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The Hydrocore™ energy dissipator was designed and developed in collaboration with members of various universities in South Africa in the late 1990’s. These studies, which determined the tolerable perimeters of the valve, were done in accordance with several standards that are mentioned below.

Scope of Applications 

The Hydrocore™ energy dissipator is a tailor-made device, used in open end applications and designed to reduce the upstream pressure ‘Pu’ (max up to 250 bar) to a set pressure ‘Pd’ (max up to 100 bar) at a designed flow rate


Design Standards

The design of the Hydrocore™ energy dissipator complies with various international standards. The most prominent ones are:

  • ASME Boilers & Pressure Vessels Design Code 

  • ANSI B16.5 

  • ANSI B16.10 

  • ANSI B16.34 

  • ANSI B16.37

Energy Dissipator.png

Pressure rating

250 bar (max) working pressure

Temperature rating

Up to 85ºC with standard seals.


Liquid and gas with low content of suspended solids.

Pipe sizes

2” (50 NB) to 16” (400 NB)


SABS 1123, BS4504, BS10, ASME B16.34, ANSI B16.5

pH levels & chlorides

Parts of the valve are made from stainless steel and can withstand a low level of chlorides.

Installation position

The valve can be installed in any position


  12 NB    Flow: 1-2 ℓ/sec

  25 NB    Flow: 3-6 ℓ/sec

  38 NB    Flow: 7-14 ℓ/sec

  50 NB    Flow: 12-24 ℓ/sec

  80 NB    Flow: 30-60 ℓ/sec

100 NB    Flow: 47-94 ℓ/sec

150 NB    Flow: 106-212 ℓ/sec

200 NB    Flow: 188-376 ℓ/sec

250 NB    Flow: 294-588 ℓ/sec

300 NB    Flow: 424-848 ℓ/sec

350 NB    Flow: 577-1154 ℓ/sec

400 NB    Flow: 754-1508 ℓ/sec


The length of the energy dissipator is determined by the required pressure drop ‘Pu - Pd’, which determines the number of pressure reduction stages.

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