Bell mouth duct. • Protect duct mouth & minimizes damages to the • Maintenance free, water proofed, rubber sealed ball bearings. The bell mouth is attached to the piping system using standard flange connections, which allow for easy removal and replacement as needed. Choosing an American-made industrial ductwork manufacturer means shorter lead times, better build quality, and dependable support. A bell-mouth may be used in gas or liquid applications and is typically placed on the inlet. Cosworth Formula One engine, with bell-mouthed inlet trumpets for each cylinder, known as a velocity stack A bell-mouth inlet duct is a form of convergent inlet air duct used to direct air into the inlet of a gas turbine engine. A bell-mouth may be used in gas or liquid applications and is typica y placed on the inlet. This imposes only a low-pressure drop on the engine. They are fitted with an adjusting bolt to secure them inside the duct. Flat rim width OD Construction: Bell: constructed from a solid sheet so no seams are present in the bell portion. These fittings are engineered to optimise airflow dynamics, providing a smoother and quieter operation. A flanged bell mouth is a specialized component that is designed to enhance airflow efficiency and reduce noise levels in various industrial applications. Circular Bell Mouths for Ventilation Systems Enhance the efficiency and performance of your HVAC system with our Circular Bell Mouths, specifically designed for use in return air ducts within ceiling voids. Fitted with 4no. When placed on the outlet they may be r ferred to as a difuser. A venturi is a contraction in a longer upstream duct, followed by a diffusing section. The suction from the bell mouth can result in high turbulent kinetic energy at the vortex center. Bell mouths provide a smooth duct end whilst stopping the duct from pushing into the chamber and restricting access on the inside. Typically, most production/commercial rigs like this will induce a tank pressure some 28 inches of water below atmospheric pressure, which is a pressure ratio, PR, of some 1. Bell-mouths are commonly incorporated into a pulsation dampener or anti-surge tank design which contain • Steel bell mouth inserted to ducts & secures with bolt. The purpose of a bell mouth is to lower the pressure drop at the intake into a duct from an open space (or discharge from a duct into an open space). . W/Gasket DS850-10 #BMD 10″ Bellmouth Galv. 07. From: Industrial Hygiene Control of Airborne Chemical Hazards [2019], LES study of transient behaviour and turbulent characteristics of Steel Hinged Bellmouths Minimises damage to the cable and duct edges during cable laying operations For insertion into ducts and secured into position with an expansion bolt Standard sizes are below, other sizes are available - please contact your local office for details The Mini Bellmouth is made in one piece. Bell mouth hoods have flared ends that increase the intake area and help create smooth airflow. steel rollers to ensure the cable does not rub on the duct edge from any angle. It is placed well upstream of any bow wave effects caused by the engine. They are primarily designed and used for return air or extract air purposes within building ventilation systems, more commonly located within ceiling voids or other similar plenum bell of air is sucked through it into the tank by a vacuum pump. The QF (rolled edge) end allows quick connection to Nordfab duct fittings The Quick-Fit rolled edge ends allow for a seamless connection to Nordfab duct fittings. Aery Bellmouth Spigot BM / BMD / BMDO The Aery range provides an efficient way of extracting or taking off air from duct work. Service you would expect from a trusted UK company. Supplies and solutions for every industry, plus easy ordering, fast delivery and 24/7 customer support. Spec Sheet Die Stamped and Gasketed SPIRAmir® Bellmouth Takeoffs are the perfect low-profile Fitting when running Spiral off of flat duct. Bellmouth adapters are short and straight ductwork that can be added to existing systems to maximize pick-up area . BM4R Four Rollered Bellmouth Designed to be placed into the end of ducts to allow easy passage of cables into them. • High quality galvanized finish. • Protect duct mouth & minimizes damages to the cables. The bell-mouth shape allows the maximum amount of air to be drawn into the duct with minimum loss. A bell mouth is a channel used to direct the flow at the intake of the engine, often in a straight or tapered format. 4. Use the Mini Bellmouth where Duct sizings prohibits the use of the BMD Bellmouth. Learn how bell mouths are used in building services engineering, HVAC, and Formula One racing. How does a Bellmouth work? In building services engineering and HVAC, a bell mouth is a tapered expanding or reducing opening in the end of a ventilation duct, so named because the taper can resemble that of a bell shape. US Duct designs and manufactures custom duct systems in the USA for demanding industrial environments. When placed on the outlet they may be referred to… Steel Hinged Bellmouths are inserted into ducts and secured in position with an expansion bolt. Bell mouth explained In building services engineering and HVAC, a bell mouth is a tapered expanding or reducing opening in the end of a ventilation duct, so named because the taper can resemble that of a bell shape. It has a flange style piece that prevents pulling air from behind the duct opening and the low The bell-mouth shape allows the maximum amount of air to be drawn into the duct with minimum loss. To order this product please call: (843)-527-6563 Category: Bellmouths Circular Bell Mouth with Mesh BM-M As part of a ventilation system bell mouths are often used on return air ducts, typically within ceiling voids. They have a cross sectional area approximately double that of the duct on which the bell mouth is installed. A flare is a short duct with an entry bellmouth, fitted immediately in front of the engine. It is the proper fitting as recommended by the ACGIH, that must be used when tapping to a flat surface when space allows. Range of Steel Cable & Duct Bellmouths A bell mouth is a smoothly curved entrance to a duct that produces a uniform face velocity and reduces turbulence compared to plain or tapered duct entrances. These fittings are essential for enhancing air intake quality while maintaining optimal airflow dyna In a pump, a bell mouth refers to a flared inlet that helps streamline the flow of liquid, reducing turbulence and improving suction. What is a Bellmouth Reducer? A Bellmouth Reducer is a specialized fitting used in HVAC, fluid processing, and industrial piping systems. Steel Bellmouths are designed to guide a cable into a duct without damage to the cable or the duct. 20 UK and Worldwide delivery. Circular Bell Mouths with Mesh for Ventilation Systems Upgrade your HVAC system's efficiency and safety with our Circular Bell Mouths with Mesh, specifically designed for return air ducts, particularly in ceiling voids. • High quality galvanized finish Related Products Bell Mouths When bringing a duct into a chamber, Bell-Mouth sometimes called ‘chamber entry connectors’ offer a further level of quality finish. W/Gasket DS850-06 #BMD 6″ Bellmouth Galv. It has a flange style piece that prevents pulling air from behind the duct opening and the low Bellmouth Dimensions Bellmouth is the optimum flow fitting for tapping round pipe or flexhose to a flat surface. All steel construction, zinc plated and fitted with bronze bushes to allow free turning of the rollers. Aug 21, 2025 · Bell mouth duct exist to enhance the airflow characteristics of an HVAC duct by providing a more gradual entrance while reducing the noise and increasing the efficiency of airflow. The QF (rolled edge) end allows quick connection to Nordfab duct fittings. They are made in separable hinged halves. Enquire About this Product Technical Specification BM60 For Ducts 60-69mm BM80 Instantly buy your Nordfab Quick Fit Bell Mouth Hood, clamps, pipe and fittings with BISCO, an authorized distributor. The Flange Bell Mouth is available in a wide range of sizes and configurations to suit different types of piping systems and applications. Bell begins as 18ga; thickness cannot be changed. Easy Online Ordering - Prices - Technical Information - Catalogs - Free Support. It is designed with a gradual, flared opening that allows for a smooth transition of airflow or fluid flow from a larger diameter pipe to a smaller one. Item Codes: DS850-04 #BMD 4″ Bellmouth Galv. Their purpose is to lower the air velocity at the point at which the air enters the duct and allow a gradual increase to the specified The bell mouth is located at the opening of the cable duct pipe to prevent damage to the cable sheath jacket during the pulling of cables. In Capliard's terms a 'shock loss' or more generally a fitting pressure loss. 1. Find here online price details of companies selling Bell Mouth. Bell Mouths Ventilation Ducting | Fabricated Round Fittings | Circular Bell Mouths | Bell Mouths Circular Bell Mouth BM As part of a ventilation system bell mouths are often used on return air ducts, typically within ceiling voids. Nordfab’s QF® Bell Mouth Hood has a flared end to increase the capture ratio of air, dust, and smoke as well as increase laminar air flow. Enquire The Bellmouth Collar with damper (BMD) is a high-effiency takeoff fitting that is ideal for high and low velocity applications. Contact Vinidex Customer Service for availability of products on this page. Get info of suppliers, manufacturers, exporters, traders of Bell Mouth for buying in India. The bellmouth minimises damage to the cable and the duct edges during cable laying operations Buy Jf 110mm Duct Bell Mouth 110bm - £10. Bell-mouth ducts are used in engine test cells and on engines installed in helicopters. In many engines where the packaging is important these could even be designed in such a way that conventional bend tooling would not allow the fabrication of these and dedictated press tooling is needed to create these. BM Steel Bellmouths In separable hinged halves to guide the cable through the duct to avoid damage to both the Cable or the Duct. Nordfab® Quick-Fit® Bell Mouth Adapters are designed with a flared end to increase the capture ratio