Pyrotechnic Tube Cutter
Compact & Confined. Reliably Sever & Seal.
A Pyrotechnic Tube Cutter opens pressure diaphragms or completely severs and then seals metal tubes of varying diameters and wall thicknesses carrying pressurized fluids. The tubing cutter/sealer is used to cut and seal two stainless steel (which can be Teflon lined) tubes.
The tubing cutter/sealer assembly primarily consists of the body, anvil, one electrically fired gas pressure cartridge, four shear pins and cutter assembly. The cutter assembly consists of the piston, crimper and blade. The crimper and blade are attached to the piston by two of the shear pins (sequencing pins). The piston is secured in the body by the other two shear pins (initial lock pins). The body provides for the installation of the cartridge, attachment of the anvil, and housing for the cutter assembly. Lugs, for attaching the tubing cutter/sealer to the releasing structure, are an integral part of the body.
Count on our compact, structurally confined pyrotechnic tube cutter. Built for speed and accuracy. Tailor made for mission-critical wins.
How A Pyrotechnic Tube Cutter Works
Our pyro tube cutter can be mechanically, electrically or laser initiated. After initiation, energetic material drives the cutter blade to forcibly slice the tubing material and stops against the anvil while the tubing is instantaneously released. Energetic loading, blade geometry, anvil geometry, and structural materials are all variable based on target and application requirements. Time from input of firing energy to completely severing the target material is on the order of several milliseconds for most applications.
We have designed and manufactured 100’s of different cutters for 100’s of applications. Qualified and used in various military, commercial, and aerospace platforms including spacecraft, launch vehicles, aircraft (military and commercial), satellites and multiple missile platforms.
Pyrotechnic tube cutters are used to sever corrugated steel tubes on a multitude of applications. Typical applications for pyro cutters are stage separation systems, releasing pre-loaded / folded assemblies ( i.e. wing, fin, etc.) and releasing cargo or munitions, and flight termination systems (FTS).
- Operating Temperature
-54°C to +71°C (-65.2°F to 159.8°F)
- Function Time
With the application of the All-Fire current, the cutter will completely sever the target in < 20 milliseconds
99% at 95% confidence level
10,000 feet underwater to Deep Space
- Estimated Weight
27 to 173 grams
- Target Materials
Corrugated steel tubing up to ½ inch diameter
- Applicable Specifications
Bridgewire Resistance 0.9 to 1.30 ohms
Insulation Resistance 100 megohms 500 VDC
No Fire 1 amp/ 1 Watt for 5 Minutes
Recommended All Fire 4.0 Amps for 50 millisecond duration
ESD 25KV Electrostatic discharge: 25 kV DC from 500 pF Cap thru a 5k ohm resistor – shorted pins to case and pin-to-pin
Electrical connections can be lead wire, bayonet or threaded connectors
Energetic loading, blade geometry, anvil geometry, and structural materials are all variable based on target and application requirements. Each blade is optimized for the intended target material to ensure precision severance.
Questions to Consider
- Application – what are you trying to accomplish?
- What are your target materials?
- What are your space constraints?
- Is containment required?
- Redundancy requirements?
- Input power requirements – electrical, ETL, mechanical?
- Environmental requirements?
- Qualification requirements?
- Military or other requirements?