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Resonators are used, instead of bladder or diaphragm pulsation
dampeners, with clear advantages:
1.
Very high
reduction of the discharge pulsation; the exact value depends especially on
the pumped fluid features and piping connections. It is typically higher than
60%.
2.
Complete
customization, as per customers requests and projects specification.
3.
There are no
wearing or moving parts in the full equipment.
4.
It’s a
dampener completely without maintenance.
Construction material can be customized depending on the pumped fluid
and end.user specification; as a standard, FOX dampeners are in stainless
steel AISI 316 L but materials like: DSS (Duplex Stainless Steel), SDSS
(Super Duplex Stainless Steel), Alloy-20, Hastelloy-C and Carbon Steel can be
foreseen and painted, as per FOX painting procedure for marine and corrosive
environments or as per end-user specification. Volumes can be customized up to 5.000 liters; FOX is always suggesting
to share all the necessary operating conditions, in order to be in a position
to select the most appropriate volume for your pump.
The operating principle of the resonator is the resonance. The
frequencies compensation generated by the pulsations are reduced by the internal
design of the resonator and a key factor is the pumped fluid compressibility
value (bulk modulus) that has to be considered while sizing the resonator.
Process connections (in & out
flanges) are customized as per the requirement of the customer, as well as
their position. As a standard a 180° is considered but we can foresee a 90°
angle on the outer flange. The same level of customization is foreseen for the vent & drain
connections, as a standard without counter-flanges. We can consider blind
flanges with all the relevant bolts, nuts and spiral wound gaskets or
metallic ring joint, depending on the flange type considered (RF or RTJ).
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