There are many different kinds of hydraulic pumps, and there are two main categories into which all hydraulic pumps can be divided. The first category involves hydraulic pumps that operate independent of auxiliary power sources like gas and electric motors. These hydraulic pump varieties can make use of a liquid’s kinetic energy in order to move it from one place to another. Read Moreā¦

Leading Manufacturers
Metro Hydraulic Jack Co.
Newark, NJ | 800-633-8234Here at Metro Hydraulic Jack Co. we manufacture hydraulic solutions for a number of markets including: agricultural, municipal, construction, mining and transportation. Our company has an extensive history of engineering success.

Ohio Power Tool
Columbus, OH | 800-242-4424Sales, service and rental for all major brands of hydraulic pumps and other air, electric and hydraulic equipment. Hydraulic pump offerings include hand pumps, air pumps, electric pumps, gas pumps and intensifiers. Highly skilled at matching tool to application for hydraulic pumps and more.

Progressive Power and Control
Indianapolis, IN | 800-875-5196We are the ones to turn to for hydraulic equipment sales, custom motor systems, hydraulic repair and emergency replacement. Within the parameters of hydraulic motors, you can obtain hydraulic pump motors, heavy duty motors, hydraulic wheel motors, rotating case motors and more.

SunSource
Addison, IL | 888-786-7723SunSource has been servicing the manufacturing and service sector for over 70 years. We offer hydraulic pumps, components, and straightening services. We distribute all major brands and can meet any requirements, whether your application is high pressure, low pressure, high volume or low volume. Let us serve you today. Call or visit us online for a detailed product and service listing.

ZEMARC Corporation
Los Angeles, CA | 323-721-5598Zemarc Corporation is a world-class manufacturer of pumps, valves, flow controls, hydraulic power units and other products. We are known not only for our product excellence but for our competitive pricing and the ready availability of our products when customers need them.

These pumps are usually called ram pumps, but they also sometimes go by other names; hydraulic hand pumps, for example, are never referred to as ram pumps, though both machines' principle of operation is similar. Ram pumps are increasingly popular in the developing world because they can be used, without the use of fuel or electricity, to pump water from rivers, streams or other sources to places where it is needed.
Because fuel and electricity can be scarce or expensive in many parts of the developing world, ram pumps are a very attractive water pumping solution. The other main category involves hydraulic pumps that make use of auxiliary power sources. These pumps are often used for the transmission of hydraulic fluids in machinery as well as in some other uses, such as in pressure washers.
The first category of hydraulic pumps harnesses natural forces and the kinetic energy of the fluids involved in pumping. In a ram pump for example, an inlet pipe on slight decline directs water away from its source and into the pump reservoir. As the water flows into the reservoir, the force of gravity and the water's kinetic energy cause pressure to build up. When sufficient pressure is built, a valve above the reservoir opens, which allows for the pressurized water to flow out into a pressure chamber.
The water in this chamber becomes further pressurized, which eventually forces it out of the chamber and into a tube that ultimately directs the water to its final destination. Relief valves and pressurized air are also involved in this process in order to avoid bursting pipes or ruptures in the pumps' reservoirs. The second category involves drawing hydraulic fluids like oil out of a reservoir and into a hydraulic system. This process usually involves cylinders and a series of tubes through which the fluid travels and is subject to varying levels of pressure.