DJ-FDT butterfly valve is mainly designed for powder, granule, capsule and other container equipment systems. The butterfly valve has the characteristics that standard butterfly valve does not have, such as ultra-small torque, seal open/close does not produce excessive friction, long life, No seal powder shedding, ultra-short valve body and adjustable pressure. The valve does not require professional tools to be disassembled, maintained, cleaned, safe, reliable, low cost, simple to operate and can be interchanged manually, pneumatically or electrically.