BCNA was incorporated in 1982 in the State of Colorado for scientific and educational purposes. BCNA is a non-profit, tax-exempt, corporation under section 501(c) (3) of the Internal Revenue Service Code. Click this link for a brief history of BCNA, listing initial and continuing projects and a number of publications.
The spring is typically located around a central shaft that is attached to the closing disk. The entire assembly is securely enclosed in a machined brass housing that contains the workings of the check valve. The check valve is generally located above the submersible pump unit by a few inches. This ensures that the long column of water remains in the well pipe. This increases the efficiency of the pump by not having to refill the length of the pipe every time the system calls for water.
The sequence valve is located on the front of the gate tower. This location prevents dirt from building up on the tongue of the scraper. The location allows the gate cylinder to be rotated with the ports facing up, providing improved hose routing on the scraper and sequence valve.hen the gate is fully opened, the sequence valve switches the hydraulic fluid over to the bucket cylinder to start dumping the material. When the ejector wall returns to the rear position, the sequence valve switches the hydraulic oil over to the gate cylinder to start closing the gate.