The HGV series is used, instead the standard bladder or diaphragm pulsation dampeners, with clear advantages:
1.    Complete customization, as per customers requests and projects specification.
2.    The accidental faliure of the bladder / bellow does not compromise the operation since the available liquid volume ensures its proper functionality.
3.    It is a dampener useful to stabilize the flow and suction pressures on pumps, where high load losses, high vapor pressure and low NPSHa are present.

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.

The elastomer material are available in NBR, HNBR, EPDM, FPM, HYTREL, Butile, Polyurethane, PTFE.
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.
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).

Mechanical life: the number of cycles is inversely proportional to the increase of the compression ratio. For pulsation dampener applications, the nitrogen value must be from 60% to 80% of the working pressure also in relation with the type of pump and the working temperature