Instruction Manual

6BLACOH Industries
Installation for Pump Inlet
Step 1 Installation Position
Install the dampener inline as close to the pump inlet as possible and after any upstream equipment such as risers, valves, elbows, meters
or lters. Dampener installation should be no more than ten pipe diameters from pump inlet. If using a exible connector on the inlet side of
the pump between the system piping and pump, the dampener should be installed on a tee at the pump inlet manifold. The exible connector
should be attached to the dampener’s tee and system piping (see FIGURE 1). A compound pressure gauge should be installed upstream of the
dampener to aid in proper dampener adjustment.
Step 2 Charging and Startup (see Pre-Charge Notes)
Chargeable models do not require an air line connection. Dampener must be pre-charged with compressed air or Nitrogen using a hand pump,
Nitrogen tank/bottle or compressor. DO NOT USE OXYGEN. Charging kits are available from BLACOH.
A. Suction Lift/Dampener: When using the dampener in a suction lift application no pre-charge is required. Start the pump to generate
working pressure. As system pressure and vacuum is created, the acceleration head created with each suction stroke will compress the air
trapped in the bladder/bellows.
B. Positive Inlet Pressure: Pre-charge the dampener with 50% of the static system pressure realized at the pump inlet. Start the pump
to generate working pressure. Minor pressure adjustments may be required. Allow the system to respond to each adjustment (this may take a
minute or two) before making further adjustments.
Figure 1
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.
Prior to starting the pump, pre-charge the dampener to approximately 80% of expected system pressure and replace ll valve cap. DO NOT
USE OXYGEN. The pre-charge pressure in the dampener must always be lower than pump discharge pressure. Generally, pulsation is most
e󰀨ectively minimized when the gas pre-charge is 80% of system pressure. Start the pump to generate system pressure. The dampener charge
pressure may need to be adjusted up or down to be most e󰀨ective in reducing pulsation. NOTE: The most e󰀨ective method to set the proper
dampener charge is to install a pressure gauge downstream of the dampener and adjust the dampener to minimize needle movement on the
gauge.
Once system pressure is in contact with the bladder/bellows, the gas charge will be compressed to the system pressure and the
dampener gauge will read the system pressure, not the initial charge pressure. Once working pressure is achieved adjustment may be
necessary. Gradually increase or decrease the gas charge in the dampener by bleeding or lling through the gas valve. Allow the system to
respond to each adjustment (this may take a minute or two) before making further adjustments.