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CGDM Series The Mark 978 Series sanitary control valve is designed to meet the rigid specifications for all sterile process control applications. ASME BPE compliance make it suitable for a wide variety of applications in the pharmaceutical, biotechnology, cosmetic, dairy and food & beverage industries.

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.

Pure steam. WFI. Process gases. Product media. The Mark 978 has the user in mind so purity, precision and control are assured.

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 pressure requirements while providing excellent corrosion resistance during washdown
Self draining – when mounted in vertical (all sizes) or horizontal orientations (except 3")