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© 2007 Mascott Equipment Co. Inc
Complete equipment specifications and quotations available on request
LOADING
ARMS
 
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(Vapor recovery loading arms are at the bottom of the page)
    
Items with this button
are orderable online
Bottom Loading  

OPW ENGINEERED SYSTEMS BOTTOM LOADERS — Bottom loading systems offer
numerous benefits over conventional top loading systems, including:
• Safety of the person operating the loading arm, since the operator is on the ground
     rather than atop the vehicle where falls are a common threat.
• Bottom loading systems create less turbulence in the tank, reducing the danger of
     generating static electricity.
• Bottom loading not only reduces vapors, this system can also be easily adapted to
     fully recover vapors displaced during the tank loading process.
• Speed is the key advantage of bottom loading. Tanks can be filled faster and a
     number of compartments can be loaded simultaneously.
• Bottom load islands are are simpler and more economic to build. You can realize
     more savings because you'll safely load more product in less time with less spillage
     and vapor loss.

Dimensional information on the bottom loaders may be obtained by clicking the
'Details' links on the right.

       
       
  UNSUPPORTED BOOM-TYPE BOTTOM LOADER — Typically installed at or near
ground level, the unsupported boom-type bottom loader is versatile with a number of
variations possible.

A minimum of five swivel planes of rotation offer complete flexibility in making tight
connections for loading and unloading rail cars, tank trucksand servicing aviation refuelers.
The outboard swivel and arm adjusts for any changes in elevation or tilting that may result
as the vehicle is loaded or unloaded.

Available in 2", 3", 4" and 6".

  
Info
(175kb)
    
  'A' FRAME BOTTOM LOADER — Commonly used for tank truck bottom loading, 'A'
frames provide good flexibility, long reach and are convenient and easy to use.

The arm stores in an upright, near vertical position, allowing easy swinging of the arm
around for loading from either side of the island. The outboard swivel and arm adjusts for
any changes in elevation or tilting that may result as the vehicle is loaded or unloaded.

Available in 2", 3" and 4".
Info
(168kb)
    
  'A' FRAME BOTTOM LOADER — The same features and benefits as the conventional
'A' frame loader above but with a flexible hose replacing rigid piping on the secondary arm.
The minimum recommended drop hose length is approximately 60".

Mounting heights on this style arm are shorter than those required for other hose loaders.
The arm can be staggered to achieve crossover and conformance to API envelope
requirements.

Available in 2", 3" and 4".

  
Info
(142kb)
    
  COUNTERWEIGHTED HOSE BOTTOM LOADER — Installation and operation of this
loading arm system is simple and efficient: adjustable counterweights mounted on a pair
of horizontal rails are simply moved until the desired balance point has been located.

Available in 4" and 6" x 4" sizes.
Info
(156kb)
    

Short Range


Long Range
  SPRING BALANCED SHORT AND LONG RANGE BOTTOM LOADERS — Like
counterweighted hose loaders, spring balanced models are generally stored at horizontal.
The short range spring balanced model has the torsion spring mounted back at the riser,
while the long range version locates the spring a short distance out on the arm.

Available in 3" and 4".
Info
(141kb)
    
         
Top loading
   OPW ENGINEERED SYSTEMS TOP LOADERS — A top load system, properly
designed, should have sufficient horizontal range to reach the farthest compartment of a
tank or railcar without respotting the vehicle. Sufficient vertical movement and drop pipe
length to service vehicles of varying height is also a necessity.

Dimensional information on the top loaders may be obtained by clicking the
'Details' links on the right.

   
  SINGLE ARM FIXED REACH TOP LOADER — Primarily used to load and unload
railcars through open domes in installations where the cars can be accurately spotted.
The single arm configuration can also be used with tank trucks applications. Some
allowance for mis-spotting is possible with the single arm and increases as the diameter
of the hatch opening increases.

