---
title: "Pulse-jet baghouse"
description: "A pulse-jet baghouse is a fabric filter design in which each filter bag is cleaned by a brief, high-pressure pulse of compressed air directed downwards into the open top of the bag. The pulse momentarily reverses the gas flow through the bag wall, dislodges the dust cake, and lets it fall into the hopper. Pulse-jet is the dominant industrial baghouse design for new installations."
canonical_url: "https://sylio.co/glossary/pulse-jet-baghouse"
last_updated: "2026-06-28T02:29:25.073Z"
---

A **pulse-jet baghouse** is a [fabric filter](/glossary/fabric-filter) design in which each [filter bag](/glossary/filter-bag) is cleaned by a brief, high-pressure pulse of compressed air directed downwards into the open top of the bag. The pulse momentarily reverses the gas flow through the bag wall, dislodges the dust cake, and lets it fall into the hopper. Pulse-jet is the dominant industrial baghouse design for new installations.

## How a pulse-jet cycle runs

Solenoid valves on a manifold above the [tubesheet](/glossary/tubesheet) fire one row at a time, typically every 1–10 minutes during normal operation, more often when [differential pressure](/glossary/differential-pressure-baghouse) climbs. Pulse duration is 100–300 ms at 4–7 bar. The cleaning is *online*: the rest of the baghouse continues filtering during each pulse. See [pulse-jet cleaning cycle](/glossary/pulse-jet-cleaning-cycle).

## Where pulse-jet underperforms

Pulse-jet cleaning is highly effective on the bag surface directly under the venturi nozzle, but weaker on:

- Bag rows at the back of the compartment, furthest from the manifold
- The top and bottom inches of each bag where the pulse loses momentum
- Tubesheet area between rows where airborne dust resettles
- Compartment hoppers, which the pulse cannot reach at all

Adding [sonic horns](/glossary/sonic-horn) at the compartment roof and at the hopper wall closes these gaps, reducing total compressed-air consumption per kg of dust cleaned and extending bag life.

## Related terms

- [Baghouse](/glossary/baghouse)
- [Filter bag](/glossary/filter-bag)
- [Pulse-jet cleaning cycle](/glossary/pulse-jet-cleaning-cycle)
- [Differential pressure (baghouse)](/glossary/differential-pressure-baghouse)
- [Sonic horn](/glossary/sonic-horn)