Gear pump leakage issue?
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Hello everyone. The pump used in our facility to transport finished products (acrylic resin with a viscosity of around 1000–3000) often leaks. It’s possible that the resin loses its solvents and turns into a solid state, thereby getting stuck in the gears. Has anyone come across a pump with better sealing properties? Are there any pump heads that can be purchased?
This post was last edited by lxn_663 on 2010-6-13 at 16:20. For testing this process, a gear pump is the most suitable choice. I don’t understand the statement that \"the resin turns into a solid after its volatile solvents evaporate\"; do I understand it correctly that changes in temperature reduce the viscosity of the resin, causing it to turn into a solid? The key to this process is that the gear pump has a thermal insulation jacket to control the temperature of the material; if the viscosity decreases, it has a significant impact on gear wear, sleeve wear, and the seal. Additionally, the pump’s rotation speed needs to be kept very low. For high viscosity, using a lip seal is the most suitable option. For those with high viscosity, we use triple lip seals; although it is more expensive, customers report no leaks.
With such high viscosity, a cam pump should be used.
You can try a diaphragm pump! Simple structure, easy to maintain! But the traffic isn’t very constant!
The poster might consider a high-viscosity internal gear pump (magnetically driven). A high-viscosity internal gear pump is an internal rotor pump designed for transporting high-viscosity fluids, with a maximum transport viscosity of up to 300,000. Magnetic drive is used to ensure zero leakage of the medium. There are specific contacts available at any time
Reply to 5# Hebei Hengsheng Pump Industry: It depends on the specific situation. If you are pumping from a barrel, a medium-to-high viscosity barrel pump can be used; if the liquid is transported through pipes, it might be better to use a diaphragm pump, as diaphragm pumps generally do not suffer from leakage problems.
Reply to 6# leesamwen: The drawback of diaphragm pumps is high pulsation. If pump leakage is a concern, a magnetically driven pump can be chosen.