Vertical Motor Lubrication Pump — DCD Series Circulating Oil Unit
The DCD vertical motor lubrication pump (DC series electric lubrication pump) mounts a vertical gear pump on a metal reservoir for circulating oil and centralized lubrication skids. Compact vertical layout saves cabinet floor space; motor and pump column dip into the tank for reliable suction and strong self-priming.
Tank sizes: 3 L, 6 L, and 9 L metal reservoirs (FAQ also lists 4 L / plastic options on request). Flow classes: DCD2.5 ≈ 250 ml/min, DCD5 ≈ 500 ml/min, DCD8 ≈ 800 ml/min—select per loop flow and heat load. Pressure options 2 MPa or 4 MPa. Supply AC 380 V standard on listed models; 110 V / 220 V available. Control: typically PLC or machine controller interlock.
Viscosity range 30–2500 cSt covers way oil through heavy circulating fluids. Pair with metering units, manifolds, and single-line oil systems. Hub: lube oil pump · trochoid pump (alternative geometry).
- Parameter
- Product Video
DCD Model Matrix
| Model | Discharge | Reservoir | Pressure | Voltage | Control |
|---|---|---|---|---|---|
| DCD2.5-3L | 250 ml/min | 3 L | 2 or 4 MPa | AC 380 V | PLC |
| DCD2.5-6L | 250 ml/min | 6 L | 2 or 4 MPa | AC 380 V | PLC |
| DCD2.5-9L | 250 ml/min | 9 L | 2 or 4 MPa | AC 380 V | PLC |
| DCD5-3L | 500 ml/min | 3 L | 2 or 4 MPa | AC 380 V | PLC |
| DCD5-6L | 500 ml/min | 6 L | 2 or 4 MPa | AC 380 V | PLC |
| DCD5-9L | 500 ml/min | 9 L | 2 or 4 MPa | AC 380 V | PLC |
| DCD8-3L | 800 ml/min | 3 L | 2 or 4 MPa | AC 380 V | PLC |
| DCD8-6L | 800 ml/min | 6 L | 2 or 4 MPa | AC 380 V | PLC |
| DCD8-9L | 800 ml/min | 9 L | 2 or 4 MPa | AC 380 V | PLC |
Heavy-Duty Metal Reservoir
Stamped metal tanks use thicker material than light plastic sumps—rated to withstand shop handling and transport shock (design tested beyond 60 kg point load on cover per factory spec). Reduces flex and seam leaks on circulating hot oil.
Serviceable Suction Filter
Reservoir cap integrates a filter element with quick-open cover for element change without draining the full tank—important on CNC loops with fine clearance bearings.
Gear Pump Head
Precision-machined gear set delivers stable flow and high pressure for long PLC-run cycles. Replace gear packs as wear items on multi-shift plants.
Related Product
Vertical vs Horizontal Pump Mount
Vertical motor pumps place the gear set at the tank bottom—ideal when oil must drain back by gravity and air bubbles rise away from the suction eye. Common on machine-tool circulating systems, hydraulic lube loops, and custom skids where ceiling height allows a tall tank.
Circulation vs Single-Line Duty
- Circulation / cooling loop — choose DCD5 or DCD8 (500–800 ml/min) to move oil through filters, coolers, and bearings continuously.
- Intermittent centralized lube — DCD2.5 (250 ml/min) with PLC timer may suffice for SLR networks with SBJ meters.
Selection Steps
- Estimate total flow (bearing leakage + filter bypass + cooling).
- Pick DCD2.5 / 5 / 8 class; verify 2 vs 4 MPa against filter and cooler ratings.
- Choose 3 / 6 / 9 L tank for hold-up volume and thermal stability.
- Confirm voltage (110/220/380 V) and PLC I/O for run, alarm, and low level.
- Specify oil viscosity at operating temperature (30–2500 cSt envelope).
Integration with Machine PLC
DCD units are typically controlled by the machine PLC—run when spindle or hydraulics are active, interlock on low level and filter ΔP. IsoHiTech can supply level switches and pressure transducers on request.
Before you buy: read our complete guide to grease pumps.
Primarily industrial oils from about 20–1500 cSt (page spec up to 2500 cSt on custom builds). Not for NLGI grease—use grease pumps instead.
Standard table shows AC 380 V; 110 V and 220 V motors are available on request. Match motor nameplate to your panel.
Standard metal tanks 3, 6, 9 L (FAQ mentions 4 L and plastic tanks as options). Larger hold-up improves temperature stability on circulation loops.
250 ml/min (DCD2.5), 500 ml/min (DCD5), 800 ml/min (DCD8)—and higher on engineered circulation skids. Size from heat rejection and bearing flow budget.
Both—high flow (DCD5/8) suits circulation/cooling; DCD2.5 suits smaller centralized SLR systems with metering units and manifolds.
Typically via PLC on the host machine; integrate with timer or custom HMI for non-PLC retrofits.