OPG1™ Operation and Maintenance Manual
Page
37
©2000
DH Instruments, Inc
.
G
G
L
L
O
O
S
S
S
S
A
A
R
R
Y
Y
,
Fast
and slow
,
PDVV (-) valves
. Used to decrease pressure and
for fine pressure adjustment.
,
Fast
and slow
,
PDVV (+) valves
. Used to increase pressure and
for fine pressure adjustment.
CW
Clockwise
CCW
Counter-clockwise
Collar
The DH500 fitting element that is threaded onto the tube and provides a
surface for the gland to push against.
DH500
High pressure, gland and collar type fitting for 1/4 in. (6mm) coned and
left hand threaded, stainless steel, tubes. DH500 is equivalent to AE
F250C, HIP HF4, etc.
DRIVE SET Regulator
Self venting regulator used to regulate the drive air (pneumatic power) to
the hydropneumatic pump. Sets maximum inlet pressure.
DUT
Device or System Under Test. The device that is connected to OPG1 to
be tested or calibrated.
Gland
The “jam nut” in a DH500 fitting that pushes the collar on the tube into the
seat.
Hydropneumatic
Pump
Pneumatically operated, gate valve controlled, piston pump used to
supply high pressure oil to the
INLET valve
.
INLET Valve
Progressive, half-turn, needle valve used to admit oil from the
hydropneumatic pump into the test system. Used to generate pressure
and for rough pressure adjustment.
OUTLET Valve
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.
PDVV (Pneumatically
Driven Variable
Volume)
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.