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B.
Isolated Pressure Leak Test
For tighter control of pressures,
WIDDER
Hydrostatic Pressure Test Systems® include a
secondary high-pressure Isolation Valve. This valve is downstream from the pressurizing pump
and allows the operator to isolate the pressurized test loop from the pump check valves. At high
pressures, the pump check valves can leak some system pressure. Usually, this is well within test
pressure drop parameters (API 6A on annex F.1.1.10 b. for example, states: “Pressure shall
remain within 5% of the test pressure or 3,45 MPa (500 psi), whichever is less, during the test
period.”)
1.
To isolate pressure, follow section A until system is pressured to desired pressure.
2.
Close the Isolation Valve.
Closing the isolation valve may raise test pressure
slightly as the isolation valve displaces fluid in the system.
3.
Once the isolation valve is closed, the test area is isolated from the pump and check
valves.
4.
Monitor pressure gage for drop in pressure over allotted time.
5.
When test is complete, be sure to turn off input air, open regulator completely, crack
bleed valve and re-open isolation valve. Do not store system under pressure- always be
sure bleed valve is cracked and isolation vale is open.
C.
System Shut Down and Storage
1.
Once tests and inspections are complete, shut down the system by first opening the
regulator to relieve air pressure (counter clock-wise) until gage reads “0”.
2.
Turn off water and air input.
3.
Gently crack the needle bleed valve until output pressure drops to “0”.
4.
Once all pressure gages read “0” and inputs are off, drain and disconnect test vessel.
5.
To store unit, add a small amount of water displacing oil to the water input and hook-
up an airline to the water input.
6.
With all needle valves open, blow air through the water input. Water and air will come
out the discharge side of the unit.
7.
Blow off until mostly dry.
D.
Digital Gage
The
WIDDER
Hydrostatic Test Systems® C Series are supplied with a digital gage. This gage
is accurate to .025% full scale and detects even tiny changes in test conditions. See enclosed
manual for gage use. Because
WIDDER
Hydrostatic Test Systems® are so accurate and can
read down to a 1.0 PSI change in system pressure, the operator must be aware that minor
pressure changes are caused by many factors including: temperature fluctuation, hose stretch,
sealant settling, and material assembly movement. Vessel size is critical to this issue; a small test
vessel will show dramatically more pressure change than a large one. (Note: For long term
storage, remove batteries to extend life.)
Содержание HPIC-10000-D-HV
Страница 4: ...WWW WIDDERTOOLS COM 4 203 777 5395 WIDDER HPIC Hydrostatic Test Pump Front View...
Страница 5: ...WWW WIDDERTOOLS COM 5 203 777 5395 Back Panel View...
Страница 6: ...WWW WIDDERTOOLS COM 6 203 777 5395 Inner Air System...
Страница 7: ...WWW WIDDERTOOLS COM 7 203 777 5395 Small High Pressure System...
Страница 8: ...WWW WIDDERTOOLS COM 8 203 777 5395 Main Water In Out System...
Страница 9: ...WWW WIDDERTOOLS COM 9 203 777 5395 High Flow Bypass System...
