Pyrotechnic Delay | Delay Sequencing

Delayed Initiator | Ordnance Delay | Pyrotechnic Time Delay

YOUR MISSION-CRITICAL OBJECTIVES ARE PERFECTLY TIMED WITH A PACSCI EMC PYROTECHNIC DELAY, NO MATTER HOW ROBUST THE ENVIRONMENT.

Interested in our Pyrotechnic Delay?

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HOW PYROTECHNIC TIME DELAYS WORK

Our pyrotechnic delay is used to provide a controlled delay time from initiation stimulus to the device, to the time the device provides an output. The delays are typically initiated by standard detonating tips, deflagrating lines or hot gas and contain products of combustion. A time delay usually includes a pyrotechnic cartridge within a housing that is hermetically sealed and the Small Column Insulated Delay (SCID) delay element. The SCID is the pyrotechnic element consisting of a controlled burn rate fuse material within a metal sheath. The housing is the protective container that holds the cartridge and provides the required interfaces for the input and output devices. PacSci EMC pyrotechnic time delays range from 50 milliseconds to 10 minutes. Time tolerances are typically +/- 20% across the operating temperature range. A time delay provides a stand-alone device, but can be packaged with other time delays or devices to meet customer application needs.

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FUNCTIONS & APPLICATIONS

Functions

Pyrotechnic time delays are used in applications requiring high reliability, environmental durability, and containment of combustion products. They are typically used as part of a logic structure to provide key sequencing of ordnance networks. The delays are used across a wide range of military and aerospace platforms where high reliability, compact packaging, controlled timing, versatile input/output capabilities, proven durability through multiple environments, and high energy output are necessary.

Applications

Our pyrotechnic time delays are qualified and used on space applications including Delta Launch and Orbital Vehicles. Our time delays are also used on airframe applications including Martin Baker Ejection Seats, B-1, F-15, F-111, T4 T-38, F-18, TF-18, Air Force and Navy Crew Escape, not to mention oil and gas “down hole” environments.

PERFORMANCE CHARACTERISTICS

  • Input Stimulus
    Detonating, deflagrating or gas pressure
  • Output
    Detonating, Deflagrating or Hot Gas (Initiator)
    Deflagration – Tailored peak output pressure performance in 10cc closed bomb
    Detonation– Minimum 0.010” increase in diameter of witness cap.
  • Timing
    Milliseconds to 420 seconds
  • Operating Temperature
    -70 °F to +220 °F, up to +475°F
  • Shock
Frequency (Hz) Spectrum Level (Q=10)
100 180 G
160-800 570 G
4200-10000 2200G
  • Pre-function hermeticity
    1 x 10E-6 cc/sec He @ 1 atm
  • Applicable Specifications
    DOD-E-83578A,
    Mil-C-83124

ENVELOPE/INTERFACE DESIGN

Geometric interface and input stimulus features can be customized to meet your applications.