Manufacturer: KOKEN LTD.
Model: 12 D-Z

Supplies clean air into the mask through a hose

Supplied-Air Respiratory Protective Equipment

A supplied-air respirator (airline mask) is a system of respiratory protective equipment that supplies clean air to the wearer through a hose. There are types that use an air compressor or blower as an air source, and there are also types that rely on the wearer’s own lung suction power. By correctly selecting the appropriate type from various supplied-air respirators, the equipment can be used in:

• “Oxygen-deficient environments”
• “Environments generating high concentrations of toxic substances”
• “Environments generating highly toxic substances”

Please accurately assess the working environment and use a supplied-air respirator with the appropriate performance specifications.

Pressure Demand Type Airline Mask

Possesses high protection performance

The pressure demand type maintains positive pressure inside the mask. Even if there is a gap at the face-to-mask seal, air will blow out from inside the mask to the outside, making it difficult for outside air to enter.

The pressure demand type airline mask is structured to supply the necessary amount of air according to the breathing rhythm, while maintaining positive pressure (pressure higher than ambient air) inside the mask regardless of whether inhaling or exhaling. Therefore, in the worst-case scenario where a gap occurs between the mask and the face, air will blow out from inside the mask, helping to prevent the ingress of outside air and allowing for safer work.

Focus on safety Pressure Demand Type

Even if a gap appears in the face contact area, air will blow out forcefully from there, helping to prevent the ingress of oxygen-deficient air, toxic gases, and harmful dust.

● Air supplied by the pressure demand valve maintains a positive pressure state inside the mask thanks to a balance spring at the exhalation valve unit.

Examples of supplied-air respirator applications

A mask that easily and snugly fits the face

High Scope V mask with HAWC lip structure

The product utilizes “HAWC lip※” technology with a wide, flexible, and specially curved facepiece shape that creates a “suction cup effect” to enhance the seal. This provides high airtightness, a wide field of vision, and lightweight design.

※Abbreviation for High Adaptable Wide Concave (the company’s proprietary face contact structure).

The HAWC lip face contact area fits snugly to the face like a suction cup.

List of Types

For Sakai-type supplied-air respirators, please confirm the working environment, equipment, and number of users in advance to select the most suitable product for the workplace.

Compressed Air Supply (Using equipment such as an air compressor)

Airline Mask

The system is divided into 3 main groups:

1. Pressure Demand Type

• Features: Used for work in environments requiring high airtightness.
• Style: Facepiece Type.
• Example: Model 17HVG-ZW, etc.

2. Demand Type

Features: A type that supplies only the necessary amount of air to the wearer.

3. Constant Flow Type

Features: Used for continuous work over a long period within a fixed range.
Classification by style:

A. Facepiece Type

• Portable filter type: e.g., Model 12HV-Y, etc.
• Fixed filter type: e.g., Model 12D-Z, etc.

B. Hood Type

• Portable filter type: e.g., Model M5-Y, etc.
• Fixed filter type: e.g., Model S1-Z, etc.

C. Face Shield Type

• Fixed filter type: e.g., Model AFP-1.

Ambient Air Suction or Blowing

No air compressor required
Hose Mask

The system is divided into 2 main groups:

1. Electric Blower Type

• Features/Applications: Used for repairing plant equipment, working in manholes, pits, etc.
• Style: Facepiece Type.
• Example: Model SHV-105, etc.

2. Lung Power Suction Type

• Features/Applications: Used for tasks where a suitable breathing air source can be reached within a 10m range.
• Style: Facepiece Type.
• Example: Model 1 H-C, etc.

DANGER

• Half-face masks, hoods, face shields, and lung power suction types (both full and half-face) MUST NOT be used in cases of short-term exposure to toxic substances that are immediately dangerous to life or health.
• Individuals with beards, sideburns, or bangs that interfere with the face seal, or with mustaches or chin hair that hinder the operation of the exhalation valve, MUST NOT use facepiece-type supplied-air respirators.

