The normal speed self-check simulates the actual operation of firewater supply within a certain time frame. It tests the entire process of the fire pump starting and operating normally. However, improvements are needed in the pipeline design. It is crucial to prevent electromagnetic valve failures on the bypass pipeline; they must be opened during self-check and promptly closed after completion. The low-speed self-check does not require modifications to the fire pump's pipeline but only checks one phase of the normal operating condition of the fire pump. Fire pumps can be categorized into direct and indirect start, with those of higher power requiring indirect start. Indirect start methods include Y/Δ reduced voltage starting, autotransformer reduced voltage starting, and soft starter starting. During the operation of the fire pump, the soft starter start is just an early phase of the fire pump's operation, followed by normal operation. Frequency conversion methods also do not reach the industrial frequency stage. However, the low-speed self-check still has a certain effect on preventing rust of the fire pump. comparatively, it features low-frequency drive, low-speed rotation, and low power consumption of the equipment.
Fire pumps are designed for pumping various liquids and are the ideal choice for creating leak-free, pollution-free civilized workshops and factories. They are commonly installed on fire trucks, fixed fire extinguishing systems, and other fire protection facilities, serving as pumps for transporting water or foam solutions and other liquid fire extinguishing agents. Fire pumps are widely used in environmental protection, water treatment, and fire protection departments.

The ISG fire pump type single-stage vertical pipeline centrifugal pump combines the performance parameters of the old-type centrifugal pump and SG pipeline pump, cleverly designed on the basis of general vertical pipeline pumps. It meets the requirements of the new National Mechanical Industry JB/T53058-93 standard and is designed and manufactured according to the international ISO2858 standard. This series features energy saving, low noise, and reliable performance. Additionally, according to the different operating temperatures and media in the application, the material and structural changes of the flow section are designed to include the IRG type hot water pump, the IHG type stainless steel pipeline pump, and the YG type explosion-proof pipeline centrifugal pump, all with the same performance parameters.

Product Overview
The ISG fire pump type single-stage vertical pipeline centrifugal pump combines the performance parameters of the old centrifugal pump and SG pipeline pump, ingeniously designed based on the general vertical pipeline pump. It meets the standard requirements of the new national machinery department JB/T53058-93 and is designed and manufactured according to the international ISO2858 standard. This series boasts advantages such as energy saving, low noise, and reliable performance. Depending on the different application temperatures and medium, the material and structural changes in the flow section are designed to include the IRG type hot water pump, IHG type stainless steel pipeline pump, and YG type explosion-proof pipeline centrifugal pump, all with the same performance parameters.
Usage
1. ISG vertical pipeline centrifugal pump, designed for conveying clean water and other liquids with similar physical and chemical properties to clean water. Suitable for industrial and urban water supply and drainage, high-rise building pressure boosting, garden irrigation, fire protection pressure boosting, long-distance transportation, HVAC cooling and heating cycles, bathroom hot and cold water circulation boosting, and equipment matching. Operating temperature T < 80°C.
2. The IRG type hot water pipeline circulating pump is widely used for: energy, metallurgy, chemical industry, textile, papermaking, as well as for high-temperature hot water boosting and circulation for hotels and restaurants, and for circulating pumps in urban heating systems. The IRG type is suitable for temperatures T < 120°C, while the GRG type is suitable for temperatures T < 240°C.
3. IHG Vertical Chemical Centrifugal Pumps for transferring liquids without solid particles, corrosive, and with a viscosity similar to water. Suitable for industries such as petroleum, chemicals, metallurgy, power, papermaking, food, and synthetic fibers. Operating temperature range: -20℃ to 120℃.
4. YG type vertical pipeline centrifugal oil pump, suitable for conveying gasoline, kerosene, diesel and other petroleum products; the temperature of the conveyed medium ranges from -20℃ to +120℃.
Work Conditions
1. Pipeline pump suction pressure ≤ 1.0 MPa, or system working pressure ≤ 1.6 MPa, meaning suction pressure + pump head ≤ 1.6 MPa; static pressure test pressure of the pump ≤ 2.5 MPa. Please specify the system working pressure when placing an order. If the working pressure of the pump system exceeds 1.6 MPa, it should be mentioned separately at the time of ordering to ensure cast steel material is used for the overflow and connection parts during manufacturing.
2. Environmental temperature < 40°C, relative humidity < 95%.
3. The volume content of solid particles in the conveyed medium does not exceed 0.1% of the unit volume, with particle size greater than 0.2mm. If the medium contains fine particles, please specify at the time of ordering to facilitate the use of wear-resistant mechanical seals.
1. The pump features a compact structure, small size, and attractive appearance. Its design ensures minimal footprint for installation, and with a protective cover, it can be used outdoors. 2. The impeller is directly mounted on the motor shaft, ensuring the pump's concentricity and thereby enhancing its operational stability and extending its service life.
3. The shaft seal utilizes mechanical seals or a combination thereof, incorporating high-quality alloy sealing rings, which enhance the wear resistance of the seal and effectively extend its service life.
4. Easy installation and maintenance without the need to dismantle the piping system. The pump's inlet and outlet have the same diameter, simplifying pipeline connections. 5. The pump can be operated in series or parallel configurations according to the requirements of flow rate and head.
6. The intake and exhaust outlets can be installed in several different directions—0°, 90°, 180°, and 270°—to accommodate various connection scenarios as needed.
7. Pump head can be adjusted by increasing or decreasing the number of pump stages, combined with the adjustment of the impeller diameter, without altering the installation footprint.
The automatic start of the sprinkler pump is achieved by the glass spheres in the nozzle of the pipeline of each protection zone bursting under high temperature, which causes the pipeline water flow to start, thereby triggering the alarm valve pressure switch to activate, ultimately reaching the purpose of automatically starting the sprinkler pump. The water flow indicator联动 module or the alarm valve pressure switch wiring is connected to the control room, allowing the fire control room to accurately reflect its action signal. Additionally, the control room should be able to directly control the start and stop of the sprinkler pump.