> Back to Top
Adding to its successful lines of centrifugal, high pressure, trash and semi-trash pumps, Subaru introduces the PTX301D diaphragm pump. Featuring 3-inch suction and discharge ports, the self-priming PTX301D pumps up to 250 gallons per minute at a maximum pressure of 21 psi. It boasts a maximum suction lift of 25 feet and a maximum lift head of 49 feet.
The design completely isolates the pump mechanism from the fluid being moved, making the model ideal for pumping abrasives, slurries, re-circulated water and other high-solid-material content, up to 2 inches, that cannot be handled by a centrifugal pump. There are no moving parts, so the pump can run dry indefinitely. The positive displacement-type, hermetically sealed compression chamber prevents loss of gases and liquids being moved, while the large shock-reducing air cushion chamber decreases shock on the hoses.
The pump is powered by a 7-horsepower Subaru EX21 overhead cam air-cooled four-cycle gasoline engine, which meets the strictest environmental regulations. A pent roof combustion chamber provides a high compression ratio, while an automatic decompression system allows for easier starting, reducing the required recoil pulling force by 30 to 40 percent over other engines. The 0.95-gallon tank allows for a two-hour run time at full load. A low-oil shutdown system prevents the engine from running should lubrication levels drop, protecting the engine from potential damage. A U.S. Forestry Service-approved spark arrestor also comes standard, lessening noise and the chance of igniting nearby combustibles.
Subaru backs the PTX301D with its two-year limited manufacturer’s warranty, providing for greater reliability and durability. Designed to handle the rigors of construction and rental applications, the PTX301D’s inner casing is constructed of hard cast iron and the entire pump is enclosed within a steel roll cage for further protection. The pump uses a high-quality silicon carbide mechanical seal, and the durable diaphragm is replaceable, adding to the pump’s long service life. The engine’s heavy-duty piston rings and cast-iron cylinder liner resist wear, and a dual ball bearing crankshaft support offers maximum stability.
Contacts for this article: