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Balancing Valve - 2 Pages

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Balancing Valve

Catalog excerpts

Balancing Valve DESCRIPTION The Graco® Balancing Valve assists divider valves to accurately proportion lubricant at high differential pressures. It is recommended for use when a pressure difference greater than 1,000 PSI exists between two or more of the points in a Graco divider valve system. The balancing valve is not affected by downstream pressure variations. The preset pressure setting will maintain a uniform pressure throughout the system that assures accurate and efficient system operation. Figure 1 Balancing valve set at 4,500 PSI OPERATION (Figure 2) The area (A) behind the check ball piston is sealed from downstream pressure. Because this area and the seat area (B) of the check ball are equal, the valve is balanced and is not affected by downstream pressure. As pressure upstream of the valve rises above the spring setting, the check ball unseats, allowing fluid to pass through the valve. As pressure drops, the spring closes the check ball until pressure again exceeds the spring setting. Figure 2 Balancing valve is not affected by downstream pressure, assures accurate flow to all lubrication points. • Balancing valve is field adjustable. Reduces on-site inventory costs as one model meets all your system needs. • Balancing valve is in-line mounted, so it lowers installation costs. • Balancing valve uses a wear-resistant tungsten-carbide ball to reduce maintenance costs.

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INSTALLATION SPECIFICATIONS Material Max Operating Pressure 6500 psi Adjustable Operating Temperature A balancing valve must be mounted with the outlet up to permit removal of trapped air and improve the operation of the valve. See Figure 4. TYPICAL APPLICATION Figure 3 The Graco balancing valve is factory set at 2,000 PSI. When changing pressure setting, it is recom­ ended that a pressure gauge m be installed at the inlet of the balancing valve to determine the pressure required to open the valve. To change the pressure setting, loosen the locknut on the adjustment screw and turn the screw...

 Open the catalog to page 2

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