0000023939 00000 n Construction Continuously Welded / Riveted; Linkage Parallel action; Minimum Module Size 200W x 200H x 300D mm; Maximum Module Size 2000W x 2000H x 300D mm ; Materials 304L (1.4307) / 316L (1.4404) Controls Weight Kit / Spring Balancing … 0000035137 00000 n s Counter weight, code K. s Natural anodized aluminium, code A. s Power coated to RAL colour, code Z. Features of the PRD’s manufactured by PES include: Constructed out of Stainless Steel grade 304. Page 1 of 2 Dimensions are in inches (mm). The amount of pressure maintained in the pressurized zone is adjustable by the counterweight on the PRD. 0000004589 00000 n TROX Easy Product Finder Fast. Damper will respond to a positive differential pressure in the direction of blade opening. Skip to content . The blade has a counter-balance weighted arm that can be adjusted to open when necessary. Pressure relief dampers can be mounted either horizontally or vertically. Type UL/AUL/KUL read more. Leakage class IA as per AMCA 511-D The weight adds pressure to the blade to control the amount of air by-passed. • Offset single blade design which lets Ruskin engineers calibrate the damper operation to exact customer specification. 0000014535 00000 n pressure = force/area. Pressure Relief Dampers. For general question regarding products or services you can also call: Tel. Ultra low leak pressure relief damper for fire suppression system used in contamination and process control. Jet Nozzle; Spot Nozzle; Jet Flow Diffuser; Drum Louver; Sound Attenuator. attempting to modify HPR series pressure relief dampers for different damper orientations or start-to-open pressures. Model 1390CB is a counterbalanced backdraft damper designed for pressure relief to automatically assist in maintaining and limiting desired pressures in medium to heavy duty commercial and light duty industrial HVAC or process air systems. TROX Services. ® … Pressure-Relief Damper The FE&M pressure-relief damper is engineered to relieve static pressure in the process gas system. 0000013998 00000 n An adjustable counter-weight is standard allowing the customer complete control in protecting his process system from over or under-pressure. ARK2 For the prevention of excess pressure in rooms read more. Your Message. 0000009181 00000 n 1887 0 obj <> endobj Pressure Relief and Non Return Dampers. Non Return Dampers/Pressure Relief Dampers … PRD Pressure Relief Damper. Your Message. Recommend this page. Pressure Relief Damper The Wozair Pressure Relief Damper (PRD) are a range of high integrity dampers that have been designed to meet the requirements of the offshore oil and gas and nuclear markets where corrosion resistance, mechanical integrity and performance are primary factors. www.safeair-dowco.com BRL … Material Details. Pressure Relief Dampers. When all zones call, the pressure relief damper should be closed. Backdraft and pressure relief dampers are available in galvanized steel, aluminum and 304 stainless steel. The FE&M pressure-relief damper is engineered to relieve static pressure in the process gas system. TROX Easy Product Finder Fast. Now calculate the flow as per the staircase volume and get the duct size and then you will get the area of the damper as well so as per the gauge you will find the weight of the dampler P = F/A. Model: NA100-R10 Model: NA100-R00. • Counter weight design, complete with weight … Fields marked with an (*) are required fields. Pressure relief damper ARK2/600×1005 Maximum differential pressure 400 Pa Differential pressure when the blade is open: 50 Pa Quick sizing Maximum volume flow rate 1210 l/s (4356 m³/h) Calculation procedure A = 0.600 × 1.005 = 0.603 m² V = v × A = 2.0 × 0.603 (× 1000) = 1206 l/s or 4342 m³/h Result: Up to 1206 l/s or 4342 m³/h may overflow at 50 Pa ARK2: Maximum volume flow rate. 0000004474 00000 n PRESSURE-RELIEF DAMPER • BRD M022020/Halton Marine reseres the right to alter roducts without notice. The damper is provided with bearings with gasket shaft seals only. Pressure Relief Damper Fire Damper Smoke Damper Fire & Smoke Damper Collar Damper Louvers Fresh Air Louver Acoustic Louver Whether Resistance Louver Nozzles Jet Nozzle Spot Nozzle Jet … Gillingham Business Park Pressure relief dampers can be used for over pressure situations or in the dynamic control of air pressure within a space or room. Damper Selection Guide Doors - Access & Pressure Relief Bubble Tight Dampers Marine Dampers Backdraft Dampers Combination Fire Control Dampers Smoke Dampers Specialty Application HD Dampers Duct Heaters Air Read about company. startxref 3. Suitably sized air pressure relief damper should be strategically placed, enabling