Parker Instrumentation has launched a series of ball-cage check valves optimised for higher temperature applications requiring long service lifetimes. Fabricated in 316 stainless steel, the new CB Series check valve provides a simple means of adding protection in any system where back flow or pressure might cause a problem or damage. Integrity is assured by special features including a ball with a micro-finished surface for accurate resealing, a hardened cage using the Parker proprietary SuparCase treatment, and a range of seals including a material that is compatible with fuel oils and amines, and which resists coking. These attributes make the new valve suitable for demanding applications in power generation, chemical processing, and oil/gas production. A typical example application is as a high-integrity replacement for the fuel, oil or water check valves required in power generation turbines – which today are often replaced or refurbished every few months to combat leakage as a result of coking, and/or perishing of seals because of the aggressive media.