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1.0 Introduction
1.1 Model RF-DBF: Rubber-Flex Duckbill Check Valve
This type of rubber check valve is designed to bolt directly to existing flanges or
new installations. Flanges are drilled to ANSI 125/150# standard but other drill
patterns are available upon request. This style of rubber check valve can be installed
in either vertical or horizontal applications.
1.2 Model RF-DBI: Rubber-Flex Flanged In-Line Duckbill Check Valve
This type of rubber check valve is designed to fit directly inside of existing piping
systems. The design is supplied with a flat face rubber flange which allows
installation between existing pipe flanges eliminating the requirement for a valve
body. Flanges are drilled to ANSI 125/150# standard but other drill patterns are
available upon request. This style of rubber check valve can be installed in either
vertical or horizontal applications.
1.3 Model RF-DBO: Rubber-Flex Slip-On Duckbill Check Valve
This type of rubber check valve is designed to easily slip over an existing pipe and
is affixed to the pipe with heavy duty stainless steel clamps. This style of rubber
check valve can be installed in either a vertical or horizontal orientation for most
applications.
Note: External Clamp shown is of a general style and will change
depending on the size of the supplied check valve.
1.4 Model RF-DBI-IN: Rubber-Flex Slip-In In-Line Duckbill Check Valve
This type of rubber check valve is designed to slip directly inside of an existing pipe and is supplied with a stainless steel
expandable clamp to secure in place. This style of rubber check valve can be installed in either a vertical or horizontal
orientation for most applications.
Figure 4: Model RF-DBI-IN
Figure 1: Model RF-DBF
Figure 2: Model RF-DBI
Figure 3: Model RF-DBO
Cla-Val Rubber-Flex Duckbill Check Valves are designed to provide outstanding back-flow prevention; eliminating costly and unwanted
back-flow from rivers, oceans, storm water, and is an excellent choice for sewage diffuser systems. Cla-Val Rubber-Flex Duckbill Check
Valves are fully passive flow devices requiring neither maintenance nor any outside sources of power or manual assistance to operate. They
are offered as direct replacements for ineffective and maintenance ridden flap-type check valves as well as for new/existing construction
and custom applications. Each check valve is manufactured to exacting specifications ensuring a perfect fit and usability and is available in
a wide variety of elastomers to meet the design requirements of the application. This installation, operation and maintenance manual will
cover the general practices for the proper installation, operation and maintenance of the Cla-Val Rubber-Flex Duckbill Check Valves.
Model RF-DBF Rubber-Flex
Flanged Duckbill Check Valve
Model RF-DBI Rubber-Flex Flanged
In-Line Duckbill Check Valve
Model RF-DBO Rubber-Flex
Slip-On Duckbill Check Valve
Model RF-DBI-IN Rubber-Flex
Slip-In In-Line Duckbill Check Valve
RF-DBI-IN Mating Pipe