All Article

Pressure seal parallel slide gate valves are ideal for clean service and steam. The parallel slide valve design relies on the primary system pressure acting on the downstream disc for seat integrity. There is no wedging action or extra loading on the seats.
Parallel Slide Gate Valve design offers many advantages over double disc wedge gate valves in providing tight reliable shut-off in water and steam service.

One of these advantages comes from the seating method used by these valves. Our Parallel Slide Gate Valve uses position seating allowing the line force in the system to assist in the sealing of the valve seat by holding the downstream disc firmly against the downstream seat. By comparison, a double disc wedge gate valve relies upon torque force to wedge the disc into the valve body to provide shut off. This requires the valve seat in a double disc wedge gate to actually deform to provide seating. Over a short period of time this can lead to permanent deformation of the seat allowing a leak path to occur. Position seating also requires less torque to open and close than torque seating. This allows for use of a smaller actuator to operate our valve, thereby reducing operator cost.

Also, the wide flat seating surface of our valve offers an advantage in sealing surface area. Our valve has a seating surface width of up to two inches. This prevents minor scratches or seat deformation from becoming a leak path. Since a double disc wedge gate valve relies upon a line contact seating surface, it has a very thin seating surface area. A line contact seat increases the probability that a minor seat inconsistency will become a leak path. Also, the greater seating surface of our valve provides for distribution of bearing stresses over a large area thus reducing seat wear caused by everyday operation.

Due to its wide flat seats and position seated design, a parallel slide gate does not require reseating of the disc after a valve closed hot cools down. A double disc wedge gate, due to its torque seated design, may require that you reseat it after cooling due to contraction which may loosen a previously adequate seal.

High pressuare globe valves are used primarily in situations where throttling of the commodity is required. By simply rotating the handwheel, the rate at which the commodity flows through the valve can be adjusted to any desired level. Having the valve seat parallel to the line of flow is an important feature of the globe valve.
They are normally used to control the flow in a pipeline also used to regulate the position of a movable plug with relation to the ring seat which is stationary. A superior advantage of a globe valve is that it does not leak as much as other valves. 

APPLICATIONS OF STEAM TURBINES

Steam turbines are a part of various industries, from medium to large scale, and include dozens of institutional applications.


Chemical Industry: Providing heat and electricity to drive different processes in the chemical and pharmaceutical industries, steam turbines are integrated in the process of producing power.
Waste Plants: Steam turbines help generate the power needed to harness energy from wastes.
Oil & Gas: Used as a pump drive or a compressor, steam turbines support dozens of operations in the oil and gas industry.
Sugar Mills: Offering high levels of efficiency and sustainable operations, steam turbines are used to produce green carbon-dioxide energy from bagasse.


Some of the most popular applications of a steam turbine in different industries include the following:

1.      COMBINED HEAT AND POWER

Steam turbines are an essential component of most CHP systems. They support combined heat and power systems that are used to power industrial processes, under conditions where waste fuels are available for the boiler to safely utilize. When used for CHPs, the steam emitted by the steam turbine can be used directly. Steam turbine powered CHPs are typically found in paper mills, where there is an abundance of waste fuels ranging from black liquor to hog fuel, each equally successfully in powering the boiler. They can also be found in chemical plants that make excessive use of steam turbines; followed by their use of metals.

2.      DRIVING MECHANICAL EQUIPMENT

Steam turbines are a far more efficient alternative to electrical power. Especially when it comes to driving different equipment like air compressors, boiler feed water pumps, refrigerator chillers, etc.

3.      DISTRICT HEATING & COOLING SYSTEMS

Different institutions throughout different cities rely on district cooling and heating systems. These systems usually have a steam turbine placed between the boiler and the distribution system or placed as a replacement for a pressure reduction station. It is to be noted that, more often, boilers are capable of producing moderate-pressure steam while the distribution requires low pressure steam. Bridging this gap between the two, a steam turbine generates energy using the high pressure steam and emits low pressure steam into the distribution system.

4.      COMBINED CYCLE POWER PLANTS

Steam turbines allow power plants to generate power using a gas turbine and utilize gas and heat produced in the process to generate steam that, in turn, produces additional power. Combined cycle power plants supported by steam turbines are capable of producing or accomplishing electric generation efficiencies extending beyond the 50-percent mark and are used in large industrial applications. Most of the electricity throughout the United States is produced with the help of steam turbine engines. Offering higher efficiencies, low costs, and a positive impact on the environment, steam turbines have become a integral part of several American industries.