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Documented compliance to EPA’s Method 21 testing (<500 ppm leakage at 90% of set pressure)
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Available in flange sizes 18″ – 24″ (consult us for other sizes)
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ANSI 150# and API 650 drilling
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Derakane, Furan, carbon steel,316 SS, and other body materials available
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Full lift by 20% overpressure
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Trim available in 316 SS or Hastelloy C
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Standard FEP diaphragm
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Pressure settings 5 InWC to 6 PSIG
Emergency Relief Valve – Pilot Operated Model 2500A is designed to provide emergency relief capacity beyond that furnished by the normal operating pressure relief valve on the tank. The valve protects the tank against rupture or explosion that could result from excessive internal pressures caused by an external fire, etc. Model 2500A is designed to be self-closing. As excessive pressure builds up, Model 2500A relieves, then reseats when overpressure has been dissipated.
Model 2500A is designed to assist in meeting the requirements of the 1990 Clean Air Act Amendments as best available control technology. Unit provides the capability to meet the leakage rate requirement of 500 ppm or less. This pilot-operated valve with large actuator is the only proven way to insure the necessary sealing force to meet the requirement. The Model 2500A is built of corrosion resistant materials throughout, which allows it to be used in severe service environments, i.e. ethylene dichloride, methylene chloride.
Related pressure and vacuum safety-relief products
- Assentech have extensive experience in the supply, installation and servicing of tank equipment from all manufacturers, as well as a full understanding of the theory, standards and legislation that applies.
- Assentech supply all Groth's Product Range ( We are the UK'S Exclusive Supplier for Groth Corporation).
If you or your team want to know more about Tank Venting or get up to speed with the latest changes to API2000 we will be happy to run a technical seminar or lunch and learn session for you. We make no charge for the sessions for end users or groups of 5 or more people.
Some of our customers testimonials
Assentech- pilot operated pressure relief valves service and calibration
After conducting a Third Party Witness Inspection, I was most impressed with Ewart and his team, their professionalism, and product knowledge I found to be excellent.
Ian Johnston
Assentech- Geodesic Dome Installation
Assentech were subcontracted to assemble and install a 25m geodesic dome for Shaft G on the Lee Tunnel project. My experience with Assentech from pre-contract through to assembly has been very positive. Unlike other subcontractors I have experienced on this project, Assentech had a very positive attitude to producing the level of documentation required for a project of this scale. Leading to a high quality pre construction packaged approved in a timely manner. The communication regarding the manufacturing process was first class allowing us to easily plan our works and prepare the site. Dome assembly was carried out very efficiently and completed to programme. The task was correctly resourced and well supervised. The work force had a positive attitude and carried out the task safely. In summary from my perspective it has been a very easy subcontract to manage with a high quality finished product.
Robert Colthorpe
Assentech wins supplier excellence award from Eastman Chemicals
We were extremely pleased with the level of service and professionalism demonstrated by Assentech, right from our initial enquiry, through delivery and post installation. As a recipient of only two of these awards made by Eastman Chemical Company in the UK, based on performance in 2014, Assentech are rightly proud of their achievements.
Assentech-IFR Installations at Vopak, Teesside
As you said “you delivered what it said on the tin”. On time and on budget. Your up front engineering to determine the suitability of your product for our application was second to none, i have not seen anyone else in the industry pay as much attention to detail before you get the purchase order number as Assentech.
Garry Lee
Assentech-IFR Installations at Navigator Terminals
Assentech have supported our Navigator Terminal (formerly known as Vopak Teesside) on two important projects by providing technical assistance and supplying and fitting a total of 11 Internal floating roofs. Both projects have been completed on schedule and on budget. Assentech have provided an excellent level of experience and front end engineering support with high quality drawings and documentation. Their specialist on site labour have worked collaboratively with us and Assentech have proven to be open, honest and flexible partners.
We have experience of both their Heavy Duty Pontoon type and Full Contact IFR’s and we continually monitor operation and performance of all lFR units Installed on site and consider the Assentech supplied Matrix brandto be the best in the market with exceptional build quality and rigidity. Our clients have inspected the installations and have always remarked upon the build quality and have been impressed with their strength in fully supporting up to four people without noticeable deformation. The design and construction of their stainless steel shoe seals continue to prove to operate excellently with no noticeable reduction in performance or flotation ability over the time since Installation.
Assentsch have proven to be extremely competitive on price and their installation and inspection activities have always been thorough. Navigator therefore have no hesitation in recommending Assentech to other companies considering their services.
Brian Beddow
