Danfoss has launched OFC, a game-changing discharge solution for oil-free systems and heat pumps, which enhances the systems' reliability and efficiency.
The oil-free centrifugal market is growing exponentially around the world, driven by a need to reduce system running costs, complexity and system size.
The new Danfoss OFC check and stop valve incorporates a damped nozzle check valve, stop valves and diffuser function to address the major application pain points.
The nozzle check valve remains open at minimum flow, closes quickly if there is a system stop generating refrigerant backflow, and improves stability during surge, closing and opening for enhanced compressor reliability.
Decoupled stop and check functions allow fast access and improve reliability of sealing. The lock ring design prevents unintentional ball valve closes.
The OFC valve has a built-in sight glass that provides direct visibility of proper check valve functioning, and the built-in pressure port connects to a high pressure cut-out as an added safety measure.
Minimising pressure losses is critical to ensure optimum system efficiency. This is even more important at part-load conditions needed to meet the latest efficiency guidelines. Optimising the flow path within the valve improves flow capacity and reduces pressure drops by up to 70 per cent compared to using an alternative piston type valve, axial wafer valve or swing wafer.
Production planning is made much simpler as the OFC valve is an all-in-one solution.
There is no need to combine multiple components and store spare parts in inventory. Installation is fast and easy, allowing companies to start production quickly with shorter lead times.
The OFC valve can be set up in three positions - either vertically, horizontally or at a 45-degree angle - in order to optimise space and minimise piping.
The new OFC valve is compatible with the Danfoss portfolio of TT and TG Turbocorcompressors, according to Frank Ford, director of product management at Danfoss Turbocor.
“At Danfoss we are continually developing components for efficient oil-free systems,” he said.
“With the OFC check and stop valve, customers can avoid high pressure drops and unstable performance. Through our innovative approach we have patented the check valve design used in the centrifugal compressor discharge line.
“There is no other product on the market today that has the capabilities of our unique OFC check and stop valve.”
Victor Marinich, global segment director at Danfoss Air Conditioning, said the OFC check and stop valve is just the latest in a line of new products within our extensive oil-free portfolio.
“We will soon be introducing ETS 175/250/400/500 L electric expansion valves dedicated to oil-free and high temperature applications,” he said.
“They are complementing the recent releases within our portfolio of expansion valves and accessories such as the EKF stepper valve driver, the EKE 2U power module, and brand-new superheat controllers platform—EKE 100— which will be released in 2023. All that together support reliable, high-performance oil-free systems.”