Nakakita — hydraulic remote valve control
Hydraulic remote control ng mga balbula
Instruction book for Nakakita's hydraulic remote valve control: butterfly valves on the main engine lube oil and ballast lines carry hydraulic cylinder actuators operated from a control unit in the engine room. A hand pump supplies the pressure; a manually operated 4-way valve per valve directs the oil to open or shut, and in-line flow meters show the open/shut position. The book describes the system, each component (4-way valve, relief combination pilot check valve, self-seal couplings with air purge), the butterfly valves and actuators, troubleshooting, safety and gasket handling.
Mga maintenance procedure
Operating a remote valve
- At the control unit set the 4-way valve of the required valve to OPEN or SHUT. p. 4
- Work the hand pump lever back and forth until the in-line flow meter shows the valve has moved fully. p. 4
- Return the 4-way valve to neutral. p. 4
Before maintenance on a valve actuator
- Make sure the pipe is depressurised and the valve is below 40 °C. p. 49
- Isolate power to solenoids and limit switches and shut off the hydraulic/air supply. p. 49
- Before opening a spring actuator, slacken the adjusting screw so the spring reaches free length. p. 49
Mga maintenance interval
| Item | Kailan | Gagawin | Manual |
|---|---|---|---|
| Line pressure, gland and gasket leaks | daily | Check gauge, tighten gland or flange if leaking | p. 67 |
| Connection bolts | every 3 months | Check and tighten | p. 67 |
| Gaskets, packing and seat | 1–2 years or at dry dock | Dismantle, inspect, renew | p. 67 |
Mga sira at ang dapat gawin
Technical specifications
| Normal hydraulic pressure | 5.5 MPa (max 7 MPa, test 10.5 MPa) | p. 2 |
|---|---|---|
| Hydraulic oil | ISO VG 32 hydraulic oil (e.g. Shell Tellus 32, Mobil DTE 13M) | p. 3 |
| Valve stem | install horizontal where possible — vertical stems wear the lower bearing | p. 28 |
| Hot valve | do not touch above 40 °C without gloves | p. 49 |
Pinagmulan: manual ng gumawa na “EM-43-2 REMOTE CONTROL EQUIPMENT FOR M-E L.O AND BALLAST PIPE LINE”, 97 pahina. Ang numero ng pahina ay ayon sa orihinal. Suriin ang manual sa barko bago magtrabaho.
Awtomatikong isinalin ang pahinang ito. Ang part number, code at pahina ay ayon sa orihinal.