sources other than their pneumatic input signal (setpoint). These devices can positively affect and correct positioning and velocity of the valve stem, resulting in faster performance than a valve actuator solely reliant on a transducer.

The inclusion of a positioner in a control valve assembly can provide extended performance and functionality that deliver predictable accurate valve and process operation. Share your valve automation requirements with a knowledgeable valve automation specialist and combine your process knowledge and experience with their product application expertise to develop an effective solution.

Oil and Gas Wellhead Valves Meet Special Application Challenges

Slab Gate Valve
Courtesy Flowserve - Valbart

Industrial valves are manufactured in a huge array of configurations to accommodate the specialized needs of a broad range of industrial process applications. The oil and gas industry is but one segment of many throughout the industrial sphere that presents its own set of application specific criteria.

Oil and gas production, essentially pulling raw material from the earth, has unique valve performance challenges. Extreme pressure and abrasive or erosive material are common elements of oil and gas production at the wellhead. The valves also need to tolerate the range of outdoor temperatures at the production site. Safe and reliable operation throughout these and a range of other conditions are part of the design criteria for these valves. Here are some of the specific valve variants and configurations applied in the oil and gas industry at the production wellhead.

Rising Stem Ball Valve
Courtesy Flowserve - Valbart

• Slab Gate Valve - Provides metal to metal seal and employs parallel gate and seal with a preloaded means of assuring positive upstream and downstream seal. Full port design allows for pigging.
• Expanding Gate Valve - A parallel expanding gate seals positively against both seats, which are protected from the flow medium in the open and closed positions.
• Mud Gate Valve - Designed to provide positive closure under rigorous field conditions with abrasive media. 
• Adjustable Choke Valve - Designed to regulate production well flow and downstream pressure. Different trim configurations provide appropriate levels of control.
• Needle Adjustable Choke Valve - Utilizes different trim arrangement than other types to provide good flow management, abrasion resistance, erosion resistance, and reliable service over a long life with low maintenance requirements.
• Check Valve - Check valves of various types are utilized throughout practically all fluid flow operations, essentially anywhere that fluid is supposed to flow in only one direction. Oil and gas production presents some special conditions of abrasion, erosion, and pressure that call for special accommodation in design and materials of construction.

There are other specialty valves employed at or near the wellhead, but the key take away here is that oil and gas production generally cannot be accommodated by general purpose valves. Share your oil and gas production challenges with a valve specialist. The combination of your process and production field experience with their product expertise will produce effective solutions.

Electric Control Valve Actuators

CVQ Electric Valve Actuator
For quarter turn valves
Courtesy Rotork

Many process control valve installations present the option of selecting either electric or pneumatic actuators as part of the control component train. Pneumatic actuators have been in use for many years, but advances in electric motor design that delivered greater torque and more precise operation have brought electric valve actuators into a prominent market position.

Electric actuators are compact and comparatively self contained, requiring only cable connections and none of the additional devices sometimes needed for a pneumatic installation. There are some points of advantage to consider with electric actuators. Rotork introduced their CVA line of electric actuators almost ten years ago, making it something of a mature product now. Here are some advantageous points about the CVA actuators that likely apply generically as well.

• Setup is accomplished with a Bluetooth enabled device which provides quick calibration of open and closed positions, as well as establishment of valve setup parameters.
• A separately sealed electrical connection compartment keeps motor and mechanical compartment isolated from the environment while electrical connection section cover is removed.
• An on board datalogger records thrust and position data over time for use in asset management and service functions. Data can be downloaded by Bluetooth or transmitted by common protocol to another station.
• Change in setpoint produces a rapid and precise change in valve position with high resolution accuracy and repeatability.
• Actuator can be programmed to move to a preset condition in the event of a loss of electric power. The energy to achieve the failsafe position is stored in the actuator.
• Force balance positioning used in pneumatic valves, with spring force vs. air pressure, has resilience that can result in a change in position of the valve trim in response to a bump in system pressure. Resistance from the gear train on electric drives prevents this movement.
• Static friction of the valve packing and other parts increases the amount of force to intially get the valve moving toward a new position. The additional time required to build air pressure and force to overcome static friction results in delayed valve response, then overshoot of the new setpoint. A combination of a sensor system and the mechanical drive section of an electric actuator eliminates overshoot and delayed response.

