Adanac design and manufacture stem extensions for various applications.
Manufactured in Carbon and Stainless Steel materials to suit the users requirements in terms of length and configuration including:
Simple Lagging Extension
Extending the handwheel or lever allowing the valve to be operated through pipe/process lagging. Standard extension lengths are 65mm,
100mm and 150mm although Adanac’s flexible approach to manufacturing allows for the design and manufacture
of lagging extensions at non-standard lengths to suit the user’s particular requirements.
Tee Bar Lagging Extension
Replacing the existing lever or handwheel with a simple Tee Bar operator to allow the valve to be functioned through pipe/process
lagging. Standard extension lengths are 100mm and 150mm although Adanac’s flexible approach to manufacturing
allows for the design and manufacture of lagging extensions at non-standard lengths to suit the user’s particular requirements.
Double Lagging Extension
Extending both the stem and top works of Ball and Butterfly valves allowing for the valve operator to be fitted outside of pipe/process
lagging. This type of extension is suitable for actuated and gear operated valves. Also valves fitted with accessories including locking
device, switchbox and position indicator.
Double Lagging extensions can be provided sealed to the existing valve top works with a secondary stem seal at the top. This is suitable
for a number of applications, particularly where there is a risk that leakage from the valve stem seal beneath the pipe/process lagging
may go undetected.
Remote Operation Stem Extensions
Typically longer than the standard lagging type extension, Adanac design and manufacture stem extensions
to applications where direct access to a valve is not possible. For example where a valve is located below ground, perhaps submerged
in a filled chamber, an Adanac stem extension can be fitted to move the valve operator to a more accessible
position. Remote operation extensions may include universal joints or bevel gears where the extension has to divert around obstructions
between the valve and its operator.
The Adanac remote operation extension may include a floor stand to support the valve operator, gearbox
or actuator and may also incorporate a means of indicating the valve’s position to the operator.
Buried Service Stem Extension Adanac design and manufacture extensions for valves buried below ground. Fully sealed to the valve to
contain leakage from the stem seal and prevent contamination from in-fill and tested as a pressure containing component. Where applicable
with valve drain, bleed/vent and sealant injection points piped to the top of the extension to allow for maintenance of the valve
from above ground. Extensions can be provided oil filled where requested, manufactured from corrosion resistant materials or provided
with a coating suitable for the environment.