GENERAL DESCRIPTION
PHPK pumps are high pressure variable displacement vane pumps equipped with hydraulic horse power limiter device that allow you to instantly adjust the flow rate accordingly to circuit requirements. Variable displacement vane pumps are volumetric type so they deliver a maximum flow rate equivalent to its displacement for their speed of rotation. Operating pressure is due to pressure loads encountered by the fluid within the system. When the outlet pressure (on the system) equals the pump setting pressure, the flow rate is adjusted to the values required by the system. When this value is achieved, pump reduces its flow rate to zero, keeping the pressure almost constant. In zero flow conditions, pump delivers oil only to compensate any possible drain and piloting.
In addition, the horsepower limiter device allows to optimize power consumption. The operating principle is based on maintaining the flow pressure product (q x p) practically constant, so that when the pressure increases, the flow decreases and vice versa, according to a characteristic hyperbolic type curve.
Berarma PHPK pumps are especially suited for those systems with a work cycle consisting of two operating phases:
- a first phase characterized by a quick approach at low pressure
- Â a second phase characterized by low speed and high pressure (e.g. forming, drawing, blanking presses, etc.)
In this way, it is possible to set up a system using only one pump, where previously two pumps were required, resulting in obvious cost savings.
The PHPK series pumps combines the characteristics of other Berarma variable displacement vane pumps with
- Silent running
- Â High efficiency
- Â Long working life
- Â Economy and simplification of hydraulic system
- Â Modular design
- Â Energy saving
What makes the Berarma PHPK series pumps very interesting for the market?
- Â Dual inlet and outlet channels in the internal pump cartridge
- Â Dual axial hydrostatic balancing on the distribution plates
- Â Wear reduction of the internal pump cartridge parts
- Â Innovative shapes and design
- Â 180bar working pressure