The SC7H Four-Valve Platform: Built for the 120–132KW Operating Range

Small and medium facilities in the 100–150KW demand bracket face a consistent selection difficulty: standard 100KVA units fall short when air conditioning systems, lifting equipment, and production line motors run concurrently, while 200KVA units carry a higher capital cost and fuel overhead than the application actually requires. The CDS165KVA 165KVA SDEC diesel generator targets this capacity gap directly — a 120KW prime output scaled for 5,000–8,000m² commercial centers, township hospitals with imaging and surgical load, and small processing factories with two to three active production lines. As a purpose-built 150KVA prime power generator, it provides the output ceiling these applications need without the excess capacity that drives up procurement and running cost.

The SC7H205D2 diesel genset engine is a 6.44L inline six-cylinder unit with 105mm × 124mm bore and stroke, a 16:1 compression ratio, and a four-valve cylinder head design — two intake valves and two exhaust valves per cylinder versus the two-valve layouts found on older domestic engine platforms in this power range. Four-valve head geometry increases the intake valve flow area in each combustion cycle, supporting more thorough fuel-air mixing and measurably lower consumption at partial load: factory-rated specific fuel consumption reaches as low as 195g/kW·h at full prime output, among the leading figures for domestic 150KVA-class gensets. Turbocharged and intercooled intake, combined with a P7100 high-pressure fuel pump and an electronic governor at 1500RPM, delivers a factory-certified standby engine output of 152KW — a 20KW overhead above the 132KW operating standby ceiling that keeps the engine well within its thermal comfort zone during backup activation. Engine oil sump is 20L; Fleetguard factory filter set supports 500-hour maintenance intervals; B10 service life exceeds 15,000 operating hours.

ISO8528 certification covers two distinct classifications for this unit. The 150KVA prime power generator PRP rating (120KW/150KVA) certifies unlimited continuous operation as a facility's primary or supplementary power source, with the 24-hour average load staying below 70% of prime capacity. The 165KVA standby power supply ESP rating (132KW/165KVA) activates only on grid failure, offering a 10% short-duration overload margin within any 12-hour emergency window — sufficient to absorb motor startup inrush from refrigeration compressors, water pumps, and industrial air handling units without load rejection or voltage sag. Standard output: 50Hz/1500RPM, 400/230V three-phase four-wire, power factor 0.8 lagging; a 60Hz/440V variant is available for Southeast Asian and American grid specifications.

The soundproof enclosure is fabricated from 3.0mm cold-rolled steel with double-layer epoxy zinc-rich anti-rust coating — a construction standard suited to long-term outdoor placement in coastal, tropical, and industrial environments with salt air, humidity, and chemical vapors. Multi-layer flame-retardant acoustic cotton, a composite muffler duct, and a large-bore industrial silencer work as independent noise treatment layers, holding the operating noise envelope of this SDEC silent diesel generator to ≤72dB(A) at 7 meters — within the EU urban residential noise restriction and applicable to hospital proximity, downtown commercial zones, and community locations. Double-side maintenance doors and a front tempered glass observation window allow filter changes and routine inspections without removing the canopy housing. The 420L integrated base fuel tank provides over 9 continuous hours at full prime load; an external quick-fill port on the canopy handles daily refueling without opening the enclosure.

The brushless synchronous alternator uses H-class insulation with IP23 standard protection (IP55 optional), vacuum-impregnated full-copper windings, and a digital AVR holding steady-state voltage within ±1% and waveform distortion below 3% — a power quality specification that covers medical diagnostic equipment, PLC-driven assembly lines, and server infrastructure sensitive to voltage fluctuation. The factory-installed Deepsea DSE7320 LCD controller monitors voltage, current, frequency, oil pressure, coolant temperature, and run hours in real time. Automatic start on mains failure, timed cool-down before shutdown, and fault alarm protection are standard controller functions requiring no operator involvement. Reserved space inside the control cabinet accommodates ATS automatic transfer switch installation; an optional 4G cloud monitoring module enables remote start-stop and parameter viewing via mobile or PC.

Technical Specifications

5 Core Competitive Advantages

1. Four-Valve SC7H Engine Head — Better Partial-Load Fuel Economy
The SC7H205D2 diesel genset's four-valve cylinder head improves combustion completeness specifically at partial load — the operating mode most common in commercial and light industrial backup applications where the generator typically runs at 50–80% of prime rating during actual operation. At 195g/kW·h specific consumption at full load, the CDS165KVA 165KVA SDEC diesel generator delivers measurable diesel savings versus comparable two-valve platform gensets over a full service year — a practical operating cost advantage for facilities running the unit as a regular prime or supplementary power source.

2. 16:1 Compression + Optional Dual Preheater — Cold Start Down to -30°C
A 16:1 compression ratio generates sufficient heat during the compression stroke for unassisted cold-start capability at ambient temperatures down to -15°C. An optional oil and water jacket dual preheater extends reliable ignition to -30°C — a critical specification for project installations in northern China, high-altitude mining regions, and Central Asian construction environments where winter ambient temperatures exceed standard cold-start limits for lower-compression gensets.

3. 420L Integrated Tank — 9+ Hours Autonomous Runtime
At full prime load, the 420L base-integrated fuel tank provides more than 9 continuous operating hours without refueling — an important operational buffer for remote construction sites, off-grid rural facilities, and emergency standby installations where fuel delivery cannot be guaranteed within the first hours of an extended outage. The external quick-fill port on the canopy allows daily diesel replenishment without opening the enclosure cabinet.

4. Deepsea DSE7320 + Optional ATS for Unattended Operation
The DSE7320 controller's automatic start-on-mains-failure, timed cool-down, and fault protection functions make this 165KVA standby power supply suitable for fully unattended installation from day one. With the optional ATS automatic transfer switch cabinet, grid-to-generator switching is fully automated — no operator intervention required. An optional 4G remote monitoring module adds real-time parameter access and remote start-stop capability via mobile or PC for multi-site facility managers.

5. Compact 3200×1100×1750mm Footprint + Wide -30°C to +50°C Ambient Range
At 3200 × 1100 × 1750mm and 2200kg, the CDS165KVA has a smaller physical profile than most 150KVA-class competitors — a practical advantage for generator rooms in urban commercial buildings and compact township hospital plant rooms where floor space is constrained. Standard ambient operation covers -30°C to +50°C; optional oversized radiators and dual-stage heavy-duty air filters extend the operating envelope to extreme tropical and open-pit mining environments without structural modifications.

Application Scenarios

The CDS165KVA SDEC silent diesel generator serves the following light industrial and commercial power applications:

• Township hospitals and community health centers — emergency backup for surgical theatres, imaging equipment, and patient monitoring systems
• Small processing factories and machinery workshops — prime power for off-grid plants or supplementary backup for grid-connected production lines
• Downtown commercial plazas and retail streets — standby coverage for elevators, POS systems, lighting, and HVAC during grid outages
• Aquaculture and cold-chain storage facilities — continuous power for aeration, water circulation, and refrigeration systems
• Municipal road and infrastructure construction sites — temporary construction power for machinery, lighting, and site welfare facilities

OEM Customization Service

Jiuan Generator provides full OEM customization for the CDS165KVA 165KVA SDEC diesel generator. Available configurations include ultra-silent canopy upgrades, ATS automatic transfer switch cabinet, 4G IoT cloud monitoring module, custom brand LOGO printing, canopy color specification, and non-standard voltage/frequency configurations for regional grid requirements. All units pass a full-load factory SGS aging inspection before dispatch, with test report provided.