Fisher® Severe Service
For decades Emerson’s severe service team has been providing global customers with Fisher® severe service control valve solutions. Whether it is severe service applications for the power, hydrocarbon, chemical or pulp and paper industry, Emerson’s technical experts have provided sound solutions to address critical applications for aerodynamic noise, cavitation and out-gassing issues, as well as particulate erosion.
Aerodynamic Noise Control
Control valve technologies used to reduce the noise (sound pressure level) of compressible flows via one or more techniques of frequency shifting, discrete pressure staging, trim passage shape and/or adequate expansion areas.
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Control Valves |
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Silencer |
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Trim |
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For decades Emerson's severe service team has been providing global customers with Fisher severe service control valve solutions. |
Vent silencers and line silencers provide the solution to high intensity, broadband noise associated with pressure relief systems and gas/steam line turbulence. |
Severe service cages provide effective attenuation of aerodynamic noise in vapor, gas, or steam applications involving high pressure drops or high pressure drop ratios. |
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Trim |
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Severe service vent diffusers are a solution for applications with high noise potential due to low downstream pressure and high pressure drop, throttling generated noise as a function of pressure drop. |
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Cavitation Control
Cavitation control trim constructions are designed to eliminate, or minimize the damaging effects of cavitating applications. Various trim constructions exist for cavitating applications, with selection being dependent on the relative process fluid. All cavitation control trims are designed to stage the total pressure drop of a given application in a way that will provide maximum flow efficiency and trim life.
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Clean Service |
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Dirty Service |
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Other Cavitation Control |
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Clean service is considered to be a fluid free of particulate that may potentially become lodged in the flow passages of the valve trim. |
Dirty service applications are known to contain entrained particulate that would clog the flow passages of trim that this designed for use in clean service. |
Applications where very high pressure drops may have to be taken while maintaining a low, controllable CV. |
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Engineered Solutions
Complete valve solutions, custom engineered for the customer's specific application. May be a brand new construction, or modification to an existing product for optimized performance in a given application.
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Fisher® Engineered Solution - Actuator |
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Fisher® Engineered Solution - Valve |
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Complete valve actuation solutions offering fast stroking time, high thrust output, or unique travels in spring and diaphragm and piston pneumatic actuators. |
Solutions engineered for a specific application. These include large size valves, special pressure class valves, special pressure classes, special body or trim material configurations and materials. |
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Steam Conditioning
Steam Conditioning is the combination of pressure reduction and temperature reduction of superheated steam to fit process needs, protect downstream equipment or allow the use of less expensive materials or schedules for downstream piping. This is done with a pressure reducing valve and a spraywater addition section either as separate units or a single device.
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Fisher® Desuperheaters / Attemporators |
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Fisher® Engineered Valves |
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Fisher® Turbine Bypass |
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Devices used to inject controlled amounts of cooling water into a superheated steam flow to reduce or control steam temperature. |
Steam conditioning valves serve to control steam pressure and temperature by combining both functions within one control element unit. |
Globe and angle valves used to reduce both steam pressure and temperature in gas fired and combined cycle power plants. |
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