20 some years ago, there were very few polyurea pumps available and they were expensive and complicated. Many new pumps have come on the market, mostly copies of other pumps. Belt drive systems have been changed predominantly to chain drives. Most polyurea pumps are gravity fed with tanks mounted above the individual gear pumps for the isocyanate and polyol sides. A huge problem with all pumps is the isocyanate side quickly reacts to air and becomes brittle and aggressively adheres to everything. Contractors have told me that of all their expensive equipment, one of their biggest maintenance issues are their polyurea pumps.
When tank lids are lost or not securely mounted air-tight, you run the risk of the isocyanate crusting on the surface and aggressively bonding and hardening to metal surfaces. The openings at the bottom of the tanks can become restricted or closed off, filter screens can harden to the tanks and thin crusted layers on the top surface can break into small pieces and get sucked into the pumps and lines. On the manifold where the static mixer attaches, the isocyanate can cure into any opening and crust onto the threads. Anyone that has cleaned a pump of cured isocyanate will attest to the difficulty in doing so. It’s hard work, takes a long time and therefore, may be skipped and left for the next crew. All of this adds up to a lot of cost in labor, downtime and damaged parts.
For those reasons, VeloBond designed a unique polyurea pump that sucks materials out of pails rather than using a gravity fed system. There are no tanks to clean and when the suction hoses are removed, the lines are simply greased and plugged to provide a sealed system to prevent oxidation. In addition, the pump is cordless and has one master switch to turn it on, off, charge, or for alternate power. Other battery pumps on the market require the disconnection of hard lines which oftentimes is a knuckle buster.
There are, however, many joint fillers with thick and/or uneven viscosities, mostly epoxy joint fillers. Those fillers either need to be super-heated to thin the viscosity to be sucked out of the buckets, sometimes they require different sized sprockets to get them on ratio, larger motors with more torque, and sometimes you simply have no choice other than to use tanks to gravity feed material into the gear pumps. For that reason, we offer custom solutions such as machines with tanks, adapters to fit tanks to machines without them and larger motors. Our polyurea pump with tanks comes standard without a battery, inverter and charger. It is an option that can be added because we know many contractors travel to jobs that have no power for charging, especially overnight, and they have no problem using generators on certain jobs.