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Phoenix Mecano’s Rose fiberglass EX watertight safety enclosure is a modified version of the company’s standard fiberglass watertight enclosure. Carbon has been added to the material to reduce surface conductivity to almost zero. The enclosure is offered in three types: increased safety, intrinsic safety, and empty. It is designed for use in hazardous environments where increased safety and intrinsic safety enclosures are allowed. Each enclosure includes a fiberglass lid and base, captive stainless steel lid screws, and a silicone gasket.
DIAB International has designed an alternative to the insulated steel enclosures typically used for noise reduction around working equipment such as pumps, motors, and machinery on offshore platforms. A steel enclosure can weigh more than 20,000 lbs. A noise enclosure made of composite material weighs in at half that weight, the company said. To surround the equipment, custom-sized panels are bolted together and mounted to the platform floor in a steel frame. The company reported noise reductions from 114 dB inside an enclosure to below 70 dB outside of the enclosure.
Motors are designed with certain speed-torque characteristics to match speed-torque requirements of various loads. A motor must be able to develop enough torque to start, accelerate, and operate a load at rated speed. The National Electrical Manufacturers Association (NEMA) has established class designations for motors on the basis of motors' starting-torque and accelerating loads. The four standard NEMA designs are NEMA A, NEMA B, NEMA C, and NEMA D. NEMA A motors usually are used for applications that require extremely high efficiency and extremely high full-load speed. NEMA A-design motors are special and are not used very often.