Innovation
Many Cornell innovations have evolved from their commitment to the industrial refrigeration marketplace and our ongoing effort to work with the industry in providing solutions for liquid overfeed and transfer applications
Refrigerant Emission FreeTM
Sealing TechnologyRefrigerant Emission FreeTM Sealing Technology is a highly reliable, proven system consisting of a carefully optimized double mechanical seal, a pressurized self contained barrier fluid reservoir, and integral low level monitor with a safety shut down feature. The inboard seal prevents escape of refrigerant from the pump casing ; while the outboard seal acts as a fail-safe or backup and provides containment of the system compatible barrier fluid.
Net Positive Suction Head Required (NPSHR)
Cornell recognizes the requirement for exceptional NPSHR characteristics in today's liquid overfeed systems. We know what's at stake when a pump cavities due to poor NPSHR. NPSHR characteristics less than two feet are commonplace for Cornell refrigerant pumps. The extremely low NPSHR characteristics of all Cornell refrigerant pumps. The extremely low NPSHR characteristics of all Cornell refrigerant pumps are derived from hydraulics designed specifically for saturated refrigerant applications. Performance is further enhanced throughout the entire operating range of all Cornell close coupled refrigerant pumps due to the single stage impeller and four or six operation speeds.
Vapor Entrainment
The Refrigerant Emission FreeTM Sealing Technology provides the end user with an operating environment free of problems associated with "nuisance-tripping" and refrigerant bearings. Since the seals are lubricated via the self contained barrier fluid system, they do not rely on the presence of pumpage for lubrication or cooling. It is common with many systems that pressure transients in the receiver can cause pumps to lose prime due to vapor locking. With the double mechanical sealing system, the pump can container to run until the system stabilizers and the pump reprimes itself. Q-max and Q-min control orifices, differential pressure stats, and pump controllers are not required.