FLENDER Standard Couplings Torsionally Rigid All-Steel Couplings — ARPEX ARP-6 Series © Siemens AG 2015 General information ■ Overview Coupling can be used in potentially explosive atmospheres in accordance with the current ATEX Directive. ■ Benefits ARPEX couplings of the ARP-6 series are outstanding for their application-optimized construction. The two types NAN and MCECM have been specially designed for drives with uniform to medium loads and at the same time meet the requirements of API 610. The type MCECM with preassembled CEC intermedi- ate unit can also be optionally designed to API 671. A special catcher device serves to secure the intermediate spacer in the event of plate breakage.
Their use in potentially explosive atmo- spheres in accordance with the current ATEX Directive is possi- ble. 6 ■ Application ARPEX series ARP-6 couplings have been specially developed for pump drives and specifically for centrifugal pump drives. Special care was taken to meet the requirements of API 610 and API 671 (API = American Petroleum Institute). Power is transmit- ted via close-fitting bolts and nuts from size 310-6 with conical screw connection and plate packs in hexagonal design. Torques of between 100 and 17000 Nm can be transmitted at a permitted angular misalignment of 0.7°. The closed flange shape and a compact construction permit high peripheral speeds and high speeds.
The intermediate spacer can be fitted radially without moving the connected units. Main areas of application for the ARP-6 series: • Centrifugal pumps • Boiler feed pumps • Propeller pumps • Wing pumps • Pipeline pumps • Turbo compressors • Screw compressors • Turbo blowers • Axial, radial blowers • Rotary-piston blowers • Fans 6/37 Siemens MD 10.1 · 2015