Talk:Pistonless pump

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disadvantages of pistonless pump

They cannot pump to higher pressure than drive gas. — Preceding unsigned comment added by 117.199.62.52 (talk • contribs) 29 February 2012 (UTC)
 * They cannot use either a staged combustion or expander cycle.
 * A gas generator cycle is also difficult to integrate  with the piston less pump.
 * The generated gas must be chemically  compatible with both the propellants.