There are approximately 19 individual standard
cylinder mounting styles applicable to NFPA high pressure
hydraulic cylinders, used with approximately 3,000 psi working
pressure, as outlined by the National Fluid Power association
(NFPA).
Scroll down to view our mounting style chart for all of Peninsular'
Model HP high pressure hydraulic cylinders.
To select the correct
cylinder mount required for your application you should make sure
that all of your design calculations are correct and that your
application requirements are fully understood. Some important
issues (but not all) to consider are as follows:
Amount of weight
(load) that is to be moved.
Is the load moving
in a vertical or horizontal direction?
Is the stroke travel
unsupported or is it guided or supported in any way?
Is the load being
moved in only one direction or is it being moved in both
directions of the cylinder stroke? If in only in one direction,
is it on the push (extended stroke) or the pull (retracted
stroke) of the cylinder.
What is the
hydraulic line pressure that is driving the cylinder ?
Do you want the
cylinder to “pivot” when the stroke occurs or do you want it
moving in a straight line with the fixed directional mount of
the cylinder.
Once an intermediate
trunnion mount cylinder is ordered, it is most important to know
the XI dimension; this will tell us where to locate the center
trunnion between the front and rear cylinder end caps.
Note:
If the extended piston rod feature is selected for this mount
there will be a change to the stated XI dimension. Specify the
XI dimension under the configurable optional features section of
our configurator. If an extended piston rod or stop tube is
required, these features must be selected first before selecting
the XI dimension. Please
contact us if confusion arises because of this issue.
When selecting a
clevis or eye mounted cylinder (pivoting cylinder) make sure
that all clevis pins are properly greased at the time of
installation; failure to do so will lead to premature cylinder
failure. Peninsular supplies a tube of
grease with all pivot mounted cylinders such as trunnion mounts,
clevis mounts and eye mounts.
When selecting
lug mounted cylinders you may want to "key" the lug mounts.
These keys aid in the prevention of premature cylinder failure by
providing structural support for the cylinder tie rods and the
bolts that are used in fastening the lugs to the mounting
surface of the cylinder.
When selecting
flange mounted cylinders the rod cartridge retaining plate
becomes an important issue because other cylinder manufacturers
may have different shapes and dimensions for their rod cartridge
retaining plates. Note that rod cartridge retaining plates are
not specified NFPA dimensions, and as a result, careful
attention should be paid to the dimensions of the rod cartridge
retaining plate - especially if it is used in conjunction with a
"pilot dimension" to mount a flange type cylinder.
When selecting
head tie rod extended, or head and cap tie rod extended
cylinders careful attention should again be paid to the
dimensions of the rod cartridge retaining plate if it is used as a pilot
dimension to mount extended tie rod mounted cylinders into the
tooling system. Rod cartridge retaining plate dimensions are not specified by
the NFPA, and as a result, other cylinder manufactures may have
different dimensions associated with their rod cartridge
retaining plates.
Note - when selecting
the Head Rectangular Flange (MF1), Cap Rectangular Flange (MF2)
and Cap Fixed Spherical Eye (MP5) mounts that the maximum rated /
working pressure is reduced and the cylinder is rated less for
these mounting styles. Consult Peninsular should further
discussion become necessary about this topic. Call (800) 526-7968
in the USA or Canada or at (586) 775-7211.
By understanding
issues like many of the ones noted above, you will be in a better
position to select the best cylinder mount correctly suited for
your application. You may view our cylinder mounting style chart
by scrolling down.
Confused? If you need any assistance please feel free to call us
toll free at (800) 526-7968 in the USA or Canada or at (586)
775-7211. You may also e-mail us at
sales@peninsularcylinders.com.
