R S Enterprise Manufacturer and Supplier of Water CO2 Type Fire Extinguisher ,Carbon Dioxide Type Fire Extinguisher, Dry Powder Type Fire Extinguisher,ABC Modular Type Fire Extinguisher, Clean Agent Fire Extinguisher, ABC Stored Pressure Type Fire Extinguisher, Close Circuit (cc) Tv System, Video Door Phone, Hydrant System Accessories, Fire Door, Fire Helmet, Automatic Time Attendance Payroll System
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Manufacturer and Supplier of Water CO2 Type Fire Extinguisher
,Carbon Dioxide Type Fire Extinguisher, Dry Powder Type Fire Extinguisher,ABC Modular Type Fire Extinguisher, Clean Agent Fire Extinguisher, ABC Stored Pressure Type Fire Extinguisher, Close Circuit (cc) Tv System, Video Door Phone, Hydrant System Accessories, Fire Door, Fire Helmet, Automatic Time Attendance Payroll System

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The user attaches a hose to the fire hydrant, then opens a valve on the hydrant to provide a powerful flow of water, on the order of 350 kPa (50 lbf/in²) (this pressure varies according to region and depends on various factors including the size and location of the attached water main). This user can attach this hose to a fire engine, which can use a powerful pump to boost the water pressure and possibly split it into multiple streams. One may connect the hose with a threaded connection, instantaneous "quick connector" or a Storz connector. A user should take care not to open or close a fire hydrant too quickly, as this can cause a water hammer, which can damage nearby pipes and equipment. The water inside a charged hose line causes it to be very heavy and high water pressure causes it to be stiff and unable to make a tight turn while pressurized. When a fire hydrant is unobstructed, this is not a problem, as there is enough room to adequately position the hose.

Most fire hydrant valves are not designed to throttle the water flow; they are designed to be operated full-on or full-off. The valving arrangement of most dry-barrel hydrants is for the drain valve to be open at anything other than full operation. Usage at partial-opening can consequently result in considerable flow directly into the soil surrounding the hydrant, which, over time, can cause severe scouring. Gate or butterfly valves can be installed directly onto the hydrant orifices to control individual outputs and allow for changing equipment connections without turning off the flow to other orifices. These valves can be up to 12 inches in diameter to accommodate the large central "steamer" orifices on many US hydrants. It is good practice to install valves on all orifices before using a hydrant as the protective caps are unreliable and can cause major injury if they fail.

When a firefighter is operating a hydrant, he or she typically wears appropriate personal protective equipment, such as gloves and a helmet with face shield worn. High-pressure water coursing through a potentially aging and corroding hydrant could cause a failure, injuring the firefighter operating the hydrant or bystanders.

In most jurisdictions it is illegal to park a car within a certain distance of a fire hydrant. In North America the distances are commonly 3 to 5 m or 10 to 15 ft, often indicated by yellow or red paint on the curb. The rationale behind these laws is that hydrants need to be visible and accessible in an emergency.


   14 days ago
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CCTV" redirects here. For the Chinese channel, see China Central Television. For other uses, see CCTV (disambiguation).

Surveillance cameras on the corner of a building.

Dome CCTV cameras.

Dome camera in a rail station
Closed-circuit television (CCTV), also known as video surveillance, [1][2] is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors. It differs from broadcast television in that the signal is not openly transmitted, though it may employ point to point (P2P), point to multipoint (P2MP), or mesh wired or wireless links. Though almost all video cameras fit this definition, the term is most often applied to those used for surveillance in areas that may need monitoring such as bars, banks, casinos, schools, hotels, airports, hospitals, restaurants, military installations, convenience stores and other areas where security is needed. Videotelephony is seldom called "CCTV" but the use of video in distance education, where it is an important tool, is often so called.[3][4]

Surveillance of the public using CCTV is common in many areas around the world. In recent years, the use of body worn video cameras has been introduced as a new form of surveillance. Video surveillance has generated significant debate about balancing its use with individuals' right to privacy even when in public.[5][6]

In industrial plants, CCTV equipment may be used to observe parts of a process from a central control room, for example when the environment is not suitable for humans. CCTV systems may operate continuously or only as required to monitor a particular event. A more advanced form of CCTV, utilizing digital video recorders (DVRs), provides recording for possibly many years, with a variety of quality and performance options and extra features (such as motion detection and email alerts). More recently, decentralized IP cameras, some equipped with megapixel sensors, support recording directly to network-attached storage devices, or internal flash for completely stand-alone operation.