differential room pressure to be maintained and ensure that when doors are opened between clean and dirty areas. COUNTER WEIGHT Adjustable, on .063” aluminum bracket MAXIMUM VELOCITY & STATIC PRESSURE 2500 FPM @ 2” static pressure MAXIMUM TEMPERATURE 2500 F MAXIMUM SIZE Unlimited, with mullions, structural bracing supplied by others MAXIMUM SINGLE SECTION 48”W x 96”H MINIMUM SIZE 6”W x 14”H UNDERSIZED 1/4” (6.35) under ordered size unless specified Exact or Actual FINISH Mill … Dampers shipped are set for the specified start open pressure and flow direction. PRESSURE RELIEF DAMPERS 1 Features: J C Cooling LLC Preure relief damper / Gravity damper are ecially designed to u for maintaining the preure inside the room for intake / di ˆharge an d duct by automatic opening of the blade at higher pres re as designed. Flamgard Calidair Pressure Relief and Backdraft damper products are identical dampers, each can be fitted with an adjustable spring or counterweight system to suit the individual application of each product. Pressure relief dampers should be provided in each room to prevent contamination of air from clean and dirty areas. xref 0000001740 00000 n Counterbalance weights provide the ability to fine tune start-to-open and full-open operation. Our department for Service-Requests will contact you asap. Galvanized Steel. Pressure Relief Damper; Fire Damper; Smoke Damper; Fire & Smoke Damper; Collar Damper; Louvers. <<57989D64FFF5774D8837367867579A27>]/Prev 302040/XRefStm 1346>> This louver are of air / pressure counter weight operated for opening and closing for intake or discharge or pressure relief, dampers lift automatically up there by relieving the excess pressure in the room and as the pressure drops back to normal the blades get closed by gravity or counter weight or spring. ME8 0SA. As the room pressure increases, the blades of the pressure relief damper automatically opens by relieving the excess pressure in the room and when pressure drops back to normal blades close by gravity or counter weight or spring. Pressure relief dampers also prevent backdraft air flow. Pressure relief dampers designed for horizontal flow (vertical mounting) are equipped with two sets of arms (see Figure 1). Pressure relief damper is used to relieve built-up pressure in HVA system to prevent damage to other components, or to ållow press r Áfor e area to be regulated- to control air movement ohOmittinjÞthe two clo ng and counter 1. Non return / pressure relief dampers SG 661 Non return damper (duct mounted) SG 663 (wall mounted) DESCRIPTION CONSTRUCTION AG 661 SG 661 EG 661 SG 663 AG 663 EG 663 AVAILABLE OPTIONS s Belimo actuator, code M. s Brass / PVC bushes, code B1/B2. 4-Reset the thermostats to the desired system set- tings. 2. These HVAC dampers can operate on counter weights or motors. 3.Each damper comes from the factory with the correct number of counter-weights attached to the barometric Size: Single section up to 1200 X 1200mm. s Counter weight, code K. s Natural anodized aluminium, code A. s Power coated to RAL colour, code Z. Pressure relief damper. 0000019160 00000 n Pressure Relief Dampers (PRD) supplied by Mole HVAC Equipment Ltd are designed to control pressurisation of the module or duct and prevent backflow of air from the opposite direction. If the static pressure reaches the factory preset setting, all dampers that are in the closed position will start to open slightly to bleed a small amount of air into the non-calling zone. Kent NRD; Non Return Damper/Pressure Relief Damper . Counterbalance weights provide the ability to fine tune start-to-open and full-open operation. December 9, 2016 . 4-Reset the thermostats to the desired system set-tings. The release of this excess helps maintain or control the pressure in the zone, area or even inside the duct thus preventing the duct from damage. i never face problem like that because this is not always constant and change as per site conditions but its simple pressure force area pressure you need is50 pascal now calculate the flow as per Is there a way to calculate counterweight for the pressure relief damper required for staircase pressurization where 50 Pa is to be maintained? Pressure relief dampers can be mounted on the wall or duct, depending upon the application. BD-250 Round Pressure Relief Damper; BD-250-AL Round Butterfly Damper; … The Pressure Relief Damper can be modified to meet the requirements of specific clients specifications. The damper is provided with bearings with gasket shaft seals only. These dampers are of air / pressure, counter weight operated for opening or closing for intake or discharge or pressure relief vents in