A new series of ball-cage check valves is optimised for higher temperature applications requiring long service lifetimes.

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 Parker's 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.

This can be a costly issue to deal with for dual-fuel power generation facilities that regularly switch between gas and oil, sometimes necessitating turbine shut downs.

Fabricated in 316 stainless steel, Parker's CB Series valves are available in 0.375, 0.5 and 0.75in sizes, and in straight or T shapes.

Users can select springs for crack pressure ratings spanning a 1 to 120lb/in2 range.

Users may also specify the valves for compatibility with existing systems or preferred installation practices by choosing from integrated single (CPI) or twin (A-Lok) ferrule compression tube fittings, or female NPT pipe thread connections.

The body shell will withstand pressures to 206bar.

Three types of seating material may be specified to suit the application's media and temperature requirements - PTFE, Parkerfill or Vespel - which are capable of operating up to 204, 260 or 288C, respectively.

Parker's proprietary Parkerfill material is compatible with fuel oils and amines (ammonia derivatives), and resists coking.

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