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Monitor – VAJRA 331 (Cast Bronze)Monitor – VAJRA 433 (Cast Bronze)Monitor – VAJRA331-S (Oscillating Monitor)Monitor – M 241 (Stainless Steel)Monitor – M 341 (Stainless Steel)Monitor – Varun 443 Foam Monitor (Stainless Steel)Monitor – VARUN 643 BZ (Stainless Steel)Monitor – M (ISI) (Carbon Steel)Monitor – M 211 (Carbon Steel)Monitor – M 311 (Carbon Steel)Monitor – MG 413 (Carbon Steel)Monitor – VARUN 613 (Carbon Steel)Monitor – Varun 443 Electric Remote Controlled (Stainless Steel)

Zone Control Manifold Assembly
Y-Type Strainers
Water Motor Gong Bell
Water Motor Gong Bell
Water Motor Gong Bell
Water Curtain Nozzle
Vertical Sidewall Sprinklers
Varsha - HF60
Varsha - HF50
Varsha - HF4V
Varsha - HF40U
Varsha - HF40
Varsha - HF30
Varsha - 60
Varsha - 50
Varsha - 40U
Varsha - 40
Varsha - 30
Upright Sprinklers
Trolley Mounted Monitor
Trailer Mounted Monitor Model HD-CHETAK
Trailer Mounted Monitor
Test and Drain Valves
Tank Cooling Nozzle
Swing Check Valves
Sprinkler Ordering and Usage Guidelines
Sprinkler Guards
Sprinkler Cabinet
Solid Stream Nozzles
Skid Mounted Balance Pressure Foam Proportioning System
Single Interlock Preaction with Wet Pilot Actuation
Single Interlock Preaction with Electric Release
Single Interlock Preaction with Dry Pilot Actuation
Rim Seal Foam Pourers
Revolving Nozzle
Reverse Action Water Spray Nozzle
Retard Chamber
Recessed Sprinklers
Ratio Controller
Priming Shut-Off Valve
Pressure Switches
Pressure Switch - Explosion proof
Pressure Relief Valves
Pressure Gauges
Pre-Pack Pre-Action Systems
Potter Releasing Panel PFC-4410RC
Potter PFC-4410RC Control Panel
Post Indicators for NRS Gate Valves
Positive Drain Actuator
Portable Inline Foam Inductor
Pendent, Upright, Recessed K-8 Sprinklers
Pendent Sprinklers
OSYSU-EX-O (Outdoor Explosion Proof Outside Screw and Yoke Valve Supervisory Switch)
OSYSU-EX (Explosion Proof Outside Screw and Yoke Valve Supervisory Switch)
OS & Y Supervisory Switches
Nozzles - Air aspirating Foam-Water Sprinklers (Pendant)
Multi-line Vertical Deluge Skids
Multi Jet Control (MJC) Valve
Monitor – VARUN 643 BZ (Stainless Steel)
Monitor – VARUN 613 (Carbon Steel)
Monitor – Varun 443 Foam Monitor (Stainless Steel)
Monitor – Varun 443 Electric Remote Controlled (Stainless Steel)
Monitor – VAJRA331-S (Oscillating Monitor)
Monitor – VAJRA 433 | (Cast Bronze)
Monitor – VAJRA 331 | (Cast Bronze)
Monitor – MG 413 (Carbon Steel)
Monitor – M 341 (Stainless Steel)
Monitor – M 311 (Carbon Steel)
Monitor – M 241 (Stainless Steel)
Monitor – M 211 (Carbon Steel)
Monitor – M (ISI) (Carbon Steel)
Mobile Foam Unit
Mobile Bladder Tank
Medium Velocity Spray Nozzle
Jumbo Water Curtain Nozzle
Integrated Deluge Skid DSK
Inline Foam Inductor
Inline Balanced Pressure Foam Proportioner
HSW – Extended Coverage, Quick Response Sprinklers
Horizontal Sidewall Sprinklers
Horizontal Sidewall K-8 Sprinklers
High Velocity Spray Nozzle | (3/4 Inch)
High Velocity Spray Nozzle | (1 Inch)
HD-RAKSHAK IHP CO2 System
HD-INERTSYS® Inert Gas Suppression System
Hazmat Foam (HF)
Gate Valves
Foam Skids
Foam Pourers for Foam Makers
Foam Makers
Foam Concentrate Control Valve
Foam Concentrate By Pass Valve
Foam Chambers
Foam Branch Pipe
Foam Bladder Tank with pre-assembled Deluge Valve
Fluoroprotein Foam FP 6-C6
Fluoroprotein Foam FP 3-C6
Flow Switches
Flow Switch - Explosion Proof
Flexible Sprinkler Drops
Fire Hose Nozzle
Film Forming Fluoroprotein Foam FFFP 3/6-C6
Dual Bladder Tank Skids
Dry Pilot Actuator
Double Interlock Preaction with Electric/Pneumatic Release
Double Interlock Preaction with Electric/Electric Release
Deluge Valve Model H5 (Nickel Aluminum Bronze)
Deluge Valve Model H3 (Ductile Iron)
Deluge Valve Model H2 (Cast Steel)
Deluge Valve Model A (Cast Iron)
Deluge Cabinet D - PACK
Custom Engineered Deluge Skids
Conventional Sprinklers
Concealed Sprinklers
Butterfly Valves
Bladder Tank with Multiple Proportioners
Bladder Tank Foam Proportioning System
Automatic Pressure Maintenance Device
Automatic Ball Drip Valve
Atmospheric Foam Concentrate Storage Tank
AR SFFF F3 3X3 (SYNTHETIC FLUORINE FREE FOAM)
Aqueous Film Forming Foam 1% (AFFF 1-C6)
Aqueous Film Forming Foam (AFFF 6-C6)
Aqueous Film Forming Foam (AFFF 3-C6 & AFFF 3F-C6)
Alcohol Resistant Aqueous Film Forming Foam (AR-AFFF 3X6-C6)
Alcohol Resistant Aqueous Film Forming Foam (AR-AFFF 3X3-C6)
Alcohol Resistant Aqueous Film Forming Foam (AR-AFFF 1X3-C6)
Alarm Valve Model H
AFFF 3FZ-C6 Low Temperature Foam

