1. Product Introduction
The EDJ series is a packaged fire pump system commonly used in automatic fire water supply systems. It includes a main pump (driven by an electric motor), a standby pump (driven by a diesel engine), and a jockey pump. This model comes with a separate controller or one mounted on the skid, and it also includes discharge valves, a common header, and various accessories.
2. Working Principle
Typically, the pipeline network pressure is maintained between low pressure P1 and high pressure P2. When the pressure drops below P1, the pressure maintaining pump starts automatically and continues until the pressure rises to P2. Due to pipeline leakage, the pressure gradually decreases to P1 again, prompting the pressure maintaining pump to start once more. This cycle ensures the pressure remains between P1 and P2. If the pressure drops further to P3 due to increased water consumption, the electric pump starts to raise the pressure to Pw. In case of power failure or electric pump failure, the diesel pump will activate automatically to restore the pressure to Pw. The pump should be manually stopped after human evaluation, except during automatic switching.
3. Each Pump Information (E+D+J) & Controller Information
Diesel Engine Pump Specs
Diameter of pump outlet: DN80–800mm
Pump flow range: Q ≤ 11600 m³/h
Pump lift head range: H ≤ 200m
Pump working pressure: P ≤ 2.5MPa
Pump working temperature: T ≤ 105°C
Pump working voltage: U = 380V, 6kV, 10kV
The diesel engine is mounted on a base with anti-vibration rubber pads, and the pump is directly coupled to the engine via a flexible coupling. The diesel engine can be from brands like Cummins, Deutz, Perkins, or domestic Chinese brands such as Shangchai and Yuchai. It includes components such as an alternator, starter motor, fuel system, lubrication system, and exhaust system.
4. Electric Motor Pump and Jockey Pump
The electric pump is a horizontal split case centrifugal pump. We can also offer end suction pumps or horizontal multi-stage pumps based on client specifications. The motor is a squirrel cage industrial type, foot-mounted, and suitable for three-phase operation with the required horsepower rating. The jockey pump specifications are selected according to the diesel engine and electric motor pump requirements.
5. Controller Information
The control panel is made of mild steel and coated with red epoxy powder. It is rated IP54 and complies with applicable standards (NFPA). Manual starting is possible by setting the black 2# three-way switch to "Manual," allowing the use of the "Manual Start" and "Manual Stop" buttons. When set to "Stop," the diesel pump cannot operate. For automatic starting, the switch should be in "Auto," which allows the diesel pump to start upon receiving a fire alarm signal. Pressure controllers on the common outlet pipe manage pressure control. Two 1" 1.5 square signal lines connect the pressure controller's normally open contacts to terminals No. 111 and 127. A low-pressure threshold triggers the pump, while a high-pressure threshold stops it. If the main electric pump is overloaded, the diesel engine pump will start automatically.
4. FAQ
1. Q: Are you a trading company or manufacturer?
A: We are a professional manufacturer with over 18 years of experience in China, operating our own factory.
2. Q: What workshops do you have?
A: Our production includes casting, machining, lathe processing, heat treatment, assembly, and testing. We welcome visitors anytime.
3. Q: What is your pricing policy?
A: We offer factory prices with a commitment to quality for long-term partnerships.
4. Q: What if there is an issue with the pump or parts under warranty?
A: Please inform us promptly and provide photos. We will respond immediately with solutions.
5. Q: I’m unsure which pump model we need, can you help?
A: Yes, please share your specific requirements, including liquid type, flow rate, and head. Our engineering team will calculate and recommend the most suitable model for you.
Zhoushan Dinghai Jinxing Plastic Machinery Factory , https://www.jinxingscrew.com