User manual FLUKE OPG1

[. . . ] OPG1TM Hydraulic Pressure Generator/Controller Operation and Maintenance Manual © 1998-2007 DH Instruments, a Fluke Company OPG1TM OPERATION AND MAINTENANCE MANUAL High pressure liquids and gases are potentially hazardous. Energy stored in these liquids and gases can be released unexpectedly and with extreme force. High pressure systems should be assembled and operated only by personnel who have been instructed in proper safety practices. © 1999-2007 DH Instruments, a Fluke Company All rights reserved. Information in this document is subject to change without notice. [. . . ] The DRIVE SET regulator (1) is used to set the pneumatic drive pressure and thus the oil output pressure. The pump oil output is connected to the INLET valve (9). Opening the INLET valve connects the pump output to the test system causing the pump (2) to cycle, drawing oil from the tank as needed and pressurizing the system. Opening the OUTLET valve (8) returns oil to the tank (3), depressurizing the system. The second means of generating and adjusting pressure is the Pneumatically Driven Variable Volume (PDVV) (10) combined with the PDVV (+) valves (12) and PDVV (-) valves (11). This combination is used for smaller pressure changes and fine pressure control. The PDVV is a pneumatically actuated variable volume. A piston or plunger in a cylinder is exposed to the oil pressure. The other end of the plunger is connected to a dome loaded pneumatic actuator. Changing the pneumatic pressure on the dome loaded actuator causes the plunger to move, increasing or decreasing oil pressure. A spring returns the plunger to its minimum stroke position when there is no pressure on it. A mechanical system tracks movement of the plunger and an indicator (17) displays the plunger position on the front panel. The PDVV (+) valves (12) and PDVV (-) valves (11) are momentary, poppet valves that open when pressed. The (+) valves (12) admit drive air pressure to the PDVV actuator causing the PDVV piston to move forward compressing the oil and increasing the pressure. The (-) valves (11) have the opposite effect causing pressure to decrease. Page 19 © 1998-2007 DH Instruments, a Fluke Company OPG1TM OPERATION AND MAINTENANCE MANUAL 21 21 Pump Drive Air Set Regulator Hydropneumatic Pump Tank Top TEST Connection Oil Return Overflow Tube Right Side TEST Connection Left Side TEST Connection Test Outlet Valve Test Inlet Valve Pneumatically Drive Variable Volume (PDVV) 11. Fast and Slow PDVV Decrease Valves 12 Fast and Slow PDVV Increase Valves 1. 10. PDVV DRIVE Air Connection Common DRIVE Air Connection DRIVE Air Filters PUMP DRIVE Pressure Gauge PDVV Plunger Position Indicator PDVV DRIVE Pressure Gauge DRIVE to PDVV Common Connection (optional with PDVV DRIVE to PDVV Independent Connection not used) 20. PDVV DRIVE to PDVV Independent Connection (as delivered) 21. System Schematic © 1998-2007 DH Instruments, a Fluke Company Page 20 3. GENERAL OPERATION 3. 2 OPERATIONAL FUNCTIONS All OPG1 operational functions are accessed from the instrument front panel. Sections 3. 2. 1 to 3. 2. 6 detail the various functions. 1. 8. PDVV Drive Air/Test Oil Pressure Gauge PDVV Piston Position Indicator Pump Drive Air/Inlet Oil Pressure Gauge Pump Drive Air Set Regulator Test Inlet Valve Knob PDVV Increase Fast and Slow Buttons PDVV Decrease Fast and Slow Buttons Test Outlet Valve Knob Figure 8. [. . . ] Used to generate pressure and for rough pressure adjustment. Progressive, half-turn, needle valve used to return oil from the test system to the oil tank. Used to release pressure and for rough pressure adjustment. A pneumatically actuated plunger in a cylinder used to increase and decrease the volume of the oil test system and provide fine adjustment of the test pressure. [. . . ]