A valve manifold block for a fluid valve manifold has a valve manifold block with a printed circuit board received in a passage in the valve manifold block. A set of conductive valve lines on the circuit board extend between and are connected to a respective set of first electrical connectors and a respective set of second mating electrical connectors. The circuit board also having at least one conductive valve line extending to a third connector on the circuit board operably leading to one voltage side of the valve unit. A conductive common line is operably connected to an opposite voltage side of the valve unit. A serial communication line connects to a respective serial communication line in another valve manifold block for communicating information relating to the valve unit.

Embodiments relate to valves comprising a member such as a plate or poppet, that is moveable relative to a stationary seat. The state of the member may be maintained against opposing forces with relatively little expenditure of energy. According to one embodiment, a poppet displaced from seating in the valve seat, may be held in position against opposing forces tending to close the valve, until a desired flow of gas through the valve has taken place. The poppet may then be released as desired, such that those opposing forces serve to passively close the valve. The valve may be secured in position utilizing mechanical, magnetic, electromagnetic, pneumatic, electrostatic, or hydraulic approaches. Valve embodiments may be particularly suited to controlling gas flows for compression and/or expansion in an energy storage system.

A valve that includes a control spline positioned to move from a first position to a second position and the control spline being axially rotatable in both the first position and second position. The valve also includes a portion of a first fluid mixing cartridge rotatably coupled to at least one portion of the control spline when the control spline is in the second position. The valve includes a portion of a second fluid mixing cartridge rotatably coupled to the at least one portion of the control spline when the control spline is in the second position and the first fluid mixing cartridge is configured to rotate in a different direction than the second fluid mixing cartridge when the control spline is in the second position.

A gas-fueled heater can have a housing with pressure regulators, a control valve, a fluid selection valve and a burner positioned therein. The pressure regulators, control valve, fluid selection valve and burner can be configured to combust a fuel to create heat. The housing can include a number of holes passing therethrough to control access to the various components.

A valve that includes a control spline positioned to move from a first position to a second position and the control spline being axially rotatable in both the first position and second position. The valve also includes a portion of a first fluid mixing cartridge rotatably coupled to at least one portion of the control spline when the control spline is in the second position. The valve includes a portion of a second fluid mixing cartridge rotatably coupled to the at least one portion of the control spline when the control spline is in the second position and the first fluid mixing cartridge is configured to rotate in a different direction than the second fluid mixing cartridge when the control spline is in the second position.