Page 4 of 13
Model RF-DBI-LH Rubber-Flex Low Head Loss
Flanged In-Line Duckbill Check Valve
1.5 Model RF-DBJ: Rubber-Flex Jacket Style Duckbill Check Valve
Model RF-DBI-LH: Rubber-Flex Low Head Loss In-Line Duckbill Check Valve
Figure 5: Model RF-DBJ
1.6
Figure 6: Model RF-DBI-LH Rubber-Flex Low Head Loss In-Line Duckbill Check Valve
Figure 7: Model RF-DBI-LH Rubber-Flex Low Head Loss Flanged In-Line Duckbill Check Valve
Note: For flanged versions of Model RF-DBI-LH Low Head Loss In-Line Rubber Check Valves the integrated rubber flange
can be located on either the inlet or discharge end depending on required installation orientation.
This type of rubber check valve is designed with a full metal enclosure (Model RF-DBJ Shroud) which allows easy
installation in existing piping systems. Flanges are drilled to ANSI 125/150# standard but other drill patterns are available
upon request.
Model RF-DBJ Shroud
This type of rubber check valve is designed to slip directly inside of an existing pipe with the supplied stainless steel expandable
clamp or retaining ring to secure in place; it can be fastened from either the inlet or discharge end of the valve. The standard
Model RF-DBI-LH valve must be installed in a truly round pipe. Out of round pipe may cause distortion of the valve causing
valve failure.
Model RF-DBI-LH Rubber-Flex
Low Head Loss In-Line Duckbill Check Valve