Dual Plate Dual Plate Check Valve - UNIFLOW Fig. DP | Comeval Comeval Dual Plate Check Valve - UNIFLOW Fig. DP | Comeval The Dual Plate Check Valve - UNIFLOW Fig. DP by Comeval is designed to prevent reverse flow in piping systems using two half spring-loaded sphere discs with a soft seal. Commonly referred to as Steel Non-Return Valves or Backflow Preventer Module H, these valves are suitable for applications such as HVAC and lubrication systems. They come with various... View