Model AW

Multi-stage, Centrifugal, Close-coupled Pump

Pump & Motor Assemblies

A multi-stage, centrifugal, bronze-fitted, available in either horizontal or vertical design. Pump typically used for applications with flows up to 500 GPM and pressures up to 340 psig. Pump types (such as 121 AW, 129 AW, etc.) selected depend on the design operating conditions—flow rate, discharge pressure and NPSH requirements; impellers trimmed to operating conditions. Pumps are close-coupled and fitted with both suction and discharge ASA flanges. (For flex-coupled pumps refer to Models AWF or AWF-B.)

Typically equipped with industry standard motors available in single or three-phase at 3500 RPM only. Pumps are typically furnished with bleed lines, sometimes called seal flushing lines, to help prevent the pump from vapor binding and to allow pump operation against a dead shut-off for a period of time without burning seals. Standard silicon carbide/viton mechanical seals provide for temperatures up to 300°F. Higher temperature seals and special faces available upon request. All pumps come equipped with an automatic flow control valve for balancing or throttling pump to the designed condition point.

On deaerator applications, where pumps run continuously, an additional bypass orifice must be installed when motor exceeds 7-1/2 HP.