   Over a month ago
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Closed-circuit television (CCTV), also known as video surveillance, [1][2] is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors. It differs from broadcast television in that the signal is not openly transmitted, though it may employ point to point (P2P), point to multipoint (P2MP), or mesh wired or wireless links. Though almost all video cameras fit this definition, the term is most often applied to those used for surveillance in areas that may need monitoring such as bars, banks, casinos, schools, hotels, airports, hospitals, restaurants, military installations, convenience stores and other areas where security is needed. Videotelephony is seldom called "CCTV" but the use of video in distance education, where it is an important tool, is often so called.[3][4]

Surveillance of the public using CCTV is common in many areas around the world. In recent years, the use of body worn video cameras has been introduced as a new form of surveillance. Video surveillance has generated significant debate about balancing its use with individuals' right to privacy even when in public.[5][6]

In industrial plants, CCTV equipment may be used to observe parts of a process from a central control room, for example when the environment is not suitable for humans. CCTV systems may operate continuously or only as required to monitor a particular event. A more advanced form of CCTV, utilizing digital video recorders (DVRs), provides recording for possibly many years, with a variety of quality and performance options and extra features (such as motion detection and email alerts). More recently, decentralized IP cameras, some equipped with megapixel sensors, support recording directly to network-attached storage devices, or internal flash for completely stand-alone operation.

   Over a month ago
SEND

The user attaches a hose to the fire hydrant, then opens a valve on the hydrant to provide a powerful flow of water, on the order of 350 kPa (50 lbf/in²) (this pressure varies according to region and depends on various factors including the size and location of the attached water main). This user can attach this hose to a fire engine, which can use a powerful pump to boost the water pressure and possibly split it into multiple streams. One may connect the hose with a threaded connection, instantaneous "quick connector" or a Storz connector. A user should take care not to open or close a fire hydrant too quickly, as this can cause a water hammer, which can damage nearby pipes and equipment. The water inside a charged hose line causes it to be very heavy and high water pressure causes it to be stiff and unable to make a tight turn while pressurized. When a fire hydrant is unobstructed, this is not a problem, as there is enough room to adequately position the hose.

Most fire hydrant valves are not designed to throttle the water flow; they are designed to be operated full-on or full-off. The valving arrangement of most dry-barrel hydrants is for the drain valve to be open at anything other than full operation. Usage at partial-opening can consequently result in considerable flow directly into the soil surrounding the hydrant, which, over time, can cause severe scouring. Gate or butterfly valves can be installed directly onto the hydrant orifices to control individual outputs and allow for changing equipment connections without turning off the flow to other orifices. These valves can be up to 12 inches in diameter to accommodate the large central "steamer" orifices on many US hydrants. It is good practice to install valves on all orifices before using a hydrant as the protective caps are unreliable and can cause major injury if they fail.

When a firefighter is operating a hydrant, he or she typically wears appropriate personal protective equipment, such as gloves and a helmet with face shield worn. High-pressure water coursing through a potentially aging and corroding hydrant could cause a failure, injuring the firefighter operating the hydrant or bystanders.

In most jurisdictions it is illegal to park a car within a certain distance of a fire hydrant. In North America the distances are commonly 3 to 5 m or 10 to 15 ft, often indicated by yellow or red paint on the curb. The rationale behind these laws is that hydrants need to be visible and accessible in an emergency.



   Over a month ago
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Water tender, Type B are used in towns or parts of town and industries where the
fire risk is such that high rate of discharge of water is necessary for fire fighting
and a high degree of maneuverability is also desired of the fire appliance at the
same time.
This standard was first published in 1959 and revised in 1970 and 1980. The
third revision is being based on the experience gained after publication of
standard and availability of new designs and accessories. The revision includes
provision of higher capacity of pump and water tank. Pump has been placed at
the rear of appliance and coupling details have been incorporated. Provisions of
water/foam monitor, telescopic light mast and alternator unit have been included
in the revision. Details pertaining to body work, storage, pipe lines and values
have been elaborated.
A list of accessories and equipment which do not form part of this appliance and
most of which are normally required to assist in operation of the appliance is
given in Annex B for information and guidance.
For the purpose of deciding whether a particular requirement f this standard is
complied with, the final value, observed or calculated, expressing the result of a
test or analysis, shall be rounded off in accordance with IS 2:1960 `Rules for
rounding off numerical values (revised)'. The number of significant places
retained in the rounded off value shall be the same as that of the specified value
in this standard.

   Over a month ago
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