DFSS and DVSS Nuclear Radially Split, Single Stage
Standards
ASME Section III, Class 1 Nuclear
Operating Parameters
• Flows to 24 500 m3/h (108 000 gpm)
• Heads to 250 m (815 ft)
• Pressures to 170 bar (2500 psi)
• Temperatures to 300°C (580°F)
• Speeds to 1800 rpm
• Power rating to 9400 kW (12 600 hp) Services
• Primary coolant
• Reactor coolant
• Primary heat transport
• Fourth generation design
• One-piece cast pump casing
• Double volute design case for BWR and PHWR
• Diffuser with torus-type design casing for PWR
• Upgraded rotating element
– One-piece welded shaft-impellerjournal assembly
– Fully machined and balanced as single rotating unit
• Hydrostatic-pressurized radial bearing
– Operates submerged in radioactive system water at loop temperature of approximately 300°C (580°F)
flowserve pump