New Product Alert: The Jordan Valve Mark 75A

Jordan Valve Introduces the Mark 75A Wafer Style Control Valve

Jordan Valve designed the Mark 75A as the next generation of control valves with its modular, stackable actuator. The Mark 75A incorporates a modular, stackable actuator to reduce weight and footprint dimensions further while providing additional torque and all of the benefits of the time-tested Sliding Gate seat design in a lightweight, compact body. The Mark 75A, which is available in 1" through 6" (DN25 - DN150") sizes, is a high-value solution used in a variety of applications.

DOWNLOAD THE MARK 75A DATA SHEET HERE

Mark 75A Advantage: An Actuator with Modularity and Stackability 

The new actuator design has an effective diaphragm area of 25 square inches per module and can be stacked to increase the total effective area to 50 or 75 square inches. The use of aluminum in the construction ensures a lightweight automated package.

Mark 75A Advantage: Less Weight 

The Mark 75A has a significant weight advantage over other valve designs. A 4" Mark 75A with a 75M actuator weighs 27 lbs. Because of the lightweight and reduced envelope dimensions, transportation, installation, and support costs are lower.

For more information about the Mark 75A in Wisconsin, Indiana, Minnesota, South Dakota and North Dakota, contact Swanson Flo. Call them at 800-288-7926 or visit https://swansonflo.com.

O-Ring Style Stem Seal Sanitary Process Control Valves for Cosmetic, Dairy and Food and Beverage Industries

The Steriflow FBCV O-Ring Series meets the rigid specifications for sanitary process control valves for customers who prefer an O-ring style stem seal. This valve series is suitable for various cosmetic, dairy, and food and beverage industries. Conforming to 3A guidelines, the FBCV is ideal for a wide range of flowing media in sanitary systems' utility and process areas.

The FBCV-OR's high rangeability, characterized trim, high capacities, superior temperature and pressure ratings, and a selection of sealing methods make the sanitary control valve ideal for liquid, gas, and steam services. Whether the need is to control pressure, temperature, flow, pH, or another variable, the FBCV is the correct valve for your process.

For more information, contact Swansonflo. Call 800-288-7926 or visit https://swansonflo.com.

Flowserve Valtek FlowTop GS General Service Globe Control Valve

Designed from the ground up, the Flowserve Valtek FlowTop GS has achieved optimum performance at the minimum total cost with easy and quick maintenance. Available in globe style design with interval flanges designed to B1634, it is available in sizes from 1/2 inch to 6-inch class 150 to 300 with a diaphragm actuator. The positioner can be mounted directly to the valve. 

Flowserve Valtek FlowTop GS design features include:

• PTFE packing as standard with optional PTFE live loaded to ISO 15848-1. 
• A robust bonnet design.
• Seat retainer clamps and the seat ring with no threads for easy removal.
• Standard shutoff that's better than class 4, and no lapping required.
• Zero leakage between the seat and body for less maintenance.
• A stainless steel packing follower.
• Stable post guiding for no galling in the flow area.
• Precisely machined contours on the plug head, providing optional reduced trims. 
• Excellent flow characteristics and a high flow globe valve body.

For more information, call Swanson Flo now at 800-288-7926 or visit their website at https://swansonflo.com.

Advanced Sliding Gate Design: The Heart of Jordan Regulators and Control Valves

The Jordan Valve Sliding Gate Seat is a true value-added alternative to conventional trim designs.  Here's why:

Easy Maintenance

Sliding Gate Seats only have one moving component. The seats are not pressed or screwed, making removal simple. Cv values are interchangeable. Valve action is easily changed. 

Seat Materials

Jorcote is tougher than stainless steel, offering excellent wear, corrosion, and galling resistance. It has lower friction coefficient than Teflon, providing higher pressure drop capability and less offset. Jorcote seats handle temperatures from sub-zero to 550 ° F (288 ° C). Seats were tested to 1,000,000 full stroke cycles in 70 psi steam, maintaining ANSI Class IV leakage while exhibiting negligible wear. 

Constant Seat Contact

Disc and plate are in constant contact. Therefore, there is no 'chatter' inside the valve, less mechanical wear and greater stability at the stroke's low end. Constant touch results in self-lapping and self-cleaning.

Straight Thru Flow

The control element is perpendicular to flow, resulting in lower turbulence and greater trim life. 

