Specifications - City of Montpelier, Vermont

Title:Montpelier District Heating15453 – Plumbing PumpsCity of Montpelier, VTIssue Date:September 28, 2012Page #:5 of 92.4 VERTICAL SUMP PUMPSA. General Description: Pumps shall be simplex, vertical, suspended, centrifugal,separately coupled, end suction, single stage, bronze fitted, complete with integralinlet strainer, operating controls, and sump cover.B. General Description: Pumps shall be duplex, vertical, suspended, centrifugal,separately coupled, end suction, single stage, bronze fitted, complete with integralinlet strainer, operating controls, and sump cover.C. Casing: Cast iron with integral castiron inlet strainer.D. Impeller: Statically and dynamically balanced, open or semiopen, overhung,single suction; fabricated from cast bronze conforming to ASTM B 584, keyed toshaft and secured by a locking capscrew.E. Pump Shaft and Sleeve Bearings: Stainlesssteel shaft with bronze sleeve. Thrustbearings shall be greaselubricated ball bearings. Intermediate and bottombearings shall be self lubricated.F. Pump and Motor Shaft Couplings: Flexible; capable of absorbing torsionalvibration and shaft misalignment.G. Motor: Vertically mounted on castiron pedestal.H. Basin: Fiber glass with inlet connections.I. Basin: Cast iron with inlet connections.J. Basin: Welded steel with inlet connections.K. Cover: (Castiron, steel or aluminum), round cover, access opening and openingsfor pump shaft, control rod, and discharge piping.L. Controls (Simplex): NEMA 1, motormounted float switch complete with float,float rod, and rod buttons.M. Controls (Duplex): NEMA 1, motormounted float switch complete with float,float rod, and rod buttons. Automatic alternator shall alternate operation to unitson successive cycles and operate both units when one unit cannot handle the load.N. Manufacturer’s – Sump PumpsPLUMBING PUMPS 15453 5