Liquid Ring Vacuum Pumps - Roots Pumps - Air Ejectors - Dry Screw Vacuum Pumps - Rotary Vane Vacuum Pumps - Pumping Station

Pumping Station

The heart of Arpuma's business involves the design and project planning of plug and play vacuum systems for special applications in the process industry. Jointly with our customers we review the process and recommend the vacuum pump or vacuum pump combination which in our opinion best suits our customer's needs in each case. For the design of the vacuum systems, EDP supported programs are being constantly further developed. These programs together with the experience of our project engineers are the basis for our precisely tailor-made solutions. Standard regulations like RL 94/9/EG (ATEX), TA Luft (German Clean Air Act) , AD 2000 or also ASME, etc. are of course observed and worked off in full during the planning process. Measurement and control engineering, fittings according to customer specifications or recommended by us as well as the manufacture of vessels, piping and steel constructions, complete our systems.

Design drawings are drawn up by our engineering department in three-dimensional views and made available to our customers by way of common file formats. All vacuum systems like Roots vacuum pump systems and package units, for example, are manufactured in our own production facilities. Before delivery, our products are subjected to extensive test runs for the purpose of ensuring their quality. The test logs are part of the documentation in accordance with the Machinery Directive.

Below you will find examples of some of Arpuma's industrial installations

Process: Drying process in the foodstuff industry

Execution: Exhaust vapour condenser with a condensation power up to 1500 kW including condensate collecting vessel of 2500 l and weighing system. Two-stage liquid ring vacuum pump with a rated drive capacity of 15 kW as a package unit with a vacuum controller for fully automatic operation. All system components in contact with the product are made of stainless steel.

Special features: Redundant implementation (2 x 100 %) for utmost process reliability.
   

Process: Vacuum generation for a distillation column

Execution : Two-stage liquid ring vacuum pump with external operating liquid circuit. Three units each with a rated drive capacity of 45 kW have been combined in a module whereby one each module serves a distillation column. Equipped for fully automatic operation in ATEX zone 1/ 2 G II B T4 and TA Luft (German Clean Air Act) compliant. Shaft seal through double-acting axial face seal with independent sealing system.

Special features: Energy saving through speed controlled vacuum generation via frequency converter.
   

Process: Polycondensation process in plastic flakes processing at an operating pressure below 1 mbar abs.

Execution: Three-stage Roots pump system with liquid ring vacuum pump as the backing pump. Pumping speed of the combination is 9860 m³/h at 1 mbar abs., the attainable ultimate vacuum 0.15 mbar abs. approx.

Special features: Cleaning of the Root pumps during running operation. Seal gas protected gearboxes. Pressure control through motors driven by frequency converters.
   

Process: Counterflow column for methanol removal from biodiesel to a residual content of less than 0.7 % by weight.

Execution: Counterflow column with closed inert gas circuit whereby the carrier gas is conveyed by a single-stage liquid ring vacuum pump. The methanol is recovered in condensers both on the intake and also on the discharge side of the vacuum pump. A heat exchanger for heat recovery has been installed at the biodiesel inlet and discharge. Plug and play scalable skid with complete measurement and control facilities for a product flow of up to 12,000 kg/h crude oil.

Special features: Engineering and manufacture of the complete unit including column, vessels, heat recovery system, etc. by Arpuma.
   

Process: Extruder degassing at an operating pressure below 1 mbar abs.

Execution: Three-stage Roots pump system with a liquid ring vacuum pump as the backing pump which is operated in a closed operating liquid cycle. Tube-bank heat exchanger in redundant implementation for higher operational reliability. Intake volume flow of the combination of up to 2x 20,000 = 40,000 m³/h.

Special features: The Roots vacuum pumps of the first and the second intake stage consist of the same type of pump. The necessary grading between the pumps is attained through frequency converters. Due to the pumping concept, warehousing of spare parts is significantly simplified and the second stage is more rugged due to the necessarily reduced speed
   

Process: Evacuation of a furnace for sintered ceramics to an operating pressure of approximately 0.1 mbar abs..

Execution:Four-stage implementation of the pump system for attaining an ultimate pressure of 3 x 10-3 mbar abs. System with S7 PLC for autonomous operation of the vacuum generating section, constant process monitoring, automatic cut-in and shut-off of the pumps depending on demand.

Special features: Redundant implementation for maximum process reliability. Grading between the pumps so that the gas is warmed as little as possible. Temperature of the taken in gas at the furnace: 1400 °C!
   

Process: Drying of active substance concentrate in the pharmaceutical industry

Execution: Three-stage Roots vacuum pump system with liquid ring vacuum pump as the backing pump. Pumping speed of the combination 6,950 m³/h at 1 mbar [abs.], attainable ultimate vacuum < 0.1 mbar [abs], installed drive capacity of 29.5 kW in total. System designed for continuous operation over 8,800 hours per year. Fully automatic operation with numerous diagnosis facilities.

Special features: Cleaning of the Roots pumps during running operation. Seal gas protected gearboxes. Pressure control through motors operated by frequency converters.
   

Process: Vacuum station for standards compliant extraction of the residual water in dishwashers and washing machines before shipping. Here utmost process reliability is demanded so as not to compromise the short cycles in Production.

Execution: Single-stage liquid ring vacuum pump with closed operating water circuit. The pump takes in the operating liquid exclusively from the process so that no additional water is needed to cool the pump. In a pre-separator system, the taken in quantity of water is evaluated by the PLC. After the measurement, the water is compressed via the vacuum pump to atmospheric pressure and discharged into the sewage system. The units are equipped complete with a controller which communicates with the higher-level PLC. All materials in contact with the product are made of stainless steel, respectively PVC.

Special features: The liquid ring vacuum pumps of the type AG exhibit a very high degree of water tolerance on the intake side whilst maintaining the overall pumping speed at a constant level.