Enerpac’s ZA4-series of high-pressure hydraulic air-driven pumps is designed for in-plant, industrial applications and medium to large construction projects. It claims that its Z-Class pump design offers higher oil flow and bypass pressure – and the potential to improve productivity in any application. Because of their Atex 95 certification, the pumps are safe for use in environments such as refinery, petrochemical and oil & gas processing.
Reservoirs have capacities of 4-40 litres. A sight gauge on the 4- and 8-litre models and a level gauge on the larger reservoirs allow quick and easy oil level monitoring. The manual control valves come with a built-in user adjustable pressure relief valve. Standard models fit most applications, while many custom configurations are available.
The optional heat exchanger warms exhaust air to prevent freezing and cools the hydraulic oil.

Accurate flow
Smartflow is a sensorless flow measurement function that can calculate the flow of a centrifugal pump within 5% of the pump-rated flow – without the need for any external instrumentation. It is fitted as standard on the version 5.0 of Pumpsmart PS200 from ITT.
This function mathematically models the pump power curve with only four points of CDS pump performance curve data: BEP flow, BEP power, shut-off power and rated speed.
There are other new features. Advanced Pump Protection takes into account the hydraulic and mechanical loses associated when changing the speed of a centrifugal pump. A self calibration feature allows for an accurate representation of the pump to ensure it is protected at all speeds.
Positive Displacement Pump Protection (PDPP) is a sensorless function that protects a constant torque load such as a positive displacement pump. Because PDPP is used with constant torque loads it does not take into account changes in speed – as APP does. PDPP monitors for conditions such as high and low torque which can indicate that the pump has a blocked discharge or a starved suction.

Source and more info: eurekamagazine