Hadfield, Derbyshire (PRWeb UK) March 24, 2009
Chattering pressure regulators in hydraulic systems, particularly water glycol, could be a problem of the past, thanks to UK manufacturer Pressure Tech who has developed a version of its proven LF-690 regulator with seats and main valve tip in a new ceramic material which provides stable control and positive shut-off on liquids from 10-1000bar.
Valves used for high pressure liquid flow regulation essentially push one component into another, in this case the valve into the seat, to create a seal. One market-leading manufacturer puts a tungsten carbide ball between the valve and the seat, ensuring an excellent fit and continuous rotation of the ball tip, for longer life. However, the presence of the ball in the high pressure liquid flow of the seat cartridge can cause unstable resonance, or 'chattering' which can shear the connector pin.
What Pressure Tech has done is design a 'Shuttle Ball' held within a modified cartridge 'cup' so there is no unstable resonance. What's more, both ball and seat are ultra-hard ceramic.
MD Steve Robinson explains why the new Shuttle Ball product was developed: "When we approached companies in the oil and gas industry, they confirmed 'chattering' to be the most significant issue in our competitors' products. With this product we know we can outperform the market leader."
Because the ball and seat are ceramic, the valve has much better resistance to cavitation and erosion, as well as avoiding chattering. In fact, independent extreme tests (see Pressure Tech website), proved this material combination lasted more than five times longer than tungsten carbide. The combination of more effective design and more durable materials will reduce down-time and enable more precise control over considerably longer service life.
A combination of design features and market positioning mean that the Shuttle Ball ceramic version of the LF-690 regulator is available at a very competitive, price. First sales of the Shuttle Ball regulator have been to the UK and Norway.