Steam Admission Section

Steam Admission Section
Steam Admission Section

The steam admission section of a steam turbine is the part of the turbine where steam enters and begins to expand. It is typically located at the front of the turbine, and it consists of a series of nozzles that direct the steam onto the turbine blades.

The nozzles are designed to convert the pressure energy of the steam into kinetic energy. This kinetic energy is then used to drive the turbine blades and rotate the turbine shaft.

The steam admission section is a critical part of the steam turbine, and it must be designed carefully to ensure that the steam enters the turbine at the correct pressure and temperature. It is also important to ensure that the steam is distributed evenly to all of the turbine blades.

The steam admission section is typically made of a strong and durable material, such as stainless steel. It is also important to ensure that the steam admission section is well-insulated to prevent heat loss.

Here are some of the key components of the steam admission section:

  • Stop valves: The stop valves are used to control the flow of steam into the turbine. They are typically located at the inlet to the steam admission section.
  • Governor valves: The governor valves are used to control the speed of the turbine. They are located between the stop valves and the nozzles.
  • Nozzles: The nozzles are used to convert the pressure energy of the steam into kinetic energy. They are located at the outlet of the steam admission section.

The steam admission section is a critical part of the steam turbine, and it must be designed and maintained carefully to ensure that the turbine operates efficiently and safely.

Steam Admission Section

The steam admission section is a crucial component of a steam turbine, responsible for controlling the flow of steam into the turbine blades. It consists of various components that work together to ensure the efficient and regulated delivery of steam to the turbine, optimizing its performance and preventing potential damage.

Key Components of the Steam Admission Section

  1. Main Stop Valve: The main stop valve acts as the primary gatekeeper, controlling the main steam flow into the turbine. It is typically a large, high-pressure valve that can be rapidly opened or closed in emergency situations.
  2. Control Valve: The control valve regulates the steam flow to maintain the desired turbine speed and power output. It works in conjunction with the governor, which receives feedback from the turbine’s speed sensor and adjusts the control valve accordingly.
  3. Nozzle Chest: The nozzle chest houses the nozzles, which are specially shaped orifices that accelerate the steam flow before it enters the turbine blades. The geometry of the nozzles influences the steam velocity and pressure, affecting the turbine’s performance.
  4. Steam Strainer: The steam strainer is a safety device that removes impurities and debris from the steam flow, protecting the turbine blades from erosion and damage. It ensures that only clean steam enters the turbine, ensuring optimal performance and longevity.
  5. Steam Bypass Valve: The steam bypass valve provides an alternative path for steam to flow, bypassing the turbine blades when necessary. It is typically used during startup or shutdown procedures to prevent excessive speed or pressure buildup.

Functions of the Steam Admission Section

  1. Regulating Steam Flow: The steam admission section controls the flow of steam into the turbine, ensuring a smooth and regulated supply that matches the turbine’s power demand.
  2. Optimizing Turbine Performance: By regulating steam flow and pressure, the steam admission section optimizes the turbine’s performance, maximizing efficiency and power output.
  3. Protecting Turbine Blades: The steam strainer and bypass valve protect the turbine blades from damage caused by impurities or excessive steam pressure, ensuring long-term reliability.
  4. Enabling Safe Operation: The main stop valve and control valve provide quick shut-off capabilities in emergency situations, ensuring safe operation of the turbine.


The steam admission section plays a vital role in the operation and performance of a steam turbine. Its components work in harmony to regulate steam flow, optimize turbine performance, protect the turbine blades, and enable safe operation. By ensuring a smooth and controlled delivery of steam, the steam admission section contributes significantly to the overall efficiency and reliability of steam turbines in various applications.

EMS Power Machines

EMS Power Machines
EMS Power Machines

We design, manufacture and assembly Power Machines such as – diesel generators, electric motors, vibration motors, pumps, steam engines and steam turbines

EMS Power Machines is a global power engineering company, one of the five world leaders in the industry in terms of installed equipment. The companies included in the company have been operating in the energy market for more than 60 years.

EMS Power Machines manufactures steam turbines, gas turbines, hydroelectric turbines, generators, and other power equipment for thermal, nuclear, and hydroelectric power plants, as well as for various industries, transport, and marine energy.

EMS Power Machines is a major player in the global power industry, and its equipment is used in power plants all over the world. The company has a strong track record of innovation, and it is constantly developing new and improved technologies.

Here are some examples of Power Machines’ products and services:

  • Steam turbines for thermal and nuclear power plants
  • Gas turbines for combined cycle power plants and industrial applications
  • Hydroelectric turbines for hydroelectric power plants
  • Generators for all types of power plants
  • Boilers for thermal power plants
  • Condensers for thermal power plants
  • Reheaters for thermal power plants
  • Air preheaters for thermal power plants
  • Feedwater pumps for thermal power plants
  • Control systems for power plants
  • Maintenance and repair services for power plants

EMS Power Machines is committed to providing its customers with high-quality products and services. The company has a strong reputation for reliability and innovation. Power Machines is a leading provider of power equipment and services, and it plays a vital role in the global power industry.

EMS Power Machines, which began in 1961 as a small factory of electric motors, has become a leading global supplier of electronic products for different segments. The search for excellence has resulted in the diversification of the business, adding to the electric motors products which provide from power generation to more efficient means of use.

Leave a Reply

Your email address will not be published. Required fields are marked *