AMOT 10GEF, Operation And Maintenance Manual, Page: 15 / 80

15
Valve Body
OMMG00012 Rev 12 – NOV 2019
Section 3
Valve Body
Contents
Para Page
3.1 Description ............................................................................... 15
3.2 Installation ............................................................................... 15
3.3 Operation ................................................................................. 16
3.4 Maintenance ............................................................................. 16
3.4.1 Dismantle and Assemble 2 and 3 inch Valves ..................... 16
3.4.2 Dismantle and Assemble 4, 6 and 8 inch Valves.................. 17
3.4.3 Dismantle and Assemble 10 and 12 inch Valves .................. 19
3.4.4 Recommended Spares ..................................................... 21
3.1 Description
The G Valve is a compact and rugged 3-way control valve designed for
temperature control using ‘diverting’ or ‘mixing’ techniques.
The valve can be constructed from a variety of materials making it suitable for
sea and fresh water, most lubricating oils and other liquids (see Section 2.2
“Identification of model code”).
3.2 Installation
WARNING
The valve body is heavy, refer to Section 9 (Technical Data) Sect 9.1.3
– page 76. The appropriate manual handling precautions must be
applied to avoid personnel injury.
When installing the valve, the following factors must be considered:
•
Position the valve as close as possible to the point where it can best effect
control.
•
Install a minimum of 6 pipe diameters in length from any intersection to
ensure a good mix of fluids. Too great a distance may induce unnecessary
time lags into the system affecting accuracy and stability of temperature
control.
•
Future maintenance is simplified if the valve is installed in the upright
position in an accessible location.
•
Do not install the valve in a position that inhibits the operation of the
manual override handle (if fitted).
•
If possible, avoid installation in areas with a risk of water spray or
extreme dirt.