MTS Series 248 Actuators - Manual (Page 37)

How to Precharge the Static Support
Series 248 Actuator Product Information Operation 37
How to Precharge the Static Support
The static support must be precharged with N
2
gas. The gas is ported to the
pedestal tube, where it pushes upward on the piston rod and supports the
structure or component with minimal pressure differential (
ΔP) across the piston.
Pressurized N
2
is also ported to the bottom and the end cap cover plate.
Before you adjust the precharge pressure or service an actuator with a static
support assembly, read the following warnings.
Do not disassemble the static support or actuator while they are
pressurized.
Disassembling the static support or actuator while they are pressurized can
can cause their parts to become projectiles, which can injure personnel and/
or damage equipment.
Completely discharge nitrogen pressure from the static support before removing
any parts.
Dry nitrogen is used to precharge the static support pressure vessel.
Injury to persons and/or damage to equipment can result if you use another
gas.
Only use dry nitrogen gas to precharge the static support pressure vessel.
Transfer of gases from high to low pressure containers causes refrigeration.
Refrigeration can be sufficient to freeze skin.
Wear heavy gloves and safety glasses when working with pressurized gases.
Venting of pressurized gases can generate loud sounds.
Loud sounds can cause damage to hearing.
Use proper precautions (ear plugs or other hearing-protection devices) when
venting or transferring gases.
WARNING
WARNING
WARNING
WARNING