P636070 Air Filter (PA5735 Equivalent): Built for Heavy-Duty Generator and Industrial Applications

A practical guide to the P636070 / PA5735 type disposable air cleaner. We explain its dimensions, airflow range, typical applications, and how Bowei builds an equivalent version for generators and industrial engines using HV filter paper, strong housings, and controlled production.

When people search for P636070 or PA5735, most results are simple catalog pages: a few dimensions, a price, maybe a basic cross reference.

But in real projects—whether you’re maintaining a generator room, an industrial compressor, or a small fleet of equipment—you care less about the part number itself and more about three questions:

Will this air filter match my airflow and mounting?
Will it survive dusty, real-world conditions?
Can I get a stable supply, not just one or two pieces?

This article looks at the P636070/PA5735 type air filter from a practical, factory point of view. We’ll explain what it is, how it’s used on heavy-duty engines, and how Bowei builds an equivalent unit that fits generator and industrial applications.

What Kind of Filter Is P636070 / PA5735?

Donaldson’s P636070 and Baldwin’s PA5735 are both disposable air cleaners with an integrated housing. Instead of a separate metal housing plus an inner element, the whole canister is changed as one piece.

ypical published specs are:

Outside diameter: 279–279.4 mm
Inlet diameter: 177–178 mm
Outlet diameter: 150 mm
Airflow range (Donaldson rating): roughly 1000–1400 cfm for heavy-duty diesel engines
Most online sellers focus on truck fitments such as Peterbilt models and Paccar engines.
But the same structure also works well in:
- containerized diesel generator sets,
- large industrial compressors and blowers,
- dust-prone fixed machinery.
At Bowei, we focus on this second group: generator and industrial users who need stable filtration rather than vehicle-by-VIN matching.

Why This Design Works Well on Generators and Industrial Equipment

A disposable housing design has a few clear advantages in fixed installations:

Fewer leak points
No separate cover, clamps, or inner cartridge means fewer places for unfiltered air to bypass the element.
Fast service
Maintenance teams can swap the whole unit quickly during a planned shutdown, then get the generator or compressor back online.
Predictable airflow
The housing and element are matched from the start, so the outlet size and internal flow path are more consistent than some “mix and match” housings.
Cleaner replacement
In dusty rooms, opening a traditional housing can let debris fall inside. With a sealed canister, you simply disconnect, remove, and install the new one.

Suppose you have already read our article on why diesel generator sets must use high-efficiency air filters. In that case, you will notice the same logic here: stable airflow and tight sealing always beat “just big enough” filtration.

Typical Applications—and How We Adapt It for Gensets

Online catalogs usually list P636070 / PA5735 for:

Peterbilt on-road trucks,
Paccar 400820023 cross,
Fleetguard AF25169, WIX 49173 and other equivalents.

On our side, we see customers using this same form factor in:

150–400 kW containerized diesel generator sets,
industrial diesel engines for pumps or compressors,
retrofits where the original housing is no longer available.

The key is: as long as the airflow requirement, inlet/outlet sizes, and mounting style match, we can build a Bowei equivalent in this size class and configure it for:

vertical or horizontal mounting,
side or end inlet,
different outlet positions for ducting.

If you also run large CAT 3512/3516 units, our separate guide on the three-filter set 1R0726 / 1R0756 / 8N6309 may help plan your engine-side filtration as well.

How Bowei Builds a P636070 / PA5735 Equivalent

We don’t just copy the shape. We focus on repeatable production and real-world service life.

1: Filter Media: HV Paper for Steady Airflow

We use HV composite filter paper with:

controlled pore size,
deep pleats,
good dust holding capacity.

Our pleating machines keep pleat depth and spacing consistent around the full circumference, which helps maintain stable restriction instead of sudden pressure spikes as the filter loads.

2: Housing and Mesh Strength

The outer and inner metal components are designed to stay rigid under:

high intake vacuum on cold starts,
vibration from generator or engine mounts.

Automatic welding keeps the seam clean and even, avoiding stress points that can crack over time.

3: Sealing and End Joints

For P636070-type units we use:

a fully sealed end cap structure,
controlled glue lines on critical joints,
100% visual inspection of every housing before packing.

This is similar to the way we handle larger generator filters, such as the models used on Cummins engines that we describe in our article on high-performance air filters for Cummins generator engines.

Is a P636070-Type Filter Right for Your Engine or Genset?

Before deciding to use a P636070 / PA5735 type filter, we suggest checking three points:

1: Airflow and Engine Size

Confirm the engine’s required airflow in cfm at rated speed. Donaldson rates P636070 around 999–1398 cfm.

If your engine’s requirement sits comfortably in this range (with some margin), the size class is likely suitable.

2: Mounting Layout

Check:

available space for the 11″ × ~15″ canister,
possible inlet and outlet directions,
support brackets for the housing weight.

We can adjust the mounting brackets on the Bowei version to match your frame or skid.

3: Service Access

Disposable housings are best when:

the operator prefers fast change-outs,
the generator room is tight,
you want to reduce the risk of incorrect inner element installation.

If you’re comparing multiple designs, our fast guide to choosing diesel engine air filters offers a simple framework for selection.

Replacement Intervals in Real Use

Paper ratings are useful, but what really matters is your environment.

For a P636070-type filter on a genset or industrial engine we typically see:

Clean indoor air (control room, data center):
check every 1000 hours, replace around 1500–2000 hours.
Standard industrial environment (workshop, plant room):
check every 500–750 hours, replace around 1000–1500 hours.
Dusty outdoor or mining environment:
check every 250–500 hours, and be prepared for earlier change-outs.

We recommend keeping a simple restriction gauge on the outlet and changing the filter when it reaches your set limit instead of waiting for the calendar alone.

Why Wholesalers and Generator OEMs Work with Bowei

Customers who use P636070/PA5735-type filters rarely buy just one or two pieces. They often:

maintain a mixed fleet of trucks and generators,
support rental power equipment,
supply regional service companies.

Working with Bowei gives you:

consistent quality based on HV media and controlled housing production,
batch traceability from raw material to finished filter,
flexible carton and pallet packing,
the option to customize labeling for your own brand, if needed.

And if your portfolio also covers large CAT generator filters, you can combine orders with our 3512/3516 filter sets and other generator-class elements to save on logistics.

Need a P636070 / PA5735 Equivalent for Your Application?

If you’re using P636070, PA5735, AF25169 or a similar number today and want a generator- or industrial-grade equivalent, we can:

check your engine data and airflow requirements,
confirm fit by drawing or sample,
prepare trial batches or full containers,
support long-term supply for distributors and fleets.

You can reach us at:

Email:[email protected]
Website:https://dieselairfiltration.com

We’ll keep the conversation practical—just like the filters we make.

P636070 Air Filter (PA5735 Equivalent): Built for Heavy-Duty Generator and Industrial Applications

What Kind of Filter Is P636070 / PA5735?

Why This Design Works Well on Generators and Industrial Equipment

Typical Applications—and How We Adapt It for Gensets

How Bowei Builds a P636070 / PA5735 Equivalent