What is the purpose of a steam ejector?

The main function of the ejector is to extract air and no condensate gasses from a closed system . It removes air from the condenser and provide vacuum. The amount of air extracted at the time of starting is more as compared to running unit.

What is the purpose of an 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 is the difference between injector and ejector?

Ejectors are used for mixing liquid and solid products with a liquid (often water or steam). Injectors are used to increase the temperature of a liquid.

How many types of ejector systems are there?

Ejectors are generally categorized into one of four basic types: single-stage, multi-stage non-condensing, multi-stage condensing and multi-stage with both condensing and non-condensing stages. Single-stage ejectors are the simplest and most commonly used construction.

How does a steam vacuum system work?

They called these old systems “Vapor/Vacuum,” and the principle that made them work was a simple one: At very low pressure,steam takes up about1,700 times more space than water. When that steam condenses, it will create a vacuum if air can’t get back into the system. The old-timers let the steam expand naturally.

How many types of ejectors are there?

Why does my ejector pit smell?

A strong sewer smell coming from your basement is most often caused from a dried out floor drain, a bad ejector pit seal, improperly vented appliances or fixtures, or even a damaged sewer line. Over time, that seal can open as the drain dries up (condensation, etc.)

How is water injected into a steam boiler?

What Are Injectors? They are a device which is used by crew to take water from the tender and combine it with live boiler steam and inject it into the boiler via a check valve. It is achieved by opening the steam and water valves in their correct order, they will pick up and inject the water into the boiler.

What is steam injector in boiler?

Steam injectors are used to inject live steam into feedtanks to drive off the dissolved oxygen. Maintaining high and consistent feedwater temperature to the steam boiler.

What are the primary parts of an ejector?

An ejector is a static piece of equipment with no moving parts (Figure 2). There are four major components to an ejector, the motive nozzle, motive chest, suction chamber and diffuser.

What are steam ejectors used for?

Steam Ejectors are used to pump out or eject as simple devices to eject vapours or liquids out of vessels, confined spaces difficult to reach spaces, Pits, and explosive atmospheres. It is a venturi tube .

How does a gas 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 function of the second stage ejector?

The second stage ejector handles the non condensate gasses of first stage ejector and through a vent opening to the atmosphere. The air flow can be measured by the rota-meter. The condensate water of steam send back to re use through steam traps.

When is a steam ejector of critical design?

A steam ejector is of critical design when the suction pressure is lower than approximately 55\% of the discharge pressure. Ejectors designed in the critical range are sensitive to operating conditions other than those the unit was designed for. The table below illustrates how these changes in operation can affect ejector performance: