Floating Arms

W9000 & W9500

The series is a float operated discharge arm designed for use on the outlets from tanks when varying liquid levels are to be accommodated in association with the demand for a controlled rate of gravity discharge.

The series W9000 floating arm is a variable discharge type with single float arrangement. For minimum critical flow level the constant discharge floating arm with either single or twin float arrangement is recommended.

The outlet flange is supplied in accordance with BS450 PN16 rating.

Features Table
Features
Robust Construction
Low maintenance
Metal to metal swivelling parts
Galvanised arms
Fixing bolts and nuts


Options
Alternative material for swivel
Constant discharge
Twin floats
Isolating valve
Alternative flange connection
Expanding type fixing bolts


Discharge of Water
The discharge of water from an orifice can be calculated from the following formula assuming the water has a free discharge. Q= mA √2gh 1000 Where Q = discharge in litres/sec A = area in mm h = height from centre of orifice in metres V = velocity of issuing water in metres/sec = √2gh m = Coefficient of discharge – coefficient of velocity x coefficient of contraction g = 9.81 metres/sec2 The coefficient of velocity of water from a submerged orifice = 0.97. The coefficient of contraction of an orifice comprising a bevel edged thin plate =0.86