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. No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of DH Instruments, a Fluke Company 4765 East Beautiful Lane Phoenix AZ 85044-5318 USA. [. . . ] OPG1 must ride on its four feet - NOT on the internal components. Page 17 © 1998-2007 DH Instruments, a Fluke Company OPG1TM OPERATION AND MAINTENANCE MANUAL NOT E S © 1998-2007 DH Instruments, a Fluke Company Page 18 3. GENERAL OPERATION 3. 3. 1 GENERAL OPERATION OPERATING PRINCIPLE Numerical references in this section refer to Section 3. 1, Figure 7. OPG1 is a self-contained system designed to generate and adjust pressure from atmosphere (zero gauge) to 200 MPa (30 000 psi) into static pressure test and calibration systems. OPG1 combines the capability to fill a system with oil and execute large pressure changes very rapidly with very fine pressure adjustment around a point. The first means of generating and adjusting pressure is the hydropneumatic pump (2) combined with the oil tank (3), DRIVE SET regulator (1), INLET valve (9) and OUTLET valve (8). This combination is used for filling the system under test, large pressure changes and rough pressure control. The valves are Belleville spring loaded, highly progressive, half-turn needle valves. The pump is a pneumatically powered, gate valve controlled, piston pump similar to a double-acting pneumatic cylinder. There is a ratio of 400:1 between the pneumatic piston and hydraulic plunger. The pump will operate continuously until the pneumatic drive pressure on the pneumatic piston is in equilibrium with the oil pressure on the oil plunger. For example, if the pneumatic drive pressure is 500 kPa (75 psi), the pump will cycle until the oil pressure reaches 200 MPa (30 000 psi). The DRIVE SET regulator (1) is used to set the pneumatic drive pressure and thus the oil output pressure. 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 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. [. . . ] Clockwise Counter-clockwise The DH500 fitting element that is threaded onto the tube and provides a surface for the gland to push against. Self venting regulator used to regulate the drive air (pneumatic power) to the hydropneumatic pump. The "jam nut" in a DH500 fitting that pushes the collar on the tube into the seat. Pneumatically operated, gate valve controlled, piston pump used to supply high pressure oil to the INLET valve. [. . . ]