PMD Technology

Description

What is a PMD? Propellant Management Devices, or PMDs, are static all metal structures inside spacecraft propellant tanks that use surface tension to ensure gas free liquid delivery to the tank outlet. They can be made entirely from titanium allowing their use in the most corrosive propellants. With no moving or deforming parts, they are inherently reliable. Who Needs a PMD? Anyone who needs liquid access or liquid control in space. PMDs are found in many satellites, solar system probes, rockets, and the Space Shuttle. They are used mostly for propellants but can be used in water systems, thermal systems, cryogenic systems and, in fact, in any space bound liquid system. Why Use a PMD? PMDs can be made completely from titanium (or from any suitable solid). This makes them compatible with any liquid and very lightweight - unlike the alternatives such as rubber bladders. Plus PMDs are much more reliable since they have no moving parts. How do I get a PMD? Each PMD is custom designed for the mission. First, the spacecraft or spacecraft subsystem builder must define the PMD requirements in a specification (PMD Technology can help). Second, PMD Technology will work with the customer to custom design the optimum PMD solution; trading cost, weight, reliability, and performance. PMD Technology Capabilities Expertise in All Types of PMDs In Depth Knowledge of Low Gravity Fluid Dynamics Extensive Heritage Superb Customer Support Robust and Reliable Engineering PMD Technology Services PMD Concept Determination PMD Design, Analysis, and Validation Low Gravity Fluid Dynamics Consulting Spacecraft Mission Redesign and Rescue PMD vs. Spacecraft Operations Trade Studies Liquid Position and COM Determination Liquid Slosh Models for Attitude Control Nutation Time Constant Determination PMD Technology Partner PMD Technology works with ATK Space Systems Incorporated (formerly Pressure Systems Incorporated) to make sure your Propellant Management Device is manufactured to the highest quality. No one has provided more flight proven PMDs than PMD Technology and ATK Space Systems Incorporated 500+ PMDs Flying ZERO FLIGHT FAILURES

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