A revolutionary pump design when it was developed 35-years ago, Harben’s radial piston diaphragm pumps have established a worldwide track record of proven performance in a multitude of industrial, maritime and pipe cleaning applications.
In addition to the original “P” pump design, Harben now offers Century and Hi-Q pumps for specialized commercial and industrial applications.
The value of high pressure, low flow jetting in the sewer and drain cleaning industry has been proven by the combination of “P” pump reliability, long service intervals, smaller, less costly jetting platforms and reduced power requirements. Learn more.
By dramatically reducing the volume of water required to efficiently clean sewer and drain lines, users have been able to mount light weight, compact jetting units on light duty trucks, easily towed trailers, portable carts and towable skids.
There are several versions of the successful “P” pump that allow users to match pump flow rates, power requirements and output pressure to specific applications. As a group, these “P” pumps develop pressure and flow rate combinations ranging from 4 to 18 gpm at pressures up to 6,000 psi.
Learn more about “P” pump quality and operating value
“P” pumps are used throughout the world in many diverse applications. Here are a few:
Typically application driven, customers have chosen to power “P” pumps by the following methods:
Produced in six models, the Century pump allows industrial and commercial users to achieve numerous pressure and flow combinations suited for specific applications up to 10,000 psi and up to 38 gpm.
With any of the six Century pump models, pressure and flow rates may be adjusted simply by changing the nozzle. For example, the 825.019 pump produces 32 gpm at 2,000 psi; change the nozzle and the output is 20 gpm at 10,000 psi.
Depending on pump output, Century pumps typically require diesel engines delivering 100 bhp to 167 bhp. Heavy duty, 3 phase 420 volt electric motors are an option for industrial users. Learn more
The newest Harben radial piston diaphragm pump is the “Hi-Q”—a four barrel design with a continuous duty performance rating of 25 gpm at 4,000 psi.
Weighing just 298 pounds, this compact, higher volume pump measures just 20.5-inches deep and 19.8-inches side-to-side. The power input requirement at full rated pump capacity is 65 bhp, plus a 10% recommended reserve.
Each stainless steel barrel holds a resilient rubber diaphragm that is blocked at opposite ends by a poly check valve. Water enters and leaves the diaphragm through these two check valves.
As the offset pump shaft rotates, pistons connected to the shaft enter each barrel sequentially through a port machined in the side of the barrel. As a piston enters each barrel, the piston draws oil from the oil filled pump case and presses it into the barrel.
This action squeezes the rubber diaphragm and forces water out one of the two check valves, known as the "delivery" valve.
In effect, the action is like squeezing a cow's udder. Finally, as each piston withdraws sequentially from the corresponding barrel, water is drawn into the rubber diaphragm through the inlet check valve. It's a straightforward, simple to understand and easy-to-maintain pump.