Piping Specialties Inc. (PSI) is one of the northeast's largest suppliers of valves; process controls/instrumentation, and engineered mechanical specialties. Industries served: Power Generation, Pulp/Paper, HVAC, Water/Wastewater, Food/Beverage, Life Sciences, Chemical/ Process, Semiconductor.
For more information visit PSI-Team.com or call 800-223-1468.
ARCA Flow Control is a global control valve manufacturer that serves the chemical, petrochemical, power, food and beverage, and other industrial markets. Their valve offering includes nominal diameters up to 32" rated to ANSI 2500 class for high-pressure applications, and temperatures ranging from cryogenic to 1100° F are manufactured and supplied by nine plants worldwide. A high degree of vertical integration makes the manufacturing process flexible and ensures a high capacity for delivery.
A-T Controls / Triac "V" Series Ball Valves are ideal for achieving more precise control while maintaining simplicity and sealing features. A-T Controls offers 1/2" – 4" 3-piece and 1/2" – 6" flanged sizes. Standard "V" notch angles are 30°, 60°, and 90°. While manual valves are available, A-T Controls specializes in automating them to meet your specific control needs.
V-port valves provide more accurate and consistent control than traditional round ported ball valves. A-T Controls manufactures "V" port valves with the control port cast and machined into the ball rather than the seat, resulting in significantly improved flow characteristics and the elimination of the need to replace seats. The 30° option provides finer tapered control throughout the valve rotation, while the 60° and 90° options offer a higher Cv as well as controlled flow.
The V7 valves come standard with a PTFE seat, while the V8, V9, and FVD9 V-port valves come standard with a 50/50 STFE seat. The 50/50 SST powder/PTFE blend provides both strength and superior sealing properties.
For more information, contact Piping Specialties, Inc / PSI Controls. Call them at 800-223-1468 of visit their website at https://psi-team.com.
Valve positioners control a valve's position (ball, butterfly, and globe) such that a given process will achieve specific desired flow parameters. They perform this by determining the error between the optimum valve position and actual valve position. With specialized sensors mounted on the valve stem or actuator shaft, these sensors compare the magnitude of error between the setpoint from the control system and the actual process value. The positioner's corrective output is sent electrically or pneumatically to a valve actuator, which moves the valve in the corrective direction.
As a control valve accessory and the interface between the control system and valves, positioners play a vital role in ensuring the process loop's performance. The valve positioner adjusts the valves' opening, thereby varying the valve's flow rates, from completely shut or wide open to anywhere in between. An example of this type of positioning control will include mixing hot and cold water to achieve a specified downstream temperature requirement. By controlling the valve's opening and closing, process control parameters such as flow, pressure, level, and temperature are maintained
ARCA develops, manufactures, and markets control valves on an international scale primarily for the chemical, food, power, and oil and natural gas industries.
High-performance control valves from ARCA are capable companions in industrial and large-scale power plants by ensuring safe and reliable operation and can be used in all high and low-pressure steam, oil, gas, water/boiler feedwater, and condensate circuits.
Oil and natural gas are the primary sources of energy driving the global economy. ARCA valves have helped ensure production and process reliability in the oil and natural gas industries for many years, and a wide variety of precision-engineered control valves are available that include DN15 (1/2) to DN600 (24") and PN16 to PN400 (ANSI 150-2500) sizes as well as special-purpose valves for all media handled in these areas.
ARCA valves are also indispensable in steel production. Steel production and processing require valves that offer ultra-high performance and a long service life.
Integrated in the bypass section of turbo-compressors, ARCA valves reliably carry out multiple tasks simultaneously by assisting during the start-up and shut-down phases of the compressor.
Concentrated Solar Power plants convert solar radiation into electrical energy. Systems that use thermal oils as a heat-transfer medium produce temperatures that can reach 400 °C at approximately 40 bar in the solar array. Such applications integrate reliable ECOTROL® 6H high-pressure valves, which feature a bellows seal.
The BIOVENT® control valve developed for the food and pharmaceutical industry, for example, is available in many designs and connection layouts and with drives and positioners in stainless steel to cater to all applications.
Understanding industrial control valve design and operation is very important if you work as a process engineer, a plant maintenance person, or if you design process control loops.
Control valves are used extensively in power plants, pulp and paper mills, chemical manufacturing, petro-chemical processing, HVAC and steam distribution systems.
There are many types, manufacturers, body styles, and specialized features, but the they all share some basics operating principles. The video below explains components, operation, and fundamentals.
Process plants have increased throughput causing operating pressures and flow rates to increase as well. Advanced production techniques demand better equipment and valve performance to handle these severe conditions. FlexStream rotary control technology is designed specifically for severe service conditions, to provide superior velocity control, variable characterization, exceptionally high rangeability, and precision modulation.
1) Diffusion element splits and aligns the flow. 2) The control element reduces the flow velocity.
Within a compact replaceable trim design, located downstream with a seat, FlexStream technology employs flow paths of different configurations to control flow and pressure drop. First the diffusion element splits and aligns the flow, then the control element reduces the flow velocity through a variable arrangement of torturous flow path. This allows precise pressure let down, and velocity control custom tailored to process conditions. These torturous flow paths consist of a series of right angle turns. Pressure is reduced by directing fluid flow through these right angles, which control kinetic energy and velocity. Pressure drop at each stage is evenly distributed, while the torturous path expands at each right angle to ensure velocities will not be increased. The larger the pressure drop, the more turns are required to control velocity.
For applications requiring high rangeability, ideal flow control is available by varying the combination of control area and open area, within the trim. The control area determines the amount of bore filled with multi-stage paths, and is used for higher pressure drop lower flow conditions. The open area determines the amount of unrestricted flow, and is used for lower pressure, drop higher flow conditions. This custom fill characterization can vary from 30 to 100 percent, depending on flow conditions, pressure drop, noise level, and outlet velocity required. Precise process and velocity control are achieved at every stage of valve opening, with exceptionally high rangeability in a single control valve.
For gas and steam applications, extreme noise and vibration are reduced or eliminated. The patented FlexStream technology expands upon the strengths of Mogas quarter turn ball valves to offer application-specific trim engineered for high delta-P applications, replaceable control element design, greater Cv per inch compared to the competition, and a smaller dimensional envelope in a traditional control valve.
