3M white Tychem QC H-series hood assembly with hat shell & faceseal for respiratory protection systems in pharmaceutical areas


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

3M H-series hood assembly for respiratory protection. This type of facepiece has been design to cover one’s face, head and neck, and is recommended for workers in need of respiratory protection with headgear in pharmaceutical or industrial sector. This item is one-size-fits-all. 1 assembly/case.

This type of equipment offers a protection up to 1000 times the permissible exposure limit set by the CNESST or any other government regulation applicable.

The assembly includes:
- 2 Hoods (RH420)
- 2 Faceshield cover (RH110)
- 1 Hatshell (RW3258)
- 1 Head suspension (RW2878)
- 1 Chin strap (RH114)
- 1 Squeeze clamp (RW3222)

The RH422 facepiece consist of a premium hood that covers the head and neck. This kit is by design made to protect one from hostile environment filled with airborne contaminants. The hood is equipped with an elastic faceseal which molds itself to the shape of the user’s face. It also features a hat shell for workers who need an impact-resistant protection. The hard hat meets ANSI Z89.1-2003 impact protection standards and is classified type 1 and class G which is approved for industrial work. The hard hat is however not yet CSA approved. The facepiece consist of Tychem QC, a patented material by Dupont which is completely waterproof, alkali-resistant as well as resistant to some inorganic acids and pesticides.

3M manufacturer’s code: H-422

This piece of equipment gets its NIOSH homologation when assembled with the other components recognized by the manufacturer as part of a complete system. It offers a protection to up to 1000 times the permissive exposure limit to contaminants when properly used with a 3M GVP system.

This particular model of hood assembly can be replaced with 3M hood RS655 as long as the corresponding tube is assembled with it. Please contact our customer service for detailed information concerning the assemblage of your powered respiratory protection equipment.

Please note that the RH422 textile part of the hood is disposable, but the hard hat is reusable, thus maintenance is required. 3M recommends never washing the hard hat with any type of solvents since they can weaken some components which in turns can affect the efficiency of the equipment. As regards textile part, they are available in the menu at the bottom of the page (RH420).

Type of productSafety equipment
Main categoryPersonal protection
Sub categoryRespiratory protection
Sub sub categoryCleaning accessories
Name of the productHood set
Series of productsH series and V series
Product codeRH422
Approved/CertifiedMeets NIOSH
Country of originUnited State of America
ReusableReusable with prior hygienic measurement
Maintenance freeDiscard if damaged, contaminated, dirty or worn
Recommended use temperatureDo not expose to high temperatures
FeaturesEquipped with an ANSI safety helmet
Protection factorProtection factor of 1000
Faceseal membraneWith sealing collar
Facepiece typeHood + safety helmet and sealing collar assembly
Eye protectionEquipped with a protective eyepiece visor
Compatibility of the facial part3M ™ Power Air Purifying Respirator (PAPR) and Supplied Air (SA) respirator system
Visor tintTransparent
Material1Tychem (R)
Material2Copolyester (PETG)
Length (in/cm)12.79 in / 32.50 cm
Width (in/cm)11.18 in / 28.40 cm
Height (in/cm)9.41 in / 23.90 cm
Weight (lb/kg)2.01 lb/ 0.913 Kg
Sold byUnit
Another packaging available54 units per pallet
Return conditionsNo returnable if used. For more information about our return policy, please refer to the "Orders and Returns" link on the home page


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