Description

Technical Parameters

The Single-Filter Silicone Respirator is a reusable half-mask facepiece incorporating a liquid silicone sealing flange, a single center-mount connection port, a downward exhalation valve, and a four-point adjustable head harness. The liquid silicone sealing boundary conforms to facial contours under varying clamping forces, maintaining edge contact during jaw movement. Operating with a single filter interface, this model reduces overall weight on the nasal bridge and balances center-of-gravity placement during prolonged wear in chemical handling, surface coating, and metal grinding operations.

Key Features

Liquid Silicone Sealing Flange: Hypoallergenic formulation resists skin oils and thermal hardening, maintaining boundary elasticity between -10°C and +55°C.

Central Bayonet Connector: Single-port interface streamlines filter replacement procedures and simplifies consumable inventory management.

Downward Exhalation Valve: Large-diameter silicone diaphragm channels exhaled moisture and warm air away from protective eyewear to minimize fogging.

Four-Point Adjustable Harness: Woven elastic straps with crown support distribute tension across the skull to prevent facepiece slipping.

Integrated Chin Pocket: Internal condensation gutter directs moisture away from the lower sealing edge during continuous operation.

Design & Components

Component	Material Specification	Functional Role
Face Seal Flange	Liquid Silicone Rubber (LSR)	Provides flexible, low-pressure facial contact and seals perimeter contours.
Rigid Inner Frame	High-Impact Polypropylene (PP)	Structural core securing the central cartridge port and valve seat housings.
Inhalation Valve	Molded Silicone Flapper	One-way intake mechanism preventing exhaled moisture from entering the filter cartridge.
Exhalation Valve	Low-Resistance Silicone Diaphragm	Opens under low exhalation pressure to discharge warm air and CO2 build-up.
Filter Mount Port	Standard Bayonet Lock	Twist-and-lock single connection for quick filter attachment and sealing integrity.
Head Harness	Elastic Woven Polyester + PE Crown	Four-point adjustable tension system with quick-release adjustment buckles.

Technical Specifications

Parameter	Specification	Test Standard / Reference
Facepiece Type	Reusable Half Mask Respirator	EN 140:1998
Primary Material	Liquid Silicone Rubber	ISO 10993 Biocompatibility
Mask Weight	125g ± 5g (excluding filter)	Calibrated Scale
Inhalation Resistance	≤ 20 Pa (at 30 L/min air flow)	EN 140 Section 6.8
Inhalation Resistance	≤ 80 Pa (at 95 L/min air flow)	EN 140 Section 6.8
Exhalation Resistance	≤ 140 Pa (at 160 L/min air flow)	EN 140 Section 6.9
Total Inward Leakage	< 2% of total inhaled volume	EN 140 Section 6.6
Thermal Operating Limits	-10°C to +55°C	Thermal Chamber Test Protocol
Shelf Life	5 Years in unopened original packaging	Accelerated Aging Protocol

Applications & Operational Boundaries

Applications

Surface Preparation & Spray Painting: Protection against organic vapors and paint overspray mist when equipped with Class A gas cartridges and particulate pre-filters.
Chemical Dispensing & Mixing: Shielding against liquid chemical vapors, resins, and solvents with appropriate chemical cartridges.
Metal Welding & Grinding: Filtration of airborne metal particulates, fumes, and grinding dust when fitted with Class P3 particulate filters.
Wood Processing & Construction: Dust filtration during timber sanding, masonry cutting, and silica-containing material handling.

Operational Boundaries

Not for use in environments where oxygen concentration is below 19.5% by volume.
Not for use in Immediately Dangerous to Life or Health (IDLH) atmospheres.
Not for protection against hazardous gases or vapors with poor warning properties (odorless or non-irritating).

