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New generation diaphragm valve with twice the flow

Supplier: Georg Fischer Piping Systems By: Jillian Simpson
19 April, 2010

Georg Fischer Piping Systems launched their new generation of diaphragm valves worldwide on April 6.

The new diaphragm valves have decisive advantages not only in handling and safety, but especially in regard to efficiency. The flow in these new valves is on average double that of conventional diaphragm valves. In addition, the central plastic thread, which is used instead of the usual four metal screws, guarantees a corrosion-resistant connection.
 
Not apparent at first glance, but equally important is the more homogenous thermal expansion behavior achieved by the central plastic thread, which eliminates the need for retightening. The central thread ensures a consistent seat pressure, guaranteeing leak-tightness up to an operating pressure of 16 bar.

New flow contour of the diaphragm valves
The real technological advances of the new generation of diaphragm valves are actually located on the inside. Thanks to the optimized, turbulence-free flow contour the KV value has been doubled. The rounded contours with soft transitions and radii mean less abrasion and noise transmission, which adds comfort to daily use. The modified geometry of the valve body results in linear control characteristics – and therefore also consistently stable processes.

How the design affects the flow rate of the diaphragm valves can be seen in an independent comparison in which the new diaphragm valves from GF Piping Systems were tested against conventional diaphragm valves. 100% more flow was achieved on average with the optimized, turbulence-free flow contour. And this contributes finally to the economic efficiency of the diaphragm valves with lower running costs and the lower overall cost for media transport.

Material diversity and guaranteed compatibility
A large variety of materials warrant that the valves are compatible with the processes they are used in, thus ensuring safety. Valve bodies are available in PVC-U, PVC-C, ABS as well as PP-H, PP-n and PVDF, membranes in EPDM, PTFE, FPM and NBR.

This range of materials covers the entire spectrum of chemicals with which the diaphragm valves can come into contact. So it makes no difference what type of media needs to be conveyed. From extremely contaminated or solid containing to highly pure media, from the chemical process industry to microelectronics or water treatment, from cooling to control applications, everything is now possible.

The large diversity of connection options means that the valves can be used universally. Compatibility to the global standards for connections; ISO, BS, ASTM, ANSI and JIS, as well as the prEN ISO 16138, ISO9393 or EN558 standards have all been taken into consideration.

Outer dimensions and connecting dimensions have not been changed from the preceding models. All the new valves are therefore backward compatible and can be built into existing pipelines.

Design diversity
Standard versions of the diaphragm valves are operated manually via an integrated lockable handwheel, which protects against inadvertent manipulation. An optional self-adjusting electrical feedback unit, installed in just a few simple steps, enables automatic control and regulation of piping systems, as well as reliable process monitoring.

Automation of the valves is possible with the pneumatic valve actuator Diastar. Thanks to the three different pressure categories – Diastar 6, Diastar 10 and Diastar 16 – with operating pressures of 6, 10 and 16 bar respectively. The pneumatically actuated diaphragm valves are quickly and easily integrated into nearly all piping systems.

Integrating the valves into system control is no problem with the corresponding interfaces and the wide array of accessories, so individual solutions are always possible.

For further information on the new generation Diaphragm Valve please call our office on 1300 130 149 or visit our web site at www.georgefischer.com.au.