Short Stroke

In regulators, this results in faster response to input signals, less droop (greater accuracy), and longer diaphragm life. In control valves, the gate seat's short stroke results in less packing wear. Smaller actuators may also be used, resulting in lighter weight, smaller envelope dimensions and less air consumption. 

Multiple Orifice Layout

The sliding gate seat's multiple orifice dissipates wear from downstream flow, resulting in longer trim life and quiet activity. 

Disc plate overlap

Disc and plate overlap 1/32 "(0,8 mm) around each tube. This creates an area of closure, not line of closure, resulting in better shutoff for a longer period of time, reducing waste and lowering costs.

For more information on Jordan Regulators and Control Valves, contact Swanson Flo. Call them at 800-288-7926 or visit their website at https://swansonflo.com.

Severe Service Valve Parts, Repair, Replacement & Upgrades

Swanson Flo is pleased to partner with Megawatt Machine Services (MMS). MMS has developed industry leading expertise in severe-service control valve repair and replacement parts. Their state-of-the-art capabilities can meet your needs for replacement trim and valve repair on all brands of AOV and MOV valves including:

• Valtek®
• Fisher®
• CCI-Drag®
• BTG/Sulzer
• Copes-Vulcan®
• Masoneilan®
• Yarway®
• Pacific®
• Edwards®
• Siemens® - Westinghouse®
• WEIR/Atwood-Morrill®
• GE®
• Velan®
• ABB/Alstom®
• Toshiba®
• Anchor-Darling®

MMS can also reverse engineer and manufacture trim parts and rebuild valves when the OEM is no longer in business or parts are obsolete.

For more information  on replacement valve parts, valve repairs, or trim upgrades contact Swanson Flo. Call them at call 800-288-7926 or visit them at https://swansonflo.com.

Changing VR Actuator Orientation on Valtek Rotary Valves, including Valdisk, Shearstream and MaxFlo

The Valtek VR rotary cylinder actuator is a high pressure, compact actuator with high torque and pneumatic stiffness for excellent throttling capabilities. The standard splined shaft connection eliminates backlash for precise control. This video shows how to change the orientation on a Valtek Rotary Valves including Valdisk, Shearstream and MaxFlo products.

For more infomration on Valtek Control Valves, contact Swanson Flo by calling 800-288-7926 or by visiting https://swansonflo.com.

The Valtek® Mark Eight™ Y-Pattern Control Valve

The Valtek Mark Eight Control Valve Features
(Click for larger view)

The Valtek® Mark Eight™ control valve is designed with a unique “Y” style globe body that provides higher flow capacities and less process turbulence than conventional globe valves.

Because of its nearly straight-through flow passage, the “Y” style body is less flow restrictive than a normal globe-style body. This permits less pressure to be converted into velocity as the fluid passes through the seat, resulting in a lower valve recovery factor and higher capacity.

Mark Eight’s straight-through design generates less valve and piping turbulence which significantly reduces harmful noise and vibration levels.

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DOWNLOAD THE VALTEK MARK EIGHT TECHNICAL BROCHURE FROM THE SWANSON FLO SITE

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Flowserve Valtek Control Valve Packing Adjustments

Flowserve Valtek offers packing in many different types, styles, and materials for a wide range of applications. One thing they all have in common is that they require periodic adjustment to ensure optimal performance. Adjusting packing is a necessary and important valve maintenance practice. Neglecting packing can lead to a leak path formation that may be impossible to repair without packing replacement. Packing leaks should be addressed as soon as possible to ensure safety and optimal reliability. This video demonstrates basic packing adjustments and procedures.

For more information about Flowserve Valtek valves, contact Swanson Flo by calling 800-288-7926 or by visiting https://swansonflo.com.

The Flowserve Valtek MaxFlo 4 Eccentric Rotary Plug Control Valve

The Flowserve Valtek MaxFlo 4 control valve is a high performance eccentric rotary plug valve designed for the process industry. It features a large capacity, standard hardened trim and superior shaft blow-out protection. This valve is available in sizes 1 through 12 inches, ASME Class 150, 300 and 600 as well as DIN PN 10, PN16, PN 25, PN40 and PN63.

An optional ISA 75.08.01 or DIN EN 558 series 1 long-pattern body makes this valve an easy drop-in replacement for a globe control valve.

