VORTEX SELF-HEATING PRESSURE REGULATOR:

Universal Vortex offers a non-freeze pressure regulator to prevent the likelihood of unheated gas freezing in pressure reduction.

The Vortex Self-Heating Pressure Regulator (VPRS) in the course of its performance reduces the pressure of the inlet gas flow to the desirable downstream pressure and simultaneously converts the energy of a decompressed gas into a thermal flux (Vortex Phenomenon), forming vortex ‘cold’ and vortex ‘hot’ fractions. These fractions co-exist in the low-pressure part of the VPRS, merge at the unit’s exit orifice, then are discharged into the downstream line. Prior to mixing up with the cold fraction, a portion of the hot fraction indirectly heats the unit’s pressure reducing orifice (spot heating), thus preventing freezing of the depressurized gas flow.

Main features of the VPRS:
• Self-Heating device that needs no external heating
• Generates heat as an outcome of the routine gas pressure reduction
• Steady non-freeze performance regardless of the gas quality
• No moving parts
• No lost gas
• No maintenance
• Easy to install or retrofit in new or existing facilities

GAS TRANSMISSION AND GAS DISTRIBUTION APPLICATIONS

The principal field of VPRS applications is Farm Taps and small Pressure Regulation Stations. The VPRS installation generally includes a monitoring valve (typically the Fisher 627M) upstream of the unit to control the VPRS downstream pressure.

To comply with variable flows the VPRS based PRS usually consists of multiple runs, each equipped with the VPRS and the monitoring valve. Commonly, each monitoring valve has an individual set up pressure (within MOAP).

The VPRS is available in five standard sizes: VPRS 1 through 5. The VPRS-1 provides the larger flow rate at a given inlet pressure.
The VPRS sizing depends on the gas flow parameters and is determined by the unit’s (or combination of the units) ability to deliver a maximal projected gas flow at an anticipated minimal inlet gas pressure. Universal Vortex assists in sizing the VPGH.

COMPRESSED NATURAL GAS (CNG) APPLICATIONS

The specially designed VPRS-CNG provides for a single-stage pressure cut of non-heated gas from typically 3,000 psi to the desirable downstream pressure (usually 60-100 psi).

The VPRS-CNG is available in three standard sizes: Mini, Small and Large. At the pressure of 3,000 psi the flow rate of the VPR-CNG is:
Mini – 3,300 scfh; Small – 9500 scfh; Large – 27,700 scfh.

The time of the compressed gas discharge is the most common criteria of CNG operations; Universal Vortex assists in sizing the VPR-CNG for the given flow parameters and advises on the VPR-CNG flow-rate change under declining tank pressure.

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