yard operation

насос сплинкерной системы пожаротушения
жокей-насос
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Принцип работы насосной установки спринклерной системы пожаротушения,  в  состав которой входит жокей-насос
В случае падения давления воды в спринклерной системе, первым включается жокей-насос. Если расход воды небольшой и жокей-насос справляется с восполнением утечки, то через некоторое время после достижения верхнего предела заданного давления он выключится. Если же это не протечка, а открылось несколько спринклеров и расход воды значительный, то даже при работающем жокей-насосе давление продолжает падать. В этом случае, по сигналу второго реле давления, включается пожарный насос. Резервный агрегат включается в случае невыхода основного на рабочий режим. Независимо от того, потушен пожар или нет, пожарные насосы сами не отключаются, их можно выключить только вручную со шкафа управления.
[ http://www.airweek.ru/pr_news_137.html]

Jockey Pump

A jockey pump is a small pump connected to a fire sprinkler system and is intended to maintain pressure in a fire protection piping system to an artificially high level so that the operation of a single fire sprinkler will cause an appreciable pressure drop which will be easily sensed by the fire pump automatic controller, causing the fire pump to start. The jockey pump is essentially a portion of the fire pump's control system.
In the U.S.
The application of a jockey pump in a fire protection system is covered by documents produced by the NFPA (National Fire Protection Association,) known as NFPA 20 "Fire Pumps" Standard and NFPA 13 "Design and Installation of Fire Sprinkler Systems". These must be inspected as with any other part of the system per NFPA 25 "Inspection and Testing of Water-Based Fire Protection Systems".Fire protection systems are governed in most states by statute, building code, and/or fire code.
In India
This jockey pump is also a must while designing the Fire Hydrants Pumps skid for Industrial installations.While the logic followed for the effective operation of the fire fighting pumps may depend upon or vary as per the regulations in a particular country, in India, the pump manufacturers like Mather-Platt with standard Fire Pumps generally adhere to the TAC guidelines (Tariff Advisory Committee guidelines).
Although India's premier manufacturer Kirloskar Brothers Limited, with approvals from UL and FM Global, LPCB, ASIB: follows TAC guidelines (Tariff Advisory Committee guidelines), or FM GLobal and UL standards depending on the clients needs.
If one is following the TAC guidelines, follow this approach

*Once the complete fire fighting circuit is under pressure by operating the pumps for sufficient time provided all the fire hydrant valves (Single yard hydrants, Fire escape hydrants, etc)are closed, the main pump stops.
*Due to some leakages somewhere in the fire fighting piping circuit, when there is a loss of system pressure which will be constantly monitored by the Pressure sensors in the circuit, the jockey pumps receives a signal to start from the automatic control panel, and will run to augment this loss of pressure by pumping more water into the circuit. Once the pressure is maintained as per the set point, it stops.
*If any hydrant valve is opened due to some fire and water is consumed, then the jockey pump due to its small capacity compared to the main pumps (one running, one stand-by)in terms of volumetric capacity, the main pump will start and then the jockey immediately stops.This way jockey pump is important which senses the loss of pressure in the circuit first.

[ http://en.wikipedia.org/wiki/Jockey_pump#Jockey_Pump]

Тематики

• пожарная безопасность

Синонимы

• жокей-насос

EN

• jockey pump

парк культуры и отдыха — Park of Culture and Rest, recreation park

автомобильный парк — fleet of motor vehicles; automobile / car park; motor pool

тракторный парк — fleet of tractors

станочный парк — stock of machine-tools in operation

вагонный парк — rolling-stock

самолётный парк — flying stock

трамвайный парк — tram depot

понтонный парк — pontoon bridge park, pontoon train

ход поршня — piston stroke

ход клапана — valve stroke

тихий ход — slow speed

задний ход — backing, reverse; backward motion

дать задний ход — put* in into reverse

полный ход — gull speed

малый ход — slow speed

средний ход — half-speed

холостой ход — idling

замедлять ход — slow down, reduce speed

есть на ходу — snatch a meal / bite

по ходу часовой стрелки — clockwise

ход событий — course / march of events; trend of developments

при таком ходе событий — with the present course of events

в ходе переговоров — in the course of negotiations

ход мыслей — train of thought

ход болезни — progress of the illness / disease

ход боя — course of action

ход со двора — entry by the yard

потайной ход — secret passage

быть в ходу — be in vogue, be current, be popular, be in great request

этот товар в большом ходу — this article is in great demand, these goods are in great request

дать ход делу — set* an affair going

дела идут полным ходом — affairs / things are in full swing

ему не дают хода — they won't give him a chance

национа́льный парк — national park

парк культу́ры и о́тдыха — amusement park

автомоби́льный парк — fleet of motor vehicles ['viːɪ-]; automobile [-biːl] / car park; motor pool

тра́кторный парк — fleet of tractors

стано́чный парк — stock of machine tools in operation

ваго́нный парк — rolling stock

самолётный парк — flying stock

трамва́йный парк — tram depot

артиллери́йский парк — ordnance depot

понто́нный парк — pontoon bridge park, pontoon train