Bachmann Industries India Limited Sector 6, Faridabad, Haryana

A vent silencer, also known as safety valve & blow down silencer, is basically designed to meet the expanded flow requirements of steam & other high pressure gas venting systems. Vent silencers find wide applications in high pressure vents, steam vents, safety relief valve outlets, steam blow downs & purge outlets, etc   Features Fibre glass cloth protected infill Replaceable infill on many units Available for high temperature applications Rain Caps available if required Other treatments, including hot dip galvanizing, are available on request  

STACK TRANSITION is a square to round transition piece comprising an internally-insulated carbon steel shell. All transitions, The from square to rectangular or round to round configurations, are all are designed as per requirement. Externally-insulated, stainless steel constructions are also possible.   STACKS, either self-supporting or with a four pillar external support-structure, for GT and HRSG applications are designed to the relevant international codes. Their modular design, insulated or bare, enables easy site erection with minimum down-time. Unique support structure designs using pipe sections Internally insulated shell Shell profiles are straight or square to round transitions Unique peripheral air gap insulation minimizes the lining material requirement and overall loads

Stack Cap Damper are typically employed to encapsulate adequate heat to ensure efficient start & working of the boiler. BACHMANN employs a unique coupling and counter-weight mechanism to make the design efficient and 100% independent of external drives, thus eliminating the possibility of dangerous pressure build-up in the system. They are self-opening at set pressure, and self-closing on reduction of pressure below specified, with quick open/shut-off feature.

These heavy duty constructions are extensively used in material handling application. They isolate or divert solid materials such as clinker dust and coal ash.   Typically lined with or fabricated out of abrasion resistant steels. Liner plates can be installed with replacability feature. Electric Drive or manual operation is typical For very close tolerances, fully machined blades enable 100% cross blade isolation, even under heavy loads

Turnkey Duct system components supply includes Silencers, Stacks, Support structures and Ductwork (including square to round transitions). Duct SILENCERS are designed to achieve permissible near field / far field noise level with a touch-safe outside skin temperature while maintaining adequate strength to support Stack loads. The typical GE frame-6 silencer attenuates the gas turbine exhaust by-pass stack noise level to within 85dbA at 1 metre from the system perimeter   DUCTINGS, are available in a full range from simple carbon steel to high temperature alloy and stainless steel constructions. With a carbon steel outer frame the internally insulated ducts are typically clad with St/Steel 409 (or other st/steel materials) liner plates over a ceramic or mineral wool lining held together with a specially machined pin & washer arrangement. Externally insulated ducts require special attention to prevent thermal stress cracking.

BACHMANN Poppet dampers are equipped with a Duplex “Leaf-seal type” arrangement ensuring 99.9% isolation even without a Seal Air system, Optionaly provided with internal heating arrangement to prevent build-up of sticky flow media, Quick shutopen feature is available on demand.

Advantages Seats : Seats are made of a high Nickel alloy which enable ‘self-cleaning’ Blades : The Blades are of an ‘Airfoil Configuration’ which allow a minimum pressure drop without affecting performance Components : These are individually removable and are easy to maintain Drives : It enables quick Actuation and is available in all modes – Electric, Pneumatic, Hydraulic, Manual Design : These are designed as heavy duty and abrasion-resistant   The TANDEM LOUVER DAMPER has an open cross-flow profile that creates very low pressure drop when fully open. 100% isolation is ensured by injecting pressurized air through a top or side mounted seal air fan & valve system

The GSV damper design for achieving 100% cross–blade gas isolation without employing seal–air fan system is the original proprietory design of our partners – the erstwhile Metroflex, UK. Very popular in application such as ESP inlet and outlet, it features a unique dual bulb-sealing system and an open bonnet.   Operates successfully even under condition of heavy accumulation of dry dust. In closed condition, it achieves 100% leak tightness across blade, ensuring completely safe isolation of the downstream duct. In the unlikely event that seals should need replacement, it is simply done from the outside & access is not required to the duct interior.  Orientation freedom – available for blade entry from top, bottom, side or inclined. Drive options include Rack & pinion drive or the conventional screw rod.  

BACHMANN India is a specialist supplier of state-of-the-art three-way diverters used for controlling Gas Turbine exhaust flow – either to the Bypass Stack or to the downstream HRSG. The latest generation of BACHMANN GFD is an integration of the best features of the original Bachmann (USA)and Metroflex (UK) designs – the pioneers in this field. Diverters are available in both toggle drive and pivot drive options, covering the complete range: from boxes of small 1M sq. opening to the huge 7M sq. Frame-9FA size. Custom design options can accommodate a variety of aspect ratios, electric or hydraulic drive, circular or conical inlet, and internal or external insulation configuration with quick shut features.

