Increased torque of N-Arpex all-steel disc coupling
14.10.2019
Flender N-Arpex couplings with 8 bolting points
Source: Flender
Flender is rounding off its range of N-Arpex couplings, first introduced in 2017, with two new designs featuring 8 and 10 bolting points. N-Arpex now covers a diameter up to 988 mm and a torque up to 2 000 000 Nm. The compact design and enhanced bore capacities also enable a leap in size. A smaller coupling transmits a higher torque compared to the predecessor model Arpex. Flender thus further optimises the price-performance ratio. The torsionally rigid all-steel disc coupling is suitable for use in drive applications including pumps, fans, compressors, and generators.
With the two new N-Arpex couplings, Flender has introduced a modular system which increases the number of available types as well as simultaneously reducing the number of components required. The three standard series of the predecessor Arpex merge into one N-Arpex series. This standardization simplifies storage, making the couplings more readily available and reducing spare parts complexity for the customer.
A new, more compact Flender conical bolt connection for the plate packs enable quick and easy installation of the N-Arpex couplings, especially in high torque ranges. This new addition enhances the power density of the N-Arpex series. The N-Arpex coupling plate packs are made of stainless spring steel, are not subject to wear and are therefore maintenance-free. The new series of couplings has also been designed for use in potentially explosive environments as defined in directive 2014/34/EU and fulfil the requirements of API610/ISO13709 and API671/ISO10441.
