BERNARD CONTROLS Home Our solutions Labels & product ranges SQX range SQX RANGE Explosionproof quarter-turn SQX actuators are certified for use in explosive atmosphere according to main international standards, adaptable to the specifications of engineering companies and have been designed to offer increased security and reliability to your installation. PRODUCT SPECIFICATIONS TORQUE RANGE 80 to 800 Nm (direct) Up to 1,000,000 Nm on request COMPLIANCE WITH INTERNATIONAL EXPLOSION-PROOF STANDARDS: ATEX, INMETRO, IEC-EX, EAC-EX, NEMA 7 & 9... TYPE OF CONTROLS: Electromechanical SWITCH Hardwired Smart INTELLI+® (v2) SIL2 BC DUTY & MODULATING CLASSIFICATION: On-Off: Class A+ Inching / Positioning: Class B+ Modulating: Class III ENVIRONMENT: IP 68 / C3 UP TO C5-M / T: -20°C ...+70°C (OPTION LOW T: -60°C) SPECIAL CONFIGURATIONS: CORROSION PROTECTION, FIRE PROOFING, EXTREME TEMPERATURES PRODUCTS BENEFITS Asynchronous motor with high starting torque & S4 Service duty Gears are self-locking Non-rotative declutch-free handwheel with electric motor priority INTELLI+® integrated control available: advanced control solution for your critical applications Double sealing Partial stroke test (PST) included Programmable timer Separated control box & LCS available Wide range of fieldbus available SIL certification as an option Legal notices Contacts Site map Join our team Cookies Data protection charter @ BERNARD CONTROLS 2017 We use cookies to improve the performance of this site and offer you a better browsing experience. Click here for more information on our cookies policy and how to manage them. I AGREE

BERNARD CONTROLS Home Our solutions BC technologies Manual override MANUAL OVERRIDE EASY MAINTENANCE WITH BERNARD CONTROLS MANUAL OVERRIDE TECHNOLOGY Depending on the markets and types of facilities, the features of emergency manual control, key functions of the actuator, can be very different. However, several features have a prime significance. Manual override specifications: Manual override with electrical priority is required in most of the technical specifications. However, the following two principles must be adhered to: it must be possible to operate the handwheel at any time the number of turns on the handwheel must not be too high. Example 1 : On a pressurized steam circuit, the valve closes on torque. When the torque is high, the use of a dog coupling is not safe enough as the force to be applied to the clutch lever for switching to manual mode is high. Example 2: Depending on the technology used, the number of turns on the handwheel can vary from 30 to more than 500 turns, in order to drive a DN500 quarter-turn valve with a torque of approximately 2500 Nm. Thus, the stacking of reduction gears can inhibit the safety function of the manual control. In conclusion, there is not one solution for all the applications but different techniques adapted to the real needs. Legal notices Contacts Site map Join our team Cookies Data protection charter @ BERNARD CONTROLS 2017 We use cookies to improve the performance of this site and offer you a better browsing experience. Click here for more information on our cookies policy and how to manage them. I AGREE