Industrial Glue Pump Solutions for Adhesives and Sealants

Wilden Adhesives and Sealants

• Are Wilden AODD pumps safe for pumping shear-sensitive adhesives and sealants?

  Yes. Wilden AODD pumps provide gentle fluid transfer for shear-sensitive adhesives in industrial applications. They are ideal for minimizing shear damage to delicate adhesives, as they do not have tight clearances or the fast-moving pumping elements that cause excessive shear in other pump technologies.

• Can Wilden AODD diaphragm pumps handle non-Newtonian or thixotropic adhesives?

  Yes. Wilden AODD pumps are ideal for handling non-Newtonian or thixotropic materials. They are naturally shear sensitive and do not have tight clearances or fast-moving pumping elements that cause excessive shear in other pump technologies. These pumps can also handle a wide range of viscosities and self-adjust to changes in viscosity, meaning that even if the velocity changes during operation, the pump will not be damaged.

• What Wilden AODD pump materials prevent adhesive buildup during sealant transfer?

  PTFE and Wil-Flex® are common diaphragm material options that limit the ability for adhesive fluids to stick to the diaphragms and build up inside the pump. Wilden Chem-Fuse™ Integral Piston Diaphragms (IPDs) feature a one-piece design that eliminates areas where adhesive fluids can accumulate. For the liquid chambers, the PVDF and stainless steel options are ideal for resisting adhesive buildup, and stainless steel can be further polished to improve its resistance.

• How do I prevent Wilden AODD pumps from stalling when handling viscous sealants?

  Wilden AODD pumps feature an unbalanced pilot spool, which helps minimize the risk of stalling. To further reduce the risk of stalling, ensure the pump is run at air pressure above 20 psig and with sufficient air volume for the desired flow rate, as described in the pump’s performance curve.

• How do I clean a Wilden AODD pump after pumping fast-setting adhesives or glue?

  To make cleaning an AODD pump after handling quick-drying glue easier, select a clamped pump design. The clamped configuration makes sealant-handling diaphragm pumps easy to disassemble and clean. The design allows for quicker disassembly than the bolted pump configurations, enabling operators to clean the pump before the glue has time to set.