Airline Mask – Constant Flow Type

Facepiece Type

Uses compressed air from an air compressor or air line system, cleaned through a filtration canister to provide breathing air for the user, allowing for work over long periods.

[Specifications]

• Minimum required air volume: 85 L/min
• Maximum hose length: 100 M.

DANGER

Oxygen-Deficient Environments:

• Absolutely DO NOT use half-masks or hoods in oxygen-deficient environments or where there is a risk of oxygen deficiency.
• Please use a full-face mask in such cases.

IDLH Environments: DO NOT use when the toxic substance concentration is at IDLH levels (Immediately Dangerous to Life and Health).
Air Source: Be sure to check the supplied air volume.

Sakai Type – Model 12 D-Z

Double coiled breathing tube type – Stationary filtration
Complies with JIS T 8153:2002 standard
Assigned Protection Factor: 50

The illustration shows a Type D half-face mask with a 2-tube coiled breathing configuration. In addition to the 2-tube version, a 1-tube version is also available. Furthermore, besides the Type D half-face mask, other options include:

• High Scope V full-face mask (wide field of vision).
• Type O full-face mask with two separate eyepieces.

Filtration Canister

Air pushed from a compressor can contain water, oil mist, etc., so proper cleaning is essential.

• Sakai Type Filtration Canister is an air cleaning device specialized for airline masks.
• Structure: Integrated with a high-performance micron filter and absorbent inside.
• Maintenance: Designed as a cartridge type for easy replacement.

The image above shows the version with a pressure gauge. The fixed filtration unit is sold separately.

Design focused on safety in every detail

Flow adjustment unit… Single-port cock
Applicable scope: Airline mask types
EXCEPT: 17 Series, Model NB-4, CM-1, PM-3, AFP-1.

1. Valve only rotates during adjustment

Utilizes a flow adjustment valve with a “Push-and-turn” mechanism.
Effect: Even if touched accidentally, the valve is very difficult to turn, preventing unintended changes in air flow.

2. Guaranteed air supply even when valve is fully closed

Effect: This high-safety structure ensures the air source is never completely cut off even if the user accidentally (human error) turns the valve to the full stop position.

3. Safety Valve

Mechanism: In the event that the coiled breathing tube is twisted or crushed in a confined space causing a blockage, excess air will be discharged through the safety valve.
Effect:

• Ensures the breathing tube does not burst in an emergency.
• The connection port is structured to allow the breathing tube to rotate, making the hose more resistant to twisting.

Mask / Coiled Breathing Tube Types and Model Names

	High Scope V Mask	HVT Mask	Type D Half-face Mask
1-tube system	※ HAWC Lip
Portable Filtering Type	Model 12 HV-Y 1-tube	Model 18 HVT-Y 1-tube	Model 12 D-Y 1-tube
Stationary Filtering Type	Model 12 HV-Z 1-tube	Model 18 HVT-Z 1-tube	Model 12 D-Z 1-tube
Electric Blower Hose Mask	SHV-105 1-tube	–	SD-105 1-tube
Lung Power Suction Hose Mask	Model 1 H-C 1-tube Model 1 H-B 1-tube	–	Model 1 D-C 1-tube Model 1 D-B 1-tube

	High Scope V Mask	HVT Mask	Type D Half-face Mask
2-tube system	※ HAWC Lip
Portable Filtering Type	Model 12 HV-Y 2-tube	Model 18 HVT-Y 2-tube	Model 12 D-Y 2-tube
Stationary Filtering Type	Model 12 HV-Z 2-tube	Model 18 HVT-Z 2-tube	Model 12 D-Z 2-tube
Electric Blower Hose Mask	SHV-105 2-tube	–	SD-105 2-tube
Lung Power Suction Hose Mask	Model 1 H-C 2-tube Model 1 H-B 2-tube	–	Model 1 D-C 2-tube Model 1 D-B 2-tube

• Equipped with a speech diaphragm. (Allows the wearer to communicate more easily without removing the mask).
• In place of the High Scope V mask, an Type O full-face mask with two eyepieces is also available as an alternative.
• For the Type D half-face mask, please use only in environments that do not cause eye irritation.