Today’s engines must breathe easily and ingest virtually no contamination to comply with strict emissions standards that protect our environment. H&V’s engine intake media sets the pace for the world’s leading filter manufacturers by offering low restriction and exceptional dust-holding capacity to safeguard the air we breathe.
- Our patented NANOWEB® media offers 300% higher soot-capture efficiency and low filter restriction. Flame retardant NANOWEB makes it easier to design the innovative filter geometries that new engine technologies require.
Renewable energy sources only generate power when the sun shines or the wind blows. Optimizing green energy production into the daily grid cycle requires bulk energy storage. New load-leveling installations are accompanying renewable energy plants across the globe. Today, maintenance-free valve-regulated lead-acid (VRLA) batteries with premium H&V separators are the leading electro-chemical storage solution worldwide.
- H&V’s separators are installed in multiple large energy storage projects around the world.
- Our battery separators feature more than 94% porosity for maximum acid storage.
Telecommunications and Uninterruptible Power Supply (UPS) batteries provide energy back-up in the event of a power failure for critical applications, including computing, data storage, and sensitive manufacturing processes. For more than thirty years, H&V’s UPS and Telecommunications battery separators have been the first choice for long-life back-up power requirements. Our separators are optimized for heat, float, high-rate, and cycling.
- Our battery separators feature more than 94% porosity for maximum acid storage.
- We offer customized weight and thickness for peak performance in your design.
The automotive industry rapidly developed start-stop engines to reduce carbon emissions and provide more efficient fuel consumption. This innovative system turns off the car’s engine in situations where the vehicle would otherwise idle, such as stopping at traffic lights. Start-stop systems utilize sensors to detect when the vehicle is stationary. Some models will automatically shut off the engine when the vehicle’s speed falls below a specific threshold.
Start-stop systems are available with most vehicle classes, including motorcycles, to improve fuel efficiency and lower engine emissions. While these systems are highly advantageous in numerous ways, they do pose significant challenges for automotive batteries. Repeated starts and stops place a high demand on a vehicle battery because the vehicle is still in use. As the engine switches off, the battery must take on the burden of powering any electrical components that continue running. As a result, start-stop automotive systems often cause charge management and charge acceptance issues with vehicle batteries.
Hollingsworth & Vose (H&V) is a leading supplier of battery separators designed to improve battery function in start-stop systems.
Battery Separators for Automotive Start-Stop Engines
H&V Absorption Glass Mat (AGM) separators have become the dominant choice for automotive Starting, Lighting, Ignition (SLI) batteries used in start-stop vehicles. Our AGM separators facilitate high-speed assembly to meet the complex production demands of the start-stop vehicle market. We specifically design our separators to account for increased service demands such as rapid recharge, cycling, and acid stratification.
Accommodating these demands requires a wettable and porous battery separator that will allow acid to permeate it as the battery is charging or discharging. Additionally, the separator should never impede the flow of ions between the cathode and the anode.
Due to the acidic, oxidative environment of the battery, manufacturers must opt for materials that resist these stressors. Start-stop engine battery separators must also be durable enough to handle assembly operations and function reliably under the intense vibration and thermal stress they will encounter over the battery’s service life.
Additionally, consider the way that the separator will interact with the acid contained within the battery. Since the acid serves as the fuel or reserve capacity for the battery, manufacturers must design the battery separator to displace a minimal amount of acid. Incorporating this design feature will ensure optimal battery performance.
Our battery separators offer numerous benefits for start-stop systems, including:
- High-rate discharge performance
- Cycling optimization
- Compression maintenance (recovery)
- Electrolyte stratification resistance
- Reserve capacity optimization
- High-porosity for maximum electrolyte volume
- High-vibration resistance
- Chemical purity and consistency
- Thickness and basis-weight control
- Electrolyte-filling efficiency
- Wrapping/stacking efficiency
- Assembly defect reduction (rips, splits, tears, and punctures)
- Paste imperfection protection (paste lumps, spurs, etc.)
