- High-pressure, steel hand pump for lifting, bolting, or applying pressure with a hydraulic cylinder (sold separately)
- Advances a single-acting cylinder or powers a hydraulic tool, and can hold a load
- Internal pressure relief valve helps prevent pump overload
- Two-speed pump for applications where there is little or no load initially, but where increased force is needed when the load is applied
- First-stage pressure rating of 500 psi and second-stage pressure rating of 10,000 psi
The Enerpac P-77 two-speed, steel hydraulic hand pump is for lifting, bolting, or applying pressure in intermittent and non-repetitive construction, manufacturing, and maintenance and repair applications. The hand pump can advance and retract a single-acting cylinder or power a hydraulic tool (sold separately) and can hold a load. It has an internal pressure relief valve that helps protect the pump from overload. This two-speed pump is for applications where there is little or no load initially, but where increased force is needed when the load is applied. When no load is present, the pump operates in the first stage, which has a faster flow rate. When the pump senses a load, it switches to the second stage, which requires fewer handle strokes and slows the flow rate to produce more pressure and move the load. The all-steel construction makes this pump more durable than lightweight hydraulic hand pumps and the chrome-plated plunger and wiper system help resist corrosion. It has a built-in handle for carrying the pump between locations. The pump has a 3/8" National Pipe Taper (NPT) threads port for connecting to a hose or gauge (sold separately).
Specifications
Pressure, first stage 500 pounds per square inch (psi) Pressure, second stage 10,000 psi Oil displacement, per stroke, first stage 1.00 cubic in. Oil displacement, per stroke, second stage 0.15 cubic in. Usable oil capacity 47 cubic in. Maximum handle effort 88 lb. Weight 15.6 lb. Dimensions 6.39 x 19.19 x 5.51 inches (H x W x D)H is height, the vertical distance from lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from back to front.
Hydraulic pumps lift, bolt, or apply pressure to objects by pressurizing and moving hydraulic fluid. A hydraulic pump consists of a base, a reservoir that holds hydraulic fluid, and an operating mechanism, such as a handle or foot pedal, an electric motor, compressed air, or a gasoline engine. When the operating mechanism is activated, pressurized hydraulic fluid from the reservoir is delivered through an attached hose to a hydraulic cylinder. The pressurized hydraulic fluid in the cylinder lifts the cylinder’s piston, which in turn lifts the load. Hydraulic hand pumps are usually made of steel, or aluminum and nylon, and can be single-speed or two-speed. They are used in a wide range of applications, such as construction, manufacturing, and maintenance and repair applications in both industrial and home settings.
Enerpac manufactures industrial hydraulic equipment for lifting, workholding, and other applications, and provides integrated lifting solutions for bridge construction, mining, shipbuilding, and other industries. The company, founded in 1959, is headquartered in Menominee Falls, WI.
- Is Discontinued By Manufacturer : No
- Product Dimensions : 19.19 x 5.51 x 6.39 inches; 15.6 Pounds
- Date First Available : November 2, 2011
- Manufacturer : Enerpac
