China Pump & Vacuum Equipment - Page 511

HFM pumps are specifically designed for domestic, agricultural and industrial use. Their performance levels, mechanical design and structural materials are explicitly selected for these uses, The shapes of their volutes and impellers with ample passages, make them suitable for pumping even fairly dirty water. (They can achieve high delivery rates under continuous or heavy duty, making them advantageous for rain and gravity irrigation, for pumping water from lakes, rivers, wells and for a wide variety of industrial uses where high delivery rates must be achieved at low to average heads.) The pumps should be installed in a covered area, protected against the weather.

WORKING PRINCIPLE

The LYQSA is a single open impeller centrifugal submersibled rainage pump designed to function either partly to totally submerged. The impeller, mounted on the end of the drive shaft, consists of a back disk and blades. The fluid enters the rotating blade channel through the suction, where it moves radially from the center outwards, acquiring energy both in the form of pressure and increased speed. When it leaves the impeller the fluid is conveyed towards the volute. Here part of the kinetic energy is transformed into pressure energy, and the fluid leaves the pump via the side delivery opening in the pump body. Correct motor cooling is ensured by the fluid being pumped.

PUMP INSTALLATION AND APPLICATIONS

QSB is designed to pump clear or slightly dirty water not containing abrasive substances.

A purposely built pit with minimum dimensions 350*350*350h mm is recommended for fixed installation, to provide total drainage and allow correct operation of the float switch. This system automatically starts the pump when the fluid reaches a preset level, stopping it once the fluid has been emptied.

Installing a suitable non return valve on the delivery pipe prevents reverse flow when the pump stops.

PERFORMANCE

When designing performance levels for LYQSA pumps, special attention was given to typical requirements for domestic usage.

Performance curves specially designed for high delivery rates at the low installed power rating.

Voltage/Frequency: 230v/50-60HZ

Input power: 810w /1210W

Delivery rate max: 3,600l/h

Delivery height max: 40m

Delivery depth max: 8m

Water tempermture max: 35 C

Noise level: 82dbA