POWER ASSISTED or MANUAL CRANE ( 316 Stainless Steel )
For 4410, 4430, 4630 - 4660 MIXERS
A power assisted crane assembly constructed of 316 Stainless Steel shall be supplied with each mixer mounting assembly. The crane assembly shall be permanently located at each mast in order to facilitate service and plant operator’s safety. In order to safely and efficiently remove and install the mixer, several different boom lifting points shall be provided.
The boom arm shall be 42" inches in length and shall contain seven lifting points every 3" along its length. The maximum reach shall be measured from the center line of the 3" Schedule 40 pipe vertical davit mast member to the center line of the lifting cable. The entire assembly shall have a minimum load carrying capacity of 600 lbs at the maximum boom arm reach.
In order to achieve safe and effective rotation of the mast under lifting loads, a turning arm handle shall be located on the boom arm. Handles located elsewhere will require excessive effort and are deemed unsafe and nonfunctional and will not be considered acceptable. The boom shall be operated in such a way as to permit a rotation of 360°. Such rotation permits the mixer to be removed from the tank in a single lifting and rotation motion.
The winch assembly shall be supplied with either a winch powered by an electrical driving device which is rated at 1HP and 7.5 amps or a Manual operated version (choose one).
The operational combination of the winch and electrical driving device shall raise and lower the mixer at approximately 10 ft. per minute (electrically powered version). The winch shall also be supplied with a handle which will be used for manual backup operation. The winch’s load carrying capability and the liquid media require 1/4" 316 stainless steel lifting cable. A 40 ft. length of cable shall be supplied with each assembly.
The supporting mast swivel assembly and boom shall be made of welded 316 Stainless Steel. Pedestal mounted cranes shall utilize a minimum of 3" Schedule 40 pipe vertical mast member for lifting mixers from 1 to 15 HP. The mast element shall be either mixer mast side wall or pedestal mounted. The entire crane assembly shall not exceed 170 lbs. (for pedestal mounted mixers add 75 lbs. and 35 lbs. for side wall mounting). Anchor bolts (if required) are to be supplied by the contractor in accordance with the method specified by the engineer.
A removable walkway railing must be furnished by others to facilitate unobstructed rotation of the crane and mixer for the express purpose of installation and removal.