BACHMANN in association with Wahlco Group of USA has pioneered the supply and installation of Flue gas Conditioning systems in India. It allows coal fired boilers to burn a wider variety of coals, including low cost high ash content coals and low sulfur coals while avoiding the cost of scrubber installations – all without affecting the performance of the fly ash particulate collectors (Electrostatic Precipitators). Key Features: Flue Gas Conditioning is a revolutionary technology to enhance ESP collector efficiency to levels consistent with the firing of high sulfur coals. Flue Gas Conditioning skids designed in association with Wahlco, Inc. (USA) reduces the resistivity of fly-ash, thus improving collector efficiency, especially for high-sulfur and high-ash coals common in India

All moving parts are located inside the duct geometry. This eliminates gas leakage to atmosphere. Flap dampers weigh less than the louver damper thus reducing duct load. Unlike guillotine dampers, they do not induce wind loads into the duct system. All internals are continuously heated by the gas flow creating a negligible hot/cold interface. Thus, there is very little damage due to corrosion from dew point condensation. Only the drive shaft extends out of the duct to allow easy external maintenance to drive bearing & the actuator system.   Unique metallic flexible sealing system that compensates for thermal growth, deflection under pressure & debris deposits from flue gas. 100 % isolation is achievable with seal air system. Quick shut/open feature available on demand. Since no large components extend outside the duct, flap damper can be installed in constricted areas, such as stacked duct system.  

The BACHMANN Panel Filter Houses provide efficient filtration of air for Gas Turbines and Diesel Engines. Comprehensive filter product range is capable of meeting all requirements, up to the maximum levels of separation efficiency.   PULSE-JET filterhouses comprised of banks of cartidge filters are ‘self-cleaned’ by means of sequential reverse-flow pulses of compressed air. Cartridges are available to suit all environments, and efficiencies in excess of 99% can be achieved. Evaporative Cooling Systems, lead to lead to increased power output and an improved gas turbine heat rate, particularly in warm and dry climates

BACHMANN India supplies a complete range of non-metallic expansion joints for applications ranging from low-temperature thermal plants, and high-dust cement mills to high-temperature steel plants. Backed by technical support of Bachmann USA (a founder member of EJMA), BACHMANN has developed multiple ranges of fabric expansion joints consisting of: a)      “Elastoflex” Expansion Joints – Single membrane expansion joints for low temperatures. b)      “Ultraflex” Expansion Joints – High temperature range expansion joints for the utility industry. c)      “Ductflex” Expansion Joints – Heavy duty non-metallic joints for temperature upto 1400 deg.C d)       Gas Turbine Expansion Joints – Patented designs for GT application e)       Special Gaskets – for high temperatures and GT applications. f)        Pipe-penetration Joints   Designed for typical operating temperatures of 100°C to 1180°C Totally integral design requiring no cladding/ welding at site Light weight, easy field- spliced and repaired Capable to withstand the system loads for heavy duty operations and long life Dome Seal allows the insulating materials to fully expand after compression – eliminating “hot spots” on the fabric belt Can handle both lateral and axial movements with very low spring force Totally integral design requiring no cladding/ welding at site Same thermal growth coefficients for adjacent components eliminate the potential for damaging stress

Butterfly Dampers are round louver dampers that facilitate both isolation and modulation. They find wide application in industrial ductings used for gas cleaning and process equipment.   hey support a variety of Seals and options of Drives – Manual, Pneumatic, Hydraulic, and Electro mechanical for quick Actuation. Optional quick-shut/open feature and self-closing with counter-weight arrangement Sustainable in the full temperature range Available in sizes ranging from 6 ft. to 20 ft. in diameter Allow easy maintenance of the externally mounted drive bearing & actuator system. Unique shaft-sealing arrangement ensures zero leakage by a non-asbestos gland packing arrangement They are easy in installation and seat tightly

BACHMANN India has launched, for the first time in India, Acoustic Enclosures with a modular inter-locking Panel System. It boasts of the industry-minimum down-time for doing rapid installation and dismantling. It also provides inter-changeability due to its standardized panel geometry.   In a tie-up with NAP Acoustic South-East Asia Pvt. Ltd., the unique SOUND SNAP panel system is now indigenously available. Following many years of development, the SOUND SNAP system has found wide application in hundreds of installations. It has a proven track record for the complete range of noise control products of NAP SILENTFLO, all of which are tested at NATA registered independent laboratories. The range of supply applications consist of:   1 Modular Acoustic Enclosures 2 Transportation Noise Barriers 3 Gas Turbine Intake and Exhaust Silencers 4 Diesel Engine Exhaust Silencers 5 Steam Vent Silencers 6 Air-conditioning silencers 7 Acoustic Doors and Louvers