Installation in the system

• Install the ejector(s) preferably above the compressors, ensuring that they are accessible from the outside.
• Installation: horizontal (a) or vertical (outlet downwards, b).

• A mechanical high-pressure control valve for emergency operation can be installed parallel to the ejector (system design B).
• Install a filter in the motive pressure line upstream of the ejector inlet and the parallel-connected high-pressure control valve.
• Only use pipes with bent pipe sections. This reduces turbulence and avoids pressure drops. Do not use 90° pipe bends (e.g. T-pieces)!
• Install shut-off valves for maintenance purposes in the lines to and from the ejector.
• Install an additional check valve in the suction line of the ejector in order to prevent possible re-expansion of the suction mass flow from the intermediate pressure vessel. This may happen if the suction effect created by the motive mass flow is too low to suck in the suction mass flow.
• As an alternative to the check valve, a motor-controlled valve can be installed in the suction line to prevent possible re-expansion. The control is based on a minimum pressure difference between the suction connection of the ejector and the suction gas pressure (in the flow direction upstream of the motor-controlled valve). As soon as the pressure drops below a minimum pressure difference, the valve closes.
• A settling section aligned with the diffuser must be installed on the outlet side. This section must be at least 1.5 x as long as the ejector (l_settling = 1.5 x l_ejector).
• The main outlet line at the diffuser must not rise towards the intermediate pressure vessel! This is the only way to ensure unhindered entry into the vessel without having to overcome any hydrostatic pressure.
• The flow cross section of the main outlet line corresponds, to put it simply, to the sum of the cross sections of the motive pressure line and suction line.

Additional installation instructions for systems with ejectors connected in parallel

• Make outlets from the main lines to the connections of the ejectors on the motive pressure side and suction side without T-pieces; this reduces turbulence and avoids pressure drops.
• The connections from the main lines to the individual lines should preferably be made at an angle of 45°.
• Join the individual outlet lines in the collector without T-pieces and preferably at an inlet angle of 45°.
• Dimension the flow cross section of the outlet line such that a flow velocity of 0.3..1.0 m/s is not exceeded at full load at the defined design point.