The MD Series provides those involved in bulk material handling process engineering, production supervision, and equipment maintenance, a material metering valve that immediately contributes tangible operating efficiency advantages, and long-term production and maintenance savings. The equipment suits cement pump applications where powder is transferred from mills to silos, or from silo to silo. It can also be used in batching applications from bulkers and/or bags to silos, plus pneumatic feeding of filler units. The MD Series can also be used as a valve/ meter in applications for metering cement discharge from storage hoppers or filer units. Another application is pressure modulation and dust release in dust collection systems.