Get the Valtek MaxFlo 4 Control Valve Brochure Here

Changing the Trim on the Jordan / LowFlow Mark 708 Series Control Valve

The LowFlow Mark 708 is a very popular and accurate control available for fractional flow services: whether for pilot plant installations, test stands, R & D facilities or for specialized processes such as dosing, injection and venting applications. This video demonstrates how to change the trim on the Jordan / LowFlow Mark 708 Series Control Valve.

Swanson Flo
https://swansonflo.com
800-288-7926

Mounting the Logix 3800 Digital Positioner on the Valtek Mark One Linear Control Valve

Compatible with linear and rotary valves and actuators, the Logix 3800 digital positioner offers industry-leading embedded measurement, data reduction and diagnostic functionalities. It  features powerful diagnostics that identify field problems and expedite corrective actions to ensure reduced return-to-operation times.

The Valtek Mark One globe control valve offers superior performance in liquid and gaseous services, while also permitting easy, fast and inexpensive maintenance.

This video details how to mount the Logix 3800 positioner on the Mark One valve.

For more information about Flowserve valve and valve automation products, contact Swanson Flo by calling 800-288-7926 or visit their website at https://swansonflo.com.

The Basics of Control Valve Actuators

Control Valve
(Flowserve Valtek)

Understanding control valve operation is very important to for anyone considering a career in process engineering, in plant maintenance, or process design engineering.

Control valve actuators control fluid in a pipe by varying the orifice size through which the fluid flows. Control valves contain two major components: the valve body and the valve actuator. The valve body provides the fluid connections and a movable restrictor comprised of a valve stem and plug that is in contact with the fluid that varies the flow. The valve actuator is the component that physically moves the restrictor to vary the fluid flow.

The video below introduces the viewer to basic control valve operation concepts and the basic types of actuators.

A Peek Inside a Valtek Mark One Control Valve with Piston Actuator

The video below provides a look inside the Flowserve Valtek Mark One control valve and identifies its major components.

The Flowserve Valtek® Mark One globe control valve is designed for liquid and gaseous services, and for permitting easy, fast and inexpensive maintenance.

The spring-cylinder actuated Mark One valve provides stiffness and maintains high positioning accuracy, repeatability, controlled high speed, and faithful response. The Mark One valve handles up to 150 psig supply air and has the thrust to shut off against much higher fluid pressures.

The Mark One valve is designed so the spring, supply air pressure and fluid pressure itself combine to produce exceptionally tight shutoff. A self-aligning seat ring further enhances the shutoff capability of the valve.

https://swansonflo.com
800-288-7926

Flowserve Control Valve Product Guide (Valtek, Kammer)

Flowserve Control Valve

Flowserve general service control valves combine platform standardization, high performance, and simplified maintenance to deliver a lower total cost of ownership.

Flowserve delivers a broad range of general service control valves – linear and rotary – with pressure ratings of ANSI Class 150 to 4500/PN 10 to PN 640. These high-performance control valves offer greater reliability, precision control, and flow capacity, with significantly reduced cavitation, flashing, and noise. Quality production ensures increased process yield and throughput.

Because Flowserve general service control valves are constructed on global platforms using standardized parts and components, up-front engineering is held to a minimum. Simplified operation, maintenance, and service further ensure lower total cost of ownership.

Download your own copy of the Flowserve Control Valve Product Guide here or browse through the embedded document below.

Flowserve Control Valve Product Guide (Valtek, Kammer) from Swanson Flo

Disassembly, Repair, and Rebuild of the Jordan Mark 78 Control Valve

The Jordan Mark 78 pneumatic control valve is designed for accurate performance and simplified maintenance. This versatile product can be used on a variety of applications, including viscous/corrosive liquids, process gases or steam in process or utility service.

