Filter Units

The Sentinel range of filter units has been specially developed for the filtration of electroplating solutions and the range of capacities available will meet the majority of automatic and manual plating installation requirements.

Sentinel filter units are totally enclosed, provide a large filtration area, are easy to clean and maintain, and provide effective retention of activated carbon or filter aids.

The filters are designed to take plate packs and the standard units incorporate a rubber lined centrifugal pump.

Sentinel filters may be used on the majority of electroplating solutions including:

• NICKEL - bright, semi-bright, dull
• ZINC - cyanide, alkaline, acid, neutral
• TIN - acid, stannate
• COPPER - cyanide, pyrophosphate
• CADMIUM - cyanide, acid, neutral.

For the following solutions sentinel filters fitted with special pumps can be supplied:

• flourborate and fluoride based solutions
• acid copper
• acid tin (including bright solution.)
• solutions containing free hydrochloric acid e.g. nickel chloride strike solutions.

Sentinel filters are not suitable for the filtration of chromium plating solutions.

Filtration of anodising solutions: For sulphuric acid anodising solutions standard Sentinel filter units are advised.Sentinel fiter units are supplied in three sizes having one, two and three filter containers respectively. The filter contains are made of steel with a special quality high temperature cured rubber lining and are mounted on a sturdy tubular steel cradle. On standard units the motor-driven pump is mounted within the cradle, below the filter container. The single and double container units are fitted with castors for ease of movement, the three-container unit is provided with mountings for foundation bolts.

Mechanical seal. Alternatively magnetically coupled, seals monoblock pumps can also be supplied. The filter units are supplied complete with a suitable motor, mounted on the tubular frame. A valve is fitted to the pump inlet to permit the unit be isolated.

Pipework: Sentinel filters are provided with flanged inlets and outlets, permitting when required, direct connection to rigid plastic or rubber lined steel pipework. The units are supplies complete with two 3 metre (10ft.) lengths of reinforced acid resistant polypropylene hose including appropriate spigots.

Sentinel filter units can be supplied as part of comprehensice solution handling facilities incorporating features such as:

• Transfer of solution from plating tank to storage.
• Solution circulation for heat exchangers and low current density plating out-units.
• Chemical make-up tanks.
• Plating solution purification treatments.