Filter container with double construction

A filter container, comprising:

• a sheath member;
• a disposable unit container housed in said sheath member;
• at least one cartridge filter disposed in said disposable unit container, said at least one cartridge filter having upper and lower ends with upper and lower end faces and an inner hole;
• at least one upper end cap on said upper end of said at least one cartridge filter, said at least one upper end cap having an annular sealing edge for sealing said upper end face of said at least one cartridge filter;
• and
• a bottom end cap having a cylindrical cartridge stopper for said at least one cartridge filter, said cylindrical cartridge stopper fitting into said inner hole of said at least one cartridge filter at said lower end face thereof, wherein said at least one cartridge filter is fixed in said unit container by being held between said at least one upper end cap and said bottom end cap;
• wherein said sheath member comprises a cap and a base having liquid inlet and outlet pipes, said base being attached to said cap;
• wherein a liquid inlet port and a liquid outlet port are provided in said unit container;
• and
• wherein shut-off valves are provided in respective said liquid inlet and outlet ports for operation by said liquid inlet and outlet pipes of said base of said sheath member.

A filter container, comprising:

• a sheath member comprising a cap and a base, said base having liquid inlet and outlet pipes, and said base being attached to said cap;
• a disposable unit container housed in said sheath member, comprising a base disc member having a liquid inlet port, a liquid outlet port and shut-off valves for closing the respective said ports and for operation upon engagement by said liquid inlet and outlet pipes, and a cylindrical body member having an upper smaller diameter portion having a diameter smaller than said base disc member and a lower portion at the lower end of said cylindrical body member extending from said smaller diameter portion, defining a conical shoulder, and connecting said cylindrical body member to said base disc member;
• and
• at least one cartridge filter in said disposable unit container, said at least one cartridge filter having an upper end that is sealed separately and independently from any other said cartridge filter in said disposable unit container.

A filter container, comprising:

• a sheath comprising a base having a liquid inlet pipe and a liquid exhaust pipe, said base being directly connectable to pipe lines, and a cap, said cap being integrally attachable to said base;
• a disposable unit container to be housed in said sheath, said disposable unit container having a liquid inlet port and a liquid outlet port therein, and further having shut-off valves therein in respective said ports for closing said ports and opening said ports upon engagement by said liquid inlet pipe and said liquid exhaust pipe;
• at least one cartridge filter housed in said unit container, said at least one cartridge filter having opposite ends;
• end caps in said disposable unit container engaging said opposite ends of said at least one cartridge filter.