MSA P100 Vapor Flexi-Filters – High-Efficiency Respirator Filters for Advantage Series
The MSA Advantage 818343 P100/OV Flexi-Filters are low-profile respirator filter pads designed for compatible MSA Advantage respirators. These 2-pack Flexi-Filters provide P100 particulate filtration with nuisance-level organic vapor and ozone relief for industrial environments where workers need respiratory protection without bulky cartridge profiles.
The swept-back Flexi-Filter design helps improve field of vision and makes the filters easier to wear under welding helmets, face shields, and other PPE. Low breathing resistance supports comfort during long shifts, while finger tabs help workers install and remove filters without damaging the filter media.
With a P100 rating, these filters provide 99.97% minimum filtration efficiency against particulate aerosols when used as part of an approved respirator configuration. They are commonly used in welding, grinding, sanding, manufacturing, construction, maintenance, utilities, oil and gas, and hazard-abatement support work where a qualified safety program selects MSA Advantage respiratory protection.
Bulk Ordering & Procurement Support
Need MSA Advantage P100/OV Flexi-Filters for a welding crew, manufacturing plant, construction jobsite, municipal department, utility team, oil and gas operation, maintenance shop, or recurring respiratory protection program? ASA Supplies supports business, government, municipal, contractor, facility, and industrial purchasing teams with bulk quote support, volume pricing, purchase orders, and sourcing assistance.
Safety Note
These filters must be used only with compatible MSA Advantage respirators in an approved configuration. P100 filters protect against particulates, not oxygen deficiency or IDLH atmospheres. The OV/ozone feature is for nuisance-level relief and is not a substitute for approved organic vapor cartridges when vapor concentrations exceed applicable exposure limits. Respirator selection, fit testing, medical evaluation, training, changeout procedures, and use must follow OSHA 29 CFR 1910.134 and your EHS program.
Quick Buying Details
Brand: MSA
Series: Advantage Flexi-Filters
Part Number: 818343
ASA SKU: MSA818343
UPC: 641817011584
Product Type: P100/OV Flexi-Filter respirator pads
Filter Rating: P100 with nuisance organic vapor/ozone relief
Pack Size: 2 filters per package
Compatibility: MSA Advantage respirators
Design: Low-profile, swept-back flexible filter pads
NIOSH Rating: P100 particulate filtration as part of approved configurations
Best Use: Welding, grinding, sanding, construction, manufacturing, utilities, oil and gas, and industrial respiratory protection programs
Key Features
- MSA part 818343 P100/OV Flexi-Filters
- P100 particulate filtration for airborne dusts, fumes, and mists
- Nuisance-level organic vapor and ozone relief
- Low-profile design fits better under welding helmets and face shields
- Swept-back shape helps improve field of vision
- Low breathing resistance supports worker comfort
- Finger tabs support easier installation and removal
- Designed for compatible MSA Advantage respirators
- Sold as a 2-pack for respirator filter replacement programs
Common Uses & Applications
- Welding operations
- Grinding and sanding
- Metal fabrication
- Manufacturing maintenance
- Construction work
- Utility work
- Oil and gas maintenance
- Industrial plant work
- Lead or asbestos work, when selected by a qualified respiratory protection program
- PPE programs using MSA Advantage respirators
Buying Guide: MSA 818342 vs. 818343 vs. 818344
Choose MSA 818342 when workers need standard P100 particulate filtration only.
Choose MSA 818343 when workers need P100 particulate filtration plus nuisance-level organic vapor and ozone relief, such as some welding or industrial odor environments.
Choose MSA 818344 when the work calls for P100 filtration plus nuisance-level acid gas / HF relief.
Use approved MSA chemical cartridges or combination cartridges when the job involves gases or vapors above nuisance levels, specific chemical exposure limits, or required cartridge-level gas/vapor protection.
FAQ
What is MSA 818343?
MSA 818343 is an Advantage Flexi-Filter listed as P100/OV and sold as a 2-pack.
Is this the same as MSA 818342?
No. MSA 818342 is the plain P100 Flexi-Filter. MSA 818343 is the P100/OV version with nuisance organic vapor/ozone relief.
What does P100 mean?
P100 filters provide 99.97% minimum filtration efficiency against particulate aerosols when used as part of an approved respirator configuration.
Do these filters protect against organic vapors?
Only at nuisance levels. They should not replace approved organic vapor cartridges where organic vapor exposure exceeds regulatory limits or requires cartridge protection.
Are these filters compatible with all respirators?
No. They are designed for compatible MSA Advantage respirators. Do not use them with other brands or unapproved configurations.
How are they packaged?
They are sold as a pack of 2 filters.
