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Hydraulic Power Units STANDARD HYDRAULIC POWER UNITS NV - VERTICAL STYLE POWER UNIT NH - HORIZONTAL STYLE POWER UNIT NSP STYLE POWER UNIT Table of Contents NV VERTICAL STYLE POWER UNIT....................................................................Page General Information...................................................................................................................................3 Technical Information - Table “A” & “B”.................................................................................................4 How-to-Order - Reservoir.............................................................................................................................5 How-to-Order - Manifold..............................................................................................................................6 Unit Specification Work Sheet..................................................................................................................7 Hydraulic Schematics.................................................................................................................................8 Unit Drawing..........................................................................................................................................9-10 Manifold Dimensional Information.........................................................................................................11 Optional Component Information and Bolt Kit Model Numbers.........................................................12 NH HORIZONTAL STYLE POWER UNIT..............................................................Page General Information.................................................................................................................................13 Technical Information - Table “A” & “B”...............................................................................................14 How-to-Order - Reservoir..........................................................................................................................15 How-to-Order - Manifold ..........................................................................................................................16 Unit Specification Work Sheet................................................................................................................17 Hydraulic Schematics..............................................................................................................................18 Unit Drawing.............................................................................................................................................19 Unit Dimensional Information..................................................................................................................20 Air/Oil Return Information / Optional Component Information and Bolt Kit Model Numbers..............21 NSP & NSP-L STYLE POWER UNIT.....................................................................Page General Information.................................................................................................................................22 How-to-Order ............................................................................................................................................23 Unit Dimensional Information............................................................................................................24-27 UVN Uni-Pump and Power Unit Combinations..................................................................................28, 29 Motor Selection Method and Performance Characterisitcs............................................................30, 31 2 Vertical Power Units NACHI Standard OPTIONAL ACCESSORIES CAPACITIES: Vertical Hydraulic INCLUDE: Reservoir capacities available from 5 Aluminum parallel directional control gallon to 30 gallons (specials upon Power Unit manifolds with cartridge relief valve in request). Reservoir capacities vs. pump "D03" and "DO5" sizes with AC or DC flow can vary depending on specific NACHI Standard Vertical Hydraulic Power voltage. applications. Generally a 2:1 reservoir to Units offer standard systems complete Return Line Filter w/Dirt Indicator. pump ratio is acceptable. Pressures at with: Pressure blocks with #8SAE & 12SAE specific pump flow will determine the • Reservoir, Pump, Pump Motor Adaptor, connection with relief or compensator hydraulic horsepower required. Refer to Electric Motor, Flexible Coupling, control. "TABLE A", page 6. Pressure Control Relief Valve for Gear Pressure and flow control modular valves QUALITY: Pumps. in "DO3" and "DO5" sizes. Quality components and high • Remote Compensator for Pressure Air/Oil cooler for case drain cooling of manufacturing standards make these Compensated Piston or Vane pumps. compensated pumps. factory assembled units fit virtually any • Pressure Gauge w/Shut Off, Air NOISE LEVELS: application. The wide variety of pumps, Breather/Filter Combination, Sight motors, reservoirs, manifolds and Noise levels are well below the 90db (a) choice of options enable you to match Gauge w/Thermometer, Drain Plug, specified under the WALSH-HEALY ACT. Pressure and Return Connections, your application requirements for Suction Strainer w/3PSI By-Pass (except STANDARD UNITS: optimum productivity and Cost-Effective on 5 gallon) and check valve. Standard units can be ordered using the operation. simple model codes. Optional selections RELIABILITY: can be obtained with the same codes Strict control of accepted hydraulic (see "How To Order", page 8). Custom assembly practices, testing procedures, units can be manufactured using plus high quality components assure standard unit components. successful operation in a variety of industrial applications. LOW COST: Production line assembling, combined with minimal piping offers compact systems at low cost. Note: Nachi’s policy of constantly improving its products, specifications are subject to change without notice. 3 Vertical Power Units Operating Instructions Most foreign material and contaminents Pressures shown will load AC electric Fill reservoir with new premium grade will be trapped by the return line filter motors to their nameplate horsepower hydraulic fluid (Mobil DTE26 or equal). It after a few hours of operation. The return rating. Pressures shown should not be is highly recommended to filter all line filter element should be replaced exceeded when system must be started hydraulic fluid before filling the reservoir. when gauge indicates. (See pg. 8 for at full pressure. Momentary pressures Fluid level gauge will indicate proper spare element numbers). Most industrial higher than those listed can be applied if level. Electric motor wiring must conform applications should operate at a sufficient operating time at lower pump to the motor wiring nameplate. Jog motor temperature below 140 degrees pressure or lower motor load during the to check proper rotation, indicated by the fahrenheit. At higher temperatures, cycle will provide for motor cooling. Dead rotation arrow on the unit. Incorrect problems are often experienced in head pressure loading would require full rotation can be reversed by interchanging maintaining reliable and consistent motor HP using a constant displacement any two lines on a three phase motor. hydraulic control. Component service life gear pump. Dead head pressure with a is also reduced and hydraulic oil pressure compensated Piston or Vane Relief or compensator control valve deteriorates. If the system tends to pump would require a small percentage should be set at lowest pressure setting operate at an elevated temperature of the full flow loading, consequently for startup. Decrease pressure by turning level, steps must be taken to reduce this generating less heat. Actual HP require- the adjusting screw counterclockwise. If elevated operating temperature. ments depend on the duty cycle and pump does not prime, vent pump operating conditions. This is many times pressure line to atmosphere and into an Once a year or every 4000 hours of operation, the reservoir's air breather best determined by actual testing by the open container to establish flow. After customer. pump has primed, reconnect pressure filter and the suction strainer should be line and run at lowest pressure setting to replaced. The reservoir oil should be The components and piping are designed purge air from the system piping. drained, and the reservoir cleaned. for the use of petroleum base fluids. Recheck the fluid level in the reservoir, as Dusty or contaminated environments some fluid could be lost in the filling of may require more frequent cleaning and piping and components. maintenance. THEORETICAL PRESSURE TABLE (PSI) Table “A” Table “B” GPM HORSEPOWER REQUIREMENTS ▲ ORDERING THEORETICAL DISPLACEMENT 1 1.5 2 3 5 7.5 10 15 20 CODE FLOW (GPM) CU IN/REV GEAR PUMPS GEAR PUMPS 1.6 1071 1607 2143 * G/1.6 1.63 0.21 2.4 714 1071 1428 2143 * G/2.4 2.41 0.31 3.0 571 857 1143 1714 2857 * G/3.0 3.03 0.39 5.2 494 659 989 1648 2472 * G/5.2 5.22 0.67 7.0 367 490 735 1224 1836 2449 * G/7.0 7.09 0.91 9.0 381 571 952 1428 1904 2857 * G/9.0 9.03 1.16 10.4 494 824 1236 1648 2472 * G/10.4 10.44 1.34 12.3 418 697 1045 1393 2090 * G/12.3 12.38 1.59 PISTON PUMPS PISTON PUMPS 3.8 451 677 902 1353 2255 * P/3.8 3.80 0.49 7.8 220 330 439 659 1099 1648 2197 * P/7.8 7.80 1.01 10.5 163 245 326 490 816 1224 1632 * P/10.5 10.50 1.34 VANE PUMPS VANE PUMPS 7.9 325 434 651 1085 1627 * V/7.9 7.90 1.02 10.5 245 325 490 816 * V/10.5 10.50 1.34 14.2 241
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