Electric actuators can be had in quarter turn and linear versions, with torque ranges suitable for a broad range of process control applications. The datasheet below, from Rotork, provides useful illustrations of the actuator interior, along with additional detail about electric actuators. Share your process control valve requirements and challenges with product application specialists, combining your own process knowledge and experience with their product application expertise to develop the best solutions.

Electric Control Valve Actuators for Industrial Process Applications from CTi Controltech

General Purpose Valve for Targeted Applications

Industrial Butterfly Valve
Courtesy Adams Valves, Inc.

This is the Adams Valve WEK series industrial butterfly valve. It is a general purpose valve for many applications involving fresh water, seawater, sewage, hydrocarbon and wet gas.

The WEK valves feature low operating torque, compact design, low weight, and good control characteristics. The sealing system is completely integrated within the body of the valve, utilizing a laminated metal and graphite material. Available sizes range from 3" to 24".

Streamlining promotes smooth movement of the disc through its full travel range, without flutter induced by the flow moving around the disc. Sealing is accomplished when the disc rotates to the closed position and seals tightly against the seat which is incorporated into the body. Tight shut off results from the disc pushing into the seal. Valve operation can be manual, via a handwheel, or automated with a range of electric, hydraulic, or pneumatic actuators.

Share your fluid control, valve, and automation challenges with the engineers at CTI Controltech, combining your process and facility knowledge with their product and application expertise to develop the most effective solutions.

Electro-hydraulic Valve Actuators Applied at Tank Farm

Electro-hydraulic valve actuators
Rotork Skilmatic

Rotork is a global leader in the design and manufacture of valve and damper actuators for industrial applications. The company's Skilmatic line of electro-hydraulic actuators is designed to provide a solution for modulating control and electric failsafe operation in rotary and linear designs. The company has created an animated video illustrating how the actuators can be deployed on control valves in a tank storage application. The presentation provides good detail of the inner workings of the actuator, along with the actuator control unit display. The video is short, but very informative.

Share your valve and automation requirements and challenges with application experts. A combination of your process and facility knowledge and their product application expertise will produce effective solutions.

Type K Vane Actuator Provides Long Term Solution for Tough Power Plant Application

Rotork K-TORK vane type valve actuators on

bottom ash spray valve control.

Rotork K-TORK vane type valve actuator has solved a difficult flow control application found in many coal-fired power plants – high-pressure bottom ash spray valve control.

High-pressure spray water is used to sluice bottom ash and pyrites from the boiler hopper bottoms and to carry the ash out of the plant. The valves used are typically ANSI Class 300 double-offset high-performance butterfly designs ranging in size from 3” to 12”, automated with double-acting actuators. They cycle from four to ten times per day and discharge to atmospheric pressure, creating a very high pressure drop. The flow media is re-circulated ash water that is abrasive and flows at pressures between 400 and 500 psi.

In many power plants around the world, K-TORK actuators have provided over 10 years of maintenance-free service whilst preserving the life of the valves and valve seats in this arduous duty.

Among the challenges, it is imperative that the valves close fully and with zero leakage in a high pressure drop state. If the valve disc moves even slightly from the seat, the abrasive, high-pressure water will “wire-draw” or cut the butterfly valve seat. Traditionally, rack-and-pinion or scotch-yoke actuators have been used in this application, but “slop” or hysteresis in the rotary-to-linear conversion allows for the pressure in the pipe to move the disc from the seat, often causing premature failure of the valve after a period of only three to twelve months.

The problem becomes more acute when multiple valves are leaking, lowering the available back-pressure at the header, which makes it difficult or impossible to move the ash from the boiler.

When assembled to the valve with a ‘No-Play’ coupling, the K-TORK actuator has zero lost motion, “slop” or hysteresis. The one-piece vane and drive shaft cannot be back-driven and will hold the disc of the valve firmly in place.

Additional challenges include the location of the valves on a manifold at the bottom of the boiler where space is critical and plant air can be poor quality. K-TORK provides a high torque-to-size ratio and the double-opposed lip seal design is forgiving to dirty or contaminated air.

