HYDRAULIC SCHEMATIC.pdf
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- Attached to
- HYDRAULIC POWER UNIT
- Solicitation number
- FA822725Q4551
About this file
The document is a detailed hydraulic schematic diagram for a Hydraulic Power Unit (HPU), illustrating a complex system with multiple technical components and specifications. The schematic includes 26 numbered components such as a pump/motor capable of delivering 10 GPM and 3000 PSI, pressure relief safety valves (set at 3250 PSI and 150 PSI), forced air cooling fan/heat exchanger, digital thermostatic heater, flow meters, 3-way valves, accumulator, hydraulic tank reservoir (10-40 gallon capacity), and full port ball type isolation valves. Key technical requirements include maintaining fluid temperature at 130 +/- 5 degrees F, controlling fluid flow rates, managing pressure surges, and enabling specific testing procedures like flush and proof tests with precise pressure and flow limitations.
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NOTES:
1. FILTER, SPIN-ON TYPE, CAPABLE OF 10 GALLONS PER MINUTE (GPM) WITHOUT IMPEDING
HYDRAULIC MOTOR (UNIT UNDER TEST, UUT) FLOW AND PRESSURE REQUIREMENTS.
2. PRESSURE REGULATOR WITH GAUGES BEFORE AND AFTER, THIS IS TO ENSURE PRESSURE
REQUIREMENT OF 3000PSI MINIMUM.
3. FLOW METER TO MEASURE 0-11 GPM FLOW RATE (AND VERIFY HPU SATISFIES FLOW
REQUIREMENT OF 10 GPM AT 3000 PSI MINIMUM).
4. NEEDLE FLOW CONTROL VALVE, USED TO CONTROL FLOW OF FLUID. WIDE OPEN SHALL
ENABLE 10GPM AT 3000 PSI ACROSS MOTOR PORTS.
5. 4 WAY VALVE; MANUAL, USED TO SWITCH PRESSURE AND RETURN LINES WHICH IN TURN
CHANGES THE DIRECTION OF MOTOR ROTATION.
6. PRESSURE GAUGES, 0-5000 PSI, 0.1% FULL SCALE (FS) ACCURACY OR BETTER. THESE WILL
BE MOUNTED AS CLOSE AS POSSIBLE TO THE UUT TO MEASURE PRESSURE DROP ACROSS
MOTOR.
7. PRESSURE GAUGE, 0-5000 PSI, 0.02% FS ACCURACY OR BETTER. THIS WILL ENSURE
PROPER PRESSURE OUTPUT IS ACHIEVED FOR PROOF TEST (150 PSI) AND MOTOR RUN
TESTS.
8. PRESSURE GAUGE 0-200 (+300/-0) PSI. 0.1% FS ACCURACY OR BETTER.
9. ADJUSTABLE BACK PRESSURE REGULATOR, ABLE TO ADJUST FROM 0 PSI TO 200 PSI (FOR
HOLDING BACK PRESSURE ON MOTOR, 15-50 PSI WHILE RUNNING, AND 150 PSI TO PROOF).
10. BACK PRESSURE REGULATOR, SET TO 10 PSI (TO KEEP MINIMUM 10 PSI BACK PRESSURE
REQ'D FOR UUT), CAPABLE OF 10 GPM, 20PSI PRESSURE DIFFERENCE MAX
11. THREE WAY VALVE TO DIVERT UUT CASE LEAKAGE TO MEASURE FLOW RATE MANUALLY.
12. PRESSURE RELIEF SAFETY VALVE SET AT 3250 PSI +/-50 PSI.
13. FORCED AIR COOLING FAN/HEAT EXCHANGER TO COOL FLUID (MAINTAIN TEMPERATURE AT
130 +/-5 DEGREES F). DIGITALLY CONTROLLED.
14. HEATER, ELECTRICAL ELEMENT, DIGITAL THERMOSTATIC CONTROL AND DISPLAY (MAINTAIN
TEMPERATURE AT 130 +/- 5 DEGREES F).
15. SMALL NEEDLE CONTROL VALVE TO THROTTLE FLOW TO UUT CASE FILL PORT FOR
FLUSHING.
16. PRESSURE SAFETY RELIEF VALVE SET AT 150 PSI +/- 2.5 PSI.
17. ACCUMULATOR TO DAMPEN PRESSURE SURGES. ACCUMULATOR VOLUME ~10 CUBIC
INCHES.
18. DESICCANT VENT.
19. HYDRAULIC TANK RESERVOIR, 10-40 GALLON CAPACITY.
20. TANK FILL PLUG, AIR TIGHT, AT LEAST 1.25 INCH DIAMETER.
21. DRAIN, WITH VALVE AND THREADED HOSE ATTACHMENT.
22. PUMP/MOTOR, CAPABLE OF DELIVERING 10 GPM AND 3000 PSI TO UUT. ENSURE PRESSURE
DROP IN THE SYSTEM AT 10 GPM WILL NOT COMPROMISE PRESSURE REQUIREMENT AT
UUT.
23. FLOW METER 0-100 CUBIC INCHES PER MINUTE TO OBSERVE "ABRUPT INCREASE IN CASE
DRAIN FLOW". FLOW LIMIT THRESHOLD IS 41 CUBIC INCHES PER MINUTE.
24. 3 WAY VALVE TO SWITCH BETWEEN 150 PSI PRESSURIZATION OF THE CASE FILL PORT (FOR
FLUSH TEST) OR PRESSURIZING THE CASE DRAIN PORT (FOR PROOF TEST AND FOR
FILLING CASE BY VENTING AIR OUT OF CASE FILL PORT WHILE DRAIN IS UNDER PRESSURE).
25. PUMP SUCTION INTAKE SCREEN.
26. FULL PORT BALL TYPE ISOLATION VALVES.
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CASE DRAIN PORT
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CASE FILL PORT
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