• Shutoff: ANSI Class IV or VI
• Sizes: 1/2" – 2" (DN15 – DN50)
• End Connections: Threaded, Flanged, Socket Weld, Butt-Weld
• Body Materials: Bronze, Carbon Steel, Stainless Steel
• Cv (Kv): up to 50 (up to 43)
• Trim Materials: Stainless Steel, Monel, Hastelloy C, Alloy 20
• Seat: ANSI Class IV (Hard Seat); ANSI Class VI Teflon (Soft Seat)
• Control Ranges: 3-15 psi, 6-30 psi or split ranges (0,2-1,0 bar, 0,4-2,1 bar)

The video below provides a detailed demonstration of how to disassemble, repair, and rebuild the Mark 78 control valve.

https://swansonflo.com

800-288-7926 

Flowserve Valtek MaxFlo 4 Eccentric Rotary Plug Control Valve

The Flowserve Valtek MaxFlo 4 control valve is a high performance eccentric rotary plug valve designed for the process industry. It features a large capacity, standard hardened trim and superior shaft blow-out protection.

This valve is available in sizes 1 through 12 inches, ASME Class 150, 300 and 600 as well as DIN PN 10, PN16, PN 25, PN40 and PN63. An optional ISA 75.08.01 or DIN EN 558 series 1 long-pattern body makes this valve an easy drop-in replacement for a globe control valve. 

Founded in 1960, Swanson Flo has long maintained our position as an industry leader in process automation with unmatched project success leveraging industry preferred products and services. 

https://www.swansonflo.com 

800-288-7926

Visual Demonstration of Cavitation and its Adverse Effects on Control Valves and Pumps

Fluid passing through a control valve experiences changes in velocity as it enters the narrow constriction of the valve trim (increasing velocity) then enters the widening area of the valve body downstream of the trim (decreasing velocity). These changes in velocity result in the fluid molecules’ kinetic energies changing as well. In order that energy be conserved in a moving fluid stream, any increase in kinetic energy due to increased velocity must be accompanied by a complementary decrease in potential energy, usually in the form of fluid pressure. This means the fluid’s pressure will fall at the point of maximum constriction in the valve (the vena contracta, at the point where the trim throttles the flow) and rise again (or recover) downstream of the trim:

If fluid being throttled is a liquid, and the pressure at the vena contracta is less than the vapor pressure of that liquid at the flowing temperature, the liquid will spontaneously boil. This is the phenomenon of flashing. If, however, the pressure recovers to a point greater than the vapor pressure of the liquid, the vapor will re-condense back into liquid again. This is called cavitation.

As destructive as flashing is to a control valve, cavitation is worse. When vapor bubbles re-condense into liquid they often do so asymmetrically, one side of the bubble collapsing before the rest of the bubble. This has the effect of translating the kinetic energy of the bubble’s collapse into a high-speed “jet” of liquid in the direction of the asymmetrical collapse. These liquid “microjets” have been experimentally measured at speeds up to 100 meters per second (over 320 feet per second). What is more, the pressure applied to the surface of control valve components in the path of these microjets is intense. Each microjet strikes the valve component surface over a very small surface area, resulting in a very high pressure (P = F/A ) applied to that small area. Pressure estimates as high as 1500 newtons per square millimeter (1.5 giga-pascals, or about 220000 PSI!) have been calculated for cavitating control valve applications involving water.

New Product Alert: The Jordan Mark 75PTP Sliding Gate Control Valve

Jordan Mark 75PTP

The Jordan Mark 75PTP is a Mark 75 wafer style control valve with an 80mm (1" - 2") Stainless Steel Piston Actuator. The Gemu cPOS Smart Positioner is standard and required for control applications. For on/off service, the valve may supplied without a positioner. JVCV Should be used for sizing selection.

The Mark 75PTP provides great capacity in a com-pact wafer style body. A 2" Mark 75PTP provides 72 Cv (62 Kv). (Refer to Cv Capacity Charts for information concerning all line sizes).

The Mark 75PTP features a 'T' slot design connection to the disc. This connection allows for quick and easy reversing of functions. Instead of having to go into the actuator to change action, all that is needed in a Mark 75PTP is to rotate the seats 180°. With this simple rotation, the valve can go from reverse acting to direct acting (or vice versa).The stroke length of the Mark 75PTP is a slightly longer stroke than standard sliding gate valves. This longer stroke enables better turndown. Combined with the capacity of the Mark 75PTP, the in-creased turndown makes for a great control valve.

Jordan MK75PTP Sliding Gate Control Valve from Swanson Flo

Understanding Linear, Equal Percentage, and Quick Open Control Valve Flow Curves

Flowserve Valtek Control Valve

Flow characteristics, the relationship between flow coefficient and valve stroke, has been a subject of considerable debate. Many valve types, such as butterfly, eccentric disk and ball valves, have an inherent characteristic which cannot be changed (except with characterizable positioner cams). Flow characteristics of globe valves can be determined by the shape of the plug head.

