HPE energy dissipators are designed to destroy the pressure energy in fluids so that the energy can be reduced by a finite desired amount.
The basic dissipator element in these HPE energy dissipators consists of a hole in a plate. By having a number of holes in a number of spaced apart plates in the flow path, the flow can be broken down in steps.
The small dissipator holes in the plates distribute the flows evenly across the cross-section of the pipe in which the plates are mounted. The number and size of the holes in the plates, which are located by spacers from each other, are varied so that the smallest holes are on the high-pressure side and the largest holes on the low-pressure side.
This design allows the pressure drop across each plate to be related to the downstream pressure for that particular plate so that the flow velocity can be maintained to a level, which will prevent cavitation at the point where the holes exit into the chambers between the plates.
Preventing cavitation enables the noise produced by the fluids to be reduced in addition to virtually eliminating the damage that normally occurs with cavitation.
HPE energy dissipators are designed with at least one hole plugged in the first plate or even two plates. Should a minor increase in flow rate be required, the plugged hole can be opened to increase the flow through the system.
Conversely, another hole or two can be threaded and plugged to reduce the flow through the system.
The pipe in which the dissipator elements are mounted is provided with hubs or flanges to client specification.
Key features of HPE energy dissipators:
- Noise levels and wear rates are minimised due to the graduation of the hole sizes in the dissipator elements
- Dissipator chambers are designed to protect the containing pipe against flow velocity or cavitation by the spacers between the dissipator elements
- Each dissipator element is individually sealed against the outer pipe so that no flow can occur outside of the dissipator elements, preventing wear
- Manufactured in sizes from 20NB to 350NB at pressure ratings of 3 MPa to 30 MPa
- Axial lengths are generally as per HPE valve standards for similar pressure ratings
- Designed to ANSI B16.34 standards
Hydro Power Equipment is based in South Africa and represented in Australia by Upwey Valve & Engineering .
- Noise level at a distance of 1m from the dissipator is maximum 90 decibels