MacHu G.,Hoerbiger Ventilwerke GmbH and Co Kg |
MacHu G.,Hoerbiger UK Ltd
Sealing Technology | Year: 2011
This feature provides details of a new high-performance packing ring design that is characterised by both its high sealing efficiency and low wear rate. As this article shows, clarifying the thermo-physical processes in a pressure packing, gaining an understanding of the wear pattern of a packing ring and elucidating the factors governing the sealing efficiency of a packing ring have played key roles in the development of this design. © 2011 Elsevier Ltd.
Friedlaender O.,Rohol Aufsuchungs |
Mussig S.,Rohol Aufsuchungs |
Dolovai P.,Hoerbiger Ventilwerke GmbH and Co Kg
Oil Gas European Magazine | Year: 2014
RAG Rohöl-Aufsuchungs Aktiengesellschaft is Austria's oldest oil and gas exploration and production company. RAG operates besides the typical oils and gas production facilities a number of underground storages for natural gas, including the Haidach storage with a capacity of 2.6 billion m3 working gas near Salzburg. The gas flows of Haidach vary greatly over timescales of hours, weeks and months in both directions during injection and production of the gas. During cold winter periods the gas peak demand can exceed 1 million m3/h. Correspondingly very high volumes of gas need to be compressed and delivered to the market. The reliable delivery of the gas demand creates a technical challenge for the operating flexibility of the compressors. The Haidach compression site consists of four reciprocating compressors fitted with reverse flow step-less capacity control. With the existing compressor valves this allows an operating range of 20-100% of nominal flow rate, and gives corresponding energy savings. New high-performance compressor valves have extended the lower flow rate limit down to 10%, thus increasing the flexibility of the capacity control system. This article describes the successful application of an innovative fully electric capacity control system. Compared to the traditional hydraulic system it offers identical operational performance, but with much simpler installation and easier maintenance, and thus better economics for small compressors. The state-of-the-art condition monitoring system used in Haidach is designed specifically for reciprocating compressors. It allows alignment of maintenance schedules concurrently with periods of low compressor demand, as well as quick and reliable shutdown possibilities in the event of an unexpected compressor malfunction. © 2014 URBAN-VERLAG Hamburg/Wien GmbH.
Kluwick A.,Vienna University of Technology |
Kornfeld M.,Hoerbiger Ventilwerke GmbH and Co Kg
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences | Year: 2014
In this work, laminar transonic weakly three-dimensional flows at high Reynolds numbers in slender channels, as found in microsupersonic nozzles and turbomachines of micro-electromechanical systems, are considered. The channel height is taken so small that the viscous wall layers forming at the channel walls start to interact strongly rather than weakly with the inviscid core flow and, therefore, the classical boundary layer approach fails. The resulting viscous-inviscid interaction problem is formulated using matched asymptotic expansions and found to be governed by a triple-deck structure. As a consequence, the properties of the predominantly inviscid core region and the viscous wall layers have to be calculated simultaneously in the interaction region. Weakly three-dimensional effects caused by surface roughness, upstream propagating flow perturbations, boundary layer separation as well as bifurcating solutions are discussed. Representative results for subsonic as well as supersonic conditions are presented, and the importance of these flow phenomena in technical applications as, for example, a means to reduce shock losses through the use of deformed geometry is addressed. © 2014 The Author(s) Published by the Royal Society. All rights reserved.
Hoerbiger Ventilwerke GmbH, Co Kg and Hoerbiger Ventilwerke Aktiengesellschaft. | Date: 1992-08-25
compressors, machine parts for compressors; namely, pneumatically-operating valves for compressors and pumps, filters, mechanical condensation collectors, lubricators, mechanical control and output cylinders, hydraulic cylinders; clutches for machines and parts thereof. clutch and friction plates for land vehicles. repair and maintenance of compressor and pumps.
Hoerbiger Ventilwerke GmbH and Co Kg | Date: 1958-12-30
APPARATUS AND DEVICES FOR THE MANUFACTURE, CONTROL CONDUCTION AND UTILIZATION OF COMPRESSED FLUIDS, AND PARTS THEREFOR, PLATE VALVES FOR COMPRESSORS AND ALL KINDS OF AUTOMATIC PISTON TOOL MACHINES, REGULATION DEVICES FOR COMPRESSORS, WORKING CYLINDERS FOR COMPRESSED FLUIDS, THE CONTROL MECHANISM REQUIRED FOR THE CONTROL FOR OPERATION BY HAND, FOOT, CAM OR ELECTROMAGNETIC, AUXILIARY COMPRESSED AIR DEVICES-NAMELY, FILTERS, OILERS, REDUCING VALVES, THROTTLE VALVES, RETURN VALVES AND PARTS THEREFOR; CLUTCHES AND PARTS THEREFOR, CLUTCH PLATES AND TRACTION VEHICLES FOR ENGINE SERVICES.