4
Use whenever sudden pressure drops are
anticipated (such as when testing vessels to
destruction).
Install gauge as shown in illustration 3. The shut-off
valve (Modelnr. 72-750) protects the gauge against
recoil damage when the test vessel ruptures. For
maximum protection, the shut-off valve should be
nearly closed during operation of the pump.
6.0 OPERATION
6.1 To Pressurize the System
Turn pump release valve to maximum clockwise
"closed" position (finger-tight). Operate the pump
handle until the desired system pressure is attained
or operation is completed.
NOTE: "Spongy" pump action indicates that there is
air in the pump or external hydraulic system.
6.2 To Relieve Pressure from the System
Turn pump release valve counterclockwise to "open"
position (approximately one turn).
WARNING: Check pressure gauge to be
sure system hydraulic pressure has
dropped to zero before attempting to
disconnect pump.
6.3 To Purge Air From the Pump
1. Open pump release valve (approx. one turn).
2. Loosen outlet port gland nut.
3. Close pump release valve.
4. Operate pump handle until air is expelled.
5. Torque outlet port gland nut to 67 Nm [50 Ft.lbs].
6. Check pump operation. Repeat above procedure
if necessary.
7. If pump action continues to feel "spongy", bleed
the external hydraulic system.
7.0 PRESSURE TESTING OF LARGE VESSELS
1. Install a tee (Modelnr. 43-300) and shut-off valve
(Modelnr. 72-750) as shown in Figure 4.
CAUTION: Install the shut-off valve so that
the flow arrow points away from the tee and
toward the fluid supply line so that the valve
inlet port will be subjected to the high test pressures.
See Figure 4.
2. Remove pump reservoir filler plug and fill pump
reservoir with test fluid.
3. To fill test vessel:
a. Turn the pump release valve to maximum
clockwise "closed" position (finger-tight).
b. Open fluid supply shut-off valve.
c. When test vessel is filled, close fluid supply
shut-off valve.
4. Operate pump until desired system pressure is
developed.
CAUTION: The fluid supply shut-off valve
must remain closed at all times during the
pressure test.
5. After test is completed, open pump release valve.
WARNING: Check pressure gauge to be
sure system hydraulic pressure has
dropped to zero before attempting to drain
test vessel or disconnect pump.
illustration 4 – Large vessel pressure test
Gauge
TeePump
Shut-Off
Valve
Fluid supply
line
Model
Number
11-100
11-400
Pressure
Rating
Type of
pump
10000 psi
700 bar
40000 psi
2800 bar
Single-
speed
Single-
speed
Usable Oil
Capacity
45 in
3
737 cm
3
45 in
3
737 cm
3
Oil Displacement
per Stroke
.152 in
3
2,49 cm
3
.038 in
3
0,62 cm
3
Piston
Diametre
.50 inch
12,7 mm
.25 inch
6,4 mm
Piston
Stroke
.780 inch
19,8 mm
.780 inch
19,8 mm
TABLE 1 – SPECIFICATIONS
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