Dual-Plate Wafer Check Valves
Hi-Flow are stocking Low Temperature Carbon Steel (LCC) and 316 Stainless Steel (CF8M) valves, all with 316 Stainless Steel Seats and Trim, and Inconel X-750 springs.
Initially, Raised face Wafer Flangeless Valves will be held, with LCC available up to Class 600, and CF8M up to Class 300. A stock list will is available on the Hi-Flow website. Other designs, such as RTJ ends, seat materials and pressure ratings are available to be manufactured upon request, while the “ready made” range is expanded.
These can include Metal or Soft seats, allowing a wide range of material choices to suit most applications for which this type of valve would be selected.
Check Valves are used to stop the reverse flow of fluids. Original Types included the full-sized Swing Check valve and over time, the need to reduce weight in installation, and to minimise the space taken by a valve, resulted in the development of the Wafer Check Valve design.
The basic design of Wafer Check Valves has been used for many years, and as the needs of the industry have changed, so has the Valve design. Original designs used external fixtures to allow access to the internal trim parts of the valve, leaving a potential path for media to escape from the valve.
With growing global concern about pollution and the environment, and the resulting governmental legislation becoming more pressing in recent years, the desire to remove the external fixtures on the valve, to eliminate leak paths, has produced the “retainerless” pattern. The standard retainerless design used on the Saxon valve eliminates the possibility of Fugitive Emissions to atmosphere through the valve body, successfully addressing the important questions of “Safety” and “Environmental Issues”, which are foremost in the considerations of any Plant operator.
The “end-entry” design on valves up to 4 inch, similar to that used on many Ball Valves, makes maintenance simple, requiring no special tools. On larger sizes, cartridge assemblies carry the trim and sealing parts, securely located completely on the inside of the valve.
Fully compliant with API 594, the simple and effective design of Saxon Wafer Check Valves means that they can be fitted to a newly designed or existing plant as required. As a result of the relatively small size of the valve, it is cost effective in terms of purchase, installation, and operating costs.
Saxon Valves are manufactured and tested under systems accredited by TÜV Rheinland, including ISO 9001(2000). They are CE marked and approved in compliance with the Pressure Equipment Directive 97/23/EC, EC Design Module B1 and Module D/D1, also through TÜV Rheinland.
The name Saxon was chosen as it is easy to remember, and reflects the ancient British tribes that inhabited the area around Mildenhall in Suffolk, where the Valves are stocked. The first Saxon Wafer Check Valves are ready for supply from stock now.
For more information on the Saxon Wafer Check Valve, please download the PDF brochure on the Hi-Flow website, or contact Hi-Flow Valves on:
Telephone: 01638 711500
Fax: 01638 711521
Published in Valve User Magazine Issue 10
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