PC pumps are a unique type of positive displacement pump, capable of handling an array of fluids from clean, water-like liquids and shear-sensitive products to highly viscous fluids such as adhesives and sealants. The design of the PC pump differentiates it from other types of positive-displacement pumps, resulting in high-performance features that enable PC pumps to outperform their counterparts in a range of applications.
PC pumps are effective in handling adhesive and sealant applications, as they are designed to provide low shear rates; have the ability to handle abrasive, high-viscosity fluids; and deliver a predictable, non-pulsating flow. The dependable, highly efficient PC pump also has the ability to lift fluids up to 28 feet, pump fluids over a wide viscosity range and can handle fluid temperatures as high as 500
Moyno Inc., a unit of Robbins & Myers Inc., is a leading manufacturer of progressing cavity pumps, having served the needs of the adhesives and sealants industry since 1936. The company has developed a new high-performance process pump for demanding applications.
Designed for highly viscous, abrasive, corrosive or high-temperature applications, the Moyno® PowerFlowTM pump outperforms alternative positive displacement pumps when handling adhesives and sealants, offering significant advantages in terms of versatility in application, performance, longevity, and efficiency.
This PC pump incorporates hardened tool steel or hardened 17-4 pH stainless steel rotor and stator pumping elements, which replace the typical metal rotor and elastomeric stator combination normally associated with a PC pump. The required precision fit of the pumping elements was only made possible by the recent development of new, proprietary manufacturing process capabilities that ensure higher stator profile tolerances for increased pumping efficiency. The ability to maintain the required tight metal-to-metal profile tolerances also enables the pump to effectively handle thin, water-like liquids as effectively as viscous fluids, enhancing its application versatility.
Traditionally, the stator of a progressing cavity pump is constructed of an elastomer. While offered in a variety of elastomeric materials, the application of the PC pump remained limited in some applications by the compatibility of the fluids being pumped with the elastomeric material of the stator. All-metal pumping elements like those offered in the Moyno PowerFlow make the PC pump ideal for applications where heat, chemical or solvent compatibility with an elastomer is a problem.
The advantages of metal pumping elements are considerable for adhesive and sealant applications. Elastomeric stators do not permit PC pumps to handle the higher temperatures and pressures that the metal-to-metal pumping elements can, nor are they able to provide the broader material capability that the all-metal PC pumps can provide. This new generation of PC pump is not only powerful enough to generate flow under any combination of high pressure, high temperature and high chemical resistance, but it also retains the low-shear feature of the progressing cavity design. The low-shear feature allows this PC pump to effectively handle adhesives, fillers or additives that are shear sensitive, minimizing foaming and product degradation.
The close tolerance, all-metal pumping elements take much of the credit for allowing a PC pump like the PowerFlow to handle high-viscosity fluids and high-pressure conditions such as those found in the adhesives and sealants industry. Handling temperatures for grades of hot-melt adhesives can range to 400
Recent advancements in PC technology and manufacturing capability enhancements have resulted in an advanced line of PC pumps that use close-tolerance, metal-to-metal pumping elements to extend compatibility with a broader range of adhesives, sealants, additives, fillers, and solvents. These new designs also increase the temperature range of the adhesives and sealants that can be handled to 500
For more information on pumping equipment, contact Moyno Inc., PO Box 960, Springfield, Ohio 45501; phone (877) 486-6966; fax (937) 327-3572; or e-mail email@example.com .