The three most common types of flow characteristics are quick opening, equal percentage and linear. The figure below shows the ideal characteristic curve for each. These characteristics can be approximated by contouring the plug. However, inasmuch as there are body effects and other uncontrollable factors, plus the need for maximizing the flow capacity for a particular valve, the real curves often deviate considerably from these ideals. When a constant pressure drop is maintained across the valve, the characteristic of the valve alone controls the flow; this characteristic is referred to as the “inherent flow characteristic.” “Installed characteristics” include both the valve and pipeline effects. The difference can best be understood by examining an entire system.

Equal Percentage

Control valve flow curves.

Equal percentage is the characteristic most commonly used in process control. The change in flow per unit of valve stroke is directly proportional to the flow occurring just before the change is made. While the flow characteristic of the valve itself may be equal percentage, most control loops will produce an installed characteristic approaching linear when the overall system pressure drop is large relative to that across the valve.

Linear

An inherently linear characteristic produces equal changes in flow per unit of valve stroke regardless of plug position. Linear plugs are used on those systems where the valve pressure drop is a major portion of the total system pressure drop.

Quick Open

Quick open plugs are used for on-off applications designed to produce maximum flow quickly.

This information provided courtesy of Flowserve Valtek. Share your control valve requirements and challenges with a valve specialist, combining your own process knowledge and experience with their product application expertise to develop effective solutions.

8 Critical Control Valve Selection Criteria

Control Valve (Valtek)

Choosing an improperly applied sized or improperly sized control valve can have serious consequences on operation, productivity and most important, safety. Here is a quick checklist of basics that need to be considered:

1. Control valves are not intended to be a an isolation valve and should not be used for isolating a process. 
2. Always carefully select the correct materials of construction. Take into consideration the parts of the valve that comes in to contact with the process media such as the valve body, the seat and any other "wetted" parts. Consider the operating pressure and operating temperature the control valve will see. Finally, also consider the ambient atmosphere and any corrosives that can occur and effect the exterior of the valve. 
3. Put your flow sensor upstream of the control valve. Locating the flow sensor downstream of the control valve exposes it to an unstable flow stream which is caused by turbulent flow in the valve cavity.
4. Factor in the degree of control you need and make sure your valve is mechanically capable. Too much dead-band leads to hunting and poor control. Dead-band is roughly defined as the amount of control signal required to affect a change in valve position. It is caused by worn, or loosely fitted mechanical linkages, or as a function of the controller setting. It can also be effected by the tolerances from mechanical sensors, friction inherent in the the valve stems and seats, or from an undersized actuator. 
5. Consider stiction. The tendency for valves that have had very limited travel, or that haven't moved at all, to "stick" is referred to as stiction. It typically is caused by the valves packing glands, seats or the pressure exerted against the disk. To overcome stiction, additional force needs to be applied by the actuator, which can lead to overshoot and poor control.
6. Tune your loop controller properly. A poorly tuned controller causes overshoot, undershoot and hunting. Make sure your proportional, integral, and derivative values are set). This is quite easy today using controllers with advanced, precise auto-tuning features that replaced the old fashioned trial and error loop tuning method.
7. Don't over-size your control valve. Control valves are frequently sized larger than needed for

   

   Control Valve
   Specialized for Food/Bev
   Pharmaceutical (Kammer)

   the flow loop they control. If the control valve is too large, only a small percentage of travel is used (because a small change in valve position has a large effect on flow), which in turn makes the valve hunt. This causes excessive wear. Try to always size a control valve at about 70%-90% of travel.
8. Think about the type of control valve you are using and its inherent flow characteristic. Different types of valve, and their disks, have very different flow characteristics (or profiles). The flow characteristic can be generally thought of as the change in rate of flow in relationship to a change in valve position. Globe control valves have linear characteristics which are preferred, while butterfly and gate valves have very non-linear flow characteristics, which can cause control problems. In order to create a linear flow characteristic through a non-linear control valve, manufacturers add specially designed disks or flow orifices which create a desired flow profile.

These are just a few of the more significant criteria to consider when electing a control valve. You should always discuss your application with an experienced application expert before making your final selection.