HYDRAU-FLO
®
Description
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Revision: 0
CONTROLLED DOCUMENT
Copyright © 2015, Weir Minerals Australia Ltd. All rights reserved.
Page 3-9
Issue Date: 23 February 2015
3
Description
This section shall detail the technical description and specifications for the Product.
3.1
Hydrau-Flo
®
Fuel Filling Valve
The Hydrau-Flo
®
valve system is a safer, cleaner and more reliable fuel filling valve arrangement which removes the
risk of overfilling, spillage and tank rupture while minimising safety and environmental hazards associated with fuel
transfer. With flow rates up to 1,000 litres/min (265 gallons/min) and pressures up to 100 kilopascals
(20 psi)
, it is
imperative to provide safer solutions for fuel filling. Hydrau-Flo
®
Fuel Filling Systems offer superior operator protection
and improved environmental outcomes.
The Hydrau-Flo
®
Fuel Filling System overcomes the traditional fuel transferring problems without the need for
electronics or complex arrangements prone to blockage and failure. It incorporates robustly designed fuel filler safety
valves and float control valves to provide a reliable, hydraulically operated arrangement which depends on fluid level
rather than pressure. The system is designed to be used in conjunction with existing “fast fill” systems or traditional
“splash” filling.
Advantages of using Hydrau-Flo
®
Valve are:
Prevents overfilling, fuel spillage and wastage
Removes the risk of tank rupture due to pressure build up during and after filling
Minimises the risk of fire as a result of fuel spillage
Reduces costs associated with fuel wastage and equipment damage
Significantly improves safety and environmental outcomes
Reduces fuel theft.
3.2
Working Principle
The system consists of fuel filling valve, a float valve and a pilot line. The Hydrau-Flo
®
valve is activated via fuel level,
not the contained fuel pressure unlike traditional systems.
Figure 3-1: Working Principle of a Mobile and Stationary Fuel Filling Set-up
Fuel enters the system through a “fast fill” receiver and into the Hydrau-Flo
®
valve body. Fuel pressure forces the shut-
off piston open against spring pressure, allowing fuel to flow through the porting into the fuel tank. An orifice in the
piston also allows a metered amount of fuel to bleed off through a capillary line to a float valve located in the tank. This
creates a pressure drop under the piston.
