Submittal Sheet

carbide design with the carbon face rotating against a stationary silicon-carbide

face.

5. Bearing assembly shaft shall connect to either a cast bronze impeller. Impeller

shall be hydraulically and dynamically balanced, keyed to the shaft and secured

by a locking capscrew or nut.

6. A flexible type coupling shall be employed between the pump and motor.

7. Pump should be designed to allow for true back pull-out access to the pump’s

working components for ease of maintenance.

8. Pump volute shall be of cast iron design for heating systems or cast bronze for

domestic water systems. The connection style on cast iron and bronze pumps

shall be flanged. Volute shall include gauge ports at nozzles, and vent and

drain ports.

9. To ensure alignment the motor shall be mounted to the bearing assembly via a

bolted motor bracket assembly, and a rubber motor mount shall be used to

assist in aligning the motor shaft with the pump shaft.

10. Motors shall meet scheduled horsepower, speed, voltage, and enclosure

design. Motors through 1 HP shall be resilient mounted, motors over 1.5 HP

shall be rigid mounted. Motors shall have permanently lubricated ball bearings

and must be completely maintenance free. Motors shall be non-overloading at

any point on the pump curve and shall meet NEMA specifications.

11. Pump shall be of a maintainable design and for ease of maintenance should

use machine fit parts and not press fit components.

12. Pump manufacturer shall be ISO-9001 certified and be of U.S. manufacturer.

13. Each pump shall be factory tested and name-plated before shipment and shall

be provided with a (3) year warranty from date of installation.

C. Accessories:

1. EPT seals are applicable on systems with up to 250° F maximum water

temperatures.

END OF SECTION 15540

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