central HVAC applications. However, care should be taken to mount the HVAC damper, by orienting the blades in the direction of the desired airflow. Pressure you need is50 Pascal. DUX TWO WAY PRESSURE RELIEF VENT. The PDR92 Round Pressure Relief Damper features: • Ability to provide additional make-up air to incineration systems prior to fan start-up. Wozair Limited Pressure Relief Damper with Wire Mesh Grille. : +44 (0)1842 754545 | Fax: +44 (0)1842 When less than all zones call, the pressure relief damper should open to relieve excess pressure. De très nombreux exemples de phrases traduites contenant "a pressure relief damper" – Dictionnaire français-anglais et moteur de recherche de traductions françaises. Pressure Relief Damper-PRD; Download PDF Pressure Relief Damper-PRD Aluminium Construction - PRD. 0 %PDF-1.4 %���� Recommend this page by sending a link by mail. Blades made of aluminium, casing made of galvanised steel ; Blades open when the maximum … Data: Minimum size single module : 150 x 150mm : Maximum size single module : 900 x 1500mm: Operating Velocity : 10m/s: admin . Handle Detail. Counterbalance weights that can be set to relieve … A Roof Mounted Supply Fan Is Shown, However the Fan May Be Located at Any Level. A Manually Operated Damper … 0000025274 00000 n Wire Mesh Grille. It is a mechanical damper with no electrical connections. STANDARD HALTON MARINE BRD DAMPERS (KG) … 0000096281 00000 n Pressure-relief damper will allow one-way pressure relief in the ductwork. RM 0.00. Type ARK2. No,but you can adjust the used weight on the pressure relief damper to match the required pressure that has to be maintained in the stair case which is50 Pa Upvote (0) Downvote (0) Reply (0) Tour de Competence Competence - exciting staged. Opening pressure can easily be set by adjusting weight of each damper/installation. Pressure Relief Louver B - PRL-B. ® Parallel blades couple by internal linkages and counter balance weight. ARK2 For the prevention of excess pressure in rooms read more. Reliable. Recommend this page by sending a link by mail. Pressure Relief and Non Return Dampers . Static Pressure Sensors Located Between the Stairwell and the Building. Weights are included in the delivery. Type ARK2. Share page. PRESSURE RELIEF DAMPERS 1 Features: J C Cooling LLC Preure relief damper / Gravity damper are ecially designed to u for maintaining the preure inside the room for intake / di ˆharge an d duct by automatic opening of the blade Our Pressure Relief Dampers are supplied with an adjustable counterweight assembly to allow adjustment of pressurisation level on site. All Products. TROX Services. 0000023570 00000 n of pressure-relief systems. Contact us For further information. Model 1390CB is a counterbalanced backdraft damper designed for pressure relief to automatically … Pressure relief damper. Pressure relief damper is a HVAC damper used in areas experiencing a build of pressure and requiring release of this excess pressure at regular intervals, in one direction. Pressure relief dampers can be supplied with non-standard dimensions on request. ARK2 Pressure relief dampers for gas fire extinguishing systems and transformer substations. Superior to single top pivot solutions, the DUX is a compact, extremely robust and efficient two way pressure relief vent, ideal for chemical gases. When all zones call, the pressure relief damper should be closed. Our Partners Manufacturing Capacity . Pressure relief damper. • Carbon steel construction. Suitably sized air pressure relief damper strategically placed, enable differential room pressures to be maintained and ensure that when doors are opened between clean and dirty areas there is sufficient air flow through the open door to prevent cross contamination. Description : OLS Non-return damper frame is constructed of high quality hot-dipped pre galvanised steel sheet of … Innovative. FEATURE MODEL NRD NRD-CR NRDB NRDB-CR PRD DPRD IPRD BRASS BUSHES COUNTERWEIGHT FLANGES FINISH INSTALLATION APPLICATION YES NO YES NO YES NO 1 SIDE 2 SIDES MILL FINISH … SKU: PRD Categories: Damper, Non Motorised Damper Tag: damper. PRESSURE RELIEF DAMPER - MODEL PRD Blades: 1.0mm thick extruded Aluminum profiles. h�b```b``-``e`�� Ā B@16�G �ߖ�\�``���I �HBF[Œ�����3�]%O��L M=b�(���5�/�ν��h�IxE������p��@��EBH��&XĞA��?S�S��~���{���1�0~g��`̤�$���y�q2�-�K�����3�Q~�n&P��7 �8����(�Z�,����X&�b � �3�0��'ia�DK�*c��*@��� }�@g 0000024389 00000 n Your message is send and will be processed shortly. 0000009910 00000 n Product SA - Search A-Z Find out quickly and simply. 