Home / Products & Solutions / Monitors / Monitor – VAJRA331-S (Oscillating Monitor)

Monitor – VAJRA331-S (Oscillating Monitor)

Monitor VAJRA-331 mounted on water powered Oscillating Unit, transforms the manual Monitor into an Oscillating Monitor.

The unit is suitable for use in high risk areas such as tank farm facilities, aircraft hangars, offshore, refineries, chemical plants, and heliports. The Monitor possesses several design features that provide ease of operation, minimum maintenance and resistance to corrosive environments. Oscillating Monitor Vajra331-S is UL Listed.

DESCRIPTION

Cast Bronze Construction
0 to 120° Oscillating Angle adjustable in 6 steps anywhere within 360°
Water Driven wheel drives the oscillating mechanism
No external wiring or hydraulic control required
Double Row of SS ball bearing & grease fittings
Max operating pressure 12 bar (175 psi)
Flow up to 1000 GPM
Can be connected to Monitor Nozzle with or without pick-up tube for foam concentrate.
Approvals: UL Listed

Product Catalogue

Installation Manual

UL Approval Certificate

Product Catalogue

Installation Manual

UL Approval Certificate

PRIVACY POLICY
TERMS & CONDITIONS
LIMITED WARRANTY

© 2024 HD Fire Protect Pvt. Ltd. All Rights Reserved
CIN: U29270MH1997PTC107536, Email: info@hdfire.com

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Special Projects

In addition to the design and manufacture of standard fire-fighting products, we can also provide customised and bespoke engineered systems to meet individual customer needs or applications for special projects. Special units and skids are made on demand according to your specifications. Our technical service and engineering teams can assist you on special project requirements for various fire-protection and related applications. From initial concept and design to commissioning and on-site assistance, we can offer our support
One such example was use of Varsha Nozzles for sound suppression application in ISRO rocket launch station. Our Varsha nozzles were used for excessive sound suppression during the GSLV Mark III launch. Acoustic sound suppression was developed by ISRO in order to suppress large decibel sound by attenuating noise using water quenching method. Selection of HD Varsha Nozzles was made to ensure that water jet from all ends meet at the definite points of launch pad. Extensive performance tests of Varsha nozzles were carried out in Jalgaon.

