Penn Valley Pump Company, Inc. has been developing, manufacturing and marketing Double Disc Pumps™ for the municipal, industrial and chemical industries since 1980. Through continuous research and development we have created a range of positive displacement solids handling pumps that provide unmatched durability, reliability and performance compared with other positive displacement pump styles.

With thousands of units installed and operating in the Unites States alone, Double Disc Pumps™ are considered by many to be the premier product for feeding and transferring tough to handle sludges and slurries. We have achieved this level of acceptability by utilizing our extensive experience in the hydraulic and mechanical aspects of pumping installations to properly apply our equipment where it is best suited.

When you purchase a Double Disc Pump™ you buy our long term commitment. We size a unit specifically for your application, selected by engineers with over 45 years combined experience in designing, engineering, manufacturing and applying this exciting technology.

Contact us today and let Penn Valley show you how the Double Disc range of pumps can meet your pumping needs.

The Ultimate in Positive Displacement Pumps for the Municipal, Industrial, Chemical and
Food Processing Industries.

The Operating Principle Behind
Double Disc Pumps™

The Operating Principle Behind the Penn Valley Double Disc Pump
The suction disc (left) is lifted from it's seat creating a vacuum. The cavity between the discs is filled during the reciprocating motion of the suction disc. The discharge disc is sealed.

The Operating Principle Behind the Penn Valley Double Disc Pump
The reciprocating action then causes the suction disc (left) to seat and create a seal in the flow path and a downward motion of the discharge disc (left) forces the discharge.
Double Disc Pumps™ combine the performance features of a positive displacement pump and the principle of “Induced Flow” to provide superior versatility in fluids handling. Based on a “Free-Diaphragm™” technology, the pump utilizes a unique principle of operation where the discs perform the duties of both diaphragm and valve, providing a double acting, non clogging, pumping action.

Through an arrangement of connecting rods and a camshaft, a reciprocating action of the discs is created, forming a large cavity between the discs. This cavity is filled and exhausted in a continuous flow.

The large valve like discs mean that solids and rags can be handled without loss of pumping action. The valve like discs have large seating areas that provide for low internal velocities, extending the pump wear life on abrasive sludges and slurries.

The fluid chamber is sealed with flexible trunnions which eliminates packings, mechanical seals, and requires no flushing water or other forms of lubrication. The large diameter discs are proven to handle large solids, rags, plastics, etc., that would cause other pumps to fail.