Ultrapure Chemicals

Graver Technologies provides high performance filtration technology to meet the requirements for ultrapure chemicals.

High Performance Filter Technology for Ultrapure Chemicals

The manufacture of very small electronic components, referred to as semiconductors, includes devices such as transistors, capacitors, resistors, diodes, LED and photocells. The different types of devices can be integrated together to form integrated circuits, or VLSI (Very Large Scale Integration) devices such as microprocessors and random access memory (RAM). The high purity processes require the use of equally high purity chemicals stripping, etching, buffering and rinsing. These processes utilize solvent-based or aqueos based chemicals and chemical mixtures, all of which must filter to nanometer levels to ensure minimal defects and result in high yield. Many of these processes may require temperature in excess of 150C which will limit the processes to materials composed only of fluoropolymers such as PFA and PTFE.

view Literature

Optional Added Content

Optional Added ContentLorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse varius enim in eros elementum tristique. Duis cursus, mi quis viverra ornare, eros dolor interdum nulla, ut commodo diam libero vitae erat. Aenean faucibus nibh et justo cursus id rutrum lorem imperdiet. Nunc ut sem vitae risus tristique posuere.

About Graver's Filters For Ultrapure Chemicals

Fluoropolymer membrane and all-fluoropolymer construction to meet the chemical compatibility requirements for solvent-based strippers, Piranha and aggressive acid-based products.
Manufactured, flushed with 18 MΩ-cm DI water, tested and packaged in an ISO Class 7 Cleanroom Environment to ensure low extractables and low particle shedding
PES membrane for aqueous based acids, offering superior flow characteristics, high contaminant capacity and consistent removal of submicron particles.

Product Selection

ZTEC™ E - For critical particle control down to 0.03 micron for aqueous chemicals
TefTEC™ - Hydrophobic PTFE membrane for more aggressive chemical applications
Citadel® - All-fluoropolymer filter for the most critical and aggressive chemical applications
QMA – High-efficiency, hydrophilic membrane for reliable particle control in ultrapure chemical applications.

Frequenty Asked Questions

How often should gas turbine filters be replaced?

This depends on the environment and filter type; however, pre-filters are changed every 3–6 months, while final filters may bechanged once in a year or two. Monitoring pressure drop is key to determiningreplacement timing.

What factors affect the operating life of a gas turbine filter?

Here are some factors:

Ambient dustand pollution levels
Operatinghours and load
Pulse-cleaningfrequency, depending on the type
Humidity andmoisture
Filter mediaand design

How do I know when a filter needs to be changed?

Differential pressure across the filter is animportant aspect in this case. If it increases beyond the set threshold, thefilter may be clogged or need cleaning or replacement.

What is pressure drop and why does it matter?

Pressure drop is the resistance to airflow through afilter. A high-pressure drop reduces turbine efficiency and increases energycosts. Selecting low-resistance filters helps improve performance.