Amazon.com: YOZUMD Tank Butterfly Valve 62/75mm Plastic IBC Tote Tank Butterfly Connection Tap Water Drain Adapter IBC Ton Barrel Switch DN50* : Industrial & Scientific
Butterfly valve, throttle DN50 with pneumatic actuator AT63 HPControl
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DN50 IBC Tote Butterfly Valve 75mm Tap Drain Connector For Oil Water Container | eBay