Abstract: A manway cover system used to cover an opening in a tank, the manway cover system having a manway with a top and a bottom surface, at least one valve mounting area on the top surface for mounting a valve thereon, and a hood contact area surrounding each valve mounting area. The hood contact area is that portion of the top surface of the manway to be contacted by an emergency hood if an emergency hood was installed. The system further includes a flange, the flange being attachable to the manway, the flange covering a portion of the hood contact area when so attached. The flange further has an opening therethrough adapted to allow attachment of the flange on the manway without removal of a valve when mounted on the valve mounting area.

Abstract: The present invention provides an interchangeable modular valve-actuator combination whereby the valve stem on the valve and the actuators are configured to be interchangeably engageable. The components of the valve-actuator are sized accordingly so that when engaged, the valve-actuator combination fits within the confines of an emergency hood located under the dome of a transportable tanker.

Abstract: A process instrument isolation valve is disclosed having a valve body, a plurality of valve seats, a stem, a plug attached to the stem, and an actuator. The valve has an inlet, a sensor port and a vent port. In use, the valve is opened allowing process material to enter the sensor port where a measurement is taken. When measurement is complete, the valve is closed. As the valve closes, process material exits the valve through the vent port while at the same closing off the valve to the process, preventing process material from flowing from the process to the vent line.

Abstract: A valve and actuator in combination with a transportation tank to operate off of low pneumatic pressures including a valve having a valve body with a tank end, a valve seat near the tank end of the valve body, the valve seat having a valve sealing surface; a stem chamber extending through the valve body, the stem chamber having an actuator port, a seat port, and an outlet port; a valve stem slidably positioned in the stem chamber, the valve stem having a plug end and a plug attached to the plug end, the plug having a plug sealing surface to sealingly contact the valve sealing surface; an actuator having a hollow housing with a valve end, the valve end attached to the valve body; a plurality of piston assemblies, each having a piston slidable in the housing and a partition fixed in the housing, the piston and the partition defining an actuator chamber; piston spacers joining the pistons so that each piston is fixed in position with respect to the others; the pistons being operatively joined to the valve stem;

Abstract: Disclosed is a gauging device for use in a tanker railcar having a manway cover for attaching a valve having a valve stem, that the manway cover having an opening and a valve mounting recess, a checkvalve positioned in that the manway opening, that the checkvalve having a valve stem contact area, that the gauging device having a plate sized to fit across that the manway cover opening and engage that the valve mounting recess on that the manway cover and that the plate having an opening therethrough, that the opening positioned to substantially align with that the valve stem contact area of a checkvalve. Slidable in that the opening in that the plate is a calibration member, that the calibration member having one end adapted to engage that the valve stem contact area of a check valve and that the calibration member having at least one indicia placed thereon for indicating that the relative position of a checkvalve contact area with respect to a valve stem.

Abstract: A valve/actuator combination to operate off of low pneumatic pressures for use on tanker railcars including a valve having a valve body with a tank end, a valve seat near the tank end of the valve body, the valve seat having a valve sealing surface; a stem chamber extending through the valve body, the stem chamber having an actuator port, a seat port, and an outlet port; a valve stem slidably positioned in the stem chamber, the valve stem having a plug end and a plug attached to the plug end, the plug having a plug sealing surface to sealingly contact the valve sealing surface; an actuator having a hollow housing with a valve end, the valve end attached to the valve body; a plurality of piston assemblies, each having a piston slidable in the housing and a partition fixed in the housing, the piston and the partition defining an actuator chamber; piston spacers joining the pistons so that each piston is fixed in position with respect to the others; the pistons being operatively joined to the valve stem; a helic