A. MONITOR – VAJRA 331 (CAST BRONZE)

TECHNICAL DATA

MONITOR VAJRA 331
NOZZLE VARSHA HF 40U-500
VARSHA HF 40U-750
VARSHA 40U-500
VARSHA 40U-750
VARSHA 40U-1000
NOMINAL SIZE 3 Inch (80 MM)
MAX. SERVICE 14 Bar (200 PSI)
PRESSURE UL Listed for 175 PSI
MAXIMUM FLOW 1000 GPM (3800 LPM)
Refer Table I for flow
FACTORY 28 Bar (400 PSI)
HYDROSTATIC
TEST PRESSURE
SWIVEL JOINT Bronze to IS:318/ASTM B 62
with double row of Stainless
Steel Ball Bearing and Grease
Fittings
NOZZLE THRUST Flow in LPM X √Pressure
REACTION IN Kg. in Kg./sq.cm. X 0.0228
INLET CONNECTION 3” (80 NB) or 4” (100 NB)
Flange to ANSI B16.5 #150,FF
OUTLET CONNECTION 3” BSP (M) or 3” NH
MONITOR ELEVATION 90 Deg. above horizontal
& 45 Deg. below horizontal
MONITOR ROTATION 360 Deg. continuous
MONITOR MOVEMENT Manual
APPROVAL UL Listed
FINISH Red RAL 3001 for Monitor,
Natural finish for Nozzle
WEIGHT (Approx) 33Kg -Monitor without nozzle
9.2Kg – Nozzle VARSHA 40U
12.7Kg-Nozzle VARSHA HF40U
PRESSURE GAUGE Optional, at outlet
ORDERING Specify Monitor & Nozzle
INFORMATION Model

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Description

A. MONITOR - VAJRA 331 (CAST BRONZE)
A. MONITOR – VAJRA 331 (CAST BRONZE)

The Monitor Model VAJRA-331 is durable manual controlled monitor for fixed installation as well as trailer mounted unit. The monitor is generally used
for protection of flammable liquid storage tanks, loading racks, dykes marine and many other Industrial application. The Monitor possesses several design features that provides ease of operation, minimum maintenance and resistance to corrosive environments. The monitor has cast bronze 3 inch (80MM) water way. The vertical and horizontal rotation is through  corrosion resistant bronze swiveling joint with double row of stainless steel ball bearing. Both vertical and horizontal movements are controlled by handle with twist lock. VAJRA 331 is UL Listed with VARSHA  HF40U Nozzle (with pickup tube) and VARSHA 40U Nozzle (without pickup tube). The monitor has large flow capability and can be  manually operated by a single fire fighter. The design ensures to prevent jet reaction forces from affecting the horizontal and vertical position of the monitor. The monitor has the ability for 360 deg. continuous horizontal rotation and angle of elevation is from 90 deg. above horizontal to 65 deg. below horizontal. When used on oscillation unit the angle of elevation will be – 40° to +80° manual adjustable. The water vanes in discharge tube reduces turbulence and friction loss, thus increasing the nozzle performance to achieve greater range. To ensure desired performance, friction loss through monitor must be considered while selecting the nozzle and flow through the monitor with reference to available base pressure at inlet of the monitor. For flow and jet reach data, refer monitor nozzle data sheet.

NOTE:
1. Any intermediate range (UP + DN)º between UP ≤ 90º and DN ≤ 65º can be provided as per requirement of the customer.
2. The vertical lock needs one turn for lock & unlock. Excessive rotation of knob should not be carried out.
3. Pressure Gauge is optional supply and should not be considered for friction loss measurement.                                                                                                4. For details of VARSHA 40U, refer Data Sheet No.

HD 280 and for VARSHA HF40U refer Data Sheet
No.HD 281

INSTALLATION, TESTING AND
MAINTENANCE
The monitor must be installed and operated carefully by a trained person, having good knowledge of equipment. Before assembly of the monitor to the supply piping, thoroughly flush the piping with water to avoid sand, residue, welding slag or other debris hindering the proper functioning of the monitor. After few initial successful tests, an authorized person must be trained to perform the inspection and  testing of the monitor. The monitor should be ready for use. To achieve this condition, scheduled inspection and maintenance  operation should be performed and it must be recorded
in the maintenance register book indicating the requirement or recommendation. The recommended maintenance, procedure must be followed as given in the manual and also as per the local authority having jurisdiction. It is recommended to carry out weekly physical inspection of the monitor. The inspection should verify that no damage has taken place to any component and the monitor is ready for use. Carry out functional test every month for the flow, regular rotation in horizontal and vertical plane for the entire operating range to observe any leakage. Periodic proper greasing through grease nipple provided on bearing, worm wheel and worm shaft must be ensured. Use water resistant low friction synthetic grease. Lubrication is required for smooth operation.  Each monitor must be operated with full flow in accordance to the guidelines of the organisation
having local jurisdiction. The owner is responsible for maintaining the equipment in proper operating condition.
CAUTION
A trained personnel for fire fighting must use the monitor. Appropriate guidance & training must be given to reduce the risk or injury. The nozzle must be fixed to the monitor carefully. The piping must be able to with stand the horizontal reaction force. Serious injury to personnel and equipment can result from improper installation. When installing monitor it is critical that flange bolts be tightened uniformly to prevent cocking of the monitor relative to the flange or valve. Before flowing water from monitor, check that all personnel are out of stream path and stream direction will not cause avoidable property damage. Application of water or foam on an electric appliance  can cause serious injury.  The water supply to monitor must be increased /
decreased gradually to prevent possible water hammer  occurrence. Do not try to over-tighten/ over-loosen Monitor loc