초록 ▼

A pressure control system for accurately controlling the pressure of the air in a discharge line during a pneumatic offload includes a blower, a supply of pressurized air and a pressure relief valve. The blower directs a stream of air into the discharge line to produce a positive air pressure. The p

A pressure control system for accurately controlling the pressure of the air in a discharge line during a pneumatic offload includes a blower, a supply of pressurized air and a pressure relief valve. The blower directs a stream of air into the discharge line to produce a positive air pressure. The pressure relief valve includes a valve body defining a hollow valve chamber, a valve positioned within the valve chamber and a valve seat opposite the valve. The valve chamber of the pressure relief valve is in fluid communication with the discharge line through a first inlet port and in fluid communication with the supply of pressurized air through a second inlet port that receives air from the supply of pressurized air. The valve chamber of the pressure relief valve is also in fluid communication with the ambient atmosphere through at least one outlet port. Accordingly, the pressure relief valve vents the air in the discharge line to the ambient atmosphere when the pressure of the air in the discharge line exceeds the pressure from the supply of pressurized air. One or more pressure regulators may also be provided to regulate the pressure of the supply of pressurized air and at least one solenoid valve may be provided to select one of the pressure regulators in response to a predetermined operating condition. The pressure control system may also include a controller for automatically activating and initializing the pressure control system from a remote location.

대표청구항 ▼

1. A pressure control system for controlling the air pressure in a discharge line during a pneumatic offload of a dry bulk good from a tank truck, said pressure control system comprisinga supply of pressurized air; a blower in fluid communication with the ambient atmosphere and with the discharge li

1. A pressure control system for controlling the air pressure in a discharge line during a pneumatic offload of a dry bulk good from a tank truck, said pressure control system comprisinga supply of pressurized air; a blower in fluid communication with the ambient atmosphere and with the discharge line, said blower operatively coupled to a power take off (PTO) from the engine of the tank truck; a pressure relief valve in fluid communication with said supply of pressurized air and with the discharge line, said pressure relief valve operatively positioned in the discharge line downstream of said blower; and a controller electrically connected to the power take off (PTO).