الوصف
APPLICATIONS
Flow reversal solutions for Liquid and Gas applications where protection
from flow reversal in a pipeline is required
CONSTRUCTION
Keckley Style DD wafer body double disc check valves are produced by
the investment casting process. These castings are thoroughly inspected and
machined to exacting specifications. Reference individual technical data
pages for standard materials utilized in the construction of valve components.
FEATURES
•A short face-to-face dimension.
•The spring loaded double disc design creates a low cracking pressure and
allows for the valve discs to close prior to any flow reversal minimizing
water hammer and/or surges in the media.
•Tension on the specially designed spring with extended spring legs
allows the disc center section to lift off the seat prior to the outside edge
opening preventing seat wear in the center “heel” section of the seating
surface.
•Standard elastomeric seats can produce zero leakage when correctly
specified, loaded, and installed. Metal seating surfaces are precision
machined and lapped to a mirror finish to provide a long lasting seal
which meets or exceeds the API 598 leakage standard.
•Retainerless design check valves have no body penetrations eliminating
potential leak paths.
•Allows for interchangeability of the hinge pin and stop pin.
•Epoxy coating is standard.
•Field serviceable without the need for special tools.
