Fluid equipment

Fluid equipment comprising a container configured for holding a first fluid and a second fluid housed therein, a first fluid outlet/inlet path provided at the container for outflow and inflow of the first fluid, a second fluid outlet/inlet path provided at the container for outflow and inflow of the second fluid, and a moving member configured for moving in the container in response to a pressure of the first fluid, the fluid equipment transmitting energy from the first fluid to the second fluid,

• the fluid equipment further comprising a first bellows and a second bellows configured for expanding and contracting,
• the first bellows having a first end portion closed in a sealed state by the moving member and a second end portion fixed to a first inner surface part of the container in a sealed state,
• the second bellows being opposed to the first bellows through the moving member, said second bellows having a first end portion closed in a sealed state by the moving member and a second end portion fixed to a second inner surface part of the container in a sealed state,
• an inside of the first bellows being configured for communicating with the first fluid outlet/inlet path,
• the first fluid and the second fluid being non-compressible fluid,
• the container being provided with a first fluid chamber formed inside the first bellows and a second fluid chamber formed inside the second bellows,
• the first fluid chamber and the second fluid chamber storing the first fluid and the second fluid, respectively, and being in non-communication,
• the fluid equipment further comprising a seal member attached to the moving member, the seal member being configured for closing the first fluid outlet/inlet path,
• the second bellows being smaller than the first bellows in diameter, and
• a gas chamber being formed outside the second bellows and the first bellows and having a gas injected thereinto.