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Custom 1-2KG Fire Extinguisher Valve 1003

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  • 1-2KG Fire Extinguisher Valve 1003
1-2KG Fire Extinguisher Valve 1003

1-2KG Fire Extinguisher Valve 1003

Parameter table
Material Copper
Surface treatment According to customer requirements (chrome/nickel plated)
Inlet thread M30X1.5
Outlet thread G1/8
Gauge thread  M10X1-12.5/NPT1/8
Dip tube pipe thread  M16X1.5/M16X1
Valve with safety pressure relief device (24±2BAR)
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  • Description

    Used for 1-2Kg Fire Extinguisher.
    The 1-2KG fire extinguisher valve is a key component of fire extinguisher, it have safety device and check valve to prevent accidental release of extinguisher agent.
    Well-designed valves ensure rapid and reliable release of extinguishing agent when needed to respond to fire emergencies. 
    The valve's ease of operation enables users to take quick action in the event of a fire, minimizing damage caused by the fire. 
    In addition, the 1-2kg fire extinguisher valve has precise pressure control capabilities, which can ensure that the appropriate amount of fire extinguishing agent is released when needed and effectively cease  fire.

    • Material

    Copper

    Inlet Thread

    M30×1.5

    Outlet Thread

    G1/8

    Gauge Thread

    M10×1-12.5 / NPT1/8

    Relief Device

    24±2 BAR

    Anatomy of the Valve 1003

    A compact valve built for 1–2kg cylinders still carries every functional component a larger valve has, sized down without being simplified away.

    Valve Body Machined copper housing, threaded M30×1.5 into the cylinder neck
    Squeeze Lever Opens the stem against spring pressure when pressed by hand
    Check Valve One-way seal at the charging port, stopping propellant from escaping back out after filling
    Safety Relief Device Vents automatically at 24±2 bar if the cylinder is overcharged or heated
    Dip Tube Port M16×1.5 or M16×1 threaded connection for the siphon tube reaching the cylinder base
    Gauge Port M10×1-12.5 or NPT1/8 thread, accepting either a metric or NPT pressure gauge
    Outlet Connector G1/8 thread for the discharge hose or fixed nozzle

    How the Valve Responds When Triggered

    The same working principle as a larger valve, compressed into a smaller footprint for handheld and vehicle-mounted units.

    [01]

    Lever Is Squeezed

    Manual pressure on the lever pushes the stem down off its seat.

    [02]

    Discharge Path Opens

    A channel connects the pressurized chamber to the outlet port for as long as the lever stays depressed.

    [03]

    Agent Travels Up the Dip Tube

    Stored nitrogen pressure drives the extinguishing agent from the cylinder base, through the dip tube, into the valve body.

    [04]

    Check Valve Holds the Line During Filling

    At refill, the same check valve mechanism that seals against backflow during use also prevents propellant loss immediately after charging.

    [05]

    Relief Device Stands By

    If pressure ever exceeds 24±2 bar — from overcharging or heat exposure — the relief device vents before the cylinder is put at risk.

    Why a Small Valve Still Uses Copper

    At this size, the case for copper is less about raw strength and more about how consistently it can be machined and sealed.

    Consideration Why It Matters at 1–2kg Scale
    Fine Thread Tolerance Four separate threaded ports (inlet, outlet, gauge, dip tube) fit into a compact body — copper machines cleanly enough to hold all four to spec without distortion.
    Surface Finishing Chrome or nickel plating (offered to customer requirement) adheres evenly to copper, giving corrosion resistance without adding meaningful bulk to a small housing.
    Check Valve Seating The check valve's seal depends on a smooth, consistent seat surface — easier to hold on machined copper than on lower-cost cast alternatives at this scale.
    Weight Budget A 1–2kg extinguisher is often carried or vehicle-mounted, so the valve's own weight is a larger share of the total — copper keeps the component compact without needing thicker walls.

    Where the 1-2KG Valve Fits

    Sized for extinguishers that need to be light enough to carry, mount, or store in a tight space.

    01

    Vehicle Cabins

    Cars, delivery vans, and light trucks carry small extinguishers within reach of the driver — weight and mounting footprint matter as much as fire rating.

    02

    Home Kitchens & Small Offices

    A compact unit mounted near a stove or server room needs to be easy for a non-specialist to grab and operate without hesitation.

    03

    Boats & Small Watercraft

    Limited storage space and exposure to humid, salt-laden air call for a small, corrosion-resistant valve rather than a bulkier industrial one.

    04

    Emergency & First-Response Kits

    Portable kits assembled for construction sites or field teams favor lighter units that don't add significant weight to a carried kit.

    Agent and Cylinder Compatibility

    The valve's port sizing and check-valve design are matched to small stored-pressure cylinders — not every extinguisher format.

    ABC / BC Dry Powder Suited — standard agent for this valve size
    1–2kg Steel or Aluminum Cylinders Suited — matches the M30×1.5 neck thread and dip tube length
    Larger 25–50kg Trolley Units Not suited — higher flow rate needs a larger-bore trolley valve series
    CO2 Extinguishers Not suited — CO2 units need a siphon-free, horn-discharge valve design

    Terminology Reference

    Check Valve A one-way seal preventing pressurized contents from escaping back through the port it entered
    Relief Device A calibrated component that vents pressure automatically once it exceeds a set threshold
    Dip Tube The tube carrying agent from the cylinder base up into the valve during discharge
    Gauge Port The threaded opening where a pressure gauge is fitted to the valve body

    Ordering Information

    Minimum Order Quantity 1,000 units per configuration
    Payment Terms 30% deposit by T/T, balance before shipment; L/C at sight accepted for container orders
    Incoterms EXW, FOB Ningbo, CIF to destination port
    Warranty 12 months against manufacturing defects from shipment date
    Shipment Documents Packing list, commercial invoice, batch test report copy
    Private Labeling Available on carton and pallet labels at 5,000 units and above

    Common Questions

    Q. Why does the outlet use a G1/8 thread instead of a direct nozzle fitting?

    A. The G1/8 thread lets the same valve accept different hose or nozzle configurations depending on the extinguisher assembler's design, rather than locking in one fixed outlet style.

    Q. Can the gauge port take either a metric or an NPT gauge?

    A. Yes — the M10×1-12.5 and NPT1/8 options cover both metric and imperial gauge standards, so the same valve body works for either sourcing preference.

    Q. What does the check valve actually protect against?

    A. It stops the pressurized propellant from leaking back out through the charging port after the cylinder has been filled, which is separate from the lever-and-stem mechanism used during discharge.

    Q. Is this the same valve used on the 4–12kg models?

    A. No — larger cylinders use a different valve series sized for higher flow and a longer dip tube; thread sizes and body dimensions are not interchangeable between the two.

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ABOUT KAITUO

Comfort Starts Here

Ningbo Kaituo Valve Co., Ltd., also known as Ningbo Anke Fire Equipment Co., Ltd., is a young and dynamic 1-2KG Fire Extinguisher Valve 1003 Factory and Custom 1-2KG Fire Extinguisher Valve 1003 Suppliers in China, 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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