All-Glass and EnergyGuard® from H&V
At H&V, we manufacture all of our battery separators at a global network of regionally located mills, enabling us to offer rapid delivery times and localized application support. Our EnergyGuard® high-strength battery separator provides an ideal solution for start-stop systems, featuring an exceptionally robust construction that guards against vibration and assembly defects. Alternatively, our all-glass product line is also popular for this application.
To see how our battery separator solutions can help improve your start-stop system, please contact us today.
Water, sludge, soot, acids, and temperatures above 150o C— these are the harsh conditions that oil filtration media are designed to meet. In this aggressive environment, media needs to consistently remove contaminants down to 8 microns or lower, while remaining durable over extended service intervals.
- H&V oil filter media, rated at both 50% and 95% particle efficiencies, meets a broad global range of particulate removal requirements to support your demands on six continents.
- Our Advanced Cure Resin (ACR) oil filter media can reduce your production line footprint by up to 50%, eliminate 99% of your environmental gas emissions, and lower your energy bills.
In hydraulic applications, filter failure is not an option. H&V delivers the industry’s highest performance media. Our gradient density-designed hydraulic filter media features excellent particle removal efficiency and the lowest pressure drop. It minimizes overall system energy requirements, improves reliability, and lengthens the life of machinery.
- Our hydraulic media are designed to remove up to 99.5% of particles >5 microns, and our dual-phase provides 100% more dust-loading capacity to extend filter change intervals.
- H&V hydraulic filtration media also offers lower flow restriction while maintaining current levels of filter efficiency and dust-holding capacity.
Indoor air pollution is considered one of the top environmental health risks. HVAC air filters remove dust and other particles to ensure HVAC systems perform at peak efficiency and deliver quality indoor air. H&V offers a variety of highly engineered media that meet or exceed different global standards and offer lower pressure drop, energy savings, and longer media life.
- Our HVAC filter media, glass or 100% synthetic, achieve the desirable combination of high filtration efficiency with low pressure drop.
- Our patented NanoWave® HVAC pocket media provide superior dust-holding capacity compared to traditional
synthetic media and glass mat.
Gas turbine filtration and dust collection systems operate in the most challenging environments imaginable. They require high service intervals and durability against airborne contaminants found in adverse conditions throughout the world. H&V offers the broadest range of pulse-cleaned and static high-performance filter media that set the standard for efficiency and extended life in the toughest environments.
- Patented NANOWEB® media offers 500% higher service intervals for pulsed cartridge applications compared to non-fine fiber treated media. Our media offers the ability to fine-tune filter change intervals to match up to your other maintenance timelines.
- Our market-leading corrugation capabilities (> 20 mils) offer superior dust-holding capacity for lower-cost, higher-service interval filter designs.
The newest diesel engine systems require cutting-edge filtration technology to meet strict government emission and fuel efficiency limits. OEMs increasingly demand longer service intervals and reduced warranty claims. Consumers are turning to more efficient engines to lower fuel consumption, saving money and reducing emissions. As the leading supplier of fuel filtration media, H&V provides solutions for the greatest fuel filtration challenges.
- H&V’s fuel filtration media provides long lasting filtration efficiency of up to 99.9% for particles at and above 4 microns, resulting in longer filter element replacement intervals.
- New glass-free H&V media addresses the growing number of water separation challenges due to increased use of bio-fuels and lower IFT (interfacial tension). Our media meets the >95% ISO and SAE separation requirements.
H&V designs and manufactures both glass containing and glass free fuel media, including full synthetic options. Our product line covers fuel applications globally in a wide variety of efficiencies, dust holding capacities (lifetime), and water separation options.
