ULPA Dust Filter Box for Ventilators and Respirators

Jyntrel's ULPA dust filter box is a high-efficiency particulate and gas-phase filter element designed for ventilator and respirator breathing circuits, as well as high-specification fresh-air and oxygen-generation equipment. It captures PM0.3 particles at ≥99.99% efficiency and combines a PTFE membrane, glass-fibre media and composite activated carbon to address both particles and VOCs. It is intended for medical device manufacturers, OEM/ODM buyers and industrial respiratory protection suppliers who need a customisable, GMP-manufactured filter box. The brand is Jyntrel.

Operating Conditions and Airflow Path

In a ventilator circuit, the filter box sits between the patient and the device, so it sees warm, humid exhaled air on one pass and dry driving gas on the other. The airflow is cyclic rather than steady: peak inspiratory flow can rise sharply, then fall to near zero during expiration. The filter medium must therefore hold its efficiency across a wide velocity range without shedding fibres or increasing resistance beyond the device's compensation capability. Jyntrel's ULPA grade uses a PTFE microporous membrane laminated to glass-fibre support, which maintains particle capture as face velocity changes.

For industrial positive-pressure respirators, the air path is continuous and often dusty or laden with solvent vapour. Here the composite activated carbon layer adsorbs VOCs while the ULPA medium handles fine dust. The housing is moulded from medical-grade ABS or PC, and the seal is formed by ultrasonic welding with a medical silicone gasket, so the airflow path is closed and leak-free. Because the box is a dead-end filter, pressure drop rises as dust accumulates; the device's blower curve and the filter's resistance curve must be matched at the design stage.

Core Performance

The defining performance figure is particle removal: PM0.3 efficiency is ≥99.99%, with ULPA U15 and higher grades available. This is achieved by the combination of a high-precision PTFE membrane, top-grade glass fibre and composite activated carbon. The carbon layer extends the function from particle interception to gas-phase adsorption, targeting VOCs that pass through a purely mechanical filter.

Efficiency is verified in Jyntrel's CNAS-accredited laboratory, which can issue reports on filtration efficiency, dust-holding capacity and resistance. The product is manufactured under medical GMP, and the company holds IATF 16949, ISO 9001, ISO 14001 and ISO 45001 certifications. These system credentials support consistent production across batches, which matters when the filter is a critical component in a breathing circuit.

Selection and Customisation: the Data We Need

The filter box is fully customisable by drawing. Jyntrel moulds the housing to the customer's dimensions and interface geometry, selects the filter grade (ULPA U15 or above, with or without carbon), and can add logo, colour and packaging options. To propose a configuration, the engineering team needs the device or vehicle model, a dimensioned drawing or sample, the airflow or water flow (for this product, airflow), the operating conditions (temperature, humidity, dust loading, target gas), and the required quantity. With those inputs, Jyntrel can match the filter's resistance curve to the blower and confirm the seal interface.

Parameters

Typical Applications

The primary use is clinical ventilator and anaesthesia machine circuits, where the filter box protects both the patient and the device from cross-contamination. In industrial settings, the same core media is used in gas masks and positive-pressure respirators for dust and VOC protection. High-specification fresh-air purification and oxygen-generation equipment also use this grade where very fine particle removal is required. Because the housing and interface are customised, the filter can be designed into new devices as well as used as a replacement element for existing breathing systems.

Manufacturing and Testing at Jyntrel

Jyntrel operates multiple automated production lines with a monthly capacity of millions of pieces, which supports stable supply for volume OEM programmes.The company's own laboratory is CNAS-accredited and can issue filtration efficiency, dust-holding capacity and resistance reports. Quality control runs through IQC, IPQC and OQC, so incoming media, in-process welding and finished filter boxes are each checked. Jyntrel has been manufacturing filtration products for more than 20 years and has exported to Europe, the United States, Japan and South Korea for over 20 years. The company holds IATF 16949 (obtained in 2024), ISO 9001, ISO 14001 and ISO 45001 certifications, and products comply with REACH and RoHS requirements with documentation available. More than 1,000 filter solutions have been developed, and OEM/ODM support covers dimensions, structure, media grade, housing material, logo and packaging.

Share Your Operating Conditions

To receive a quotation and a proposed filter configuration, please tell us your device or vehicle model, the required size or drawing, the airflow, the operating conditions (temperature, humidity, dust and gas load) and the quantity. Our engineering team will respond with a solution matched to your air path. Contact Jyntrel to start the conversation.