Flow Controls

Shipboard Flow Controls

Legacy in Shipboard Controls

Every US Surface Combatant and Submarine goes to sea with Marotta valves and controls serving in mission-critical applications. Marotta Controls designs, develops, manufactures and qualifies high-performance motion and flow control solutions for surface ships, submarines and deep submergence vessels.

Our components and systems meet stringent naval requirements and MIL standards for shock, vibration and low acoustic signature as well as resistance to seawater corrosion. We have pioneered next-generation technologies that use advanced materials and embedded electronics to reduce weight, life cycle cost, size and corrosion sensitivity.

Program Experience

  • Aegis
  • Air Warfare Destroyer
  • Astute Class Submarine
  • CG-47 Class
  • Columbia Class
  • CVN-78 Class
  • DDG-51 Class
  • F100/F310 Frigates
  • FREMM
  • LCS Class
  • LHA Class
  • Virginia Class

Alignment Fittings

Flo-Fit® is a patented fitting that eliminates pipe alignment problems, reduces stress and provides a leak-free assembly unaffected by shock, vibration or thermal distortion.

  • Non-restricted flow path
  • Line pressures up to 10,000 psig
  • Compact size for simplified installation and handling

Auto-Stop / Excess Flow Valves

Flo-Fuse® can tolerate overloads up to 100% above normal flow settings. A built-in dashpot feature absorbs transient pressure surges of substantially greater magnitude. In the event of excessive flow, the Flo-Fuse closes instantly – stopping flow and/or escaping line fluid. 

  • Re-settable feature
  • Available “In-Line” or “Y” configurations
  • Adjustable shut-off flow

Chilled Water Solenoid Valve

An engineered solution to prevent water intrusion into the solenoid, this technology meets the requirements of MIL-STD-108E for splash-proof and for submersible applications.  Also available with Intelligent Fluid Control Electronics for distributed system control.

  • Sizes available from 3/8″ to 2
  • Operates with pressure differentials as low as 3 psid
  • Polypropylene poppet for long life and bubble tight sealing


In-Line Valves

This unique multi-function high flow technology features a distinctive coaxial flow path that offers a significantly lower pressure drop compared to conventional valves of similar size.Can be used as either a check valve, shut off valve, reducing valve or relief valve.

  • Space saving axial flow configuration
  • Reduces manpower requirements
  • Piloted or motor operated

Valve Manifolds

Manifold offerings range from simple single inlet to multiple outlets, to multi-chambered flow control units. Our manifolds are of single block or “building block” construction, and all valving is plug-in type.

  • Configuration control
  • Space-saving designs
  • Quieting manifold technology

Motor Operated Pilot Valve

Developed specifically for maritime applications, our controls can work with DC brushless, servo and proportional control systems with a variety of power, torque, speed and positioning requirements.

  • Resists seawater corrosion
  • Solid-state electronics
  • 25 year service interval

Quick Closing Valves

The SPV82 Quick Closing Valves series provides a simple overriding release mechanism which provides emergency closing/opening in milliseconds. When an emergency occurs, a lever actuates the armed release mechanism, closing or opening the valve without manually turning the hand wheel.

  • Emergency opening/closing in milliseconds
  • Packless construction (bellows seal)
  • Visual position indication (closed-open)