Temperature Control Valve for Main Engine Cooling FW, consist of:
Automatic Controller:
a. Filter Regulator for Automatic Controller
Data sheet:
- Branch : Nakakita Seisakusho
- Type : NS 770C
- Connection : PT1/4
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| Filter Regulator for Automatic Controller |
- Inlet Press. : 10 kg/cm2( max)
- Outlet Press.: 3kg/cm2 (max)
- Inspection results:
· Normal condition. When given the pressure of 8 kg/cm2 still can be set between 0-3 kg/cm2.
· Tubing connections are still good.
b. Automatic Controller
Data sheet:
- Branch : Nakakita Seisakusho
- Type : NST 732
- Air Sup. Press.: 1,4kg/cm2
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| Automatic Controller |
Control Pressure : 0,2 – 1,0 kg/cm2
- Scale Range : 0 – 150kg/cm2
- Inspection Result:
· Scale pointer is not appropriate,
· Tubing connections are still good,
· Not release the pressure on the outlet when in put pressure on the inlet pressure signal up to 8 kg/cm2.
2. Control Valve:
a. Control Valve Section
Data sheet:
- Branch : Nakakita Seisakusho
 |
| Control Valve Section |
Type : 855DA
- Range air sup.: 0,2 – 1,0kg/cm2
- Inspection Result :
· Linkage pointer and scale corrosion,
· Still be working at the time of the diaphragm inlet pressure in the range 0,2 - 1.0 kg/cm2,
b. Positioner Valve Section
- Branch : Nakakita Seisakusho
 |
| Positioner Valve Section |
Type : NS 737 S- D
- Supply Pressure : 1,4 kg/cm2
- Outlet Pressure: 0,2 – 1kg/cm2
- Inlet Pressure : 0,2 – 1kg/cm2
· Supply Pressure Gauge
a) Branch : NKS
b) Range Pressure: 0 – 3kg/cm2
c) Connection Diameter: ¼”
d) Type Connection : Side Connection
e) Face Diameter : 1,5”
f) Condition: not calibrated
· Outlet Pressure Gauge
a) Branch :NKS
b) Range Pressure: 0 – 2kg/cm2
c) Connection Diameter: ¼”
d) Type Connection: Side Connection
e) Face Connection: 1,5”
f) Condition: not calibrated
· Inlet/ Signal Pressure gauge
a) Branch : NKS
b) Range Pressure: 0 – 2 kg/cm2
c) Connection Diameter: ¼”
d) Type Connection: Side Connection
e) Face Diameter: 1,5” Condition: not calibrated
Work has been done:
1. Function test Valve Diafragm,
Result:
- Still be working at the time of the diaphragm inlet pressure in the range 0,2 - 1.0 kg/cm2(directly, without using the automatic controller),
- Scale designation on control valve at position 0% - 100% or close and open, given the current pressure 0,2 - 1,0 kg / cm2,
- No reaction when using the automatic controller,
2. Automatic Controller Test function
Result :
- Because the scale is not appropriate designation / damaged on the Automatic Controller can not be accurately test,
- Provide input on the filter regulator air pressure and normal work,
3. Positioner Test Function
Result :
- Normal state at the time given the pressure on the supply pressure and produces a regular outlet pressure,
- Put pressure on the signal still with manual pressure regulator kompressore using filters in the range 0-1 kg / cm2,
Not to use the automatic control because it does not guarantee the accuracy of the pressure value which caused inaccuracy scale designation.