Marine Bilge & Cargo Rotary Lobe Pumps
Review rotary lobe pumps for shipboard bilge and cargo transfer, with attention to the liquid handled, wetted materials, changing suction conditions, installation space, and project documentation.
Request Pump SizingDefine Bilge Collection and Cargo Transfer Separately
Bilge mixtures and cargo liquids can differ in composition, viscosity, solids, and operating cycle. Identify the pump’s role and the source and destination of each transfer; review separate duty points if more than one liquid or operating stage is intended.
- Bilge transfer
- Collected water and contaminants. Describe salinity, oil content, cleaning chemicals, sand, fibers, and other debris actually reaching the pump.
- Cargo transfer
- Specified cargo and transfer stages. Provide cargo identity, viscosity at temperature, solids, and the flow and pressure needed for bulk unloading and final stripping.
Wetted Materials, Seals & Abrasive Solids
Review wetted metals, rotor coverings, seals, and O-rings against the full liquid composition and temperature range. Include seawater exposure, cargo constituents, and cleaning fluids; a stainless-steel or duplex grade alone does not establish compatibility for every marine duty.
Describe hard particles separately from soft debris and long fibers. Assess passage geometry, upstream treatment, and replaceable wear components for the proposed model rather than assuming unrestricted solids handling or a fixed service life.
| Review Point | Why It Matters | Data Needed |
|---|---|---|
| Liquid composition | Bilge and cargo fluids may need different material selections | Cargo identity, salinity, oil content, additives, cleaning chemicals |
| Temperature and viscosity | Starting and running conditions affect the pump and drive | Viscosity with units and temperature, minimum start and maximum operating temperatures |
| Solids and debris | Particle shape and loading affect passage and wear | Sand concentration and measurement basis, hard particle sizes, fibers, screening details |
Shipboard Layout & Project Documentation
Provide the mounting envelope, connection positions, available drive, and access route for installation and removal. Compare proposed drive and reducer layouts using dimensioned drawings, including cover clearance, lifting space, and maintenance access.
Supply the vessel or shipyard’s class, electrical, material, and documentation requirements. Confirm which approvals, certificates, inspection records, and equipment are included in the actual offer; the marine application description does not establish a particular class approval.
Changing Levels, Priming & Final Stripping
Provide the source level range, pump elevation, and suction pipe or hose layout. As bilge wells or cargo tanks empty, gas or air entry can interrupt supply; priming and gas handling must be assessed for the selected pump and installation rather than a general suction-lift figure.
Review flow, discharge pressure, and startup conditions for each transfer stage. Confirm valve layout, pressure protection, seal support, and shutdown criteria for low liquid levels or final stripping. Any allowable empty-running exposure depends on configuration, speed, duration, and the liquid handled.
Data for Marine Bilge & Cargo Pump Sizing
- Liquid: bilge composition or cargo identity, salinity, viscosity-temperature data, solids and fibers, gas exposure, and cleaning chemicals.
- Duty: flow and pressure with units for each operating stage, transfer volume and time, level range, startup conditions, and expected interruptions to liquid supply.
- Installation: pump elevation, pipe or hose layout, mounting envelope, available drive and controls, maintenance access, and vessel or shipyard documentation requirements.
Request Marine Bilge & Cargo Pump Sizing
Share your bilge or cargo duty, fluid characteristics, and shipboard layout through our contact form for an application review.
Request Pump Sizing