A cleanroom is a controlled environment used for highly sensitive manufacturing and production operations. The level of cleanliness in a cleanroom is defined by the allowable concentration of airborne particles, with other environmental parameters (e.g. temperature, air pressure, and humidity) controlled as necessary for any given process. Achieving and maintaining the level of cleanliness needed for these sensitive applications necessitates the use of innovative particulate filtration technology (HEPA and ULPA). In addition to airborne particles, airborne molecular contamination is an increasingly important driver of process performance, requiring molecular or gas phase filtration media.
For advanced materials, you can trust in your most critical filtration applications, turn to the experts at Hollingsworth & Vose (H&V). We manufacture highly engineered HEPA and ULPA particulate filter media as well as molecular filter media (MFM). H&V’s materials help control contamination, ensuring process integrity and optimizing process yields. H&V’s differentiated solutions reducing the energy consumption of cleanroom filtration systems, a significant portion of overall cleanroom costs. All of our filtration products are designed and constructed to meet the most stringent requirements of all relevant international standards.
The Role of Filtration Systems in Cleanrooms
The filtration system is the critical component in any cleanroom, as it keeps the cleanroom free of contaminants that threaten the quality, safety, and yield of the process being protected. A cleanroom filtration system uses multiple filters to remove and collect particles from incoming air. The flow of air in a cleanroom is carefully engineered to facilitate the control of airborne contamination by ensuring air moves in a single direction (laminar or unidirectional). This airflow design minimizes the risk of contaminants traveling through and landing inside of the cleanroom rather than getting processed by the filters.
HEPA Filters for Cleanrooms
HEPA filters are one of the most commonly used types of cleanroom filters. They can filter out 99.99% of all particles that are 0.3 µm or bigger, which enables them to capture and collect many of the contaminants from the air going into a cleanroom.
What Role Do HEPA and ULPA Filters Play in Cleanroom Settings?
In cleanrooms, an HVAC system first heats or cools and humidifies or dehumidifies the incoming air as needed. It then passes the air through a series of terminal HEPA or ULPA filters, which remove any microscopic particles that it might be carrying. This comprehensive process ensures the air is appropriate for the operations performed within the cleanroom, including temperature, moisture, and contaminant levels.
How Do HEPA Filters Work?
HEPA filters capture and collect airborne particulates through the use of a complex fiber web. The web traps contaminants by sieving, interception, diffusion, or inertial impaction, depending on the particulate’s size. Small-sized particles dissipate as they travel through the web until they collide with and become trapped by a fiber. Medium-sized particles are trapped through interception. Large-sized particles are trapped through inertial impaction and sieving.
Configuration of Cleanroom Filters
The filter product configurations used to depend on the requirements and restrictions of the particular application. They can include filter panels, compact filters, and deep-pleat filters. These products are processed using a variety of techniques, such as knife pleating, deep pleating using aluminum separators, and rotary mini-pleating. H&V has significant experience working with all major manufacturers of pleating equipment and can advise customers on best practices for any given application.
Types of Cleanroom HEPA Filters
Cleanroom HEPA filters come in many designs and configurations to suit different filtration applications. The most common include:
- Fan-powered HEPA filters. These filters are highly flexible and easy to install. Standard ones offer variable speed control and feature power indicator lights.
- Terminal diffusers. These filters are designed to be hung from tee-bar ceilings to encourage unidirectional airflow.
- Low-profiled HEPA filters. These filters are ideal for applications where a standard-sized filter would be difficult or impossible to install.
HEPA Filters for Cleanrooms by H&V
At H&V, all of our high-efficiency cleanroom filters are constructed with low boron content and engineered for superior performance (high strength, low pressure drop). Our product selection includes:
- Standard glass media: suitable for mini-pleat, deep-pleat, and compact filter processing
- Perform glass media: offers superior processing characteristics and a 10% to 16% lower pressure drop compared to competitive media with the same efficiency
- Molecular filtration media (MFM): addresses airborne molecular contamination, which can threaten process yields in many cleanroom applications
We’ve also created laminated structures that combine different technologies to enhance specific performance characteristics. To learn more about our filtration media products and how they can benefit your cleanroom application, contact us today.