Mainly for on/off control, with low pressure drop. Gate valves are primarily designed to start or stop flow, and when a straight-line flow of fluid and minimum flow restriction is needed. In service, these valves generally are either fully open or fully closed. The disk of a Gate valve is completely removed when the valve is fully open; the disk is fully drawn up into the valve Bonnet. This leaves an opening for flow through the valve at the same inside diameter as the pipe system in which the valve is installed. A Gate valve can be used for a wide range of liquids and provides a tight seal when closed.
Butterfly valve used for isolating or regulating flow. The closing mechanism takes the form of a disk. Operation is similar to that of a ball valve, which allows for quick shut off. Butterfly valves are generally favored because they are lower in cost to other valve designs as well as being lighter in weight, meaning less support is required. The disc is positioned in the center of the pipe, passing through the disc is a rod connected to an actuator on the outside of the valve. Rotating the actuator turns the disc either parallel
or perpendicular to the flow. Unlike a ball valve, the disc is always present within the flow, therefore a pressure drop is always induced in the flow, regardless of valve position.
The alarm check valve is a water flow alarm device designed for vertical installation in the main supply to a wet pipe sprinkler system. When a flow of water from the system equals or exceeds that of a single sprinkler the valve is to actuate a fire alarm. It is designed to hold back water pressure in the piping system until the sprinkler is activated, to be used in wet pipe sprinkler installations in buildings not subjected to freezing temperatures. Alarm valve includes trim packages valves, Gauges, Pressure Switch, Fittings & Nipples to provide Retard Chamber connection, Drain Connections & Alarm test by pass.
Zone Control Valve is a system designed to separate the area in case of maintenance and to get the indication of fire zone on a combination of Butterfly valve, Flow Switch, Pressure Gauge and Test & Drain Valves. A floor or zone control valve closes off all flow into or out of the fixed system zone it controls. They would be used for maintenance, to shut off a system that has tripped, or avoiding flow if an open head system. Since all flow is stopped, including fire suppression flows, the valves must be inspected regularly and monitored. In a large structure the valves would have tamper switches to make life easier on the monitors. The use of an OS&Y valve, mounted where easily seen would also be useful.
A non-return valve or one-way valve is that normally allows fluid (liquid or gas] to flow through it in only one direction. Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. An important concept in check valves is the cracking pressure which is the minimum upstream pressure at which the valve will operate. Typically, the check valve is designed for and can therefore be specified for a specific cracking pressure. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or system. The bodies [(external shells) of most check valves are made of plastic or metal.
Pipe fitting is the occupation of installing or repairing piping or tubing systems that convey liquid, gas, and occasionally solid materials. This work involves selecting and preparing pipe or tubing, joining it together by various means, and the location and repair of leaks. Pipe fitting work is done in many different trades: oil & gas, firefighting. Plumbing, HVAC, manufacturing. fire prevention, and many others. Fitters work with a variety of pipe and tubing materials including several types of plastic, copper, steel, iron, aluminum, clay, and Lead. HDPE Piping is performed in two ways i.e., Heat Fusion & Electro Fusion.
Heat fusion (sometimes called heat welding. butt welding or simply fusion) is a welding process used to join two different pieces of a thermoplastic. This process involves heating both pieces simultaneously and pressing them together. The two pieces then cool together and form a permanent bond. When done properly, the two pieces become indistinguishable from each other. Dissimilar plastics can result in improper bonding. This process is commonly used in plastic pressure pipe systems to join a pipe and fitting together, or to join a length of pipe directly to another length of pipe. Generally, polyolefin (such as polypropylene, polyethylene, and polybutylene) are used for these applications. Butt welding is usually performed using one of several methods.
Electro fusion is a method of joining MDPE, HDPE and other plastic pipes using special fittings that have built-in electric heating elements which are used towel the joint together. The pipes to be joined are cleaned, inserted into the electro fusion fitting [(with a temporary clamp if required) and a voltage [typically 40V) is applied for a fixed time depending on the fitting in use. The built-in heater coils then melt the inside of the fitting and the outside of the pipe wall, which weld together producing a very strong homogeneous joint. The assembly is then left to cool for a specified time
Fire Hydrant is an Exterior Valve Connection to water supply that provides one or more hose connections. As a system it is a water supply piping network system having one or more outlets and that is used to supply hose & fire department pumpers with water on private hydrants are supplied by a private service main that begins at the point of service, usually at a manually operated valve near the property line. Fire Hydrant system can also be a Fire Hydrants distributed through piping network with permanent water tank & pumps for the pressurized water supply which is normally a requirement for private property protection without public water system
A fire extinguisher is an active fire protection device used to extinguish or control small fires, often in emergency situations. It is not intended for use on an out-of-control fire, such as one which has reached the ceiling, endangers the user (i.e., no escape route, smoke, explosion hazard, etc.)], or otherwise requires the expertise of a fire department. Typically, a fire extinguisher consists of a hand-held cylindrical pressure vessel containing an agent which can be discharged to extinguish a fire.
Fire blankets are often more effective for most people than a fire extinguisher when faced with a fire. Fire blankets deprive a small fire of oxygen by smothering it. In order to do this, fire blankets are made from fire resistant materials, such as wool or fiberglass. A fire blanket can be used for a couple of different applications.
The first way is to smoother the fire by cutting of the oxygen necessary for it to keep burning. The material the fire blanket is made of is important as the blanket must be durable and can’t burn. This would not allow the oxygen to transfer to the fuel which would keep the fire burning. Absent this airflow, the fire will simply be smothered in a short amount of time. The blanket will need to remain in place until the fire surface area has completely cooled to prevent the fire from reigniting
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