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Oil Lubricating
Or Oil Recirculating Vacuum Pump |
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Description :
Vac-Tec oil sealed rotary vane vacuum pumps are direct driven, single stage and air-cooled, These oil-lubricating / recirculating pumps has simplest design and are most reliable. As these pumps are very simple and rugged are used in a various industries such as packaging, for filling machine in pharmaceutical industries, jewelry casting, food processing, rubber molding, thermoforming, packing / testing & making printed circuit board, hospitals, robotics, laboratories, vacuum lamination, printing, and many others. |
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Attractive Features:
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Very easy to install.
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Compact, simple design and requires rare maintenance.
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Air-cooled requires no other cooling medium like water.
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Direct drive, eliminating belts and gears and ultimately maintenance.
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Oil mist eliminator for oil-free exhaust.
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Quiet operation, noise less than 73 db.
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Two Stage Rotary Vane (RV) Vacuum Pump |
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RV series vacuum pumps are two-stage and directly coupled with motor. These consists two stages one for high-pressure and another for low-pressure. Its suction port connects vacuum equipment and helps to intake or drain the gas in the container during operation. When the equipment is in vacuum, the drain valve of high-pressure stage will close, then, the gas suctioned by high-pressure stage will be transferred to the second stage, later, the gas will be suctioned and drained through the second stage, so that the equipment can obtain certain vacuum. The technical parameter of the pump is as per tables. The pump is coupled with motor, which is high-speed and small and compact and convenient for flexible operation. The RV pumps are used in labs, pharmaceutical industry, food packing and electronic industry. |
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Belt Driven Vacuum Pump |
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These also Rotary vane pumps. Only motor is installed separately. Available from 0.5 to 70 Cum / Hour |
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Root Pumps |
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VT Roots Vacuum Pumps :
Roots vacuum pump is characterized by higher pumping speed under lower inlet pressure. But it can't be used alone. It must be connected with a vacuum pump which serves as a backing pump. The roots vacuum pump begins to work only when the pressure in the pumped system is pumped by backing pump to the inlet pressure that the roots vacuum pump allows. Normally, roots vacuum pumps don't allow working under high pressure difference. Otherwise, they will get damaged as a result of overload and overheat. So choosing the right backing pump and installing certain protection guard is necessary.
Usually oil sealed mechanical pump and liquid ring vacuum pump can be chosen as the backing pump. Especially when pumping gases with a large amount of water vapour, water ring vacuum pump is the ideal choice.
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Operating Principle and Features :
The roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a constant speed inside the pump housing for suction and exhaust of gas. Two rotors are supported by two bearings and synchronized by a gear, which ensures these two rotors in certain relative positions. They are near to one another and to the housing without actual contacting, so lubrication is unnecessary in the working housing. The carefully balanced operating parts and high precision bevel wheels ensue the pump be operated stably and continuously under the condition of high-pressure difference. Dynamic seal part use our patent technology and imported oil seals, the vibration amount of shaft on the shaft seals is controlled to less than 0.02mm.
A gravity valve is installed between the suction and exhaust part of the pump. The function of the gravity valve is as follows, when the pressure difference between the suction and exhaust part is over the weight of the valve, the valve opens automatically, which makes the pressure difference always keep in a fixed controllable value, the value is the allowable highest pressure difference to ensure the pump work normally and so that in fact, the roots vacuum pump with overflow valve is a kind of overload self-protective pump.
The roots vacuum pump with overflow valve has substantially higher speed at relatively lower inlet pressure and it is possessed overload self-protective function. Because it is a pump of dry clearance seal construction, if a certain pumping speed rate and an ultimate vacuum need to be obtained, it is necessary to supply a lower inlet pressure for reducing the back flow, therefore, a pump must be backed in use, roots vacuum pump should be started soon after its inlet pressure reaches a permissible value for economization.
It is permit to select different kinds of pump as the backing pump for factual requirements, such as oil seal pump and liquid ring vacuum pump. When pumping the gas containing large amount of vapor, the liquid ring vacuum pump is the ideal backing pump. |
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