There are mainly two types of single point tools namely the solid type as shownbelow and the tipped tool . The solid type single point tool may be made from high speed steel, from a cast alloy. Brazed tools are generally known as tool bits and are used in tool holders. The tipped type of […]
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It is the most commonly used milling machine used for general shop work. In this type of milling machine the table is mounted on the knee casting which in turn is mounted on the vertical slides of the main column. The knee is vertically adjustable on the column so that the table can be moved
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Lathe is a machine, which removes the metal from a piece of work to the required shape and size. Lathe is one of the most important machine tools in the metal working industry. A lathe operates on the principle of a rotating work piece and a fixed cutting tool. The cutting tool is feed into
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Sprinkler heads are the key components of the fire fighting system Heads must be suitable in design, performance, application and temperature for type of property it is protecting Standard heads are marked with SSU (standard sprinkler upright) or SSP (standard sprinkler pendent) on the deflector Side wall heads may be pendent, upright, or horizontal The
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Pipes are not filled with water All sprinkler heads are of the standard type (they are closed), A detection device opens a water valve Water fills the pipes Water only flows from a sprinkler head if it is opened by heat from a fire, Water flows until shut off and system is reset Used primarily
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All sprinkler heads are pre-opened A signal from a detection device mechanically opens a water valve water fills the pipes and flows from all heads water flows until shut off, system is reset Primarily installed in special hazard areas that have fast spreading fire Usually requires several detectors to activate before discharging. Pipes in protected
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Dry pipes systems are used in unheated buildings, but the valve room must be heated, Dry pipe systems are more difficult to design than wet pipe systems and are harder to restore. Pipes are not filled with water (but with pressurized gas or air), Heat from a fire opens a sprinkler head Usually only one
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Pipes are always filled with water. Heat from fire opens a sprinkler head. Usually only one or two heads open Water flows until it is shut off The open sprinkler head(s) is replaced and the system is reset A one-way clapper prevents water from re-entering the water supply Gauges on both sides of the main
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water is used as working fluid that transports thermal energy between conditioned space and A/C plant. Chilled water is circulated for cooling while Hot water is circulated through coils for space heating. As only water is supplied by HVAC plant to the space, Fresh air has to be supplied by another unit to maintain Indoor
Air is used as the media in an all air system. Air transports thermal energy from the conditioned space to the HVAC plant. As shown in Figure , In these systems air is processed in the A/C plant namely AHU (Air Handling Unit). AHU consists of Dampers, Mixing chambers, Filters, Cooling/ Heating coils, Humidifiers, Fans/