EWI Services is one of the leading USA hydraulic power pack manufacturers and suppliers. We provide these power packs in both standard and custom-built designs. Available in auto cut-off and holding types, these power packs have a quality finish suitable with epoxy paints / powder coating. We ensure that our power pack systems have a compact design, rust-free nature, and quality cylinders with single/double acting. Our range of hydraulic power pack components is tested on various parameters like durability, resistance, and shelf life to ensure quality products to our customers.
The power pack offers capacities, control options, and configurations for virtually any application requirement. A wide variety of manifold options and choice of pumps enables the customer to match any application requirement with a power pack that meets his system while ensuring cost-effective operation and optimum productivity.
In addition to supplying standard hydraulic power packs from our wide range, we specialize in designing and manufacturing hydraulic power packs according to the customer’s specific requirements.
EWI Services specializes in developing hydraulic systems from inquiry to final commissioning and after-sales service. Numerous customized Hydraulic Power Packs are designed after understanding the user’s applications and needs.
We have developed a dedicated “Hydraulic Power Pack Testing Machine.” Each and every Hydraulic System is delivered only after passing through this testing machine.
Features of our Hydraulic Power Packs
Tank
- Tanks are fabricated from mild steel or Stainless Steel and also from Die Cast Aluminum.
- Tanks are Designed with sufficient thickness to ensure strength and rigidity and minimum weld joints.
- Tank Top Plate is Mild Steel, Stainless Steel, or Aluminium of sufficient thickness to ensure rigid support to the whole assembly.
- All joints like top plate assembly to tank, pipe entries from top plate, etc. are sealed using suitable elastomer.
- Manhole covers are provided in front of the tank to facilitate cleaning and maintenance.
- A Baffle Plate is provided inside the tank to isolate pump suction from turbulence of the return line.
The following standard accessories are provided:
- The oil collection tray on the top in the periphery
- Drain Valve
- Air Breather
- Oil Level Gauge
- Inspection Cover
The following Optional accessories are provided:
- Oil Level Gauge
- Temperature Gauge
- Temperature Sensor, Digital Temperature Switch
- Flow Meter and Flow Switch
- Electrical Terminal Box
Tubing
- Cold Drawn Seamless tubes as per DIN2391 are used for piping.
- Ermetto bite-type ferrule fittings are used for low pressures and weld on nipple or SAE flanges are used for high pressures.
- Tubes are suitable for oil velocity and pressure.
- All pipes are well supported using suitable clamps aesthetically laid out.
- All pipes are pickled, zink plated and cleaned with kerosene before assembly.
- Hoses are used at locations prone to vibrations.
Motor – Pump Unit
- The unit is either mounted vertically with the pump immersed inside the tank for positive suction and low noise level or horizontally for ease of replacement as per choice.
- Generally 15HP and above installations are horizontal and on anti–vibration pads and common plates.
- Large pump-motor assemblies are also mounted at the side of the tank for positive suction. They are provided with isolation ball valves and flexible bellows.
- The units are coupled with bell housing and flexible drive couplings.
- Location Markers are provided for ease of re-assembly.
Hydraulic System
- The system is designed for the operating logic with multiple flow and pressure controls as desired.
- The system is designed with adequate care to ascertain the proper sizing and selection of components, taking into account the application and duty cycle.
- The tank is sized to take care of oil level fluctuation and heat dissipation.
- Systems are designed for energy conservation with the help of high–low circuits, accumulators, and variable delivery pump.
- Systems are designed to start on “No Load” and Idle running with Venting Facility.
- Systems are designed with Pilot Check valves in Pressure holding circuits, Reducing valves for separate Low-Pressure settings, Sequence valves and Pressure Switches for Sequencing circuits, Pressure Compensated Flow control valves for precise speed controls, Counter Balance valves for falling load support, Cartridge valves for high flows and smooth operation, Pressure Switches, Pressure Transducers, and Hose Burst valves for Safety as per the requirement of applications.
- Systems are also designed for closed-loop applications with Proportional valves for high accuracy and automation controls. Systems are also designed with Hydro – Static Drives.
- Compact Construction
- Reduction of tubing and number of leakage points
- Improve the System stiffness and Performance
- Facilitate maintenance
Oil Filtration and Contamination Control
- Pump Suction is provided with 149-micron mesh-type strainers or filters as standard.
- Return lines are provided with 10 or 25-micron suitably sized filters as standard.
- Pressure line filters of 3, 5, and 10 microns with absolute beta rating better than 200 are provided if required.
- Continuous off-line filtration systems are also provided if desired.
- Magnetic Tank cleaners suspended inside the tank are also provided if required.
- Manifold blocks are initially deburred and cleaned, then they are heated at high temperatures to melt the low-mass metal particles and blackbodies. They are cleaned with high-pressure kerosene before assembly.
- Tubes are also burnt at high temperatures to melt low-mass metal particles and then zinc passivated.
Oil Cooling
- Firstly, tanks are sized suitably to provide natural cooling to maintain oil temperature below 15° C above ambient.
- If the natural cooling is not sufficient, then additional water-cooled or air-cooled heat exchangers are provided in the systems. These are either water-cooled shell and tube type / plate type or air cooled radiator type coolers.
- Tank-submersed heat exchangers are also provided as a special case.
- Continuous off-line cooling systems are also provided if desired.
