vent-panel-7The SFC and CFC explosion vent panels 
 are prebulged, circular vent panels utilising a solid metal or a metal/Teflon construction. The SFC vent panel is available in sizes 10″ through 36″ (25 cm through 91 cm) diameter. The CFC vent panel ranges in size from 10″ through 30″ (25 cm through 76 cm) diameter. Both panels are available in burst pressures ranging from 2.0 psig (0,14 barg) to 10 psig (0,69 barg), depending on the type vent panel.

SFC and CFC vent panels are designed to operate under conditions of positive pressure up to 70% of the vent panel’s minimum burst rating and under vacuum conditions of up to 14.7 psig (1,01 barg). These prebulged designs are excellent for applications operating under cyclic, positive to negative pressures and full vacuum conditions.

The SFC solid metal vent panel features an aluminium preformed circular panel with a 316SS outlet ring and 316SS handling support to provide rigidity to the panel. The SFC vent panel is available in burst pressures from 2.5 psig (0,17 barg) to 10 psig (0,69 barg). See Table V for size and pressure specifications.

The CFC composite vent panel features a preformed circular panel usually constructed of 316SS top section, Teflon seal, and 316SS handling support to provide rigidity to the panel. The CFC vent panel is available in burst pressures from 2.0 psig (0,14 barg) to 10 psig (0,69 barg). See Table VI for size and pressure specifications.

Burst Tolerance and Maximum Operating Pressure

SFC type vent panels have a burst tolerance of ± 1.0 psig (0,07 barg) for sizes 10″ to 16″ (25 cm to 41 cm) and ± 0.5 psig (0,035 barg) for 18″ to 36″ (46 cm to 91 cm).

CFC type vent panels have a burst tolerance of ± 1.0 psig (0,07 barg) for sizes 10″ to 16″ (25 cm to 41 cm) and ± 0.5 psig (0,035 barg) for sizes 18″ to 30″ (46 cm to 76 cm).

To determine the recommended operating pressure, subtract the burst tolerance from the vent panel’s burst rating which establishes the minimum burst pressure, then multiply by 70%. For example, a 14″ (36 cm) SFC or CFC vent panel rated 3.0 psig (0,21 barg) will have a minimum burst pressure of 2.0 psig (0,14 barg) and a recommended operating limit of 1.4 psig (0,09 barg). (Burst rating minus burst tolerance x .70).

Vacuum Support

A vacuum support is available for either the SFC or CFC type vent panel  to provide:

• durability under exterior windloads

• support under full vacuum 14.7 psig (1,01 barg)

The vacuum support is supplied in 316SS with a gasket of black neoprene, silicone rubber or fiberglass. Refer to Table V and VI for SFC-V and CFC-V minimum burst pressure specifications.

Burst pressures below the minimum stated for a CFC-V may be available when system vacuum conditions are less than 14.7 psig (0,10 barg). Consult the factory for lower burst ratings.

You can contact us by Phone 01726 844707 , Email : or using the enquiry form below

Some of our customers testimonials

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

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  Assentecha-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

Project Manager, Vopak Limited

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

Project Manager, Navigator Terminals Seal Sands