Tank cleaning machines are selected on four hard numbers: operating pressure (typically 3-15 bar for chemical service, up to 100+ bar for high-impact rotary nozzles), flow throughput (commonly 10-150 m³/h per nozzle head), cycle time, and ATEX/IECEx zone rating for the tank atmosphere [S1].
The reference tank cleaning machine page consolidates the spec families used in road-tanker, IBC and ISO-tank-container service, where spray geometry, media compatibility and CIP/SIP suitability decide the build.
Spray Geometry and Pressure Class Bands
Static spray balls operate at 1-3 bar with 360° coverage and tolerate low-pressure CIP loops, while rotary jet heads need 5-15 bar to drive the gear or turbine and deliver impact forces an order of magnitude higher on the tank wall [S1].
For tank-container service, the tank container reference notes that spray-ball-only cleaning is restricted to non-caking cargoes; chocolate, latex and many polymers require a high-impact rotary head to break residue film in a single wash cycle.
Flow Capacity, Cycle Time and Pump Match
A 50 m³/h pump feeding two rotary heads gives roughly 2.5 m³/h of effective impact per head, and cycle time scales linearly with tank volume divided by nozzle throughput minus the drainage factor (typically 0.7-0.85 of pump flow reaches the wall) [S1].
When the wash is part of a change-cargo sequence on a chemical tanker, the operator runs the head in two passes — a hot detergent pre-rinse, then a freshwater final rinse — and datasheets quote total cycle time as 30-90 minutes for a 24,000 L IMO 2 tank.
Material Selection and Chemical Compatibility
Wetted parts in chemical service are 316L stainless steel as the default, with PTFE or EPDM seals, while hot caustic or concentrated acid duty pushes the spec to Alloy 20, Hastelloy C-276 or PVDF for the body — the chemical-resistance table is the first filter on any OEM datasheet [S1].
The IBC tank page flags that intermediate bulk container cleaning uses compact rotary heads rated to 200-400 L/min at 4-6 bar, sized to fit through the 150 mm top-opening DN80 flange without removal of the cage.
ATEX, IECEx and Drive Type
Tank interiors carry an explosive-gas atmosphere whenever the previous cargo has a flashpoint below 60 °C (closed-cup) or the next cargo is non-conductive, so the head is built to ATEX category 2G / IECEx zone 1 as the default for chemical-tanker and refinery service [S1].
Drives split between gear (constant slow rotation, lowest maintenance), turbine (flow-driven, no separate power), and electric-motor (servo-controlled rotation, used in pharmaceutical and cosmetic tanks where recipe validation demands a fixed RPM and logged wash curves).
Inline Filtration and Residue Handling
A tank-cleaning loop circulates back through a strainer because loosened solids (rust scale, polymer film, product residue) repeatedly clog nozzles, and a 60-100 mesh self-cleaning filter on the return line keeps differential pressure inside the pump curve. [S1]
Specifiers in road-tanker fleets typically oversize the wash pump to 80-110 m³/h and pair it with a 50-80 m³/h filter so that back-flush cycles do not stall the wash program.
Selection Criteria Against Application
Three filters decide the model: tank opening size (DN80, DN150, DN250 manway), previous-cargo list and target change-cargo time. A spray ball handles water-like cargoes below 60 °C with cycle times over 90 minutes; a medium-pressure rotary head covers polymer, oil and most chemical changeovers at 5-10 bar and 20-50 m³/h; a high-impact jet head is reserved for hardened residue, road-tar and pigment service at 30-100 bar and lower flow [S1].
For a plant CIP loop tied to a flow meter on the supply line, the datasheet cross-checks nozzle flow at rated ΔP against the meter's turndown — a Coriolis meter on the wash supply gives the cleanest mass-balance for wash-water consumption reporting.
Limits, Failure Modes and Sourcing Levers
The first hard limit is geometry: a head that does not fit the manway never runs, and a 200 mm-long rotary head needs at least a DN200 manway on the IBC tank or a top-entry ISO tank. The second is seal life — EPDM fails in aromatic and ketone service, FKM in amines, FFKM (Kalrez, Chemraz) covers the worst window but multiplies price 4-6× over EPDM. [S2]
Process engineers sourcing for 2026 fleet renewal can compare the existing fleet's wash cycle time and chemical-resistance table against three OEMs in different price bands; the bottleneck is normally seal inventory, not the head itself, so a vendor with local seal stock wins on downtime even at a 10-15 % unit-price premium. For a wider view on industrial equipment sourcing clusters in the Shandong / Jiangsu / Zhejiang belt — useful for vetting cleaning-machine fabricators — see the Excavator Suppliers 2026 sourcing map and the Wrapping Machine Suppliers cluster map, which document the same vendor-density and lead-time dynamics that apply to tank-cleaning OEMs. A trackable signal for the next quarter: CIP-loop rebuilds in dairy and brewing are specifying 4.0-connected heads (IO-Link or Ethernet-APL) so wash curves can be logged against the recipe, and at least one European OEM has published a beta datasheet for a fully servo-driven, zone-1 rotary head to land before the end of 2026.