BOSS fittings for special water

Mounting information on re-circulating fitting

Installation Unscrew the union nut and lift off the upper part of the valve. Unscrew the flange and mount the lower part from under the table and up into a ø30 mm hole. Remount the flange leaving 9 mm free thread above the flange for the union nut. Use the mounting accessories to fix the lower part. Remount the upper part by sticking the inner tube into the upper part. Place the upper part in the correct position and mount the union nut to the 9 mm M28x1.5 thread with a torque of 20-30 Nm. Connect the valve to the recirculating special water system. BROEN recommend heat welding connections made of PP for the connection for the ø25 mm PP-pipe ends.

Connection methods: PP connections: Welded ABS connections Glued

Working temperature and pressures: Circulating flow rate: The flow rate in the main water flow has to be so high, that the water velocity passing the bent inner tube in the main stream is more than 0,4 m/s. Q = (pi/4) x d2 x v pi = 22/7 Q = Flow rate [m3/s] d = Inside diameter of main tubing [m] (standard: d = ø20mm = ø0.02m) v = Water velocity (> 0.4 m/s) [m/s] Example: standard; d=ø20mm Q = (&Mac185;/4) x 0.022 x 0.4 = 1.26 x 10-4 m3/s = 7.5 l/min Please note that Q = 7.5 l/min should be obtained even with open point of use valves in other parts of the system.