BPV - VENL0001 Blast Protection Valves

Blast Protection Valves Index page 1 SagiCofim Blast Protection Valve VENL0001 4 Functional tests at Spiez Laboratory with Air Blast Loading Shock Tube 6 2 Frame and fixing design criteria 7 Frame welded on counterframe 7 3.1 Dimensions of frames to be welded to counterframe 8 / 9 3.2 Dimensions of frames to be fixed with screw anchors 10 / 11 4 General constructive and installation features 12 4.1 Frames to be welded on embedded counterframe on metal structure 12 4.2 Frames to be fixed to wall with screw anchors 13 4.3 Frames to be...

Blast Protection Valves Abstract SagiCofim blast protection valves BPV-VENL0001, are designed as safety devices capable of preventing any pressure wave due to sudden overpressure from entering air inlets and outlets. These valves are widely used in petrochemical and chemical industry, whenever temporary and immediate protection is required downstream a closed environment and the nominal air flow cannot be discontinued for too long. SagiCofim Blast Protection Valves can ensure an effective protection of all HVAC plants installed in buildings located in potentially explosive areas. In such plants...

Blast Protection Valves 1. SagiCofim Blast Protection Valve VENL0001 1.1 Description Blast Protection Valves under code VENL0001 are mechanical self-actuated devices operated by the elastic forces acting on blades. Valves consist of stainless steel blade shutters installed within a modular die-cast aluminum alloy body, anodized for corrosion protection. Under normal conditions the device is at rest and its blades are fully released, positioned at the center of the valve body thus allowing the airflow passage. The blade shutters are designed to be tensioned and positioned into the valve seats by...

Blast Protection Valves 1.2 Technical details Blast valve general data - Model BPV-VENL0001 mm 400 x 181 x 100 Operation in both directions Pressure range Blast duration Airflow range Outstanding feature Body material Aluminum alloy Peak pressure downstream Blades material Stainless steel Closing time Temperature range Airflow rate per valve (m3/

Blast Protection Valves Engineering SagiCofim 1.3 Tests & Performances The physical characteristics distinguishing the phenomenon of blast are: a) the incident pressure: the pressure the structure being protected (hence the valve) shall resist b) the reflected pressure: the pressure perpendicularly reflected by the valve in closing conditions. It is higher than the incident pressure c) the peak downstream pressure: the pressure occurring immediately downstream the valve during the closing time d) closing time: corresponds to the valve operating time and is reckoned from the moment of the...

Blast Protection Valves 2.2 Fixing the valve to the frame The valves are fixed to the frame by means of M12 8.8 screws. Said screws are in any case oversized to the purpose of ensuring very high safety factors, (i.e. > 10). 2.1 Frame design In petrochemical applications, design incident pressure is typically included between 0.1 and 0.5 bar (10 / 50 KPa). As a matter of fact, valves and frames shall be sized instead assuming as design data the reflected pressure, which may greatly affect the incident pressure value depending on the system geometry, on the pressure wave incidence direction and...

Blast Protection Valves ➀ Flanged type ➁ Flat type 3. Dimensions of frames 3.1 Dimensions of frames to be welded to counterframe Civil work must be embedded by L 100 x 10 UNI EU 56 (not supplied) n x 50 (100) Fixing detail: weld with seams 50 mm long at the distance of 100 mm

Blast Protection Valves 3.1 Dimensions of frames to be welded to counterframe C and D mesaurements are merely indicative and will be calculated according to project requirements

Blast Protection Valves ➀ Flanged & ducted type ➁ Flanged type ➂ Flat type 3.2 Dimensions of frames to be fixed with screw anchors Holes ø 12 for HTS / HTS-R anchors ➀ Holes ø 8 Wall opening = A - 260 Holes ø 12 for HTS / HTS-R anchors Holes ø 8 Holes ø 12 for HTS / HTS-R anchors

Blast Protection Valves 3.2 Dimensions of frames to be fixed with screw anchors C and D mesaurements are merely indicative and will be calculated according to project requirements

Blast Protection Valves The blast valve VENL001 is usually employed as a modular element installed on suitable metal containment frames. The valve can operate in any condition of installation (vertical, horizontal), because the elastic deformation of the blade due to an incident pressure wave is much greater than all the inertial effects of the blade itself. Frames of different configurations can be designed and supplied according to the Customer’s needs and requirements. The most common frame versions are: a) to be fixed on an embedded counterframe or on a metal structure b) to be bolted on...

Blast Protection Valves 4.2 Frames to be fixed to wall with screw anchors This solution allows to fix the valves directly to the wall when the openings are not provided with metal counterframe. Our design is based on the conditon that the concrete wall is robust and smooth, therefore suitable to be coupled with the valve frames.

Blast Protection Valves 4.3 Frames to be fixed to wall with screw anchors and provided with a spacer plenum In case wall openings are available but their size is not compatible with the blast valves size, it is possible to employ specific frames which are provided with a spacer plenum allowing to couple different sections and permitting the air to flow. As far as sizing and fixing are concerned, the same criteria of the previous paragraph apply.

Blast Protection Valves 5. Maintenance recommendations Since blast valve systems contain no moving details, they do not need any specific maintenance nor spare parts are required for their ordinary use and maintenance. We suggest to clean the valves periodically with clean water or compressed air, in order to remove any possible foreign body from them or from the shutter surface. If necessary, each single valve can be removed from its support frame unscrewing the 4 M12 bolts which fix each single valve. We strongly recommend not to disassemble the blast valves! If necessary, SagiCofim will provide...