Wood’s Powr-Grip MR411LAC - Manual (Page 5)

Rev 22.0/12-13 3 MR4-AC: #35051
SPECIFICATIONS
Description: Designed for use with a crane or other hoisting equipment, MR4-AC lifters employ
vacuum to hold a load for lifting, and they provide manual 360° rotation movements for
load manipulation.
Model Number: MR49AC MR4HV11AC MR411LAC
Vacuum Pads: 9" [23 cm]
nominal diameter
(Model VPFS9)
10" [25 cm] nominal
diameter, lipped
(Model HV11) 1
11" [28 cm] nominal
diameter, lipped
(Model G3370)
(Four, standard rubber, spring-mounted for ¼" [7 mm] travel, with #60 filter screen)
Maximum Pad Spread: 2 23½" x 29½" 25" x 31" 26" x 32"
(to outer edges) [599 mm x 752 mm] [635 mm x 787 mm] [661 mm x 813 mm]
Load Capacity: (rated at 16" Hg [-54 kPa] on clean, smooth, nonporous flat surfaces 3 )
Per-Pad: 125 lbs [56.5 kg] 150 lbs [68 kg] 175 lbs [80 kg]
Maximum: 500 lbs [225 kg] 600 lbs [270 kg] 700 lbs [320 kg]
Lifter Weight: 2 90 lbs [41 kg] 94 lbs [43 kg] 93 lbs [42 kg]
Rotation Capability: Manual, 360°, with automatic locking at each ¼ revolution (when desired)
Power Source: See serial number plate for specific AC voltage, frequency and amperage.
Vacuum Pump: Rotary vane type, 4 SCFM [113 liters/minute] nominal airflow or
Diaphragm type, 3 SCFM [85 liters/minute] nominal airflow or
Rotary vane type, 2.5 SCFM [71 liters/minute] nominal airflow
Vacuum Reserve Tank: Vacuum reservoir helps prevent immediate vacuum loss in case of power failure.
Vacuum Gauge:
Dial gauge indicates current vacuum level in positive inches of Hg and negative kPa.
Options: Available with Model EO2GSL - Vacuum Lift Light. Optional green indicator light is
energized whenever vacuum level is sufficient for lifting maximum load weight (higher
than 16" Hg [-54 kPa]). See separate instructions about this option.
Available with Model CF8LFO - Linear Pad Frame. This option provides support and
reduces overhang when the lifter is used to handle long, narrow loads. 2
See separate instructions about other options.
Operating Elevation: Maximum = 8000 ft [2438 m]
Operating Temperatures: 32° to 100° F [0° to 38° C]
Service Life:
This lifter is designed to have a service life of at least 20,000 lifting cycles, when used
and maintained as intended. Vacuum pads, filter elements and other wear-out items
are excluded; see MAINTENANCE and REPLACEMENT PARTS LIST for more information.
For the D ISPOSAL OF THE L IFTER after its service life, see INTENDED USE.
ASME Standard BTH-1: Design Category "B", Service Class "0" (see www.powrgrip.com for more information)
!!-CE-!! Note: This symbol appears in the INSTRUCTIONS manual only when requirements of a CE Standard are different from requirements of
other standards that also apply to this vacuum lifter. CE requirements are mandatory in geographical areas where CE Standards apply, but may
be optional in other locations.
1
Available with optional closed-cell foam rings for applications on rough or textured surfaces.
2
If a lifter is equipped with the Linear Pad Frame (option CF8LFO), the Maximum Pad Spread is as follows:
With model VPFS9 vacuum pads: 10" x 58" [254 mm x 1473 mm]
With model HV11 vacuum pads: 11" x 59" [279 mm x 1498 mm]
With model G3370 vacuum pads: 12" x 60" [305 mm x 1524 mm]
In addition, this option adds 9 lbs [4 kg] to the Lifter Weight.
3
Load Capacity is based on a friction coefficient of 1; see MAINTENANCE: V ACUUM P AD M AINTENANCE : Friction Coefficient for
additional information.