235674 — Miller PAPR II Foam Prefilter (Gen 2)

Fits these systems

Systems this part fits, with compatibility status and evidence
System	Compatibility status	Evidence
Miller Miller PAPR II (Gen 2)	T1 Officially approved	[01] www.millerwelds.com manufacturer manual OM-OTC-287373 Rev D (2024-07) Section 5-1 "Respirator Specifications" (p.13): "Standard Air Filter: PAPR-P2 Filter Assembly Consisting Of A Spark Guard Screen, Foam Prefilter, And Particulate (HEPA) Filter -All Part Of The NIOSH-Approved PAPR." Also Section 5-4 "Installing The Air Filter" (p.15) diagram labels "2 Foam Prefilter" and instructs "Install the screen, prefilter, and particulate filter in cover exactly as shown." Listed as item 3, part 235674, "Filter, Prefilter (Foam)," in Section 8 Parts List Figure 8-1 (p.26). Archived at sources/miller-o287373d_mil.pdf. 2026-07-06

Specifications

Technical specifications
Position in stack	Sits between the spark guard screen (235676) and the HEPA particulate filter (287170), inside filter cover 287175
Mandatory stack	"Do not use the respirator without the spark guard screen, foam prefilter, and particulate (HEPA) filter installed."
Replacement rule	Replace damaged or dirty filters. Do not wash, clean with compressed air, or reuse.

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Record sources

Evidence — dated sources

[01] www.millerwelds.com manufacturer manual OM-OTC-287373 Rev D (2024-07), Sections 5-1, 5-4, and 8 (pp.13, 15, 26). 2026-07-06