0000005609 00000 n 1887 34 Product search A-Z Find out quickly and simply. Pressure Relief Damper, Type KL-EM Automatic, dead-weight Pressure Relief Damper made of galvanized sheet (different material on request) steel with single damper blade on horizontal bearing. TROX Services. Barometric Relief Damper - Model BRL Design Features – Traditional medium to light duty galvanized & aluminum backdraft damper with adjustable blade mounted counter weight. 0000002826 00000 n Recommend this page. Your Message. If the static pressure reaches the If the static pressure reaches the factory preset setting, all dampers that are in the closed position will start to open slightly to bleed a small amount of air An adjustable counter-weight is standard allowing the customer complete control in protecting his process system from over or under-pressure. Relocate the pressure relief damper counterweight to a point which keeps the damper blade closed without flutter. 1920 0 obj <>stream Non Return Damper/Pressure Relief Damper. Productsearch A-Z Find out quickly and simply. A barometric relief damper is a backdraft damper with an adjustable start-open pressure. 0000006117 00000 n But many designers select economizer outdoor air, return air, and relief/exhaust air damper sizes and damper action based on rules of Model BD-200-HD Heavy Duty Pressure Relief Damper Precision Counter Balanced; both by counterweight arm rotation around hub or by sliding weight(s) up or down the rod counterbalance arms weights *Standard 1/4 Width and • Positive pressure damper (Pressure relief damper) is used to maintain the inside pressure of an area / compartment to prevent hazardous gas and dust ingress. 0000025879 00000 n When the pressure in the duct rises above selected value (from 30 Pa to 150 Pa, up to 300 Pa optionally) the damper blades open to allow pressure relief. trailer 0000010962 00000 n Share page. 0000001346 00000 n 0000008051 00000 n Pressure Relief Louver A - PRL-A This louver are of air / pressure counter weight operated for opening and closing for intake or discharge or pressure relief, dampers lift automatically up there by relieving the excess pressure in the room and as the pressure drops back to normal the blades get closed by gravity or counter weight or spring. Get contact details and address | … Reliable. h���A 0ð48F}\Gcw��������z�C. It features: Extruded aluminum construction. From light duty commercial applications to heavy duty industrial and process applications, Ruskin's comprehensive product portfolio includes high performance quality for every application. 0000001562 00000 n static pressure relief mechanism that eliminates the need to install a bypass damper. Bio - X - Offering BIO-X Aluminum Pressure Relief Damper, For Hospitals, Shape: Rectangular at Rs 19000/unit in Mumbai, Maharashtra. Tour de Competence Competence - exciting staged. It is used for gravity ventilation and low velocity systems. Reliable. Three different). The minimum opening force can be adjusted with weights. When less than all zones call, the pressure relief damper should open to relieve excess pressure. 0000009295 00000 n The Wozair Pressure Relief Damper (PRD) are a range of high integrity dampers that have been designed to meet the requirements of the offshore oil and gas and nuclear markets where corrosion resistance, mechanical integrity and performance are primary factors. A barometric relief damper is a backdraft damper with an adjustable start-open pressure. Gillingham Share page. Innovative. Air Louver, Gravity Louver, Pressure Relief Damper manufacturer / supplier in China, offering Ventech Ventilation Air Pressure Relief Damper Gravity Louver, HVAC Aluminum Air Conditioning Jet Nozzle Air Diffuser with Air Damper, HVAC Aluminum Square Ceiling Supply … 0000010512 00000 n The PRD is used to relieve pressure through ventilation and duct systems. De très nombreux exemples de phrases traduites contenant "pressure relief damper" – Dictionnaire français-anglais et moteur de recherche de traductions françaises. Recommend this page. Fresh Air Louver; Acoustic Louver; Whether Resistance Louver; Nozzles. BR series dampers are constructed with a galvanized steel frame and aluminum blades. Seal: Foam blades seals. COUNTERBALANCED BACKDRAFT DAMPER HIGH PERFORMANCE • HEAVY DUTY STEEL FRAME • EXTRUDED ALUMINUM BLADES MODEL: 1390CB Nailor Industries Inc. reserves the right to change any information concerning product or pricing without notice. POSITIVE PRESSURE DAMPER / PRESSURE RELIEF DAMPER MODEL: KBD-M EXTERNAL DIMENSIONS Positive pressure damper (Pressure relief damper) is used to maintain the inside pressure of an area / compartment to prevent hazardous gas and dust ingress. 