Simple and multi-functional design helps lower installation and service costs
Danfoss’ new oil-free check (OFC) valve brings even greater functionality and efficiency to Danfoss Turbocor® compressors. Designed specifically for an oil-free environment, the valve delivers a discharge solution that improves the performance and reliability of oil-free centrifugal compressors with magnetic bearings by incorporating a low pressure drop damped check valve, as well as stop and diffuser functions.
Because the oil management system can be removed when using the OFC valve, the Turbocor compressor allows for a more energy efficient chiller that will last throughout the lifetime of the compressor with minimal maintenance and no performance degradation. The OFC valve enhances these Turbocor-based chillers by reducing discharge pressure drop, while increasing capacity and efficiency. The OFC simplifies the manufacturing of the chiller by combining multiple functions into one and by providing a flanged connection for easy installation to the condenser heat exchanger.
The Danfoss OFC valve is unique in that it combines multiple functions into one by incorporating both a ball valve style shut-off and the check valve needed to protect the compressor during start up. The check valve itself has a very low pressure drop, frequently less than 1 psi depending on the flow, which is significantly lower than other check valves, ensuring unparalleled smooth operation without chattering at start-up and backflow at shutdown. The low pressure drop also leads to increased chiller efficiency and, ultimately, lower installation and service costs associated with the valve.
Some of the typical applications in which the OFC valve can be used include:
- Air-Cooled Chiller
- Water-Cooled Chiller
- Water-to-Water Heat Pump
- Air-to-Water Heat Pump
“The OFC valve stands out in the market because it has been designed with features that make it easier to use compared to similar products,” said Brian Dail, application engineering manager at Danfoss. “Its design simplicity is setting a new precedent for the industry, and it also introduces a new benchmark for efficiency.”