SUGGESTED SPECIFICATIONS - DUPLEX RT SYSTEM

Furnish and install, as shown on plans, a Federal Pump Corporation Duplex Type RT Roof Tank House Pump System. Pumps shall be rated as shown in the pump schedule.

Pumps shall be close-coupled, bronze-fitted, ball bearing, end suction, centrifugal type. Pumps shall have cast iron, back pull-out style casing with flanged suction and discharge connections, centerline discharge for automatic venting, enclosed bronze balanced impeller, bronze wearing ring, bronze shaft sleeve, mechanical shaft seal and copper by-pass line into the seal chamber.

If horizontally split case pumps are preferred to close-coupled pumps, delete the preceding paragraph and add the following paragraph in its place:

Pumps shall be horizontally split case, centrifugal, with cast iron casing the upper half of which shall be removable without disconnecting suction or discharge piping. Pumps shall have enclosed, bronze balanced impellers, bronze wearing rings, alloy steel shaft, bronze shaft sleeves, inboard and outboard ball bearings in moisture-proof housings, plus a mechanical shaft seal on each side of the impeller. Each pump shall be single-stage (or two-stage), connected to its motor by a horsepower-rated flexible coupling and mounted on a structural steel base.

Furnish and install in the roof tank, two 1-pole float switches for on-off control of the pumps and one 2-pole float switch for high-and-Iow water alarm actuation. Each switch with a weatherproof cast aluminum enclosure and mounting pedestal.

Furnish and install a duplex wall-mounting control panel in a NEMA-1 general purpose enclosure including therein two fused disconnect switches (specify circuit breakers in lieu of fused disconnect switches if motors are 20 HP or larger), two magnetic starters, two hand-off-automatic selector switches, an automatic alternator to alternate the cycles of operation of the two pumps and also provide simultaneous operation, if required, and a high-and-Iow water alarm section with 4" bell, indicating light for each alarm condition and a silencing button in the panel cover. All panel components shall be interwired and rated for the motor horsepower and voltage.

If a factory-assembled Roof Tank House Pump System is preferred to a system for jobsite assembly (available only with close-coupled pumps), add the following paragraph to the specification:

The two pumps and the control panel shall be factory-assembled on a single structural steel base. Factory pre-piping shall include a check valve for each pump discharge, an isolation valve for each pump suction and discharge connection and copper suction and discharge headers. A pressure gauge shall be fumished for each header. The control panel shall be mounted on the unit base and factory-wired to the motors.

Pump Schedule:

No. of Pumps: 2 Pump Model No.:

G.P.M. per pump: TDH: ft.

Motor H.P. : R.P.M. : Phase: 3

Cycles: 60 Volts:

Project: