Outlet valve configuration is the one IBC specification decision that directly affects how fast and how cleanly your material transfers out of the container — get it wrong and every discharge is either slower than it should be or a spillage risk. Here's how the standard options compare.
DN50 Butterfly Valve
The smaller of the two standard butterfly valve sizes, DN50 suits lower-viscosity materials and applications where transfer rate isn't the limiting factor in your process. It's the standard default for general chemical, oil, and syrup transfer where discharge speed doesn't need to be maximised, and the smaller opening reduces spillage risk during connection.
DN80 Butterfly Valve
The larger standard option, DN80 is suited to higher-viscosity materials or applications where faster discharge rate matters — reducing the time a transfer step takes and the labour or line time tied up in it. The trade-off is a larger opening to manage during connection and disconnection, which slightly increases spillage risk if handling procedures aren't followed carefully.
Camlock Outlet
Available on request rather than as a standard fitting, camlock outlets suit applications where quick-connect/disconnect compatibility with existing camlock-fitted hoses and equipment matters more than the butterfly valve's flow characteristics. If your existing transfer infrastructure is built around camlock fittings, standardising your IBC outlets to match avoids needing adapter fittings at every transfer point — a small detail that adds up in transfer time and leak risk across many connections.
Choosing Between Them
| Factor | DN50 Butterfly | DN80 Butterfly | Camlock |
|---|---|---|---|
| Best for | Lower-viscosity, standard transfer rate | Higher-viscosity, faster discharge needed | Matching existing camlock infrastructure |
| Availability | Standard | Standard | On request |
| Spillage risk during connection | Lower | Slightly higher | Depends on fitting condition |
The right choice depends on two things: your material's viscosity and required transfer rate, and what your existing transfer and filling infrastructure is already built around. Specifying a DN80 valve because "bigger is safer" when your process doesn't need the flow rate just adds unnecessary spillage risk during handling — and specifying camlock without checking your infrastructure actually uses it creates a compatibility problem, not a convenience.
Beyond the Outlet Valve
Outlet valve selection sits within the broader IBC Container specification — inner container material (standard or food-grade HDPE), inlet opening, and UN certification for hazardous goods transport all need to be confirmed alongside outlet valve choice for a complete specification.
Ready to talk about your ibc container?
Not sure which outlet valve configuration fits your material and existing transfer infrastructure? Send ENZAC your material data and current transfer setup and we'll help you specify the right configuration.