Compatible Filters & Spare Parts

Item Category	Model / Spec	Protection Class	Target Airborne Contaminants
Chemical Cartridge	Organic Vapor Cartridge	Class A1 / A2 (EN 14387)	Organic gases and vapors with boiling point > 65°C
Particulate Filter	High-Efficiency Particle Filter	Class P3 R (EN 143)	Solid and liquid hazardous toxic aerosols and micro-dust
Combination Filter	Integrated Gas & Dust Filter	Class A1P3 / A2P3	Simultaneous protection against organic vapors and fine particulates
Replacement Part	Valve Diaphragm Set	Maintenance Accessory	Replacement silicone intake/exhalation valve diaphragms
Replacement Part	Harness Assembly	Maintenance Accessory	Replacement elastic head strap with plastic neck cradle

Use & Maintenance

Pre-Use Inspection Procedure
Examine the silicone facepiece body for mechanical damage, tears, or residue build-up around the sealing edge. Verify that the inhalation and exhalation valve diaphragms are clean, flat, and securely positioned on their valve seats without distortion.

Seal Check Procedure

Positive Pressure Seal Check: Cover the exhalation valve housing with the palm of the hand and exhale gently. The facepiece should inflate slightly without air escaping around the perimeter seal.
Negative Pressure Seal Check: Cover the filter connection port with the palm, inhale gently, and hold breath for 10 seconds. The mask facepiece should collapse slightly inward against the face without air leakage.

Cleaning & Storage

Remove all filter cartridges and spare components prior to washing.
Clean the silicone mask body in warm water with mild detergent (water temperature must not exceed 50°C).
Do not use aromatic solvents, gasoline, or strong acidic/alkaline cleaning agents.
Air-dry in a clean environment away from direct sunlight and radiant heat. Store in a sealed container or bag.

Our Certificates

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Supply & Packaging Specifications

Category	Operational Parameter
Minimum Order Quantity (MOQ)	1,000 units for standard product; 3,000 units for custom color matching or pad-printed branding
OEM Customization	Custom pad-printed logo on facepiece frame, custom user instruction manuals, private label inner box design
ODM Engineering	Custom connector interface engineering, custom valve cover housing, and headband cradle modification
Inner Packaging	1 mask unit per sealed bag and individual display box
Outer Packaging Specifications	20 individual boxes per master carton; Carton Dimensions: 58 cm × 38 cm × 42 cm
Shipping Weight	Gross Weight: 6.5 kg per master carton
Daily Production Output	15,000 silicone mask bodies per day / 50,000 filter cartridge units per day
Production Lead Time	15 to 20 days for standard orders; 30 to 35 days for custom OEM packaging orders

FAQ

Q: What are the primary differences between Liquid Silicone Rubber (LSR) and Thermoplastic Elastomers (TPE) in half-mask construction?

A: Liquid Silicone Rubber features higher thermal resistance and lower compression set compared to TPE. LSR maintains structural memory and perimeter elasticity within a temperature range of -10°C to +55°C without hardening over time. It demonstrates higher resistance to facial oils, perspiration, and repeated thermal washing cycles.

Q: What connection mechanism is integrated into this single-filter facepiece?

A: The standard configuration utilizes a central bayonet twist-lock fitting compatible with standard bayonet filter cartridges. Modified connection types (such as threaded ports) can be produced through custom mold tooling.

Q: What is the recommended cleaning method for the liquid silicone facepiece?

A: Detach filter cartridges before washing. Wash the facepiece in warm water with neutral detergent at temperatures below 50°C. Rinse thoroughly with clean water and dry at ambient room temperature. Isopropyl alcohol wipes can be used for surface wipe-downs between shifts.

Q: What factors determine the replacement schedule for the mask body and filters?

A: The liquid silicone facepiece body has an operational service life of 2 to 3 years depending on maintenance procedures and chemical exposure levels. Gas filter cartridges require replacement when the user detects organic vapor odor or taste inside the mask chamber. Particulate filters must be replaced when breathing resistance increases due to dust accumulation.

Q: What quality control documents accompany OEM production shipments?

A: Each bulk shipment includes Factory Inspection Certificates, Batch Certificate of Analysis (CoA), Material Compliance Sheets, and User Manual leaflets printed in specified target languages.

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