This
simple arm incorporates only three swivel planes of
rotation and is designed for use in top loading installations
where the vehicle is located at a fixed distance from
the riser pipe. Two swivels at the inlet permit both
up-and-down and side-to-side movement of the assembly,
and the third swivel allows the drop pipe to remain
vertical.
Primarily used to load and unload
rail cars through open domes in installations where
the cars can be accurately spotted, the single arm
configuration can also be used for tank truck applications.
Some allowance for mis-spotting is possible with the
single arm and increases as the diameter of the hatch
opening increases.
Valve
located inboard on primary arm is optional. Also available
with valve located outboard to minimize drippage of
viscous products after loading is completed.
Adaptable to tight fill or closed system loading when
equipped with additional swivel planes of rotation and
/or drop hose, along with required outboard coupling
or fitting.
Available in 2", 3", 4", and 6"
sizes in steel, stainless steel, aluminium, and specialty
alloys. Threaded, welded and flanged construction available.
Supported
Boom Arm
This style arm provides dependable, low maintenance
service in high usage installations. Due to the boom
mounted design, no heavy loads are placed on the swivel
components, so wear is minimized.
In simplest terms, the supported
boom arm consists of a single arm loader mounted on
a swiveling boom that is attached to a permanent structure
with either a pillow block or flange bearing for added
strength and support. This configuration provides maximum
flexibility for mis-spotting and longer reaches from
the loading rack to the tank truck or rail car. Both
the boom and the arm can be folded back against the
rack for convenient, compact storage away from the traffic
flow.
A
Variety of boom designs and configurations ar available
to meet the needs of virtually any installation. Used
for tank truck and tank car open dome loading, supported
boom arms can be modified for closed system loading
and unloading, both top and bottom. Valve is optional. Available in 2", 3", 4", and 6"
sizes in steel, stainless steel, aluminium, and specialty
alloys. Threaded, welded and flanged construction available.
Slide
Sleeve Arm
This
type of arm incorporates a slide sleeve assembly that
telescopes in and out to adjust for variations in the
distance from the loading rack to the hauling vehicle.
It is used primarily in small bulk plants and terminals
for top loading gasoline, fuel oil, or other petroleum
products. The slide sleeve arm is a medium duty unit
designed for flow rates up to 15 ft/sec (4.5m/sec).
Higher flow rates may tend to push the inner tube out
beyond the loading point.
Available in 2", 3", and 4" sizes. Typically
supplied with female threaded inlet connection in 2"
size (A-32), with 150# ANSI flanged inlet in 3"
and 4" sizes (A-32-F)
Slide
sleeve assembly has brass inner tube and aluminum outer
sleeve. Deadman type loading valve, drop tube swivel,
and drop tube are aluminum. Available with ductile iron
or carbon steel inlet swivel join. Viton seals are standad.
Both torsion spring balanced and counterweighted slide
sleeve arms are available. The spring balanced model
is most common due to its compact design and adjustability.
The counterweighted version requires considerably more
clearance space behind the arm to operate.
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