A useful vacuum disc filter spare-parts list connects each replacement item to the exact machine, component revision, and maintenance task. It also distinguishes routinely consumed parts from rarely used components whose absence could extend a production stoppage.
The objective is to have the correct serviceable item available when required. Buying parts by a broad machine description or storing large quantities without checking compatibility can leave a plant with inventory it cannot use.
Start with the manufacturer's equipment-specific parts list, then assess consumption, failure consequences, replenishment time, and available redundancy. Depending on the design, candidates may include cloths and fastening items, seals, filter sectors, valve wear components, bearings, drive parts, spray components, and selected instruments.
There is no standard quantity that suits every filter station. A continuously operated single-filter plant and a station with spare capacity face different consequences when the same component is unavailable.
Metso's filtration spare and wear parts overview treats identification, ordering, supply, and demand planning as connected tasks. The framework below applies that distinction to a plant's own equipment records and maintenance needs.
Create one record for each filter using its manufacturer, model, serial number, plant tag, commissioning information, and current configuration. Attach the latest approved parts list and relevant assembly drawings.
Also record modifications. Two machines originally supplied under the same model designation may no longer use identical parts if one has received a revised valve assembly, drive, sector design, or instrumentation package.
When requesting a replacement, include the part number and drawing revision whenever available. Photos help show location and condition, but they should support identification rather than replace dimensional and specification checks.
Manufacturer catalogues may associate illustrated parts with specific equipment identities, as described in Metso's online spare parts catalogue. If no catalogue is available, request a confirmed parts drawing from the equipment supplier.
An assembly-based list makes it easier to find related items and prepare a complete job kit.
| Assembly | Examples to verify against the installed design |
|---|---|
| Disc and sector system | Sectors, cloths, clamps, fastening items, and connection seals |
| Distribution valve | Wear components, seals, springs, and related fasteners where fitted |
| Shaft and supports | Specified bearing components, housings, seals, and lubrication items |
| Drive | Coupling parts, transmission components, motor, and gearbox details |
| Cloth-cleaning system | Nozzles, spray components, strainers, and valves |
| Auxiliary equipment | Pump seals, vacuum-system service items, blowback valves, and instruments |
These examples are not a bill of materials for every filter. Use the installed machine documentation to determine which items apply.
A frequently replaced item deserves a consumption-based stocking plan. A rarely replaced item may still deserve stock if a failure stops the station and replacement takes a long time.
For each part, ask:
Does failure stop production, reduce output, or have a limited effect?
Is another machine or approved spare assembly available?
Can deterioration be detected before replacement is needed?
How long does identification, manufacture, transport, and receipt take?
Does the part have storage restrictions or a limited shelf life?
Record the reasoning alongside the quantity. This is more useful than assigning every component the same “critical” label.
An installed standby unit can change the answer, but check what capacity remains while it is used. Redundancy may also share common equipment whose failure affects both units.
For routinely consumed items, a simple starting point is:
Reorder point = Expected consumption during replenishment time + Safety stock
For an illustrative example, assume a site uses four identical replacement items per month. The full replenishment time is two months, and the site chooses three items of safety stock. The reorder point is 4 × 2 + 3, or 11 items.
The safety stock in this example is an assumption, not a recommendation. Set it from variability in use and supply, the effect of a shortage, and storage constraints.
Track inventory position as usable stock plus confirmed incoming stock minus allocations. Damaged items and parts already reserved for a shutdown should not be counted as freely available. Rare major components require a consequence-based decision rather than a monthly consumption formula alone.
Similar appearance and overall dimensions do not establish interchangeability. A sector can differ in connection geometry, fastening arrangement, material, or internal construction. A seal can fit dimensionally while using an unsuitable material.
Ask the responsible supplier or engineer to confirm substitutions against the complete specification. If a newer part supersedes an older one, document whether it replaces the old item directly or requires associated components.
Update the machine record after an approved change. Otherwise, the next purchase may restore the obsolete part number to stock.
For cloth performance selection, use the separate filter cloth guide. The spare-parts record should capture the approved cloth specification and attachment arrangement once selected.
Follow supplier preservation instructions for seals, cloths, bearings, motors, and other assemblies. Identify packaging requirements, inspection intervals, and any shelf-life limitations.
Label each item with its identity, revision, compatible equipment, quantity, and storage location. Maintain a clear distinction between new, repaired, awaiting inspection, and rejected items.
For repairable assemblies, record the repair history and release status. A component returned from the workshop should not become an available spare until the required checks and documentation are complete.
Keep preservation requirements with the stock record so they remain visible when responsibility changes between warehouse and maintenance personnel.
Review the service procedure before a planned shutdown. The main replacement component may also require seals, specified fasteners, consumables, tools, and alignment or adjustment information.
Check the kit against the current equipment configuration and reserve it for the job. Confirm that the planned access and lifting arrangements suit the component; the filter station layout guide explains this review.
After the work, record which items were actually used and why. Unexplained consumption should trigger a check of failure history rather than an automatic increase in stock quantity.
A higher operating schedule, new feed characteristics, equipment modifications, or changed supplier lead times can alter spare requirements. Review the plan after such changes and after significant failures.
Separate normal wear replacement from damage caused by another fault. Repeatedly replacing a component without investigating the cause can conceal an installation, process, or maintenance problem.
Use actual consumption and confirmed supply information to revise the list. Historical figures from a different operating duty may no longer represent the current station.
Provide the machine nameplate, plant tag, assembly location, existing part number, drawing revision, quantity, and required date. Add clear photos and dimensions when identity is uncertain, and explain any previous modifications.
Contact Tongzhiren Filtration with the equipment and component information to discuss identification and replacement requirements. Ask for confirmation of compatibility and current supply scope before treating a quoted item as an approved substitute.
No. Diameter alone does not define the connection, fastening, materials, or revision. Supply the machine identity and component information.
The decision depends on consequences, redundancy, replenishment time, and storage requirements. Some items may be supported through an agreed alternative supply arrangement.
Use the supplier's recommendation as a starting point, then check the actual operating schedule, planned service tasks, local availability, and consequences of delay.
Review them when consumption, operating conditions, equipment configuration, or lead times change, and at the site's established maintenance-planning intervals.