Coppus Low pressure, High Volume Single Stage Steam Turbine RLHA28E
For over 80 years COPPUS steam turbines have been recognized around the world as rugged, versatile drive solutions for lube oil pumps, feed water pumps, fans, generators and other mechanical drive applications. COPPUS turbines are routinely speciﬁed by the petroleum, petrochemical, chemical, sugar, paper, food processing and other industries that require continuous or standby emergency power.
The RLHA28E is a specialized single stage steam turbine designed to provide useful power from relatively low pressure, high volume steam conditions. The design of the RLHA28E allows users to cost effectively utilize single stage steam turbines to drive pumps, fans, compressors, generators and other equipment for applications where typical single stage steam turbines cannot accommodate the high steam ﬂow conditions.
The RLHA28E utilizes a large steam casing with nozzle capacity in the top and bottom half, as well as large inlet and exhaust connections to accommodate large volumes of steam. The large nozzle area and 16" exhaust, also allow the single stage RLHA28E to be used for condensing applications when the higher efﬁciency of a multi-stage turbine would not be cost effective.
Wheel Diameter 28"
Inlet Diameter 8"
Exhaust Diameter 16"
Max Power 4450 HP (3729 kW)
Max Speed 5400 RPM
Inlet Pressure Range 5 - 400 PSIG
Max Inlet Temperature 316°C
Max Exhaust Pressure Condensing to 75 PSIG
Overspeed Trip Control System
The RLHA28E utilizes the COPPUS snap-acting bolt type trip mechanism. The independent system stops the turbine under any load condition by activating the pneumatically actuated trip valve. It is capable of three consecutive nontrending trips within +/-2% of set trip speed.
The Overspeed Trip Collar, installed on the turbine shaft, houses an adjustable, spring loaded bolt. The bolt is retained until a preselected trip speed is reached. When the turbine shaft exceeds the selected speed the bolt is instantly released to unlatch the trip valve. The snap-action tripping is positive, precise and repeatable. The RLHA28E is also available with an optional electronic speed sensor shut-off.
The Overspeed Trip Valve is designed to minimize pressure drop to ensure the highest available pressure at the nozzles for doing work. When released by the overspeed trip system or the manual trip lever the valve is instantly closed to shut off steam. The pneumatic actuator allows for manual resetting against full-line pressure.
The RLHA28E is an axial split horizontal turbine with split sleeve bearings. This design allows easy access for on-site inspection and repair. Additional standard features include:
Rugged foot support system
Woodward TG 13 oil relay governor with pneumatic power assisted actuator
Manual speed changer
Local, remote and overspeed trip
Pneumatic trip valve with solenoid trip
Single piece contoured type wheel
Thrust Bearing (removable without removing rotor)
Oil ring lubricated bearings with oil level guages and water cooling jackets
Forged steel wheels
Special shaft materials
Part load and overload hand valves
Center line support system
Provision for air purge
Labyrinth steam seals
Circulating Oil Cooling
Forced feed lubrication
Tilt pad thrust bearings
Copper free construction for corrosive atmospheres
Single row wheels - Maximum speed to 5400 RPM
Blanket type insulation
Electronic or hydraulic NEMA Class D governors and variable speed controls
Solenoid trips for remote shutdown
Steam sealing system for condensing operation
Axial Position Probes
Bearing RTDs or Thermocouples
Sentinel Warning Valve