Set includes a haft mask respirator, flexible hose and one nylon belt, one size fit most, sold individually. No. 9920


Return conditions : No returnable if used. For more information about our return policy, please refer to the "Orders and Returns" link on the home page

This set includes a haft mask respirator, a flexible supply hose and a nylon belt, one size fit most, sold individually. No. 9920. The set is intended for use with Allegro air-supplied breathing systems at low pressure, this product is approved by the US NIOSH TC-19C-353.

Manufacturer Allegro code: 9920.

Characteristic of the Haft mask respirator:
This respirator made of silicone rubber is hypoallergenic, resistant to chemicals and ozone. It is comfortable and offers a continuous flow of low pressure air. Silicone rubber is durable and maintains its shape during storage. This respirator is even used where the heat and cold are extreme.

The suspension has 2 durable rubber straps to keep the mask in place.

Exhalation valve:
Large diameter contoured exhalation valve design, for minimal breathing resistance. The valve is easily accessible to fast replacement and cleaning. The removable cover protects the exhalation valve against dirt, paint spray and frost.

Characteristic of the supply hose:
The feed hose is facing back to leave you a free field of view. It is light, flexible and resistant. The OBAC adapter can be removed quickly if needed. The hose has a large diameter which facilitates the maximum supply of air to the worker. The manufacturer did not provide information on the materials used to manufacture the hose.

Characteristic of the belt:
The nylon belt is worn at the waist. It has a plastic clip that prevents the feed hose from pulling on the face piece.

This haft mask respirator is one of the components that constitute a respiratory protection system call: low-pressure air supply. To be functional, it must be paired with a source of breathing air and a sufficient length of hose.

This type of respirator is recommended for work that will release solid and liquid particles into the air or for work in environments where there are contaminants and/or biological particles in the air. The air supply system is required when the worker is in the presence of a contaminant that cannot be filtered by cartridges or filters. It is particularly useful when there are no fumes that irritate the mucous membranes of the eye.

Do not use on a beard and other facial hair or if the user suffers from a condition that prevents him from having direct contact with the respirator’s sides.

This haft mask provides a protection factor of 1000 when used with other components of an approved respirator package. This face piece must be paired with other components that are part of the Allegro Respiratory System. It is essential to check the associated level of risk when using it. The manufacturer has designed its products for environments with contaminant concentrations that do not exceed the limit causing immediate death. Especially if the pump stops working. This haft mask offers a protection factor of up to 1000 times the exposure limit allowed by the CNESST or any other applicable government regulation. Do not use when sandblasting. This respirator must not be used in areas where there is a risk of oxygen deficiency.

Maintenance and service life:
This set is reusable provided its maintenance and storage are done according to the rules. Allegro recommends that you always inspect your mask before using it, clean it after using it, and keep it in its packaging when it is not in use. When cleaning, it is important not to use solvents since they can weaken some components of the mask, which can affect its effectiveness.

Also take care to have the usual spare parts such as: the exhalation valve (RA9920-03B). Please note that this item is available on special order only, the lead time may vary from 2 to 3 weeks. You can pair this haft mask with low pressure hoses (RA9100RA9100-50 and RA9100-100). In addition, the compatible air sources are (RA9806RA9821 or RA9832)

Type of productSafety equipment
Main categoryPersonal protection
Sub categoryRespiratory protection
Sub sub categoryAllegro low pressure air-supplied respirators
Name of the productHalf mask respirator, hose and belt kit
Product codeRA9920
Approved/CertifiedMeets NIOSH
ManufacturerAllegro industries
Country of originUnited State of America
Operating temperatureComfortable even in extreme heat and cold environments
Protection factorProtection factor of 1000
Eye protectionNo eye protection
Type of harness2 attachment points
Air supply systemLow pressure
Type of hoseCorrugated flexible and lightweight material for greater comfort ans less fatigue
Type of connectionOBAC quick-connect plug with wide diameter and minimal air restriction
Respirator / mask characteristicsEquipped with a contoured, large diameter exhalation valve that reduces breathing resistance for the worker
Respirator / mask sizesOne size fits all
Removable protectornew
Splash protectionDoes not protect against splashes
Visor coatingNo coating
WashableWash in warm water, 140°F/60°C with a mild soap (hand dish soap), rinse and disinfect with a Dakin solution (water with bleach), rinse thoroughly and let dry
Height (in/cm)10 in / 25.4 cm
Length (in/cm)21 in / 53.34 cm
Width (in/cm)11 in / 27.94 cm
Weight (lb/kg)3 lb / 1.4 Kg
Sold byUnit
Return conditionsNo returnable if used. For more information about our return policy, please refer to the "Orders and Returns" link on the home page

RA9920 Haft mask explosive view

RA9920 Allegro low pressure haft mask explosive view

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RA9920 Haft mask techical sheet

RA9920 Allegro low pressure haft mask technical sheet

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Set includes a haft mask respirator, flexible hose and one nylon belt, one size fit most, sold individually. No. 9920

Set includes a haft mask respirator, flexible hose and one nylon belt, one size fit most, sold individually. No. 9920


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