HD BLEACHED PULP STOCK TANK VALVES
CHALLENGE High Density (HD) Bleached Pulp Stock Tanks are prone to overflowing and commonly cover the valves and actuators with this highly corrosive material. Due to the corrosive nature of the product, conventional actuators with epoxy coatings continue to rot and fail prematurely. SOLUTION Q Series Actuators on V-Ball Valves with remote mount digital Positioner…
DIGESTER STEAM VALVE
CHALLENGE The steam pressure control valve to the digester is subjected to high vibration and the cast iron actuator yoke legs were fracturing causing unplanned downtime. SOLUTION L-Series actuator with a stainless steel yoke was offered on a 6” globe control valve. This reduced the total mass and moment arm acting on the actuator eliminating…
NATURAL GAS METERING
CHALLENGE Customer was experiencing reliability issues due to corrosion of ferrous components causing leakage and reduction of torque output. SOLUTION F Series actuator was supplied for trunnion ball valve with stainless steel cylinders and fasteners (standard construction). RESULTS Corrosion issues were resolved resulting in standardization for metering stations across the state. Applications include city gate…
PRE-LOAD BALLAST SYSTEM
CHALLENGE The Pre-Load Ballast system requires Actuators to be submerged in seawater to depths of 30 feet. Actuators that were being used allowed water ingress into body cavity, which resulted in corrosion and premature wear of internal components. SOLUTION Q Series stainless steel actuators offer sealed internals capable of complete submersion to the specified depths.…
FUEL GAS ISOLATION
CHALLENGE Fuel Gas Isolation valve to a combustion turbine required a SIL-2 rated assembly that had Partial Stroke Testing capabilities to allow extended intervals between full stroke testing. SOLUTION F Series actuator was supplied with a 12” full bore floating ball valve. XRCISER option was specified due to capabilities without compromise. RESULTS Customer was pleased…
HEAVY CRUDE FEED FILTER
CHALLENGE Heavy crude filter banks typically consist of 12 or more actuated valves, and are subject to high ambient temperatures and cycle conditions. Current Actuators being used were not meeting the customer cycle life expectations. SOLUTION A complete package that consisted of Q Series ductile iron actuators (Stainless Steel cylinders) with High Temp trim suitable…
NEAT CAT GASOLINE
CHALLENGE The customer had a modulating fail open actuator requirement for a 12” 300# high performance butterfly valve, but other scotch yoke type actuators couldn’t meet the valve torque requirements without exceeding the valve MAST (Max. Allowable Stem Torque). SOLUTION FD2488SR16-S2 actuator was selected based on the torque characteristics that met the valves torque profile,…
COMPRESSOR DISCHARGE FLOW CONTROL
CHALLENGE Natural gas compressor discharge valves are typically large and use pneumatic actuators. This particular valve is modulating and requires precise control. Performance and delivery were key factors for this customer. (line pressure 1150-1350 psig) SOLUTION Because of the throttling performance benefits of QTRCO Actuators, the FD2375DA10 was chosen and installed on a 12” ball…
PP/PE REACTOR
CHALLENGE Customer was experiencing frequent actuator failures due to seal failures, yoke bushing wear and valve linkage alignment and wear problems. Actuators would have to be sent off for repairs. SOLUTION Q and F Series actuators offer robust internals, offset cylinders, pressure balanced shafts and direct mount capabilities to eliminate common points of failure. Along…
FERTILIZER-PRODUCTION
CHALLENGE A major producer of liquid and dry fertilizer was experiencing ongoing corrosion issues with their Fisher control valve actuators. Chemicals falling on the actuators caused iron and steel component failure. SOLUTION L Series actuators are a stainless steel alternative to Fisher linear actuators and eliminate the need for ongoing maintenance. RESULTS A bolt-on replacement…
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