FAQ
We have received a number of common questions, and we believe it is important to address them with you immediately.
FAQ
Viscosity values are crucial for determining whether an oil is suitable for specific operating conditions: high-viscosity oils are suitable for use in summer, low-viscosity oils for winter, and multi-grade oils possess self-regulating capabilities. The operating range of multi-grade oils is defined by two figures: cold viscosity and hot viscosity. It is recommended to use multi-grade SAE 15W-40 oil in the pump.
The pump is supplied pre-filled with its initial oil charge and fitted with a special transport cap to prevent oil leakage during transit. Before starting the pump, this transport cap must be replaced with the cap equipped with a dipstick. The plunger pump must be connected to a water tank or water supply network via a pipe. A ball valve may prove useful during maintenance. It is recommended to install a filter of appropriate size to prevent impurities from entering the pump, which could lead to clogged automatic valves, blocked nozzles, scored pistons, or—in any case—premature wear of the system. To avoid negative pressure at the pump inlet, the installation of an auxiliary pump may be required. The pump can be supplied directly from the water mains under pressure, up to a maximum of 10 bar. If the pump draws water from a tank, the water level should ideally be positioned above the pump (placing the pump under positive head) or at the same level. To monitor the supply pressure, it is recommended to install a pressure gauge on the supply line.
- Do not operate the pump dry. Open the suction valve to ensure a supply of fluid to the pump.
- Always maintain positive pressure at the pump inlet, and monitor both the pump’s operating temperature and the temperature of the incoming fluid. If the specific guidelines outlined in the technical specifications are followed, HT models are rated to handle temperatures exceeding 65°C.
- Avoid operating in a closed-loop configuration, particularly when pumping fluids at high temperatures, high pressures, or high flow rates.
- It is recommended to install a pressure gauge on the supply line to monitor the inlet pressure.