Soosan SB121 - Inspection and Charging of N2 gas in Accumulator; N2 Gas Accumulator Inspection; Charging N2 Gas into Accumulator

Soosan H
y
draulic Breaker
Soosan Heav
y
Industries Co.
,
Ltd
9. Inspection and Charging of N
2
gas in Accumulator
Take special care to handle and store the N
2
gas cylinder as it is high pressurized
Use nitrogen gas only.
When disassemble the accumulator, must discharge N
2
gas before working.
Do not touch on the accumulator surface when working.
Be sure to use the 3 way valve assembly for charging the N
2
gas if charging gas leaks directly from the
cylinder, diaphragm may be broken off.
If charging for handling N
2
gas to only the accumulator, make sure that the accumulator body and cover
are tightened fully.
Standard accumulator gas pressure 55㎏/㎠ (783psi) on the accumulator surface temperature at
20 (68 )℃℉
See “CONVERSION TABLE FOR CHARGING N
2
GAS PRESSURE TO BACK HEAD”
■ Inspection of N
2
gas Accumulator.
1) Make sure if the cap and valve of the 3-way valve assembly(5) are fully tightened.
2) Remove the cap(11) from the accumulator and tighten the charging valve (12) fully.
3) Check if O-rings(6)(8) are installed to the bushing(7). Remove the plug(9) and screw the bushing.
4) Install the bushing(7) to the 3-way valve assembly(5).
5) Loosen the charging valve(12) gradually. The charging pressure is indicated on the pressure gauge.
6) Close the valve clockwise when the gas pressure is normal. If the gas pressure is higher, repeat
loosening and tightening the relief valve of 3-way valve assembly. The pressure is lowered gradually.
7) Loosen the relief valve of the 3-way valve assembly to discharge the N2 gas in the 3-way valve
assembly(5).
8) Remove the 3-way valve assembly(5) and tighten the plug(9) and cap(11).
■ Charging of N
2
gas into Accumulator
1) Connect the charging hose(4) to N2 gas cylinder(1) after screwing the bombe adapter(3) onto adapter,
nut(2) and installing to the N2 gas cylinder.
2) Connect the 3-way valve assembly(5) to the charging hose(4) after unscrewing the cap on the 3-way
valve assembly.
3) Remove the cap(11) form the accumulator and tighten the charging valve(12) fully.
4) Check if O-rings (6)(8) are installed to the bushing(7). Remove the plug(9) and screw the bushing.
5) Loosen the accumulator charging valve(12) after checking if bushing(7) is installed to the 3-way valve
assembly.
6) Turn the handle of the N2 gas cylinder counter clockwise slowly to charge gas.
7) Charge gas in accordance with the conversion table for charging N2 gas pressure to accumulator.
8) Turn the handle of the N2 gas cylinder clockwise to close the cock.
9) Close the accumulator charging valve(12).
10) Loosen the relief valve of the 3-way valve assembly to discharge the N2 gas remaining in the
charging hose.
11) Remove the charging hose, 3-way valve assembly and bushing and tighten the plug(9) and cap(11).
WARNING