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4.1.3.2 Step 2: External Clamps
Add the external clamps to the slip-on rubber check valve. For nominal diameters less than or equal
to
10” the check valve will be supplied with either T
-Bolt or Worm Gear Clamps. For nominal
diameters greater than 10
”, the check valve(s) will be supplied with fabricated stainless steel
clamp(s). If the valve are supplied with more than one fabricated stainless steel clamp, then rotate
the additional clamps which will place the clamping section at opposite angles from the first clamp.
This will ensure that even pressure is applied to the valve.
Note: The supplied number of clamps will
vary depending on size and application.
Figure 16: Model RF-DBO Installation Step 2
4.1.3.3 Step 3: Tighten Clamps
Tighten the external clamp until the rubber is
compressed by the external clamp and a tight fit
is achieved then proceed to section 4.1.8 for
anchor bolting/pinning to anchor the slip-on
check valve to the mating piping.
4.1.4
Model DBI-IN: Rubber-Flex Slip-In In-Line Duckbill Check Valve Installation
4.1.4.1 Step 1: Slip-In
Insert the slip-in check valve inside the existing pipe. For horizontal applications the bill of the
check valve must be installed in vertical orientation as shown below in Figure 15.
Figure 18: Model RF-DBI-IN Installation Step 1
4.1.4.2 Step 2: Insert Clamp
Insert and the expandable internal clamp into the rubber check valve.
Figure 19: Model RF-DBI-IN Installation Step 2
Figure 17: Model RF-DBO Installation Step 3