Efficient Consumption and Easy Maintenance:
SEMHAI Engines delivers an extensive range of diesel engines meticulously crafted for stationary applications. Our engines power essential equipment like centrifugal pumps, hydraulic pumps, air compressors, and air generators with unmatched precision. Available in dynamic power ranges such as ION power from 415 kW to 920 kW and ICXN power from 377 kW to 836 kW, all aligned with ISO 3046-1 standards, these engines are engineered to drive centrifugal pumps with variable speeds. The essence of SEMHAI diesel engines lies in their robust design, ensuring reliable and fuel-efficient performance. By promoting long overhaul intervals and extended service life, our engines exhibit optimal power density, seamlessly transforming them into highly efficient and adaptable energy sources.
Performance Features
1. Unmatched Starting Functions: Three Perfect Modes
(1). Manual Start Function: Seamlessly toggle between manual and automatic start through an integrated switch for ease of operation.
(2). Automatic-Manual Functions: With an allowance for three starting attempts, an alarm signals any starter failure. If the engine fails to start after three tries, an automatic exit from the start state ensues. Achieve rated load start within 5-10-15 seconds, tailored to unit capacity, following a successful initial start.
(3). Emergency Manual Direct Start Function: Ensure operation integrity with a reliable manual direct start function in case of self-control device malfunctions.
2. Seamless Automatic Operation: Upon receiving a valid fire signal, the diesel fire pump initiates automatically. In scenarios where the pump fails to start due to disruptions in the fire pump motor's power supply, an automatic switch to the electric pump ensures continuous operation once power normalizes.
3. Automatic Shutdown: The diesel fire-fighting pump intelligently delays and then automatically shuts down once the fire signal ceases, promoting efficient energy management.
4. Battery Self-Charge Function: Enjoy the convenience of automatic battery charging powered by the diesel engine's electrical mains, guaranteeing a seamless start every time.
5. Comprehensive Indicating System: Stay informed and in control with indications for readiness, manual and automatic starts, unit operation and shutdown, battery charging, speed monitoring, and critical alerts like low oil pressure, high water temperature, and low battery voltage.
6. Enhanced Alarm and Protection System: Gain peace of mind with alarms and protective measures against persistent start failures, over-speeding, low lubricant oil pressure, high cooling water temperature, automatic charging device failures, and more.
7. Advanced Display Systems: Access real-time data with displays for engine oil pressure, engine speed, battery charge current, and voltage, ensuring optimal performance monitoring.
8. Direct-Coupled Design: Experience superior performance with a high-flexible coupling directly connecting the diesel engine and water pump on a common channel base. This compact structure ensures reduced vibration, minimal failure rates, and easy on-site installation.
9. High-Pressure and Large Flow Capacity: Tailor your fire safety solutions with our selection of IS series single-stage single-suction, SOW series single-stage double-suction, and SHD series segmental multistage pumps, all designed to meet diverse fire-fighting demands.
10. Adjustable Flow and Working Pressure: Customize performance with diesel pumps equipped with mechanical or electronic speed governors, allowing you to fine-tune engine speed to align pump flow and head with actual requirements.
11. Pre-Heating Device for Water Temperature: Ensure reliability in low-temperature environments with our AC220V cooling water preheating device, maintaining optimal conditions even below 5 ºC.
12. Dual Battery Circuit: Our intelligent design automatically switches to a secondary battery in the event of a failure, ensuring uninterrupted operation.
13. Maintenance-Free Battery: Benefit from the convenience of maintenance-free batteries, eliminating the need for frequent supplemental fluid additions.
14. Automatic Timing Inspection Test: Safeguarding your peace of mind, the fire system is predominantly in a standby mode. Our unit smartly executes device testing under standby conditions, ensuring timely alerts and seamless operation.
Note: Tailor your experience—each of the above functions is selectively available based on your preferences. We're also poised to offer bespoke solutions to meet your specific requirements with precision.
Selection Configuration of Diesel Engine: A curated selection to optimize performance.
1. The Pump: Choose from the robust IS series single-stage single-suction pump, the dependable SOW series single-stage double-suction pump, the efficient SHD series multistage segment pump, or the versatile ZW horizontal self-priming centrifugal pump.
2. The Diesel Engine: Power and efficiency in one.
Internationally renowned diesel engines are at your service. Options include single-cylinder, two-cylinder, four-cylinder, and six-cylinder models with speed ranges of 1500r/min, 1800r/min, 2400r/min, and 3000r/min to suit varied demands.
3. Other Accessories: Enhance functionality with our comprehensive range of accessories, including an advanced filtration system, efficient silencer system, reliable cooling system, ample fuel tank, common channel base, base fuel tank, radiator, battery, and charger.
