Vulkan Couplings Launches New Product

(Press Release)
Friday, June 08, 2012

VULKAN Couplings has supplemented the range of the enhanced performance ACOTEC couplings with the RATO DG +.


The drive specialist, based in Herne, is launching the first size of the new product, and presenting it for the first time at POWER-GEN 2012, from 12th to 14th June 2012 in Cologne

The proven RATO DG coupling has been developed especially for rigidly installed diesel, gas and electric motors with the requirement of medium rotational and displacement flexibility. The available stiffnesses enable a customized tuning of the system with respect to both the transient and steady-state torsional vibration response. In the tradition of VULKAN couplings , a backlash-free torque transmission is achieved. This leads to an exact torque transfer (important for governor stability) during the loading/unloading of the coupling. The absence of a torque-limiting device in the coupling protects the connected machinery from the effects of shock loads, e. g. short circuits.

VULKAN Couplings has continued the success of the ACOTEC range with the launch of the RATO DG +. The newly developed ACOTEC products are characterised by enhanced performance with regard to the technical specifications. The proven construction principle of the standard RATO DG has been optimised yet again, and in conjunction with the innovative compound and vulcanisation and test technology, it has undergone advanced development to obtain the enhanced performance DG + design. There is a substantial commercial benefit accompanying this performance enhancement: The RATO DG + replaces the next larger size of the conventional RATO DG.

A decisive benefit of the RATO DG +, when compared with couplings with elastomer bodies subjected to pressure loads that are used in similar applications, is the linear torsional stiffness characteristic, which enables safe design of the coupling on account of the defined stiffness independent of the operating condition. The cross-section of the RATO DG + permits excellent ventilation of the coupling and ensures the maximum possible thermal load capacity.

VULKAN Couplings is launching the new RATO DG + type of coupling in size 3D1X with a nominal torque of TkN = 50 kNm. This design of the coupling has already been approved by MWM for series production of its gas motor, TCG 2032. This motor of the MWM range, with the best performance at present, is being deployed successfully in gensets of large IPP projects. At present, it has a capacity of 4,300 kW. In addition, the RATO DG + has been certified by all leading international classification agencies.

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