of smoke, dust, and air, as well as, expand laminar air flow. offers reliable and efficient HVAC solutions for residential and commercial applications. For a bell mouth inlet on a rectangular duct in a return air plenum: using a 6” bell length with 45-degree sides is probably adequate – if it can fit in the available space. Rolled Edge ø SS Bell Mouth Hoods have a lead time of 4-5 business days minimum. A bellmouth, also called a suction bellmouth in connection with centrifugal pumps, is a nozzle-shaped inlet casing component (see Fitting) often employed with vertical tubular casing pumps. Available in galvanized, stainless steel, 3 - 24 inch sizes and more. Co. With its unique construction and precision engineering, it provides optimal performance and reliability. Air-Tite Bell-Mouth Takeoff with Damper by Southwark Metal Mfg. Get yours today! A bell-mouth inlet duct is extremely efficient and is used where there is little ram pressure available to force the air into the engine. 2. Find durable, galvanized steel fittings with balancing dampers for optimal airflow. Ducting Spacers Used to keep length of pipe separate whilst laid, ducting spacers clip onto lower pipe whilst the Shop our selection of industrial ductwork, ductwork accessories, performance components, and much more. When it comes to Bell Mouth Hood Clamp-Together Industrial Duct & Fittings, you can count on Grainger. Key Fea Maximise air intake or exhaust efficiency with the Bell Mouth, designed to reduce turbulence and ensure smooth airflow in your ductwork system. Shop high-quality bellmouth ventilation ducts for efficient HVAC systems. What is the difference between convergent and bell mouth ducts? Trunking Bell Mouth ATB-BM/PG Pre-Galv as standard – change suffix on partcode for alternative finish All lengths & fittings are IP4X compliant Single & multi-compartment solutions ATB - fast-fit turnbuckle lid fixing ASB – screwbush lid fixing ATP – tamperproof lid fixing Built-in earth knockout on fittings Metal Zinc’s Bellmouth Collar is used for medium and high pressure applications to aid in air distribution from square trunk line Hoods connect to the ends of duct and draw in smoke, dust, air, and other debris from specific areas or equipment. Cable will slide through the bellmouth section to protect the rim of the duct whilst keeping cable damage to a minimum. Circular Bell Mouths Ventilation Ducting | Fabricated Round Fittings | Circular Bell Mouths • Steel bell mouth inserted to ducts & secures with bolt. Browse the website for more details. A bell-mouth is a bell-shaped extension at the end of a pipe. What is Bellmouth pipe? Spiral Manufacturing Inc offers high-pressure spiral pipe and fittings and a line of pick-up hoods, floor sweeps, dust nozzles, and bellmouths. W/Gasket DS850-08 #BMD 8″ Bellmouth Galv. Bellmouth & Oval Spigots TDF / TDC Corners Duct Hardware & Accessories Duct Flange Systems Bellmouth & Oval Spigots Access Panels Flex Connector Products DOWNLOAD BROCHURE bell-mouth is a bell-shaped extension at the end of a pipe a suction bell-mouth. A bell-mouth may also be referred to as a suction bell-mouth. What is the purpose of a bell mouth? The primary purpose of a bellmouth is to ensure a smooth and efficient transition of air or fluid into a passage, minimizing energy losses and improving performance. Technical Brochure Description Additional Information Among various duct configurations, the bell mouth duct design stands out for its ability to minimize turbulence, reduce pressure loss, and facilitate smooth air transitions from fans or air inlets to duct networks. W/Gasket Hoods connect to the ends of duct and draw in smoke, dust, air, and other debris from specific areas or equipment. Router hoods capture dust and debris from a router table. Bellmouth entries are designed to have smooth inlet radius and can be used to attach a round duct or flexhose to a flat surface, good for certain dust collection applications. As you will find, the numerical value of the discharge coefficient is a considerable function of pressure ratio and, as many pipe end boundaries are A bell mouth includes an upstream body including an upstream-side opening formed to allow air introduced from an air supply duct to pass through and an upstream measurement portion connected with a differential-pressure acquisition device that uses pressure of the air in the upstream-side opening, in which the air supply duct guides the air into a water-heating device from the outside, a The bellmouth with roller fits directly into the duct and tightly secures into place with a bolt. A bell mouth is a tapered opening in a ventilation duct or a gas turbine engine inlet. Jf Part number 110BM. We make ductwork easy! The bell-mouth shape allows the maximum amount of air to be drawn into the duct with minimum loss. Bellmouth N/D Bellmouth W/D Bellmouth HD w/Super Standoff Bellmouth HD w/EE-126 A bellmouth that has been designed to fit directly into the duct and tightly secure into place with a bolt. The flared ends edge improves airflow maximizing particulate capture. ag7pgx, vzi0s, jsrrd, v2hwj, jkombi, o1nw, akh7ek, 1inc, l7hg, stslhd,