Installation
Page 4
April 2017
VAM-UM-00646-EN-04
Installation Recommendations
Hedland flow meters are designed for easy installation However, the following measures
are recommended for reliable,
trouble-free operation:
• Piping should be accurately aligned and of correct length The high pressure body of the
flow meter can withstand shock and flow/pressure pulsation Piping should be firmly
supported by external mounting brackets, both upstream and downstream of the flow
meter, to avoid any pipe flexing actions that could reduce flow meter life
• If the flow meter inlet or outlet is rigidly mounted, and the opposing port is connected
to flexible hose, the end connected with the flexible hose must be rigidly mounted
• Install a union near the inlet or outlet of the flow meter to facilitate quick and easy flow
meter removal and inspection during periodic maintenance procedures
• Mount the flow meter either horizontally or vertically (flow arrow pointing to either
side or straight up) If the flow meter must be mounted inverted, special inverted scales
are available
• Verify the fluid is traveling in the direction of the flow arrow, see
• Systems that do not have filtration should be equipped with at least a 200 mesh (74
micron) filter Most hydraulic system applications already have much finer filtration The
flow meter will allow particulates to pass that would jam most valves and flow controls
Dirt, ferrous metal or sealing agents may lodge and cause malfunction If the flow meter
is jammed at a fixed position, follow cleaning and maintenance instructions
• Do not use thread locking compounds as thread sealant
• Do not install the flow meter near turbulence producing fittings such as elbows,
reducers and close coupled valves for maximum reliability The inline flow meter does
not require flow straighteners or special lengths of straight inlet/outlet piping to
stabilize turbulent flow patterns
• Do not install the flow meter near fast-acting valves Fast-acting valves have the
potential to create high magnitude hydraulic pressure spikes These spikes can damage
the internal components of the flow meter, resulting in inaccuracies or malfunction
• Do not operate flow meter against the direction of the flow arrow The flow meter is
unidirectional The piston acts as a check valve to block flow in the reverse direction This
causes an excessive pressure differential, which can result in damage to internal flow
meter components
