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Fire Extinguisher Pressure Gauges

-- Steady & Reliable Manufacturer --

Introduction: Visual Verification of Extinguisher Readiness

Fire Extinguisher Pressure Gauges are essential safety accessories that provide a quick, visual indication of the internal pressure within a stored-pressure fire extinguisher (e.g., ABC dry chemical, water, or foam). The gauge measures the nitrogen or air propellant pressure required to successfully expel the extinguishing agent.

These gauges are specialized, using a Bourdon Tube or diaphragm mechanism to translate pressure into a needle position. They are universally marked with three zones: Red (Overcharged or Empty), Green (Ready/Optimal Pressure), and Red (Empty). The needle must rest precisely in the green zone for the extinguisher to be considered operable and compliant with NFPA 10 requirements.

Gauges are typically rated for the extinguisher's maximum working pressure (e.g., 100 psi to 250 psi) and must be highly durable, resisting vibration, temperature extremes, and corrosion. They are installed directly onto the extinguisher valve body via a small threaded port (1/8 inch NPT). (Approx. 520 words)

Advantage: Instant Readiness Check, Cost-Effective, and Mandated

  • Visual Verification: Allows users and inspectors to instantly confirm the unit is properly charged simply by looking at the green zone.
  • NFPA 10 Mandate: Required by fire codes on all stored-pressure extinguishers to ensure reliability in an emergency.
  • High Durability: Robust brass/steel casings and polycarbonate lenses protect the sensitive internal mechanism from physical shock and environmental damage.
  • Temperature Compensation: Designed to maintain relative accuracy across a standard operating temperature range (e.g., −40∘C to 60∘C).
  • Simple Interface: The color-coded face (Red/Green/Red) eliminates complexity, making the operational status clear to all users.
  • Tamper Detection: A sudden drop in pressure (needle in red zone) alerts personnel to possible tampering, slow leaks, or prior discharge.

Specification: Mechanism, Range, and Accuracy

Gauge TypeBourdon Tube or Diaphragm Pressure Gauge
Working Pressure Range0 to 250 psi (Common), 0 to 500 psi (High Range)
Scale MarkingRed (High), Green (Ready), Red (Low/Empty)
Accuracy±3% of Full Scale (Typical)
Connection Size1/8 inch NPT/BSP (Standard)
Case MaterialBrass or Chrome-Plated Steel, Acrylic/Polycarbonate Lens
Standard ComplianceNFPA 10 (Maintenance), UL/FM Recognition
Internal GasNot Applicable (Measures Propellant Gas: Nitrogen/Air)

Monitoring Stored-Pressure Extinguishers

ABC Dry Chemical Units

The most common application, providing continuous monitoring of the 195 psi (∼13.5 bar) nitrogen charge.

Water and Foam Extinguishers

Monitoring the lower pressure propellant required for aqueous agents, ensuring correct spray distance and duration.

Fire Safety Inspections

Used during monthly occupant checks and annual professional inspections (NFPA 10) to confirm the unit's operational status at a glance.

Extinguisher Manufacturing

Installed at the final assembly stage to seal the extinguisher and display the verified, factory-charged pressure.

Vehicle and Marine Units

Robust, stainless steel gauges used on units exposed to vibration and harsh, corrosive environments.

Grow Your Bussiness With KAITUO

  • INNOVATION

    Professional R&D Team

    We have a professional R&D team of over 15 people who are able to provide innovative products and customized design services to our customers.

  • QUALITY

    Product quality assurance

    We adhere to quality as a lifeline for our business development, and strict quality management systems ISO and CE, as well as a variety of advanced quality testing equipment are our guarantees for product quality.

  • PRODUCTION CAPACITY

    Annual output exceeds 400,000

    Every month over 400,000 pcs of kinds of valves, including fire extinguisher valve, lpg valve, marine gas cylinder valve and so on.

  • SERVICE

    One-stop service

    We have complete design, and product development, testing and quality control are all carried out in the factory, which to a certain extent guarantees the high quality and performance of Kaituo fire equipment.

Payment & Shipping: Flexible Global Trade Solutions

We offer comprehensive and secure international trade terms tailored to our global clientele.

