Butterfly, ball or cylinder valve

How each one works

Butterfly valve. A flat disc sits across the bore on a spindle. Turn the lever a quarter turn and the disc swings edge-on to the flow. It is compact, cheap and easy to operate with one hand, which is why it is the default on so many totes. Open, the disc stays in the flow path, so the bore is never quite clear.

Ball valve. A ball with a hole through it turns in two seats. Open, the hole lines up with the pipe and the bore is clear end to end. Shut, the ball presses on both seats. It is bulkier and costs more, and it gives a clean, full flow and a firm seal.

Cylinder or plug designs. Some makers fit a valve with a cylindrical or tapered plug that turns or slides in the body. They are less common in the US trade. If your line is set up for one, send us the design name or a photo and we'll quote totes with the same valve.

Which suits which product

Product	Usually	Why
Water, thin chemicals, solvents	Butterfly	Flows freely past the disc; low cost
Syrups, resins, viscous oils	Ball, often 3 in	Full bore, nothing to slow the flow
Products with solids or fibres	Ball	Nothing in the bore for solids to catch on
Costly products drawn a little at a time	Ball	Firm shut-off between draws
Sanitary products cleaned in place	Ask us	Depends on the design and your cleaning method

Cleaning and drips

A butterfly valve's disc and its seal ring sit in the flow, so product collects at the seal; on a sticky product, a drip at the outlet after closing is common. A ball valve traps a little product in the ball's bore when shut, which matters if the product sets or spoils. Either way, flush the valve after the last draw if the tote will stand, and keep the dust cap on between uses.

Gaskets and seats

The valve's seal is the gasket that matters most. On butterfly valves it is the ring the disc closes against; on ball valves it is the two seats. Match the material to the product: EPDM for water-based products, Viton for oils and solvents. See valves and fittings for the comparison, and put the material on the quote request.

Flow control and metering

Neither valve is a precise meter, but they behave differently part-open. A butterfly valve's disc sits in the flow, so a few degrees of travel change the rate a lot near closed and little near fully open. That suits filling a pail or a drum, where an operator opens the valve until the flow looks right. A ball valve opens a hole through the ball, and partly open it throttles the flow over a narrower range before it is fully open.

If you are dosing from the tote into a process, don't rely on either valve to set the rate. Open the tote valve fully and control the flow with a pump, a flow meter or a metering valve further down the line. That keeps wear off the tote valve, which is the one fitting you can't easily replace while the tote is full.

For gravity draining into small containers, ask for a valve handle that can be locked or tied closed. A valve knocked open by a forklift or a passer-by is the most common way a full tote empties itself onto a floor.

Handles, locks and seals

Valve handles break more often than valves. A lever snapped off by a passing pallet leaves a tote that can't be opened, or worse, can't be shut. Ask whether a spare handle comes with the order, and keep one by the dispensing point. Where tampering or theft is a concern, a locking handle or a padlockable hasp keeps the valve closed. For shipments, a numbered plastic seal through the handle shows whether anyone opened it on the way.

Short answers

Which valve is standard on an IBC tote?

A 2 in butterfly valve is the most common on caged totes.

Is a ball valve better than a butterfly valve?

For viscous products, products with solids, or where a tight shut-off matters, usually yes. For water and thin liquids a butterfly valve does the job at lower cost.

Can I change the valve on a tote?

On most designs the valve can be replaced. It is simpler and cheaper to order the tote with the valve you need.

Which valve is better for thick liquids?

A larger valve matters more than its type. For syrups, purées and heavy coatings, ask for a 3 in valve; a full-port ball valve also leaves no disc in the flow.

Why is my valve stiff to turn?

New seats grip tightly, and some products dry or crystallise around the disc or ball. Work it gently; never use a cheater bar, which can crack the valve body or the bottle flange.