The simple arm incorporates only three swivel planes of rotation and is designed for use
in top loading instances where the vehicle is located a fixed distance from the riser pipe.
Available in 2", 3" and 4".
Info
(126kb)
    
  SCISSOR-TYPE TOP LOADER —Commonly used for high flow rates and to withstand
rough use in tank truck loading applications, the scissor-type arm is also an excellent
choice for railcar loading in situations where mis-spotting is frequent.

This type of loading arm is designed specifically for top load installations where variable
operating range is required. The secondary arm rotates 360° in the horizontal plane,
providing a spotting allowance of up to twice its length. Available in 2", 3" and 4".
Info
(155kb)
    
  SUPPORTED BOOM ARM LOADER — Providing dependable, low-maintenance service
in high usage installations. Because of the boom-mounted design of this model, no
heavy loads are placed on the swivel components. Wear is minimized.

In a nutshell, the supported boom arm loader 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. The boom and the arm can be folded
pack against the rack for compact and convenient storage away from the traffic flow.

A variety of boom designs and configurations are available, meeting the need of just
about any installation. Used for tank truck and rail car open dome loading, supported
boom arms can be modified for closed system loading and offloading as well.

Optional valves, such as dry disconnect, ball, butterfly or loading, can be used because
of the boom support.
Info
(142kb)
    
  UNSUPPORTED BOOM ARM LOADER — An excellent alternative for variable reach
applications, especially in larger sizes where outboard components are relatively heavy.
This style loader is designed for installations where it's impractical or undesireable to
install a supported boom arm loader (for example, railcar sites that have no columns
or overhead structures to which a supported boom arm loader can be attached).

Like the supported boom arm loader, this choice can be modified for closed system
loading and unloading and is available in assorted design configurations to meet the
needs of virtually any installation.
.
Info
(175kb)
    
  SLIDE SLEEVE ARM LOADER — This type of assembly is used primarily in small
bulk plants and slides out to adjust for variations in distance from the loading rack to
the hauling vehicle.

The side sleeve system is a medium-duty unit designed for flow rates to 15 ft/sec.
Higher flow rates may tend to push the inner tube out beyond the loading point.
Info
(109kb)
    
Top Loading
Vapor Recovery		   OPW ENGINEERED SYSTEMS TOP LOADING VAPOR RECOVERY —Information
provided by the user is a major contibuting factor in the design og a system to capture
vapors. Material compatibility and functional components, the volume of vapors, sensing
equipment placement and weights are other factors.

Vapor recovery systems consist of two flow passage lines — one to convey the product
and the other to recover and transfer that product's vapors. Single product and vapor arms
can be installed at the loading rack. Systems that incorporate product and vapor lines
into a single system are preferred, however, because both connections can be
conveniently moved out to the transporter simultaneously.

OPW Engineered Systems' manufacturing and testing procedures meet or exceed
industry standards. All loading arm assemblies are rigorously tested to ensure high
quality.

Additional testing including radiography as well as material certifications can be provided
to meet specific, specialized applications.		    
  'PIGGYBACK' STYLE ARM — Simple in design but quite functional. It has the vapor line
welded to the product arm. This versatile arm can also be used as an unloader by using
the vapor arm to pressurize a railcar or tank truck equipped with a permanent deep pipe.

    
  DUAL ARM (SIAMESE) — This is the most widely used vapor recovery assembly,
featuring separate arms for product and vapor that are joined together at the inner boom.
One of the more popular variations of the design also has two counterbalance swivels and
the outer arms joined together in a side-by-side arrangement to minimize the overall
vertical dimension of the outboard assembly.

On most dual arm designs the product feeds from beneath and the vapor line from
overhead.

A variety of vapor recovery components are available for applications where loading
takes place through an open dome. These include cover plates, taped hatch plugs/cones
and the OPW inflatable hatch seal.

    
Items above are not representative of our entire product line. They are for information/assistance purposes.