Advanced technology hydraulic pumps developed for simultaneous operation of up to four torque wrenches are being engineered in Australia and New Zealand by Enerpac . The cool-running and energy-saving ZU4T pumps from Enerpac incorporate a four- wrench manifold that can be factory fitted or ordered separately. These ZU4T pumps are designed for bolting applications.
The ZU4T pumps weigh between 32kg to 36kg, and are engineered to save time and labour on repetitive tasks while improving operator safety. ZU4T pumps can be used for all major brands of 700 and 800 bar single-acting and double-acting torque wrenches. This offers auto-cycle for continuous cycle operations and quick, secure coupling by way of Parker spin-on-couplers for 700 bar models and Enerpac lock-ring couplers for 800 bar models.
The ZU4T pumps’ high-efficiency two speed pumps feature higher oil flow and bypass pressure (85 bar) for cooler running that requires less current draw. An optional heat exchanger is also available to provide even cooler operation by removing heat from bypass oil, increasing oil life and reducing wear of the pump and other hydraulic components.
The ZU4T’s self-priming first stage increases pump performance by supercharging the second stage piston pump, improving oil flow in both hot and cold weather operations. According to Enerpac, the new generation ZU4 pumps are built to run cooler than conventional designs with greater durability, lower operating costs and simpler service in bolting-intensive industries.
ZU4T pumps are used in the following applications:
- Materials handling
- Metal working
- Mining and oil
- Primary processing
Enerpac’s ZU4 series feature a powerful 1.25kW universal motor coupled with a new pump element design that reduces oil flow turbulence, producing an industrial workhorse with fewer moving parts and less friction.
The ZU4 series pumps’ increased flow rates, reduced heat generation and decreased power needs translate into higher productivity and reliability for repetitive applications such as bolting, crimping, cutting, fabrication, lifting, lowering, materials handling, maintenance, pressing, pushing, pulling and production and process engineering.
Z-class technology provides high bypass pressures for increased productivity in applications using long hose runs and in high pressure-drop circuits, or in some applications involving double-acting cylinders and tools. The ZU4’s light weight and compact design makes it suitable for applications requiring easy transport. The ZU4’s universal motor works well on long extension cords or generator-driven electrical power supplies.
The pumps feature a low-voltage (15V DC) pendant with sealed switches for remote operation and enhanced operator safety. ZU4T pumps are part of a family of professional bolting technology from Enerpac, which has been a supplier of 700 bar hydraulic equipment in Australia and New Zealand.