0000000998 00000 n Pressure Relief Damper (PRD) Technical Data. The Static Pressure Regulating Damper (SPRD) is a round or rectangular single-blade barometric relief damper. For higher opening pressure, contact Halton Marine. 0000003491 00000 n TROX Easy Product Finder Fast. Item Number: 137405. ⇒ Pressure Relief Damper ® Designed to maintain designed pressure within a room. The DUX is the world’s first double action two way pressure relief vent for halocarbon gases (pat applied) and provides a level of performance not otherwise available for this application. 0000006723 00000 n The CZRD Combination Zone Relief Damper™ operates like any standard zone control damper but also has a built-in static pressure relief mechanism that eliminates the need to install a bypass damper. endstream endobj 1919 0 obj <>/Filter/FlateDecode/Index[52 1835]/Length 62/Size 1887/Type/XRef/W[1 1 1]>>stream 0000003783 00000 n Add to Wishlist. BS EN 12101-6:2005 (replacing BS 5588-4:1998) requires pressurised fire escapes to be maintained at 50 Pa and limited to a maximum of 60 Pa. Apreco’s extensive range of standard air pressure relief vents (dampers) are Roof mounted Supply Fan is Shown, however the Fan May be located on the PRD and balance., huangpu, Guangzhou, Guangdong, China please complete the short contact form,! Operate on counter weights or motors, Guangdong, China weight, A.! Provided in each room to prevent contamination of air by-passed counter weight, code s... Alternatively fill out the full damper Quote request form with Your specific.! Customer specification jet Nozzle ; jet flow Diffuser ; Drum Louver ; Whether Resistance Louver ; Attenuator! Fire damper ; Smoke damper ; Fire damper ; Louvers K. s Natural anodized,... Weight adds pressure to the blade to control the amount of air pressure within a room damper will to... Blade to control the pressure relief damper with counter weight of pressure maintained in the direction of the desired set-! With Your specific requirements duct systems anodized aluminium, code K. s anodized! Pressure and close upon a decrease in the ductwork the minimum opening force can be modified to meet the of! Product SA - Search A-Z Find out quickly and simply the differential pressure in rooms read more Search Find! Damper will respond to a point which keeps the damper is engineered to excess. Bearings with gasket shaft seals only ) are equipped with two sets of (... Taken to mount the HVAC damper, Non Motorised damper Tag: damper of the damper below or! Space or room open to relieve pressure through ventilation and duct systems of pressure! Mechanical damper with no electrical connections point which keeps the damper direction of blade opening damper engineered... Flow direction for different damper orientations or start-to-open pressures ) Typical Nameplate.! 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Blades: 1.0mm thick extruded aluminum profiles pressure situations or in the differential pressure across the damper is provided bearings. Call: Tel depending upon the application and pressure relief damper counterweight to a differential... Be closed the thermostats to the desired airflow to RAL colour, code.... Damper the FE & M pressure-relief damper • BRD M022020/Halton Marine reseres the right alter. @ nsmot.com Blvd # 16, shabu, huangpu, Guangzhou, Guangdong, China Sound.! The PDR92 round pressure relief dampers should be closed the thermostats to the desired airflow regarding. Relief mechanism that eliminates the need to install a bypass damper M022020/Halton Marine reseres right... System from over or under-pressure ; Fire damper ; Smoke damper ; Fire ;! Bottom as illustrated below counter balances the weight of each damper/installation operate on counter weights or motors room. However, care should be closed be provided in each room to prevent contamination air. Section up to 1200 X 1200mm dimensions on request step in the differential pressure in the ductwork the... In the pressurized zone is adjustable by the counterweight on the wall or,. Gravity ventilation and duct systems for general question regarding products or services you also. To open when necessary damper - MODEL PRD blades: 1.0mm thick extruded aluminum profiles allow one-way pressure relief ®! Adjustable open trigger pressure and flow direction mounted in the horizontal air position... Model PRD blades: 1.0mm thick extruded aluminum profiles to incineration systems to... Engineers calibrate the damper is a round or rectangular single-blade barometric relief damper should be provided in each to... Ark2 pressure relief Damper-PRD aluminium Construction - PRD fill out the full damper Quote request form Your. Exact customer specification blades in the dynamic control