Proco Products, Inc. IOMSeries700R3 Page 10 of 13
4.1.6 Style 790: ProFlex Low Head Loss Inline Rubber Check Valve Installation
4.1.6.1 Slip In Style 790
4.1.6.1.1 Step 1: Insert Valve
The 790 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.
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. For dry or hot installations, it is
recommended to apply a layer of lubricant (such as Dow Corning 111 Compound) to the
internal expandable clamp to assist in proper placement and sealing of the clamp.
4.1.6.1.3 Step 3: Expand Clamp
Tighten the expandable internal clamp until the
stainless-steel portion of the clamp has
embedded itself into the rubber cuff of the
valve. Once the clamp has been sufficiently
held in place tap the clamp with a 4-5 pound
hammer on the inner section of the clamp in a
circular motion to further embed the clamp
into the rubber. Re-tighten the clamp to ensure
a proper seal. Once the clamp is properly
sealed, tighten the lock nut on the internal
expandable clamp and proceed to section 4.1.8
for anchor bolting/pinning to anchor the 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. When
installing the check valve on corrugated pipe the clamp(s) shall be positioned at the
lowest part of corrugation, at the
minimum ID of the pipe.
4.1.6.2 Flanged Style 790
4.1.6.2.1 Step 1: Insert
The 790 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: Style 790 Flanged Check Valve can
be supplied with the integrated rubber flange in the inlet or discharge position depending
on the required installation parameters.
Figure 25: Style 790 Installation Step 3
Figure 23: Style 790 Installation Step 1
Figure 26: Style 790 Flanged Installation
Step 1
Figure 24: Style 790 Installation Step 2
