What the DRB-J Does
The DRB-J is an electric grease pump built for dual-line jet lubrication. It meters grease to spray nozzles that apply a thin film onto open gears, girth gear and pinion drives, support rollers, slide guides and crane travel wheels. Compressed air at the nozzle atomizes the grease into a fine mist, so the coating reaches tooth flanks and rails without manual brushing. Because the film is renewed while the drive turns, the tooth flank keeps a continuous boundary layer instead of the heavy smear left by hand brushing. Typical sites are cement kilns, dryers, ball mills, crushers and port cranes. For enclosed-line circuits, compare the DRB-L electric grease pump. Send a quote request with your point count and line length.
Key Specifications
Ratings below apply to both models unless a row states otherwise.
| Item | Value |
|---|---|
| Max pressure | 10 MPa (100 bar / 1,450 PSI) |
| Relief valve | adjustable 0-10 MPa |
| Flow | fixed 60 or 195 ml/min |
| Tanks | 16 or 26 liters |
| Motors | 0.37 kW (100 r/min, ratio 1:15) or 0.75 kW (75 r/min, ratio 1:20) |
| Power | 380V AC three-phase |
| Pump outlet | G1/2 or M14 x 1.5 |
| Grease | NLGI 0 to 2 (penetration at least 220) |
| Temperature | -20 to +80 C |
| Air at nozzles | 4-6 bar |
| Weight | 140 kg or 210 kg |
Models
Two fixed-output versions cover most jet circuits.
| Model | Flow | Tank | Motor | Speed | Weight |
|---|---|---|---|---|---|
| DRB-J60 | 60 ml/min | 16 L | 0.37 kW | 100 r/min | 140 kg |
| DRB-J195 | 195 ml/min | 26 L | 0.75 kW | 75 r/min | 210 kg |
How Jet Lubrication Works
The pump feeds two main lines. Dual-line distributors meter grease to each point in sequence. At each nozzle, compressed air at 4-6 bar shears the grease into a mist that coats the tooth flank or rail. The air stream does the atomizing work: grease leaves the nozzle port as a coarse ribbon, then the high-velocity air breaks that ribbon into droplets fine enough to wet the surface without running off. A reversing valve alternates the two lines so every distributor completes its cycle. The relief valve caps pressure at the set value and returns excess grease to the tank. The motor is unidirectional: check the arrow plate at commissioning and swap two supply phases if rotation is wrong, because reversing the pump eccentric drive damages it.
Control Options
Manual push-button running suits simple sites with one operator walk-round. The EB electric control box adds a 1-999 minute timer, low-level alarm and fault shut-down with volt-free contacts for PLC. Cycle counts and run reports stay at the controller, so the panel can be read without opening the pump. Wire the pump motor through a dedicated three-phase breaker sized to the motor rating, and keep the control cable in a separate gland from the motor supply so timer signals are not disturbed by switching noise. For many small points on one machine, a DDB multi-point grease pump may suit better than a jet system. Send a quote request to match the control type to your circuit.
Reducer Care and Checks
The gear reducer runs in an oil bath of viscosity grade 220 gear oil. First change at 200 running hours, then every 200 hours or six months, whichever comes first. Drain the oil while the reducer is still warm so suspended wear particles leave with the flow, and refill to the center of the sight glass, not above it, because overfilling raises bath churn and oil temperature. Monthly walk-round: nozzle spray pattern, line pressure, tank level, pump noise. Never run the tank dry. Clean nozzles with a soft brush, never wire, because wire scratches the orifice and spoils the spray pattern. Refill with clean grease of the same grade and keep the lid closed to stop grit entering the tank.
Frequently Asked Questions
What is jet lubrication?
Grease metered to nozzles where compressed air atomizes it onto open surfaces.
Which models are available?
DRB-J60 and DRB-J195 with fixed 60 or 195 ml/min flow.
Is the flow adjustable?
No, output is fixed; distributors set the dose at each point.
Why is rotation direction critical?
The eccentric drive only works one way; reverse running damages the pump.
What if the motor runs backwards?
Swap two supply phases after checking the arrow plate.
Which grease grades are suitable?
NLGI 0 to 2 with penetration of at least 220.
How often is the reducer oil changed?
At 200 hours first, then every 200 hours or six months.
Can it serve enclosed bearings?
Possible, but the DRB-P electric grease pump usually fits enclosed points better.
What are signs of a blocked nozzle?
Uneven spray pattern and pressure rise on that line.
Who builds this pump?
IsoHiTech Lubrication Systems, founded in 2023, engineering since 2006, builds and supports every unit. Email inquiry@isohitech.com for specifications and a quotation.
