Figure 809-815

Swing CheckKeystone

´╗┐Compact wafer style design and round unobstructed port tackle many tough applications.

These wafer check valves are used to stop flow reversal in chemical refineries, ammonia compressors, waste water treatment plants, HVAC systems and most other industrial applications.

  • Minimizes piping support with the compact wafer style body. This range of wafer check valves are two to three times lighter than traditional full-bodied check valves.
  • To meet special applications and service conditions, These valves can be offered with many different options, such as: silicone-free cleaning, oxygen-cleaning, vertical service, left-hand operation, levers, weights and cushions.
  • For media containing fibrous matter or caustics, These offers an external spring (Figure 813 and Figure 815) which eliminates the spring from the flow path. This will prohibit the possibility of fiber wrapping around the spring or chemical attack of the spring.
  • Maintenance is minimal with the field replaceable O-ring seat, available in all styles and sizes.

Technical Data




Up to 740 psi




NPS 2-36



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