This first-stage ejector also helps minimize pump cavitation, as the pump no longer operates at low suction pressures, which could lead to vaporization of the seal liquid in the pump casing. The air ejector is installed at the suction of the vacum pump, thus boosting its suction pressure and thus reducing the capital-investment cost for this pump. This is actually a combination of an air jet ejector and a vacuum pump. Hybrid air ejectorsĪ new development in steam ejectors technology is the advent of hybrid air ejectors. High vacuum capability at high suction loads. Corrosion / erosion resistant as ejectors can be constructed from various materials so as to handle even corrosive fluids. Compact construction and easy installation. No moving parts, therefore maintenance costs can be kept low. Low investment costs compared to liquid ring vacuum pumps: no motor is necessary, no water-gas separator needs to be installed and no seal water cooler is required. The major advantages of steam ejectors are listed as follows: Steam consumption in multistage steam ejectors is relatively high as each stage must handle the load and motive steam of the stage ahead of it. Steam jet cooling systems are based on proven jet pump technology and often used to cool a liquid directly without any additional refrigerant by means of. These are widely used in heavy industrial such as condensing. Motive steam at high pressure and low velocity enters the inlet and exits at the design. Our Steam Jet Ejector Vacuum System are used for producing the steam through vacuum pump. Multi-stage ejectors are typically used when lower suction pressures are necessary. Steam ejectors make use of the venture principle to create a vacuum. Single-stage ejectors typically discharge at or near atmospheric pressure and are used for suction pressures ranging from atmospheric pressure to around 100 mbara. Steam ejectors are based on the ejector-venturi principal and operate by passing motive steam through an expanding nozzle. Multiple-nozzle designs, a Croll-Reynolds specialty, improve efficiency. There are basically two types of steam ejectors: single-stage and multi-stage. Steam ejectors handle high volumes of gasses, including wet, corrosive, or particulate-laden vapors, and operate in the rough or medium vacuum range, with operating pressures to 0.003 torr. Figure 1 - Typical steam ejector (single stage) Types if steam ejectors
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