Instruction Manual

7BLACOH Industries
Details regarding warranty and return policy are available on Blacoh’s website at www.Blacoh.com
Manufacturer’s Limited Warranty & Return Policy
Installation for Surge / Water Hammer
CAUTION! DO NOT use plastic models as Surge Suppressors at quick closing valves. Use metal Surge Suppressors for water
hammer or quick closing valve applications. Consult factory for options.
Step 1 Installation Position
Install the dampener inline as close as possible to and before the device
causing the water hammer pressure spike (see FIGURE 2). For example, if
a quick closing valve is causing water hammer, install the dampener on a tee
or elbow as close as possible upstream of the valve. Dampener installation
should be no more than ten pipe diameters from the valve. It is advisable to
install an isolation valve between the dampener inlet and the mounting
tee so maintenance and pressure checks can be done while the system is
operating.
Step 2 Charging and Startup (see Pre-Charge Notes)
Chargeable models do not require an air line connection. Dampener can be pre-
charged with compressed air up to a maximum pressure of 150 psi (10.3 bar).
If maximum pressure will exceed 150 psi (10.3 bar), dampener must be pre-
charged with Nitrogen only. Use a hand pump, Nitrogen tank or air compressor
to charge dampener. DO NOT USE OXYGEN. Charging kits are available from
BLACOH.
The dampener must be pre-charged after installation but prior to system
operation. The only method to get an accurate pressure charge in the dampener
is to charge it prior to system startup or with a closed isolation valve at the
dampener inlet. Pre-charge the dampener with 90% to 95% of expected system
pressure. DO NOT USE OXYGEN. A ll valve similar to a Schrader type tire
valve but designed for suppressors is mounted to the top of the dampener.
Replace ll valve cap after charging dampener and recheck dampener charge
every month.
Figure 2