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Mark 978 Series The Mark 978 Sanitary Control Valve is designed to meet the required specifications for sterile process control valves. The Mark 978 Series is suitable for a wide variety of applications in the pharmaceutical, biotechnology, cosmetic, dairy and food & beverage industries.

As valve with FDA and USP conforming materials, the MK978 is ideally suited for a range of flowing media in both the utility and process areas of a clean system.

High rangeability, characterized trim, high capacities, superior temperature and pressure ratings along with a selection of sealing methods make the MK978 the sanitary control valve for liquid, gas and steam services.

Features & Benefits




Specialized diaphragm seal design for ultra-high cycle life
Maintenance-friendly – easy to perform sanitary maintenance with simple disassembly, reassembly and steam-in-place/clean-in-place capabilities
Wetted parts made of 100% 316L stainless steel barstock
No guiding surfaces in the fluid – prevents particulate generation
Epoxy coated multi-spring actuators to meet a wide range of differential requirements while providing maximum corrosion resistance during washdown.
Self-draining – when mounted in traditional vertical orientation
No threads in contact with service media – prevents accumulation of contaminants