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Multi-Z valves are used if solids are entrained in the medium and if there is a possibility of cavitation forming. In addition this multiple stage valve is capable of reducing high-pressure differentials via a multiple stage relief process. Flowserve reduces pressure via division in partitions, a course which is different to that pursued by other suppliers. The major advantage is a noticeable reduction in wear combined with an extremely low-noise control valve. Likewise deviating from conventional procedures, in order to avoid cavitation a physically optimized technology has been implemented that achieves significantly better results.
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The Valtek NR diaphragm actuator is a compact actuator with high torque and pneumatic stiffness for excellent throttling capabilities. The splined shaft connection eliminates backlash for precise control. Designed for supply air pressures to 80 psi (6 Bar). The high stiffness and rolling diaphragm provides firm control from 0 to 90 degrees.
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The Valtek NT 3000 Series Electro-Pneumatic Transducer is an active I/P Transducer that is used with a milliamp electricl control signal. It is interchangeable with the XL Series or Beta Series Pneumatic Positioners and can be mounted on either Valtek Linear or Valtek Rotary Actuators without modification.
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The Valtek ShearStream is a segmented, ball control valve that provides exceptional control and rangeability for the process industries. Designed to overcome the problems of harsh, particle entrained processes, ShearStream also provides accurate, reliable control in a broad range of applications, such as chemical, power and petroleum.
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SideWinder trim prevents cavitation from forming and minimizes hydrodynamic noise in high pressure drop, low flow applications. Staged pressure drops eliminate cavitation by maintaining pressure above the vapor pressure, so that cavitation never forms. Using the proven DiamondBack advanced pressure drop mechanisms in an axial flow configuration producing precise control in low flow conditions.
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The StarPac 3 intelligent control system offers repeatability, accuracy and quick system response time with a small footprint and simple installation. It can stand alone or be integrated into a system, and is available for a variety of applications including oil and gas, chemical, paper, mining, industrial gases and power generation. Unique to the market, StarPac intelligent control systems give users an integrated view of the process at a single point and can improve plant operation at a lower installed cost than conventional control systems. The StarPac 3 builds on previous designs. Upgraded features include explosion-proof housing, USB and infrared interface, updated electronics, stainless steel options and enhanced positioner functions.
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Stealth control valve trim reduces control valve noise and vibration in the most demanding gas applications. Stealth combines new advances in noise control with previously proven technologies to create the most effective device capable of eliminating noise in the most demanding services. In addition to reducing the pressure gradually, Stealth takes advantage of frequency shifting by providing small outlet holes which raise the frequency and lower the noise.
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The unique Survivor control valve design solves the harshest erosion, corrosion and flashing applications. With a variety of ceramic trims available, no other valve will last longer, even in applications with demanding flashing and erosive particulate. The unique design of the Survivor directs flashing energy away from critical equipment. Unique packing configurations solve difficult sealing problems associated with solids entraining the process fluids.
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TigerTooth control valve trim creates multi-staged pressure drops that are effective in reducing noise and vibration in gas services and in eliminating cavitation in liquid services. TigerTooth effectively reduces noise and vibration in gas services by up to 35 dBa through staging, attenuation and velocity control. TigerTooth uses multi-stage pressure drops to eliminate cavitation in liquid services.
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The Valtek Valdisk valve is a high-performance butterfly control valve. Its double-offset shaft provides eccentric-cammed disc rotation to lift it out of the seat, thus immediately eliminating seat friction, to improve throttling control and reduce seat wear. A one-piece splined shaft connected to a clamped actuator lever provides excellent throttling control. Its soft seating arrangement is designed for bubble-tight shutoff while maintaining low breakout torque.
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The Valdisk TX3 is a high performance triple offset butterfly control valve capable of closing with zero leakage. The precision seat and seal are machined at an offset angle creating even seat loading around the entire seat ring and eliminating rubbing between the seat and seal during opening and throttling. This design provides repeatable long-lasting zero leakage shut-off.
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Valtek VL series spring cylinder linear actuators are powerful, compact, high-performance pneumatic actuators that provide solid throttling or on-off operation for automatic control valves. The positioner supplies air to both sides of the piston, providing stiff, precise movement and high-frequency response and quick stroke speeds.
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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. Designed for supply air pressures to 150 psi (10.3 Bar) to eliminate the need for a pressure regulator. The high stiffness provides firm control from 0 to 90 degrees.
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The Valtek XL Series (XL and XL90), two-stage positioners offer fast and sensitive dynamic response characteristics to meet extremely demanding control objectives. The positioners are available with either an electro-pneumatic (I/P) transducer module for milliamp current control signals or a pneumatic module for aircontrol signals. Designed for high performance, these positioners are field reversible and ruggedly built for reliability in severe industrial environments.