Mark 978M Series Sanitary Flow Control Valves

Features & Benefits:
- Stem position indication on bonnet allows repeatable stem positioning. Fine threads on bonnet and stem allow precise, manual process control
- Specialized design of diaphragm seal and components allows ultra-high cycle life and lifetime diaphragm warranty
- Jordan diaphragm – highest continuous steam pressure ratings on the market, full CIP/SIP capabilities
- FDA & USP Class VI compliance standard on all process seal and seat materials
- Self-draining – same draining characteristics as the MK978-JD
- No guiding in the wetted area – prevents particulate generation
- Mechanically polished internal components -20Ra (0,5 µm) finish, electropolish – standard; 9Ra optional
- Wetted parts made of 100% ASTM A479 316L Stainless Steel barstock
- Maintenance friendly – easy to perform sanitary maintenance with simple disassembly and reassembly