Manufacturer of silencer systems for steam and gases
behind safety, reducing and control valves
Heira Silencer GmbH was founded in January 2022; as the successor to Heiler GmbH, it draws upon over 20 years of expertise and experience in the field of noise control technology.
Working alongside experienced process engineers and selected suppliers, Heira Silencer GmbH serves as a reliable partner for projects of all sizes across Europe. Manufacturing continues to take place exclusively in Germany.
Ing.-Büro Heiler GmbH was founded in Paderborn in 2000 by Norbert Heiler (Dipl.-Ing.). Prior to founding Ing.-Büro Heiler GmbH, Mr. Heiler had spent 25 years serving as the Technical Managing Director of H. Servatius GmbH, one of Europe’s leading silencer manufacturers.
Capacity verification and fluid-dynamic analysis for industrial silencers
Are you planning to boost the output of your industrial plant and raise flow rates? When increasing capacity, existing silencers must be precisely evaluated against the new operating parameters to prevent damage and noise spikes.
As the official successor to Ing.-Büro Heiler GmbH, we hold the complete archive of all original design documents, calculations, and data sheets for your existing system. Based on this information, we perform computer-aided simulations and thermodynamic silencer recalculations.
We assess the exact technical limits of your existing silencer through flow analysis and structural integrity testing:
Maximum throughput capacity (mass flow): What is the maximum flow rate (steam or gas) the silencer can safely handle?
Thermodynamic backpressure analysis: What backpressure develops upstream of the silencer under increased load, and how does this affect the upstream valve?
Flow velocity assessment: Do flow velocities remain within critical limits to prevent extreme noise emissions or flow separation?
Structural integrity check: Can the existing mechanical components and material structure withstand the new, higher pressure and impulse forces over the long term?
You will receive a detailed technical report from us. This provides clear documentation on whether your existing Heiler silencer can handle the new flow rate or defines the exact limits of feasibility. This safeguards your investment and prevents unplanned operational downtime during the capacity upgrade.
For a quick assessment, simply email us your original Heiler order number (found on the nameplate) and your desired new parameters at info@heira-silencer.com, or use our inquiry form.
Blow-off and steam vent silencer for power plants and other industries
Valve exhaust lines are among the loudest components in power plants. They discharge steam or gas flows into the atmosphere, leading to turbulent flows and substantial noise levels. Our silencers effectively reduce these noises, improve the working environValve exhaust lines are among the loudest components in power plants. They discharge steam or gas flows into the atmosphere, leading to turbulent flows and substantial noise levels. Our silencers effectively reduce these noises, improve the working environment, and comply with legal noise control regulations. Blow-off silencers with or without pressure-reducing stages reduce the noise generated by steam lines. We manufacture custom blow-off silencers for power plant and system construction in carbon steel as well as stainless steel ment, and comply with legal noise control regulations. Blow-off silencers with or without pressure-reducing stages reduce the noise generated by steam lines. We manufacture custom blow-off silencers for power plant and system construction in carbon steel as well as stainless steel.
On the way to the atmosphere, the flow rate is reduced by special throttle or pressure-reducing stages. The medium flows through one or more perforated stages, the number and perforation of which are specially designed for each silencer. These stages reduce temperature and pressure, while absorbent materials further minimize sound energy depending on requirements.
Our silencers are characterized by their robustness, low weight, and maintenance-free operation. Accumulating condensate and rainwater are safely returned to the exhaust line via internal drainage systems. For optimal performance, proper drainage must be ensured at the lowest point behind the valve. Separate housing drainage is available upon request.
For the design of the silencers, please provide us with the following information:
Medium and mass flow. Gas or steam volume per hour
Pressure upstream of the valve
Temperature upstream of the valve
Permissible sound pressure level, e.g. 90 dB(A) at a distance of 1 m.
Diameter of the inlet pipe , if specified.
Details of the permissible back pressure
Details of optional add-on parts such as rain roof or ring, bird screen, weld-on flange, clamps for on-site installation of trace heating
Silencer systems
Valve blowout lines are among the most intense sources of noise in power plants.
When a steam or gas stream exits through a pipe downstream of a safety, reducing and control valve, a turbulent zone forms downstream of the outlet. The jet mixes with the surrounding still air. In addition to the pressure surges and turbulence within the valves, this is the cause of noise generation. In order to achieve small cross-sections of the discharge lines, the pressure upstream of the silencer should be selected as high as permissible (15-20% of the set pressure in the case of safety valves). The pressure reduction in critical expansion stages as well as changes in direction and velocity convert the sound energy into heat. The reaction forces that occur are compensated by radially arranged bores.
Heira silencers are particularly characterized by robustness, low weight and freedom from maintenance. Any condensate and rainwater produced is returned to the exhaust line via internal drainage systems. (Please ensure proper drainage at the lowest point behind the valve). We provide for separate housing drainage on request.
The silencers are blast derusted and protected against corrosion with subsequent high heat resistant ethyl zinc silicate coating. The top coating is applied with silicone-aluminum.
For higher sound requirements than are the norm today, an absorption stage is added downstream of the expansion section. For reasons of corrosion resistance and abrasion resistance, this consists of a stainless steel wire mesh. The medium to be discharged flows through this knitted pack, thus converting the sound energy into heat by friction and absorbing it. The arrangement is either radial or as a package in the outlet opening. Splitter silencers for pressureless systems can also be manufactured on request.
Blow-out silencer / Blow-off silencer
Blow-off silencers for steam and gases downstream of safety and control valves and expansion valves.
Blowers
Blowers for natural gas compressor stations.
Flash tank
Flash tanks are used to remove condensate from pipelines, to drain boiler drums and for blowdown. They relieve high pressures and allow separation into steam and residual condensate.
In atmospheric flash tanks, the steam is discharged via a vapor line and a silencer above the roof. Pressure flash tanks discharge the steam into a system for further use. Gravity flash tanks operate quietly and stand absolutely still, so that complex support structures are not required. To ensure proper separation, it is necessary to consider condensate drainage systems as a whole.
About us
Heira Silencer GmbH was founded in January 2022 and, as the successor to Heiler GmbH, has over 20 years of expertise and experience in the field of sound technology.
Together with experienced process technicians and engineers, as well as a number of selected suppliers, Heira Silencer GmbH is a reliable partner for small and large projects in Europe. Production continues to take place exclusively in Germany.
The production is carried out by cooperation partners from the apparatus engineering sector.
The increasing quality requirements for power plant components are constantly being met by innovative solutions. The cooperation partners have all the necessary approvals for the manufacture and testing of pressure vessels and pressure-retaining equipment in accordance with PED 2014/68/EU.
