Modular Flexible Diesel Fire Fighting System Pump Wilo SiFire EN

• Mains connection 3~400 V, 50 Hz (1~230 V, 50 Hz for the control panel of the diesel pump)
• IE-equivalent standard motors, diesel motor with direct injection or turbo diesel motor with air or water cooling
• Max. ambient temperature +4°C to +40°C (+10°C to +40°C, if a diesel pump is installed)
• Max. fluid temperature +40°C
• Max. operating pressure 10 or 16 bar
• Max. inlet pressure 6 bar
• Volume flow 10 m³/h to 750 m³/h
• Max. delivery head 128 m
• Nominal connection diameters on the pressure side DN 65 to DN 250
• Nominal connection diameters on the intake side DN 50 to DN 200
• Switch cabinet protection class IP54
• Main/standby pump with horizontal base plate in accordance with EN 733
• With epoxy resin painted piping and hydraulic connections
• Permitted fluids:Note on fluids: Approved fluids are generally waters which do not attack the materials used, neither chemically nor mechanically, and do not contain any abrasive or long-fibre constituents. System in accordance with EN 12845
  • Non-aggressive, clean water
  • Fire water

For the pump with a horizontal base frame, depending on the model

• Impellers made of bronze CuSn10 or CuAl10Fe5Ni5 or stainless steel AISI 316/ 1.4401
• Pump housing made of grey cast iron EN-GJL-250
• Shaft made of stainless steel AISI420/1.4021 or AISI 431/ 1.4057
• Neck rings made of stainless steel AISI316L/1.4409 or bronze

For the jockey pump

• Impellers made of stainless steel AISI 304/ 1.4301
• Pump housing made of stainless steel AISI304/1.4301
• Shaft made of stainless steel AISI 304/ 1.4301
• O-ring seals made of EPDM

• Base frame: Manufactured from profiles consisting of electro-galvanised steel with brackets for the switch cabinets and the outlet manifold. Special square holes at the bottom for forklift trucks, as well as integrated hooks for lifting slings. Side profiles at the top on each side to enhance the rigidity of the system when moving and lifting.
• Plastic cover at the rear which provides visual access to the valve position and pressure gauge.
• Pipework: Complete pipework with flanges made of epoxy resin painted steel, suitable for the connection of all common piping materials; the dimensions of the pipework must correspond to the overall hydraulic performance of the pressure boosting system
• Pumps: 1 or 2 pumps with horizontal base frame - EN 733 - with spacer coupling, electric or diesel motor.
• • Back-pull-out model to ensure the internal parts of the pump are easy to access without having to move the motor or piping.
• Valves: The main pumps are fitted with a shut-off valve and non-return valve on the discharge side, both of which are painted with epoxy resin and adapted for a flange connection.
• Diaphragm pressure vessel: Diaphragm pressure vessel 20 l/PN16, on the discharge side of the jockey pump, with drain plug.
• Tank: The fuel tank is made of metal painted with epoxy resin and is located behind the bracket of the switch cabinet
• Sensors and display: 2 pressure switches, 2/16 bar per pump, on the discharge side, for activating the pump start via the SCFire controller and regulator. The discharge side pressure gauge (∅ 63 mm) is located in the middle of the rear panel.
• Controller: The system is equipped as standard with a separate switchgear/control device (SC Fire) for the electric or diesel motor and a switchgear/control device for the jockey pump.

• Factory-mounted, ready-for-installation pressure boosting system, which has been checked for functionality and impermeability
• Installation and operating instructions
• Required accessories on request

Inlet pressure

The maximum inlet pressure must be taken into account when designing the system configuration (see Technical data). The maximum permissible inlet pressure is calculated from the maximum operating pressure of the system minus the maximum delivery head of the pump at Q = 0. For sprinkler systems in accordance with EN 12845, the water pressure should not exceed 12 bar. In sprinkler systems with a pronounced slope, in which the difference in height between the highest and lowest sprinkler is more than 45 m, the water pressure can be higher than 12 bar at the pump outlet or in the piping, provided that all of the system components are designed for this pressure level.

Installation of the pressure boosting pump under suction conditions.

For each main pump, it is necessary to install a supply tank with connection to the discharge pipe above the pump.

Volume flow

Up to 750 m³/h (208 l/s) system configuration for each main pump.

Operation

The operating logic for the fire extinguishing unit is based on the cascade calibration of the pressure switches for starting the pump.

The jockey pump is started and stopped automatically by a pressure switch. It is designed in such a way that not only individual sprinklers are supplied with fluid and pressure, but the entire system. This ensures the main pump is prevented from being started and that the system remains pressurised. If a lower pressure value is caused by the demand for water, which is not compensated by the jockey pump, the main and standby pump are started one after the other. The system starts automatically, it can be stopped manually using the switch on the front of the control panel.