Pressure Cartridge

Product Description

Pressure Cartridges have their greatest utility generating high rates of pressure force for a short period of time. Displacement devices such as pin pullers, normally open or closed valves, thruster and separation bolts utilize this device. In several ejection seats pressure cartridges are utilized as an initiator for propellant charges. Pressure cartridges are adaptable to the requirements of your system for different pressure output to accomplish specific events. Our 103377 series has over 400 variations utilized in a wide range of aerospace and defense platforms. Our 817444 series cartridge has become a standard within the ejection seat community to initiate other explosive devices because of its high reliability and robust design.

Pressure Cartridge
Specifications Interface


  • No-Fire
    1 amp / 1 watt current applied for five (5) minutes
  • All Fire
    3.5 amps minimum
  • Operating Temperature
    Typical -65°F to +200°F
  • High Temperature Exposure
    +225°F for 12 hours, fired properly
  • Low Temperature Exposure
    -80°F for 12 hours, fired properly
  • Weight
    Range from approximately 0.20 – 0.60 lbs. (dependent on explosive weight utilized)
  • Function Time
    Pressure Cartridge: <10 ms maximum at 5 amps
  • Electro-Static Discharge Resistance
    No-fire upon applications of 25,000 volts from a 500 Pico farad capacitor between pins and from shorted pins to case with a 5,000 ohm resistor in a 5 micro Henry total inductance series circuit
  • Bridgewire Resistance
    0.90 – 1.30 ohms each bridgewire
  • Insulation Resistance
    100 Megaohms minimum at 500 VDC for all pins to case
  • Hermetic Seal
    < 1×10-5 cc/second air at a pressure differential of 1.0+ 0.1 atmosphere
  • 6 & 40 foot drop tests
    Units didn’t fire upon impact.
  • Shock
    Half sine, 200 g’s; one shock each direction each axis
  • Vibration
    10-2000 Hz, Composite 12.3 grams, 2 hours/axis, Composite 9.09 grams, 30 minutes/axis
  • Acceleration
    32g longitudinal axis, 16g transverse axes, duration 5 minutes
  • Pressure Cartridge Specific
    • Output: Designed to meet your requirements:
      For reference see 817444 series table below or view our 103377 series table
    • 6 foot drop also functioned normally when initiated.
    • High Temperature Environment: No cook off at 250°F
    • High Temperature Exposure: No adverse effect at 225°F, fire properly
    • Salt Spray: 5% Sodium Chloride solution + 95°F for 48 hours
    • Acoustical Noise: 160 + 3 dB, 8 minutes duration


Many features, such as the connector, thread, length, output, and other features can be customized to meet customer applications.


Additional output options include:

Product No.Peak Pressure (PSIG)VolumeCurrent (AMPS)
817444-11600 ±25010.0 cc5.00 min
817444-2925 ±2251.0 cu in4.5 min
817444-5540 ±14010.0 cc5.0 min
817444-6800 nominal10.0 cc5.0 min
817444-7540 ±14010.0 cc5.0 min
817444-81400 ±20010.0 cc5.0 min
817444-501540 ±14010.0 cc5.0 min

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