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Data Centers

Uptime of Data centers remains critical to most of the businesses today due to cloud-based models. Data centers and server rooms can consist of very costly as well as fragile devices – responsible for backing-up several critical industries. Any problem or down time can be extremely problematic to business continuity of many industries. Therefore automatic and fast-acting fire fighting systems are ideal for such applications.
Data centers and server rooms are typically protected by “total-flooding” clean agent inert gas systems. Inert gas fire suppression agent is made up of 100% argon, nitrogen, or mixture of both and/or CO2. Most popular being the IG-541 system, consisting of 52% Nitrogen, 40% Argon and 8% Carbon Dioxide. These inert gasses are non-reactive to chemical interactions, making them exceptionally safe and effective for putting out fires in data centers. IG-541 extinguishes the fire by reducing the residual oxygen concentration to a level that no longer supports combustion.
Alternately, even a Single or Double-Interlock Pre-Action system can be effectively used in protection of data centers and server rooms, in cases where sprinkler system needs be used with multiple detection mechanisms.
Protection of stand-alone electrical cabinets and machines can be done with CO2 based automatic fire suppression systems like HD-RAKSHAK, a system within the electrical cabinet itself, close to circuits where a fire can occur. The fire detection tubing actuates the system and instantly floods the entire cabinet area with CO2 extinguishing agent.

Commercial & Residential Buildings, Hotels and Airports

The automatic wet pipe fire sprinkler system is most common type of sprinkler system installed in buildings. Alarm valves act as check valves and to give an alarm in case of fire. The alarm is through water motor gong audible alarm bell or through a signal from pressure or flow switch.
This applies to commercial buildings, hotels, meeting rooms, logistics areas and production buildings or warehouses. In case of fire, the sprinkler system is automatically activated during the initial phase, thus preventing the fire from spreading. Sprinkler systems are designed in accordance to NFPA 13.
The pre-action system is used when it is required to have two triggers in order to start water flow through the sprinkler system. It greatly helps that the pre-action fire sprinkler can be set to prevent water from spouting in case of a false alarm or a mechanical failure. The pre-action system is good for use in places where the sprinklers are necessary in case of actual fire only so there is no water damage of any items in building due to inadvertent opening of sprinklers.

Power Plants

Power plants are characterized by their complex systems consisting of many high-risk areas and therefore reliable fire extinguishing systems are essential to ensure the safety in such places.
Steam and gas turbo generators operating at high temperature and speed contain large quantities of lubricating oil and constitute to a major risk of fire. Deluge water spray systems are commonly used in the protection of such machines.
Coal is transported on encased conveyor belts that run across coal processing stations. Fire detection and medium velocity automatic deluge water spray systems are most suitable for protection of coal conveyor belts.
Pre-action water spray systems are best suited for turbine fire protection because of their high assurance against inadvertent discharge
In certain risk areas, fire-fighting foams are added to deluge systems to reinforce the fire-suppression effect.
High-velocity water spray nozzles for protection of fixed hazards such as transformers, circuit breakers, turbo alternators, lube oil systems, oil fired boilers, and similar hazards.
Outdoor oil-filled transformers containing over 500 gallons of oil should be protected by automatic deluge water spray systems.
Fixed water spray systems are designed as per NFPA 15.

Oil & Gas, Petrochemical

Deluge water spray fixed systems for cooling of storage tanks, bullets, spheres, structures, and flammable liquid storage areas. These systems are designed as per NFPA 15. HD deluge valves offer reliable and robust solutions. Deluge valves can be operated by manual, hydraulic, pneumatic or electric trims. HD medium velocity nozzles come in a combination of k-factors and spray angles to offer effective spray pattern for cooling applications.
Fixed foam systems for open top floating and cone roof flammable liquid storage tanks. These systems are designed as per NFPA 11. HD foam chambers and rim seal foam pourers cover a wide range of flow rates and offer effective foam discharge solutions, making these ideal systems for storage tank applications.
Foam bladder tank systems provide accurate, dependable, and cost-effective foam fire protection for a variety of flammable/combustible hazard areas, with no external power other than water pressure. Water is applied to the outside surface of the bladder, displacing foam the concentrate inside the bladder, which then is injected into the water stream.
Foam-water sprinkler systems for flammable liquid storage and handling areas. These systems are designed as per NFPA 16. Foam sprinkler systems are more effective than a water-only system when evaluated for the same risk. They provide for actual extinguishment of the fire and a lower water demand.
Custom engineered foam systems are ideal for foam proportioning applications for a range of foam discharge.
Range of monitors is used in petrochemical storage and refineries.

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