Also, the low-friction performance of K-TORK provides a speed-controlled, smooth valve operation, eliminating the risk of water hammer created by the high pressure drop.

Finally, longer run time between shutdowns demands increased reliability from the equipment in these critical applications. In particular, as the number of plant maintenance personnel has decreased, actuators that reduce maintenance (seal replacement) time and work orders have a direct payback to the owner, especially when valve life can be significantly increased through improved actuator performance.

Share your fluid control and valve actuation challenges with a specialist, combining your process knowledge and experience with their product application expertise to develop effective solutions.

Rotork Wireless Valve Monitoring

Wireless valve monitoring system
Courtesy Rotork

Rotork, a global leader in valve automation, has introduced a new wireless valve position monitoring system that transmits real-time valve position indication to a central control location. The RI Wireless product line is certified Zone 1 Intrinsically Safe and intended for application in new and existing facilities in process industries and utilities.

In operation, each valve will have a Valve Monitoring Device (VMD) installed on the existing or new actuator using industry standard interfaces. The VMD gathers data from the actuator and transmits it across a network established using other routing hardware that is part of the total system. A software package provides the final connection to a receiving monitor or controller using industry standard connections.

There is more to be learned about the operation and benefits of the wireless valve monitoring system. The document included below provides description of the various devices that comprise the complete system, as well as the benefits that can be derived from its deployment. Reach out to a valve automation specialist and share your requirements and challenges. Combining your process knowledge with their product application expertise will produce effective solutions.

Wireless Valve Monitoring System From Rotork from CTi Controltech

Trunion Mount Ball Valves in Double Block and Bleed Assembly

Double block and bleed valve assembly
Valbart - Flowserve

The nature of some processes, as well as applicable industry standards, can call for a specific valve arrangement that provides isolation of a piping section with a safety factor not inherent in a standard stop valve.

Combined into a single compact unit, a double block and bleed valve consists of two trunnion mounted ball valves and a third smaller valve. While it is possible to employ other valve types in place of the ball valves, the trunnion mounted ball valve is well suited for the heavy duty applications involved in the oil and gas industry.

Each of the ball valves serve to block the process flow and the third valve serves as the bleed or drain valve for the space between the two block valves. Combining both ball valves into a single unit reduces leakage paths, weight, and installation complexity.

In addition to serving as a positive isolation valve set, a double block and bleed is also applied in meter calibration. Calibration of the meters used for custody transfer must be accomplished with a confirmed zero flow rate. Any valve leakage has the potential to impart an offset of the zero value on the meter, resulting in continuously incorrect readings. Closing off the flow with a double block and bleed valve, draining the inter-valve space with the bleed valve, then monitoring the bleed port for any continued flow can confirm zero flow in the metered line.

Share your process piping and fluid control challenges with an application specialist, combining your process knowledge with their product application expertise for the most effective solutions.

Trunnion Mount Ball Valve Double Block and Bleed Assembly from CTi Controltech

Electric Valve Actuator - Inner Workings

IQ3 Electric Actuator
Rotork

Rotork's IQ3 electric actuator is one of the most advanced and full featured valve actuators available today. The IQ3 incorporates many innovative features which expand its functionality, making it an advantageous choice for many industrial applications. In just the latest generation, a number of new features have been incorporated (from Rotork website).

• New intuitive user interface
• Advanced dual stacked display with configurable datalogger functionality
• Toughened glass screen plus optional environmental shield
• Setting tool with secured Bluetooth® connection
• High reliability, solid-state controls (multi-turn variants)
• Reduced internal wiring and connections
• Simplified torque sensor (multi-turn variants)
• Simple and robust absolute position sensor with high reliability and accuracy
• New thrust base design (multi-turn variants)
• Separable gearbox/thrust base across the range (multi-turn variants)
• Advanced real-time status reporting

The video below provides a display of the parts assembly of an IQ3 actuator. The mechanically inclined should find it interesting. You can get more detail on the IQ3 series of actuators for every application from a product specialist. Share your valve and actuator challenges with experts and get the best available solutions.

