Would You Buy a Parachute based on just Price?

We only supply high quality breather valves ( pressure vacuum relief valves)

Sometimes we forget that tank equipment is SAFETY equipment. Just like a parachute; it protects people and additionally it protects the environment and reduces product losses.

So why do many organisations base their buying decisions around price alone when the actual cost difference between quality (peace of mind) and potentially unregulated products is negligible in the long-term scheme of things?

Interesting question isn’t it?

It’s important that companies make informed choices about such important matters. Here are the top 7 questions Assentech has come up with to help buyers make the right (and safe) choices:

  Will each item be tested to conform to API2000? (batch certificates of conformity isn’t good enough.Individual leakage and calibration certificates demonstrate the tank farm operator has applied due diligence in their product choice)

  Air cushioned pallets? (This will increase the valves sealing ability = better safety/air quality)

  What do the weights look like and what are they made of? Sounds strange but if they are just lumps of lead they will not have the weight distributed evenly = leakage risk). We regularly come across food industry applications with lead weights fitted to vents.

  Are the seats and pallets of a robust enough material (e.g. SS316) to cope with any environmental impacts and wear? (for example an Aluminium valve with an aluminium seat and pallet will wear out much quicker than an aluminium valve with SS316 seat and pallet at a marginal difference in cost)

   Does your supplier understand your application and are not just about getting the sale? Can they offer you sound advice, reliable performance data and detailed product specification sheets? If the supplier shows no interest in the application and says ‘a vent’s a vent’ – walk away! Your staff and your facility are too precious to place into the hands of suppliers that just want your PO number. It takes extra effort, but talk to a few suppliers and compare the advice you get. You’ll know when you are dealing with someone who knows what they are talking about.

  Have you had enough advice to ensure that each valve is adequately sized and delivers the right flow for the conditions it is installed in? (We’ve all heard of sucked in tanks! £££s)

  If it’s a Flame Arrestor, is it specified to the correct Gas Group for your process? (These have changed in the past few years and products such as ethanol now come under the more rigorous Gas Group IIB1)

Feel free to log on to Groth vent sizing software. It’s free! Click here to sign in / register and become an expert yourself. Flush out the chancers. We are always free to assist with getting you up to speed with tips and tricks on how to use it.


Assentech supplyinstall and service full range of storage tank and fluid transfer equipment in the UK and Europe.

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

Director, RAK Inspection

Emergency-Relief-Valve-Pilot-Operated-2500a  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

Site Agent – Lee Tunnel Project, Morgan Sindall

Emergency-Relief-Valve-Pilot-Operated-2500a  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.

Robert Dodgson

TH3 Project Procurement Lead, Eastman Chemical Company

Emergency-Relief-Valve-Pilot-Operated-2500a  AssentechIFR 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

Project Manager, Vopak Limited

Emergency-Relief-Valve-Pilot-Operated-2500a  AssentechIFR Installations at Vopak, Teesside

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 brand to 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

Project Manager, Navigator Terminals Seal Sands