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AFL OIL STOP VALVES
Automatic spill isolation to prevent oil discharge
MACSEP supplies gravity - operated Oil Stop Valves that automatically seal outlets during an oil spill
About this PRODUCT
AFL/Clark Oil Stop Valves (OSVs) are designed to
prevent separated oil from discharging to sewers or streams. They deliver
dependable operation with a single moving part, require
no power, and are built for
large flow capacity—up to
1400 GPM through a single valve—with an
optional self-opening feature and
corrosion-resistant construction.
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Application/Uses
OSVs are used where oil spills are possible but unpredictable, helping
confine spills on-site and reduce environmental risk. They can be supplied as part of a system or installed into
new or existing catch basins, manholes, or oil/water separators.
Typical applications include
industrial facilities,
substations,
vehicle maintenance areas,
electrical transformers,
oil storage areas,
power plants/utilities,
transport fuelling and wash-down areas,
airports/aircraft services, and
government/military and petroleum facilities.
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Choosing the correct OSV
Start by selecting the installation format that suits your site: OSVs can be supplied prepackaged in a fibreglass or steel catch basin, offered as an option on separators, or provided standalone for retrofit into existing infrastructure.
Next, size the valve to match your discharge pipework—standard sizes are 4", 6", 8", 10", and 12", and larger systems can be achieved by manifolding multiple units; optional screening is available where floating solids may be present.
Where automatic re-opening is required (for example if evaporation or leaky manholes can cause the main float to close due to low water), a recommended slave valve option can equalise pressure once rainwater returns—while still closing during a spill to contain it.
Finally, choose materials to suit conditions: OSVs are fabricated in
non-corrosive PVC or stainless steel—PVC is the most economical option and suits warm climates, while
stainless steel is preferred for more demanding conditions;
extended stainless steel is recommended where
fire risk is possible.
