ERREESSE Valves srl

Via delle Betulle 8A/8B/8C
Grignasco,  28075

Italy
+39 0163415925
+39 0163415941
http://www.erreesse-valves.com
  • Booth: 3849


We are what we do, excellence then is not an act but a habit

ERREESSE production range includes top entry and side entry ball valves up to 72”, an excellent choice for the Oil & Gas, LNG, Petrochemical, Power Generation and Geothermal Industries. ERREESSE valves are designed to handle extreme conditions in severe service applications and processes with acid solutions or with higher cycle frequencies.


 Press Releases

  • VRS TOP ENTRY RISING STEM

    Corrosion is a gradual loss of material by chemical or physical reaction with the process fluid; depending on concentration, temperature and pressure drop all surfaces exposed to process fluid can be seriously damaged impairing the performance of the valve, unless the correct valve type and materials are selected. The right, conscious and diligent selection of both non-metallic and metallic materials along with their proper handling are very important issues from a safety viewpoint.

    There are many difficult applications which are challenging to the valve’s ability to provide acceptable duration and performance, VRS TOP ENTRY RISING STEM are designed to appropriately handle severe service applications, whether such applications are corrosive with acid solutions or have higher cycle frequencies and higher pressure and temperature:

    Molecular sieve dehydration

    Dryer switching

    Suction and discharge isolation

    Hydrogen service

    Heat transfer

    Flowlines

    Emergency shutdown

    Geothermal applications

    The special helix-non-contact stem design ensures low maintenance excellent for frequent cycling, while the ball movement off the seats allows a cleaning action of the ball surface with no friction during opening and closing with a considerable reduced torque, the tiling operation movement before rotating causes high velocity flows around the sealing surface that flush away every foreign material from the seat. It’s a combination of a quarter-turn ball valve with a linear movement of the non-rotating stem where sealing is achieved by the compelling force of the actuator.

    Any advanced technology is indistinguishable from magic.


 Products

  • VRS TOP ENTRY RISING STEM
    Designed to appropriately handle severe service applications, whether they are corrosive with acid solutions or have higher cycle frequencies and higher pressure and temperature. Excellent choice for extreme and challenging applications....

  • VRS model ensures a perfect performance at primary and secondary sealing thanks to an accurate design considering soft and metal seated configurations. VRS model is designed to provide a frictionless sealing structure where the ball is detached from the seat by a linear movement before the rotation takes place: this long-life design significantly reduces valve torques and minimizes maintenance frequency allowing maintenance and inspection inside the valve without removing it from the pipeline. Seat tightness to ANSI FCA-70-2 Class VI for metal seated valves is achieved with lapping technique over sealing surface of the ball and seat ring. In the fully open position, the stem is raised to its maximum limit and there is no contact between ball and seat. The interaction between precision helical guideway and guide pin makes the stem and ball rotate up to 90°C, with still no contact between the ball and seat to avoid any damage to sealing surface. Once the ball has turned 90° the stem stops its rotation and continue with its linear movement, thus makes the ball and valve seat closely contacted. This movement of the ball achieves a positive sealing when the valve is fully closed.


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