|
|
| Choose
Your Style: PVS or HYS |
PVS
(Pneumatic/Air/Light Hydraulic)
PVS
Style Self-Locking Cylinders are commonly used for applications
using air. Often the PVS model replaces or substitutes
for more costly hydraulic systems. The solid metal-on-metal
lock allows for high loading without the "squish" associated
with standard air cylinders. |
HYS
(Heavy Hydraulic)*
HYS
Style Self-Locking Cylinders are commonly used for applications
where high moving forces are required. HYS is the perfect
choice in applications which are critical under loss-of-pressure
scenarios. |
|
|
Lock-on-Extend
Theoretical Performance Data
|
|
|
Bore/Rod
|
Lock
Holding Force** (fully extended)
|
Moving
force-Extend (lbs) Air/Hydraulic Pressure (psi)***
|
Moving
force-Retract (lbs) Air/Hydraulic Pressure (psi)***
|
|
75
|
1000
|
1500
|
3000
|
75
|
1000
|
1500
|
3000
|
| PVS-2.00/0.625 |
2,500
lbs |
235 |
3140 |
4700 |
|
210 |
2830 |
4240 |
|
| PVS-2.50/1.00 |
11,000
lbs |
365 |
4900 |
7300 |
|
305 |
4120 |
6180 |
|
| PVS-4.00/1.375 |
17,500
lbs |
940 |
12500 |
|
|
830 |
11080 |
|
|
| PVS-5.00/1.750 |
45,000
lbs |
1470 |
19600 |
|
|
1290 |
17200 |
|
|
| PVS-6.00/1.750 |
45,000
lbs |
2120 |
28200 |
|
|
1930 |
25800 |
|
|
| HYS-2.00/1.00 |
20,000
lbs |
235 |
3140 |
4700 |
9400 |
170 |
2350 |
3500 |
7050 |
| HYS-2.50/1.375 |
30,000
lbs |
365 |
4900 |
7300 |
14700 |
250 |
3420 |
5100 |
10250 |
| HYS-4.00/1.750 |
50,000
lbs |
940 |
12500 |
18800 |
37600 |
760 |
10150 |
15200 |
30400 |
|
Accommodation
of Locking Clearance / Overtravel
To
ensure locking, the cylinders allow for 0.004" to 0.013" of
overtravel (end play) beyond the lock seating position. When
pressure is removed or load applied after a locked condition
is achieved the rod will move until the clearance is taken
up. The overtravel clearance can be eliminated by careful positioning
of the cylinder. Consult a PFA Applications Specialist for
details.
*
Heavy Hydraulic Style may be operated pneumatically in
some applications. Consult PFA for details.
**Cylinder
locking/holding force is a function of rod column strength
and depends on overall stroke length and proper load
guidance/installation.
***Maximum
pressure for PVS units is 1500 psi or 1000 psi depending
on size (see grey area limits in chart), Maximum pressure
for HYS units is 3000 psi.
| Mounting Styles |
MF1
Front Flange
The Front Flange Mount offers
4 mounting through holes to provde a means of
simple installation with a face mount.
Cushions
Optional adjustable cushions
are available at both ends of cylinders stroke
to slow down prior to end of stroke for process
control.
Option
Locations
Ports, Sensors and Cushions
can be positioned on any of 4 sides of the cylinder.
While they can be on any side, no two options
can be at the same location on the same end of
the cylinder.
MF2 Rear Flange Mount
MF2 Mount provides the same
simple interface as the MF1 with the convenience
of a rear location.
MP1
Rear Clevis
The MP1 Rear Clevis offers
a rear pivot mount for applications requiring
dynamic positioning.
MS2
Foot Mount
The MS2 Foot mount provides
a means of flush or table-top mounting via 4
feet along the body of the unit.
MS4
Bottom Tapped
The MS4 Bottom Tapped mount
allows for direct mount to a flat surface via
bolting through that surface into 4 tapped holes
in the cylinder body.
MT1
Front Trunion
The MT1 Front Trunion provides
a means of mounting on a front pivot point via
two trunion pins on either side of the front
head of the cylinder.
Sensors
The Sensors offer positioning
and locking verification. The front or locking
sensor detects the locking mechanism after it
engages. Since the lock cannot engage unless
full forward stroke is achieved, the front sensor
serves to verify both the forward stroke and
lock conditions. The rear sensor detects the
piston upon full retraction. Click for sensor
tech sheet.
|
| MF1
Front Flange |
| MF2
Rear Flange |
| MP1
Rear Clevis |
| MS2
Foot Mount |
| MS4
Bottom Tapped |
| Options |
| Sensors |
| Cushions |
| Option
Locations |
|
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W18251 Bunsen Dr. • Germantown, WI 53022
(262) 250-4410 • Fax: (262) 250-4409 • Email: staff@pfa-inc.com
|