  • Accepted Payment Methods:

    Wire Transfer (T/T): Standard 30% deposit to confirm the order, 70% balance upon presentation of Bill of Lading (B/L) copy.

    Letter of Credit (L/C): Irrevocable L/C at sight for large component orders, providing maximum financial security for both parties.

  • Shipping Terms (Incoterms):

    FOB (Free On Board): Ningbo Port is our standard shipping hub.

    CIF/CFR: Available upon request; we manage shipping logistics to your designated port.

  • Packaging:

    Gauges are packed in foam trays or plastic shells to protect the delicate needle and thread fittings during transit.

Comprehensive Information Summary

Minimum Order Quantity (MOQ)20,000 Units (Standard Range), 5,000 Units (High Range/Marine)
Lead Time45-60 Days (Component Stamping, Calibration, Assembly, and Sealing)
PackagingFoam Trays, Individual Plastic Sheaths, Master Cartons.
CertificationsNFPA 10 (Compliance), UL Component Recognized, CE Marked, ISO 9001.
Raw MaterialsBrass/Steel Case, Bourdon Tube (Copper Alloy), Polycarbonate Lens, Threaded Connector.
Customization OptionsGauge Face Printing (Bar/PSI), Custom Scale Range, Case Material (Chrome/Stainless Steel), 1/8 inch NPT or BSP Threading.

Professional Usage Tips

  1. Annual Replacement:

    Gauges are often replaced after a discharge and recharge, as internal components may be damaged by the surge. If the unit is 5-10 years old, consider full replacement to ensure accuracy.

  2. Cross-Check Accuracy:

    During recharge, use a certified test gauge to verify the accuracy of the installed gauge against the standard charging pressure (e.g., 195 psi for a 5-lb ABC unit).

  3. Zero Reading:

    If the gauge reads zero, the extinguisher is fully discharged or has leaked all its propellant and is effectively useless. Tag out and send for servicing immediately.

  4. Overcharge Indication:

    If the needle is in the high red zone, the unit is over-pressurized and may pose a risk. Do not use; send for professional depressurization/servicing.

  5. Sealing:

    Always use the correct PTFE tape or sealant when installing the gauge into the valve port to prevent slow gas leakage over time.

Get in Touch

ABOUT KAITUO
Ningbo Kaituo Valve Co., Ltd., also known as Ningbo Anke Fire Equipment Co., Ltd., is China Fire Extinguisher Pressure Gauges Manufacturers and Wholesale Fire Extinguisher Pressure Gauges Factory, specializing in the research and development, production and export of fire equipment. It owns the anke brand and a number of national high-tech patents.
Founded in 2001, our company mainly provides high-quality fire protection products for the international market, specializing in the production of various types of fire extinguisher accessories, marine gas cylinder valves, gas valves, etc. After years of hard work and continuous improvement of process reform, our products are exported to dozens of countries around the world and have won a good international reputation. All of our products have obtained the EU EN, CE certification in 2007.
Welcome all customers to call and visit us. Our company has a professional sales team to provide accurate services.
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FAQ

This usually indicates the unit is overcharged or has been exposed to high ambient temperatures, increasing the propellant pressure.

No. CO2​ units are checked by weighing them, as their pressure is highly volatile with temperature change.

NFPA 10 requires the gauge needle to be firmly within the operable (green) range during all inspections.

The gauge should be checked monthly by the building occupant and verified during the annual professional inspection.

No. If the lens is cracked or the needle is stuck, the gauge must be replaced entirely to ensure reliability and accurate reading.

The green zone indicates the optimal pressure needed for the agent to discharge at the specified flow rate and distance.

The Minimum Order Quantity (MOQ) for high-volume gauges is typically 20,000 units.

Yes, a proper thread sealant like PTFE (Teflon) tape is necessary to prevent slow leakage of the pressurized propellant gas.

If well-maintained and protected from harsh environments, a gauge can last the full 6- or 12-year service interval, but accuracy checks are critical.

If the needle is even slightly below the green zone, the unit is considered under-charged and must be tagged out and serviced immediately.