Valve arrangement in a feed line to deliver fuel from a tank to an internal combustion engine

A fuel supply assembly, comprising:

• a valve arrangement in a feed line to supply fuel from a tank to a combustion engine, said valve arrangement comprising:
• a valve housing with an inlet and outlet channel, and
• a main valve with a movable valve head to seal the outlet channel from the inlet channel, whereby a feed pump is assigned to the feed line, and the valve head is in a closed position when no feed pressure from the feed pump is operatively provided,
• wherein within the main valve, a second basically coaxial second valve is provided that is in an open position opposite a feed direction when pressure at the outlet channel is operatively greater than the feed pressure,
• wherein the valve arrangement is located between the tank and an injection system of the engine, and
• wherein the valve head is arranged upstream from an associated valve stem.

A helicopter, comprising:

• a valve arrangement in a feed line to supply fuel from a tank to a combustion engine, said valve arrangement comprising:
• a valve housing with an inlet and outlet channel, and
• a main valve with a movable valve head to seal the outlet channel from the inlet channel, whereby a feed pump is assigned to the feed line, and the valve head is in a closed position when no feed pressure from the feed pump is operatively provided,
• wherein within the main valve, a second basically coaxial second valve is provided that is in an open position opposite a feed direction when pressure at the outlet channel is operatively greater than the feed pressure, and
• wherein the valve arrangement is arranged above the tank and below the engine.