Power Source for Hydraulic Valves and Dampers

Self contained hydraulic power unit
Rotork

A range of fluid processing and other flow control operations employ hydraulically actuated valves or dampers. Hydraulic actuators use a pressurized incompressible liquid as the motive force to drive the actuator mechanism. They are generally capable of operating large loads at higher speeds than electric actuators, and a smaller size than similarly capable pneumatic actuators. They are not subject to limited run times, power loss, or air line freezing.

A power unit is required to provide adequate hydraulic fluid and pressure for each application. A single unit can service more than one actuator or damper.

Rotork, a globally recognized manufacturer of valve actuators, also provides self contained hydraulic power units specifically tailored to applications involving valve and damper actuators. With fluid capacities up to 7,500 liters (2,000 gallons) and operating pressures up to 345 bar (5,000 psi), the skid mounted units are suitable for a wide range of applications. Each system is customized to accommodate the requirements of the intended application.

Share your fluid control and valve actuation challenges with product specialists, combining your process and project knowledge with their product application expertise for effective solutions.

Rotork Fluid Systems Hydraulic Unit from CTi Controltech

Lined Ball Valves Provide Corrosion Protection Without Exotic Alloys

Cutaway view of lined ball valve
Flowserve Atomac

Ball valves are a staple of fluid process control, delivering a host of design and performance attributes making them the valve of choice for many applications. When the process involves corrosive fluids, steps must be taken to accommodate the aggressive nature of the media, so that valve trim and body are not prematurely degraded by the intended use.

A good solution for valves exposed to aggressive media is an interior lining of fluoropolymer or other material resistant to the corrosive effect of the fluid. Employing a lining protects the valve metal parts from contact with the fluid, allowing the use of less expensive metals in the construction of valve body and other valve components. In extreme cases, ball valves can be delivered with fluid paths fabricated of ceramic material for superior corrosion and erosion resistance.

Flowserve Atomac is a globally recognized leader in the manufacture of lined ball valves, as well as lined strainers, sight glasses, sampling valves, and check valves. Lined ball valves are available in essentially all the configurations expected of more conventional ball valves, including diverter and control service versions.

An overview of the Atomac line is included below. Share your corrosive fluid processing challenges with a product specialist, combining your process expertise with their product application knowledge to deliver effective solutions.

Lined Ball Valves Provide Corrosion Protection from CTi Controltech

Specialized Valve Trim Controls Flow and Pressure Drop

Fluid process control operations can entail fluid velocities, pressures, or other characteristics that can prove challenging on a number of levels, not the least of which is flow control. Valve manufacturers have developed a wide array of specialized designs and configurations to provide flow control while mitigating or eliminating some undesirable effects associated with restricting fluid flow.

Inherent in the restriction of flow is the possibility of creating or increasing some generally undesirable conditions in the pipe.

• Velocity
• Noise
• Vibration
• Erosion
• Cavitation

Depending upon the process conditions, any of these elements could have a decidedly negative impact upon process performance, workplace environment, or system longevity. The video provides an example of how one manufacturer of severe service ball valves, Mogas, modifies their design to address these potentially negative aspects while providing accurate flow control. By adding elements to the outlet side of a ball valve, an entirely different operating profile is achieved. Watch the video for all the details, as it is well produced and illustrated.

Share your fluid process control challenges with experienced application specialists. Combine your process expertise with their product application knowledge to produce effective solutions.

Valve Actuator Video - Rotork IQ3 Absolute Encoder and Battery

One of several variants of the IQ3 Actuator
Courtesy Rotork

Industrial valve actuators are available in an uncountable range of types, styles, power ranges, and feature sets to meet the needs of industrial processes everywhere. Some applications have a requirement for the control and decision making equipment or personnel to know the valve position at all times, including when operating power may be interrupted. This scenario calls for an absolute encoder with a battery backup.

An absolute encoder assigns a unique identifier to every possible shaft position, so any reading of the encoder value will indicate the current shaft position. These devices have historically been rather complex, but Rotork has developed a radically simplified approach that provides good operability while extending the useful life of the mechanism.

The short video below illustrates the primary features of the system. More information is available from product application specialists. Share your valve actuation challenges with them, combining your process expertise with their product knowledge for the best process control solutions.