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4.1.6
Model RF-DBI-LH: Rubber-Flex Low Head Loss In-Line Duckbill Check Valve Installation
4.1.6.1 Slip In Model RF-DBI-LH
4.1.6.1.1 Step 1: Insert Valve
4.1.6.1.2 Step 2: Insert Clamp
Insert the expandable internal clamp(s)
into the rubber check valve in either the
inlet or discharge end depending on
installation orientation and ensuring that
the adjustable bolts are located at the top
of the valve. When installing multiple
internal expandable clamps ensure the
clamps are evenly spaced/ rotated to
provide even clamping pressure as well
as the internal expandable fasteners
located in a position that minimizes flow
interference.
4.1.6.1.3 Step 3: Expand Clamp
Tighten the expandable internal clamp
until the stainless-steel portion of the
clamp has imbedded itself into the rubber
of the valve. Tighten the lock nut once
the internal expandable clamp is in the
proper position and proceed to section
4.1.8 for anchor bolting/pinning to anchor
the slip-in check valve to the mating pipe.
Note: This style of check valve
installation relies on external pressure of
the internal expandable clamp to ensure
that the valve does not move, care should
be taken to ensure proper sealing.
4.1.6.2 Flanged Model RF-DBI-LH
4.1.6.2.1 Step 1: Insert
Figure 23: Model RF-DBI-LH Installation Step 1
Figure 25: Model RF-DBI-LH Installation Step 3
Figure 26: Model RF-DBI-LH Flanged Installation
Step 1
Figure 24: Model RF-DBI-LH Installation Step 2
The RF-DBI-LH valve must be installed
in a horizontal pipe and will be supplied
with
a “FLOW” direction label and a
“TOP”
label to ensure proper installation
orientation within the pipe. Insert the
slip-in check valve inside the existing pipe
and push until inlet/discharge end is flush
with end of pipe.
The RF-DBI-LH valve must be installed
in a horizontal pipe and will be supplied
with a “FLOW” direction label and a
“TOP” label to
ensure proper
installation orientation within the pipe.
Insert the slip-in flanged check valve
inside the existing pipe and push until
flanged inlet/discharge end is flush with
end of pipe.
Note: Model RF-DBI-LH Flanged
Check Valve can be supplied with the
integrated rubber flange in the inlet or
discharge position depending on the
required installation parameters.