4. The Control Cabinet: Featuring SBC and PLC programming, sensors, and an automatic control cabinet, designed to provide seamless automation and control.
| Engine Speed |
1500r/min; 1800r/min; 2400/min; 2800/min; |
| Engine power |
24HP-2220HP |
| Pump diameter |
50-500mm |
| Flow range |
10-2000L/s |
| Working pressure range |
0.2-2.2Mpa |
| Temperature range |
Ambient temperature ≤60'C; |
| Ambient atmospheric pressure |
> 90KPa |
| Transmission medium |
Water or other liquids physical and chemical properties similar to water; |
| Seal plumbing parts |
No installment when inlet pressure above 0.03Mpa (G) |
| Engine power selection |
Under non-normal conditions, diesel input power will be less than the rated power, it need to choice higher power diesel engine to support pump to ensure the normal operation |
Experience the unparalleled performance of internationally renowned diesel engines, available in a range of configurations: single-cylinder, two-cylinder, four-cylinder, and six-cylinder options. With a versatile speed range of 1500r/min, 1800r/min, 2400r/min, and 3000r/min, these engines are engineered to meet diverse operational needs with precision and efficiency.
Introducing the SEMHAI Robust Couplings – the epitome of precision engineering. These professional coupling adaptors seamlessly connect diesel engines to pump drives with a sturdy shaft interface, ensuring consistent performance and reliability.
Our cutting-edge coupling adaptors offer a hassle-free installation experience, connecting to standard couplings effortlessly without the need for alignment tools. Constructed from polyamide nylon reinforced with fiberglass, these adaptors provide torsional rigidity and are maintenance-free. Perfectly suited for hydrostatic drives across construction machines, harvesters, and forestry machinery, they are the go-to choice for demanding applications.
The Diesel Plus Fire Pump Controllers from SEMHAI represent the pinnacle of technological advancement in diesel engine control systems. Purpose-built to oversee and monitor 12 or 24-volt diesel fire pump engines, these controllers are crafted to deliver unmatched precision and reliability.
Features
Universal Supply Voltage: A flexible range from 100Vac to 240Vac ensures compatibility with diverse systems.
Dual Output: Easily switch between 12 or 24 Vdc outputs using the intuitive DIP switch.
Communications: Equipped with a USB Port/Drive for seamless connectivity.
Effortlessly Transfer Data: Move your essential data to or from portable USB devices with ease.
Embedded Web Pages*: Direct access to vital information through integrated web interfaces.
Comprehensive System Monitoring: View real-time status, data values, programmed set points, and historical data with ease.
Ethernet* Direct Connection: Enjoy secure and immediate data transfer with a computer.
RS485 Port*: Advanced connectivity for expanded communication capabilities.
MODBUS Communication*: Enhance your system's functionality with the optional COM feature for robust data exchange.
Introducing the innovative New Big Volume Dual Wall Diesel Subbase Generator Fuel Tank, designed for maximum efficiency and durability.
Engine Mounts That Last: Experience superior noise reduction in both mobile and stationary equipment with our robust engine mounts. Crafted from premium industrial-grade materials, these mounts extend the service life of your machinery compared to ordinary mounts.
Optimize performance with our Professional Gearboxes, precisely engineered for direct mounting on diesel engines. Whether it's accelerating or decelerating speed, these gearboxes deliver adaptability across applications. With options for SAE housing and fixed coupling (Rubber Block Drive) or a switchable BD or BDS clutch on the input side, they provide a tailored solution for diverse needs.
Industry - Our pumps are pivotal in boiler feed water systems and cooling systems, ensuring seamless operation and efficiency.
Smelting - Essential for maintaining optimal water circulation and cooling efficiency within smelting operations.
Fire-fighting - Designed for robust performance in fire hydrant systems, sprinkler systems, spray cooling systems, foam systems, and water monitor systems to safeguard properties.
Ocean - Critical for wild water supply systems and island freshwater collection, providing sustainable water solutions in oceanic environments.
Heating - Facilitates reliable and efficient water circulation and cooling systems, crucial for heating applications.
Municipal - Offers dependable emergency drainage and water supply solutions to meet municipal demands during crises.
Agriculture - Supports efficient irrigation and drainage systems, enhancing agricultural productivity and sustainability.
Renowned Professional Cooperation Agencies
Shanghai Semhai Pump Co., Ltd. proudly partners with prestigious and large-scale domestic pump-testing institutions, establishing enduring relationships that ensure excellence in all our endeavors. Our esteemed partners include:
The eminent National Quality Supervision and Inspection Center of Industrial Pumps located in Tiexi District, Shengyang City,
The distinguished Irrigation Machinery Products Quality Inspection Center of Machinery Industrial situated in Zhenjiang City,
The illustrious Ministry of Agriculture, Water Pump Quality Supervision and Testing Center based in Chongqing City,
The prominent Shanghai Mechanical and Electrical Products Quality Inspection Center, right here in Shanghai City, among others.
Audited Supplier 
){kind=link}