81921719 Crouzet

Position detectors www.crouzet.com 21Pressure decay sensor 100 % pneumatic Also available in ATEX version for use in poten- tially explosive atmospheres in accordance with 94/9/EC Directive Pressure decay sensor 81 504 025 Symbol Characteristics Operating pressure bar 2 8 Flow at 6 bars NI/min 200 Tripping point b 0.3 with 6 bar supply Connection Sub-base page 54-55 Operating temperature C -5 +50 7 Mechanical life operations 10 25 Weight g Connections Without flow restrictor With flow restrictor Signal Signal when when cylinder cylinder is in is out 2 Principle of operation Evolution of pressure within a double-acting cylinder Fitted in-line between the cylinder and the Pressure control valve, the sensor will give an output in the cylinder when the pressure in this line is exhausted Circuit and the cylinder is at end of stroke. Working pres- pressure sure For the correct usage of sensors on a falling pressure, it is recommended that the practical cylinder load is limited to 60% of the theore- Operation of Pressure the sensor on a tical force. difference fall in pressure Exhaust pressure Cylinder Cylinder travel Time response time time Control valve Starting point End of stroke changeover of cylinder Dimensions 81 504 025 ATEX version products are available in the following catologues: Pneumatic products for explosive atmospheres or on our website www.crouzet.com www.crouzet.com 22