Popular in Course
verified elite notetaker
Popular in Business
This 1 page Document was uploaded by an elite notetaker on Monday December 21, 2015. The Document belongs to a course at a university taught by a professor in Fall. Since its upload, it has received 6 views.
Reviews for More-about-the-Waste-Disposal-Grand-Rapids-Systems
Report this Material
What is Karma?
Karma is the currency of StudySoup.
You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!
Date Created: 12/21/15
More about the Waste Disposal Grand Rapids Systems There are various types of waste disposal systems are used for disposing or cleaning the waste from the drains. A specialized Waste Disposal Grand Rapids technique has arisen for the use of tools of this type, known as “moleing”, because of the similarity to the animal. In this technique, as with drain cleaning, a flexible lance is inserted into a pipe, and uses reaction jets to pull itself along through the pipe, cleaning the surrounding walls as it progresses. The technique can be very effective, since it removes the operator fatigue that would be generated by physically holding, lifting and advancing a rigid lance. It also provides much of the same maneuverability as for the drain cleaner. However, because of the larger diameter tubes that are being cleaned it is important to introduce the rigid lance section behind the nozzle to prevent the flexible lance from reversing itself in the passage. Process The procedure also carries with it another risk. In normal lance operations the operator is in control of the jet pressure through the trigger which controls the dump valve. Since he requires one hand to operate the trigger, and a second to steady the lance, at a point near the trigger, the operator's hands are fixed at a point behind the nozzle, and to that extent protected. Waste Disposal Equipments With a waste disposal Grand Rapids tool, the operator needs both hands to feed the flexible hose into the tube behind the nozzle, and also to pull it out after the tube is clean. In order to control the jet pressure, therefore, the pressure controlling dump valve is frequently built into the circuit in such a way as to be foot controlled. This itself poses no problem, except that, the operator may keep pressure on the jets as the lance is pulled out of the tube, in order to ensure better cleaning and that no residual debris is left in the tube. This creates the risk that, through a lack of warning or attention, the operator may also pull the nozzle assembly, with pressurized jets, through his hands, with a consequent severe injury. In order to minimize this risk, the hose should have both a highly visible, and physical structural marking sufficiently behind the nozzle assembly to warn the operator by sight and feel, before the nozzle exits the tube. The marker should be with some physical identifier, such as a metal ring or collar, since any color coding or other visible marker may become hidden beneath the coating that the hose may pick up as it moves through the line. These markers should also be maintained, since wear on them, as they move along the pipe, will also lead to them coming off the pipe or moving.
Are you sure you want to buy this material for
You're already Subscribed!
Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'