Abstract: An automatic ring valve 10 comprising a valve seat 12 provided with a plurality of gas flow passages 14 arranged according to at least one annular row, at least a shutter 18 comprising at least one ring-shaped portion for selectively closing and opening the gas flow passages 14, wherein said ring-shaped portion of the shutter 18 comprises a fiber-reinforced matrix 40, at least one contrasting member for contrasting an opening movement of ring-shaped portion of the shutter 18, wherein said ring-shaped portion of the shutter 18 comprises a structural core 18A made by said fiber-reinforced matrix 40, and wherein at least a portion of said structural core 18A is covered by at least one primary layer 18B, designed to improve fracture and/or impact and/or wear resistance of said ring-shaped portion.

Abstract: An automatic ring valve comprising a valve seat provided with a plurality of gas flow passages arranged according to at least one annular row, at least a shutter comprising at least one ring-shaped portion for selectively closing and opening the gas flow passages, wherein the ring-shaped portion of the shutter comprises a fiber-reinforced matrix, at least one contrasting member for contrasting an opening movement of ring-shaped portion of the shutter, wherein the ring-shaped portion of the shutter comprises continuous fibers, at least some of the fibers developing for at least 360° of the annular development of the ring-shaped portion.

Abstract: An automatic ring valve 10 comprising a valve seat 12 provided with a plurality of gas flow passages 14 arranged according to at least one annular row, at least a shutter 18 comprising at least one ring-shaped portion for selectively closing and opening the gas flow passages 14, wherein said ring-shaped portion of the shutter 18 comprises a fiber-reinforced matrix 40, at least one contrasting member for contrasting an opening movement of ring-shaped portion of the shutter 18, wherein said ring-shaped portion of the shutter 18 comprises a structural core 18A made by said fiber-reinforced matrix 40, and wherein at least a portion of said structural core 18A is covered by at least one primary layer 18B, designed to improve fracture and/or impact and/or wear resistance of said ring-shaped portion.

Abstract: A system for driving a reciprocating compressor is disclosed. The system includes a reciprocating compressor with a crankshaft. A Stirling engine is drivingly connected to the crankshaft of the reciprocating compressor. A heat source, for example a waste heat source, provides heat to the hot end of the Stirling engine. Heat is partly converted into mechanical power to drive the reciprocating compressor.

Abstract: The reciprocating motor-compressor comprises a frame wherein a crank-shaft is rotatingly housed. Compressor pistons are drivingly connected to the crankshaft and are reciprocatingly moved thereby in respective compressor cylinders. The crankshaft is driven into rotation by an em-bedded Stirling engine. The Stirling engine comprises at least a hot cylinder and a cold cylinder, wherein a respective hot piston and a respective cold piston are reciprocatingly moving. Thermal power is provided to the hot cylinder and partially converted into mechanical power for driving the reciprocating compressor.

Abstract: The CNG system comprises a gas inlet line and a reciprocating compressor arranged and configured for compressing gas from the gas inlet line and delivering compressed gas towards a dispenser. A Stirling engine is drivingly connected to the reciprocating compressor. A burner receives gas from the gas inlet line and generates thermal energy for powering the Stirling engine.

Abstract: An automatic ring valve comprising a valve seat provided with a plurality of gas flow passages arranged according to at least one annular row, at least a shutter comprising at least one ring-shaped portion for selectively closing and opening the gas flow passages, wherein the ring-shaped portion of the shutter comprises a fiber-reinforced matrix, at least one contrasting member for contrasting an opening movement of ring-shaped portion of the shutter, wherein the ring-shaped portion of the shutter comprises continuous fibers, at least some of the fibers developing for at least 360° of the annular development of the ring-shaped portion.