DDRB Multipoint Grease Pump

DDRB Multipoint Pump in Centralized Grease Systems

What DDRB Does

DDRB is a multipoint reciprocating grease pump: one motor and drive wheel actuate several independent pump elements mounted on a common manifold. On each forward stroke, each element displaces a fixed volume of grease into its outlet port; check valves hold line pressure on the return stroke while the chamber refills from the reservoir. Because each element can feed a separate main line or zone, DDRB replaces multiple small pumps on one machine frame or in one lube room.

At 32 MPa, DDRB generates enough pressure to operate dual-line metering blocks over long pipe runs, or to charge progressive divider stacks and SSV manifolds on large hosts. Typical plant working pressure stays in the 20–35 MPa band depending on NLGI grade, ambient temperature, and line length.

Stroke Cycle (One Pump Element)

1. Fill — grease enters the element chamber from the tank through suction path; follower plate (if fitted) maintains head on thick NLGI #2.
2. Forward stroke — drive wheel pushes the working piston; outlet check valve opens; fixed ml volume enters the connected main line.
3. Return stroke — piston retracts; outlet check closes; inlet path refills chamber for next cycle.
4. Controller — timer or machine interlock sets run duration; pressure relief protects pump if a line blocks.

With 22 strokes/min and 10.5 ml/stroke on one element, a single outlet delivers roughly 13.9 L/hour—useful for sizing whether a 10 kg or 30 kg tank matches your refill interval.

Typical System Layouts

1. Dual-line plant — DDRB → main lines A/B → DR45 or SA-V reverse valve → VSG / ZVB / VSL blocks → bearings. One DDRB element may feed each header zone on very large spreads.
2. Progressive machine circuit — DDRB → single header → progressive manifolds (DJF1000 / DJF2000 / DJF3000 or SSV) → way covers, pins, and bushings. Monitor cycle pin or limit switch on last block.
3. Multi-zone progressive — several DDRB elements each feed a separate progressive chain (e.g. turret, boom, and base on a crane).
4. Long-distance supply — 30 kg tank and higher ml/stroke options reduce refill frequency when the pump sits remote from the host.

Industry Applications

• Metallurgy & steel — rolling mill stands, continuous casters, descaling equipment
• Mining — crushers, conveyors, apron feeders, shovel swing bearings
• Forging & presses — slide guides, ejector pins, high-load bushings
• Rubber & construction — mixers, extruders, mobile crane booms

For installation support on new builds, see lubrication service and heavy equipment lubrication system hub pages.

DDRB vs BS-B vs FS — When to Choose DDRB

Choose DDRB when you need several feed lines from one skid at 32 MPa. Step up to BS-B when the entire plant runs on dual-line headers with 40 MPa and 60 kg+ daily consumption. Use FS for smaller machine-mounted progressive only.

Five-Step Selection

1. Count points and dose — list each bearing with ml/cycle from OEM chart or bearing lubrication calculator; sum peak demand per cycle.
2. Choose ml/stroke per element — pick 1.8–10.5 ml so one stroke supplies the connected header without excessive over-lubrication; match pump run time to production schedule.
3. Confirm pressure class — 32 MPa rating must exceed downstream block cracking pressure plus line losses (long Φ8 mm runs and NLGI #2 in cold plants need margin).
4. Reservoir — 10 kg for moderate single-shift use; 30 kg for multi-shift or weekly refill targets. Estimate: (total ml/min × 60 × run hours) ÷ 1000 vs usable tank volume.
5. Pair valves and blocks — dual-line needs changeover, end-of-line pressure switch, and block family rated for your pressure; progressive needs cycle indicator or electric switch on last block for fault stop.

Commissioning & Grease Fill

1. Mount pump level, rigid frame, and vibration isolation per OEM drawing (Section 2 shows dimensions).
2. Fill with specified NLGI #0–#2 grease only—no oil or mixed grades.
3. Run several cycles with outlets capped to prime each element; verify even stroke sound.
4. Connect main lines; open branches progressively; purge air at highest points and block bleed screws.
5. For dual-line, confirm DR45/SA-V switches at set pressure; for progressive, confirm indicator pin completes one full travel per pump run.
6. Set controller interval; log first-week consumption to validate tank size.

Pump Element Service

Section 2 on this page covers removal and installation of DDRB pump elements—critical steps include tilting the piston ~30° when disengaging from the drive wheel and never inserting the working plug during removal (prevents piston damage). After element swap, purge air on the affected branch before returning to automatic cycle. Adjustable pistons and check valves are shown in Section 2 diagrams—replace seals when stroke volume drops or suction cavitation is heard.

Maintenance Schedule

• Each shift: check reservoir level and abnormal noise from drive wheel
• Weekly: inspect outlet fittings for leaks; verify controller cycle count
• Monthly: clean fill port strainer; sample grease for contamination in dusty plants
• Quarterly: inspect pump element seals; verify relief valve setting
• Annual: replace worn elements; review line hoses and grease filter if fitted on fill path

Troubleshooting

Ordering Checklist

Provide: outlet count (1–14), ml/stroke per element, tank size (10 / 30 kg), voltage, intended system type (dual-line / progressive), NLGI grade, ambient temperature range, and paired block models (VSG, ZVB, DJF, etc.). IsoHiTech application engineering can confirm BOM against Related Products on this page.

Related Products

• BS-B dual-system grease pump — larger integrated dual-line skids
• FS grease pump — compact progressive-friendly pumps
• DDRB-N multi-point module — expandable multipoint builds
• Installation and commissioning service

Before you buy: read our central lubrication system guide.