Auxiliary feed water stop valve - This is a smaller valve fitted in the auxiliary steam supply line, and is usually of the nonreturn type. Main Steam Stop valve - This valve is fitted in the main steam supply line and is usually of the non-return type. Main Stop Valve - To control the flow of steam into the main steam line leading to the main engine. It is located on top of the boiler and is usually of the non-return angle globe type shown. Auxiliary Stop Valve - To control the flow of steam into the auxiliary steam line, the auxiliary stop valve is located on the top of the boiler. It is of the same general design as the main stop valve except that it is smaller. Main Feed Check Valve - It is used to control the supply of water to the boiler & to prevent the escaping of water from the boiler when the pump pressure is less or pump is stopped. Auxiliary Feed Check Valve - Two ways of supplying water to a boiler are required and are known as the main and auxiliary feed lines Safety Valve - A safety valve is a pressure relief valve actuated by inlet static pressure and characterized by rapid opening or pop action. Bottom Blowdown Valve - To remove the heavier loose impurities which accumulate on the bottom of the boiler, the bottom blow off valve is installed near the bottom of the boiler. Surface Blowdown Valve - certain impurities in the boiler water tend to collect and float on the surface of the water. To remove these a surface blowoff valve is installed on the side of the boiler. Force Draught Fan - is used basically for providing the required quantity of hot air to the furnace for smooth and uniform combustion of fuel. FD fan will produce the positive pressure inside the system i.e. furnace. Burner - - A burner is a mechanical device that supplies required amount of fuel and air and creates a condition of rapid mixing and produce flame. The mixing rate of air and fuel directly affects the flame stability, shape and emission. An oil burner is a heating device which burns #1, #2 and #6 heating oils, diesel fuel or other similar fuels Water Sampling Valve - A Sampling Valve is a type of valve used in process industries that allows taking a representative portion of a fluid to test (e.g. by physical measurements, chemical analysis, microbiological examination), typically for the purposes of identification, quality control, or regulatory assessment. It is a valve used for sampling. Mud boxes - Mud boxes are fitted into the machinery space bilge suction piping. The mud box is a coarse strainer with a straight tailpipe down to the bilge . To enable the internal perforated plate to be cleaned when necessary, the lid of the mud box is easily removed without disconnecting any pipework. Steam Trap - A steam trap is a device used to discharge condensates and non-condensable gases with a negligible consumption or loss of live steam. Water Column - is used on a steam boiler to provide a water level reading Sight Glass - a transparent tube through which the operator of a tank or boiler can observe the level of liquid contained within. Level Indicator - It indicate the water level inside the boiler vessel. It shows the level in the boiler drum. Pressure Switch - A pressure switch is a form of switch that closes an electrical contact when a certain set fluid pressure has been reached on its input. The switch may be designed to make contact either on pressure rise or on pressure fall. Pressure Gauge - The function of the pressure gauge is to measure the pressure exerted inside the vessel. Air Release Valve - is a plumbing valve used to automatically release trapped air from a heating system. to release air pockets that collect at each high point of a full pressured pipeline Temperature Gauge - Temperature gauges measure the thermal state of a homogeneous substance Belly Plug - A small metal plug threaded from the outside into a hole in the bottom of the shell of a Scotch marine boiler. Fusible Plug - To give warning of low water condition. To extinguish the fire in the event of the boiler shell failing below a certain specified limit. Solenoid Valve - regulates the movement of gas or liquid by means of electric current. A solenoid valve is an electromechanically operated valve. Their tasks are to shut off, release, dose, distribute or mix fluids. Electric Control Unit - is any embedded system that controls one or more of the electrical system or subsystems in a transport vehicle. Fuel Filter - A fuel filter is a filter in the fuel line that screens out dirt and rust particles from the fuel, normally made into cartridges containing a filter paper. Fuel Check Valve - is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. Fuel Pump - A fuel pump is a mechanical or electrical pump that draws fuel from a tankto provide the fuel supply for a carburetor or fuel injection system. Cascade Tank - Cascade tank, also known as hot well, is a part of boiler feed water system. Water is pumped into the cascade tank from the feed water tank. The boiler water is treated in the cascade tank and the return from the steam heating system is also connected to the hot well.
