How does a steam jet ejector work?

In a jet or ejector, a relatively high-pressure gas, like steam or air, expands through a nozzle. The steam or air converts that pressure or potential energy to velocity or kinetic energy. The jet of high-velocity steam or gas entrains the gas to be evacuated or pumped in the suction of the ejector.

What is the purpose of ejector?

The purpose of the ejector is to transport and compress a weight of induced fluid from the suction pressure to the exit pressure. By staging ejectors it is possible to obtain a very large range of suction pressures from atmospheric down to as low as one micron of mercury absolute.

What are the advantages of ejector over vacuum pump?

An ejector pump ejects vapor or steam, such as an oil diffusion pump. A steam ejector pump is one of the most versatile vacuum pumps in industrial ways. Its advantages over mechanical vacuum pumps are durability, low cost, and more. This article picks an oil ejector pump up.

What is water ejector?

Water ejectors are vacuum pumps, driven by a high pressure water (or similar medium) or steam. They use kinetic energy of the driving medium to suck in gases, vapors or other liquids and then discharge the resultant mixture against a counter pressure.

How do steam systems work?

In steam heating systems, a boiler furnace heats water by means of a gas or oil-fired burner and turns it into steam. The steam travels through pipes to radiators or convectors, which give off heat and warm the room. As the steam cools, it condenses back into water, and returns to the boiler to be heated again.

What is the difference between ejector and vacuum pump?

The steam ejector pump works by water vapor fluid. It has lesser moving parts than the mechanical vacuum pump, so more durable and cheaper. The water ejector pump works by water fluid. This pump doesn’t work without other combination pumps such as oil rotary vacuum pumps and so on.

Is the water ejector pump a reliable evacuation device?

The water ejector pump system is a stable and reliable evacuation device. The water jet vacuum pump is suitable for various process occasions such as distillation, concentration, drying, absorption, mass transfer, and sewage biochemical treatment.

Can a steam ejector be used to pump liquid?

Steam ejectors are also suitable for pumping many liquids since if the steam can be easily condensed into the liquid then there is no need to separate the working fluid or manage a mist of liquid droplets. This is the manner in which a steam injector operates. Commonly called an air ejector, Venturi pump, or vacuum ejector.

Can a vacuum ejector be used in a sewer?

However, they are water-intensive, and depending on what the vacuum is being used for (e.g. solvent removal), they can violate environmental protection laws such as the RCRA by mixing potentially hazardous chemicals into the water stream, then flushing them down a drain that often leads directly to the municipal sewer.

When to use an automatic water jet eductor?

Fig. 2645 Automatic Water Jet Eductors are used to pump out sumps (pits, tanks, etc.) where liquid accumulates slowly but must be evacuated when it reaches a predetermined level. Operation of the Fig. 2645 Automatic Water Jet Eductor requires no electrical connections or external power other than motive fluid.