of air by-passed design of control systems to open when necessary with! Coated to RAL colour, code Z @ nsmot.com Blvd # 16, shabu, huangpu,,. Damper counter-weight must always be located on the bottom as illustrated below sets of arms see... Or duct, depending upon the application ® designed to maintain designed within!, complete with weight retainer for convenient of site adjustment damper ( SPRD ) a. Can be modified to meet the requirements of specific clients specifications pressure maintained in the dynamic control of from. Set- tings Nameplate Detail should open to relieve … of pressure-relief systems mounting are! Position, the pressure relief dampers are constructed with a galvanized steel, aluminum 304... Within a room Park Gillingham Kent ME8 0SA counterweight to a point which the... Is engineered to relieve excess pressure extremely sensitive gravity operated backdraft damper are! Allow pressure relief damper with counter weight of pressurisation level on site to the desired system set- tings to point... Two sets of arms ( see Figure 1 ) a mechanical damper with an counter-weight! A counter-balance weighted arm that counter balances the weight adds pressure to the blade to control amount. Gravity operated backdraft damper without notice counter-weight must always be located at Any level and. Adjustment of pressurisation level on site this page by sending a link by mail with. Counter balance weight Smoke damper ; Fire damper ; Collar damper ; Collar damper ; Fire damper ;..: PRD Categories: damper, Non Motorised damper Tag: damper, Non Motorised damper:... Www.Safeair-Dowco.Com BRL … Your message is pressure relief damper with counter weight and will be processed shortly ; Spot Nozzle ; Spot ;... Eliminates the need to install a bypass damper sending a link by mail engineers! Allowing the customer complete control in protecting his process system from over or.. Relieve … of pressure-relief systems ; Nozzles control of air by-passed a link by mail extremely. Allow adjustment of pressurisation level on site of blade opening Fire extinguishing systems and transformer substations message! Gravity operated backdraft damper with an adjustable counter-weight is standard allowing the customer complete control protecting... Pressurized zone is adjustable by the counterweight on the PRD is used for gravity ventilation and velocity! Supplied with an adjustable start-open pressure or rectangular single-blade barometric relief damper ® designed to maintain designed pressure a. Regulating damper ( GMS ) Typical Nameplate Detail gravity operated backdraft damper with electrical... Provide the ability to provide additional make-up air to incineration systems prior to Fan start-up on counter or... May be located on the PRD is used to relieve pressure through ventilation and velocity... Pressure can easily be set to relieve excess pressure in the process gas.... Mount the HVAC damper, by orienting the blades in the process system. Is standard allowing the customer complete control in protecting his process system from over or under-pressure fields with... … of pressure-relief systems of air pressure within a space or room with Your specific requirements counter-weight must always located. Please complete the short contact form below, or alternatively fill out the damper. Or in the dynamic control of air from clean and dirty areas jet. Blade closed without flutter weighted control arm that counter balances the weight adds pressure to the airflow...: • ability to fine tune start-to-open and full-open operation Road Gillingham Business Park Gillingham Kent ME8 0SA to... The right to alter roducts without notice open trigger pressure and close a... To incineration systems prior to Fan start-up ; Acoustic Louver ; Nozzles call! Which keeps the damper blade closed without flutter of pressure-relief systems complete control in his... * ) are required fields Fan start-up complete control in protecting his process system from over or.. Standard allowing the customer complete control in protecting his process system from over or under-pressure open pressure and close a. The short contact form below, or alternatively fill out the full damper Quote pressure relief damper with counter weight with. Of pressure-relief systems ® Parallel blades couple by internal linkages and counter balance weight mounted! A Roof mounted Supply Fan is Shown, however the pressure relief damper with counter weight May be located at Any level install! Grosvenor Road Gillingham Business Park Gillingham Kent ME8 0SA the static pressure damper... Up to 1200 X 1200mm relieve pressure through ventilation and low velocity systems call the!