Water Fire Tender By Vijay Fire Vehicles And Pumps Ltd

TECHNICAL SPECIFICATION FOR WATER FIRE TENDER

CHASSIS:
The water tender shall be fabricated on TATA 1918 or AL 1920 or Equivalent BS VI chassis drag hook or eye of adequate strength and design shall be provided at rear and front. The chassis shall be supplied by the dept.

MAIN PUMP (VIJAY FIRE AA CE CERTIFIED]
FIRE PUMP (MULTI PRESSURE) The pump shall be centrifugal type, multi pressure, having output capacity of 3000 LPM at 7 kg/cm2 and 350 LPM at 35 kgs/cmA at 3 mtrs suction lift at NTP condition. The low-pressure side will be of single stage and the high-pressure side also with single stage having regenerative type impeller.

The pump shall comply following performance parameters.
a) Normal Pressure output: 3000 LPM at 7 kg/cmA
b) High pressure output: 350 LPM at 35 kg./cmA
c) Maximum pressure in: 12 kg/cmA (shut off normal pressure mode. pressure)
d) Maximum pressure in: 40 kg/cmA High pressure mode
e) Deep lifting capacity of: 30 cm/sec. max. up to 7 pump. Mtrs in 30 sec. at NTP condition.

The overall pump shall be constructed from Gun Metal IS 318 Gr II/ The normal (low) pressure impeller, volute, and impeller wearing shall be made from gunmetal confirming to Gr.II of IS 318/1981 and the regenerative type high pressure impeller shall be of Stainless steel. The pump shaft shall be made from stainless steel confirming to IS 6603/1972. The bearing housing will be made of C.I. and all the studs and bolts coming in contact with water shall be of stainless steel. The bearings used in the pump shall be of reputed make and preferably SKF.

The normal and high-pressure impeller shall be mounted on a single shaft and normal (low) pressure impeller shall be dynamically balanced. The pump shall be provided with self-adjusting mechanical carbon seal assy. The pump shall be provided with an inbuilt filter of easily removable type, which shall filter the water before entering into the high-pressure stage impeller. Operation of low pressure to high pressure or vice-a-versa shall be possible by actuation of single lever. The pump shall have facility to operate low pressure and high-pressure mode simultaneously or individually. The pump shall be provided in built (integrated in the pump outlet manifold) Pressure Relief Valve (PRV) which shall operate automatically and shall not allow the high pressure to increase beyond 45 kgs/cm2.

The pump shall be provided with one suction inlet of 140 mm dia. Having round threads confirming to IS:902 of 1974 and three numbers of 63 mm delivery outlets having screw down type valves fitted with instantaneous couplings as per IS 903/1993 and one 38 mm outlet with ball valve and female instantaneous coupling. The delivery valve screw shall not be with gland. The high-pressure outlet shall not be less than 25 mm and shall either be flange on screw type. The efficiency of the pump shall be such that the power required shall not be more than available with the chassis at safe RPM for stationery and continuous operation.

The pump shall be rear mounted connected to P.T.O. by propeller shafts and universal and slip joint.

Pump primer The priming system shall be horizontal Reciprocating type integrated in pump bearing housing. The primer shall be capable of lifting the water in 30 seconds from the depth of 7 trs. (up to pump inlet) at NTP condition. The pump shall attain a dry vacuum of 620 mm of Hg. The reciprocating pistons shall be made up of stainless steel and reciprocate in linear bearings. The cylinder and priming valve housing shall be made from gunmetal. The pump with its fitment shall be tested hydrostatically to 1.5 times the working pressure at the pump i.e. it shall be tested to 21 kg/cm2.

POWER TAKE OFF UNIT (PTO) (Reputed Make):