Standard Package Emergency Shut-Off Valves Manual, Fire Rated Isolation Valves Relief Valves Pressure,Temperature, and Level Indicators Enhanced Control Package Standard Package plus: Pressure, Temperature, and Level Transmitters Indicators Remote / automatic safety valves are standard storage tank trim on SSi systems. Note: To purchase the Enhanced Package you must also purchase the Enhanced Control Option which includes a PLC necessary to read the transmitters. Optional Items Multiport valves Actuated fire rated, back-up isolation valves