Vent-Less is an award winning and patented range of breather valve test benches. Designed and manufactured by Assentech Sales Limited.

ABOUT US Founded by Ewart Cox in 2009, Assentech is a premier provider of equipment, services, and technical expertise in the realms of Tank Storage, Process Safety and Fluid Transfer. We take pride in supplying and servicing equipment that adheres to stringent international standards, reflecting our commitment to safety, environmental responsibility, and costefficiency. Ewart’s vision was rooted in understanding the high stakes involved in tank storage – the often expensive and potentially hazardous contents necessitate the use of equipment that meets the highest environmental and safety standards....

Innovating for a Safer Tomorrow: The Story Behind the Vent-Less Test Bench “It took us 25 years to become an overnight success! We figured out how to help tank farm operators reduce emissions, enhance safety, profitability, and reliability, all while meeting the expectations of an environmentally conscious public—simply by ensuring tank breather valves function properly. The solution was obvious yet overlooked for decades. These ubiquitous devices are installed on millions of storage tanks worldwide, holding everything from perfume and whiskey to gasoline and paint. Tanks, which have surprisingly...

With over 75% of new valve manufacturers not conducting functional testing of new breather vents to international standards API2000 and ISO28300, it has never been more important for Operators to test new vents prior to commissioning and then keeping test records for aging plant to satisfy requirements of the Regulators and document a path to net-zero. Manual test benches have existed for many years, but results are variable because vents are modulating devices that open incrementally with rising flow. So, determining where set point occurs and leak rate volumes at 75%, 90% or whatever pressure...

Essential Risk Evaluation: Safeguarding Yourself, Your Facility, and Your Reputation • When you procure breather valves, do you always ask for a Production Test Certificate to API2000 section 5.4? Blanket certificates of conformity are not acceptable. • How do you know if your new breather valve has been assembled correctly prior to commissioning? • Can you confirm the set point has been correctly applied and that the breather valve is operating safely and accordance with the specification? • Can you demonstrate that you are following best practice? • Can you demonstrate and evidence reduction...

Why Choose Vent-Less? • Demonstrate to the world that you are leading the way to net zero, by reducing emissions from the biggest leak source on site. • Demonstration of safe working practices to protect the tank, facility and workforce. • Pre-install check which confirms the breather valve is safe and is operating and performing according to the specification. • Knowledge and data are power! They can save you thousands of pounds in lost revenue by minimising vapour losses and helping you prioritise your focus. • Pre-programmed to test to Industry Standards API 2000 and ISO 28300. • The only...

THE VENT-LESS RANGE Revolutionising Breather Valve Testing: Presenting the world’s first range of groundbreaking automated test benches aligned to the test protocol stipulated in the International Standards. Our Test Benches deliver detailed test data for individual breather valves, empowering Valve Manufacturers, Maintenance Companies, Regulators/Auditors, and Storage Facilities to surpass scrutiny. This ensures comprehensive protection for the workforce, tanks, media, the environment, and operational profits, while safeguarding the personnel accountable for these critical decisions. The Vent-Less...

THE RISK MITIGATION TOOL The Vent-Less test bench is a unique technology designed to support professionals across various fields by facilitating the capture of data, evidence of performance, and demonstration of best practice. Environmental Improvement Quality Control Asset Management Pre-test and post-test leak rate measurements provide essential emission quantification, crucial for environmental stewardship and reporting. The VentLess test bench, a unique technology, is the sole method for accurately measuring these rates. Digester pressure relief valves pertain to process and Scope 1 emissions,...

Provides the Breather Valve Manufacture with the Ultimate Tool Optimising Performance for Breather Valve Manufacturers’: Removes Bottleneck in Production, Mitigating Risks, Ensuring Compliance, and Accelerating Operational Efficiency • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Pressure/Vacuum Production Test to API2000 Section 5.4 in as little as 3 minutes. One Operator can run multiple benches simultaneously. Individual device certification includes verified flowcurve, set point check, leakage rate, serial number and customer Tag reference number. Quantification...

ENVIRONMENTAL LEGISLATION • Everyone needs to contribute to reducing global warming emissions. • Tank breather valves are identified as a source of emissions. • Regulators are employing optical gas imaging (OGI) technology to detect leaks. • Advances in satellite technology are now capable of detecting significant methane emissions. Companies like MethaneSAT are publishing this data on the internet via platforms such as Google. • The Industrial Emissions Directive (IED) provides a legal framework that allows Regulators to impose fines and improvement notices under regulations like Regulation...

Bench Features and Benefits Calibrated Flow and pressure are controlled and measured by accurate and precise instrumentation Options include a self-calibration unit. The test bench automatically detects when connected and opens the option to run a calibration test. Compares predetermined multiple flow and pressure data from the bench with its own internal calibrated instrumentation. Produces a full PDF test certificate to demonstrate test bench accuracy. Designed with pin-out instructions for local calibration testing Our mobile test bench includes a patented leveling top plate that achieves...