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ES stemless valve

Oxford Flow has been awarded a commendation by the judges of the  ADNOC Group Decarbonization Technology Challenge at COP28 UAE for producing control and isolation valves that eliminate fugitive emissions. Oxford Flow are delighted to be 2nd place following being shortlisted as 1 of 10 finalists from 650 applicants, from the 50 countries which took part.

The American Society of Mechanical Engineers (ASME) has also awarded the ES Stemless Valve the Best Mechanical Engineering Achievement Award.


The ES stemless valves offer world class performance, reliability and emissions control for a wide range of severe service applications in oil and gas, petrochemical and process industries. The ES stemless valves can also be used for transitioning energy systems, including hydrogen and biomethane applications. The ES provides zero-leakage isolation in a variety of materials and configurations from 2” to 12” (DN50 to DN300) and in pressures classes to ASME 1500.


The zero emission ES stemless axial flow valves have fundamentally transformed valve performance.

Because the ES stemless valves do not have an external stem, there is no possibility of fugitive emissions through stem packing leaks. Further, because it does not have a mechanical drive train, it is not subject to stresses and side loading that cause poor performance and premature mechanical failure in other valve types.

With its pressure-balanced trim, the ES can be operated by a compact Electrohydraulic Powerpack, significantly reducing the size and weight of the valve package.

The valve internals are also designed to provide very high flow rates while minimising turbulence. This reduces erosion on sealing surfaces and allows the ES to provide long-term zero leakage in a variety of severe applications.

Value proposition
FeatureDesigned to operate at restricted flow and high differential pressure.
BenefitES withstands high velocities with no cavitation while maintaining tight shutoff.
Value propositionES will reduce process downtime caused by valve failure.
FeatureDoes not have an external stem—a primary source of emissions.
BenefitThe ES does not require stem packing and maintenance to meet emissions requirements.
Value propositionES eliminates stem emissions, reducing OPEX related to valve packing.
FeatureUtilises an Electrohydraulic Powerpack, rather than a conventional actuator.
BenefitThe Electrohydraulic Powerpack is compact, efficient in transmitting force, and only requires 24VDC power and a control signal.
Value propositionThe Electrohydraulic Powerpack reduces valve package size and weight by 50% and reduces installation cost by 30%.
Valve variations

The ES stemless axial flow valves are available in 2” through 12” (DN 50 to 300), in ANSI classes 150, 300, 600, 900 and 1500, in a variety of cast or forged materials, and in weld-end and flanged configurations.