Abstract
Samson Controls Valve Booster
A new design of booster which eliminates the time-consuming trial and error
procedures associated with the fine tuning of control valves is available from valve
specialists Samson Controls
As the booster is completely pressure balanced, Samson Controls claims that it provides a stable output, even under fluctuating pressure conditions. The signal pressure is transmitted with a defined hysteresis, without loss (gain 1:1) and emits minimal noise. Another important benefit is that only the booster’s functional parts come into contact with instrument air; alternatively, the booster’s exhaust air port can be protected from the weather or other environmental factors.
When used in combination with a positioner, the booster allows control valves with large pneumatic actuators to be controlled quickly and precisely, even in applications with high flow rates or significant pressure drops.
Samson Controls Ltd
John Middleton, 01737 766391,
Rittal’s New Free-Standing SE 8 Enclosure
Rittal’s new free-standing enclosure the SE 8 is a standardised system with features that can be assembled efficiently. Keeping the costs of engineering and handling in check, free-standing enclosures are used in many areas of industry and in building services management. Typical fields of application are compact machinery and equipment, whose power distribution and automation components can be accommodated in one single enclosure.
Unlike baying suites with frames and removable side panels, the body of Rittal’s SE 8 consists of two side panels and a roof made from one piece of sheet steel. For the user, this means that both handling and installation of separate side panels are eliminated.
Depending on size, SE 8 enclosures are available as one- or two-door models. One particular advantage is that due to the absence of a centre bar, doors can overlap and the 1800 mm wide, two-door system enclosures offer unimpeded access to complete mounting plates and switch panels. Rittal claims that the SE 8 offers major potential savings, especially, in the larger widths. One single enclosure can thus be used instead of two or three bayed ones.
Rittal Limited
John Wilkins, 01709 704000,
E2S’s Robust Metal-Bodied Sounders and Beacons
For use in harsh environments where high temperatures, shock and vibration or high ultraviolet (UV) levels are anticipated, E2S has introduced the new D range of alarm sounders and combined sounder/beacon warning signals. Using the electronics of its well-established A Series, the D range is housed in a robust, corrosion resistant LM6 aluminium alloy enclosure, giving what E2S claims is greater mechanical, temperature and UV protection than an equivalent plastic bodied device. The D105 is rated at 112 dB @ 1 m and the D112 at 117 dB @ 1 m; both types are also available combined with a xenon strobe or light emitting diode (LED) beacon to generate both an audible and visual alarm from a single unit.
Testing has proven that a metal housing offers far greater protection at elevated temperatures than a plastic enclosure and is especially suited to outdoor applications such as mining conveyors where high ambient temperatures and sustained vibration can be experienced.
European Safety Systems Limited
+ 44 (0)20 8743 8880,
Kistler’s High Speed Torque Sensor
As rotational speeds increase, electric motor and generator manufacturers need a reliable and versatile method of measuring torque accurately for both product development and quality control in production and assembly applications. To meet this need, Kistler designed the Type 4503A torque sensor to provide a flexible instrument for use at rotational speeds of up to 50,000 rpm with a choice of 14 measuring ranges from 0.2 to 5000 N m.
Additional benefits are two, switchable ranges, with the second range being either 1:10 or 1:5 of the rated torque, integral digital signal conditioning providing both analogue and digital outputs, contactless signal and power transmission and a speed sensor output of up to 360 pulses per revolution.
The option of two switchable ranges allows precise measurement of both peak and operating torque with the same sensor. In applications with a high peak but moderate operating torque, a sensor with only one measuring range would have to be selected to withstand the peak torque which would compromise measurement accuracy at the lower operating torque.
Kistler Instruments Limited
01256 741550,