Biral L 322 [22/56] English

english

4.4 Installation

Installation only after completion of all welding and soldering work.

Be sure to avoid any water dripping onto the pump motor

and especially the terminal box.

The arrow on the pump casing shows the direction of flow.

The shaft must always be horizontal, never vertical.

Install the pump casing stressfree in the system.

Install a stop slide valve before and after the pump.

This will save the whole system having to be drained and refilled

in the event of any possible replacement of the pump.

4.5 Minimum pressure

At 75° the minimum pressure at the pump intake, when the pump

is running, is to ensure lubrication of the sleeve bearings:

LLD

Single pumps Twin pumps

L 321, L 325 LD 321 0,3 bar

L 322, L 323, L 324, L 326 LD 322, LD 323, LD 324 0,5 bar

L 401, L 402 LD 401, LD 402 0,3 bar

L 403 LD 403 0,5 bar

L 501, L 502 0,3 bar

L 503, L 504 LD 503, LD 504 0,5 bar

L 651, L 652 0,6 bar

L 653, L 654, L 655 LD 653, LD 654, LD 655 0,8 bar

L 801, L 802 LD 801, LD 802 0,8 bar

L 803, L 804, L 805 LD 803, LD 804, LD 805 1,0 bar

L 1001 LD 1001 1,0 bar

L 1002, L 1003, L 1004 LD 1002, LD 1003, LD 1004 1,75 bar

The values apply up to 500 m (1640 ft) above sea level.

Additional pressure for greater heights:

0.01 bar per 100 m (328 ft) additional altitude.

Additional pressure for: 90 °C 0,35 bar

110 °C 1,10 bar

140 °C 3,30 bar