Over flow pipe is the part of relief valve,
Constant pressure Overflow effect: the quantitative pump throttle system, the quantitative pump to provide a constant flow. When the system pressure increases, the traffic demand will decrease. At this point relief valve open, so that excess flow back to tank overflow, inlet pressure relief valve to ensure that the pump outlet pressure constant (often with the pressure fluctuations valve port open).
Photo of our Overflow:
The role of regulator: the way back to the oil spill in series, back pressure relief, increased steadily moving parts.
Unloading systems: remote port relief valve in series with the solenoid valve spill small flow when the solenoid is energized, the relief valve remote control port to tank, then pump unloading. In this case as unloading relief valve.
A security role: when the system is working properly, the valve closes. Only the load exceeds a predetermined limit overflow opening (system pressure exceeds the set pressure), the overload protection, the system pressure does not increase (usually makes the set pressure relief valve system maximum operating pressure higher than 10% to 20% ).
Usually there are practical applications: for unloading valve, pressure regulator for the remote, for high and low pressure multi-stage control valve for sequence valve, used to generate back pressure (string in the oil return path).
There are two general relief structure: 1, direct acting relief valve. 2, pilot relief valve.
The main requirement for relief valve: regulating range, small deviations regulator, pressure runout small, sensitive, large overload capacity, low noise.
High accuracy, fully welded, painted construction can be used for trailing suction hopper Dredger.
Load pipe plays an important role, transport the dredge mixture to the hopper, then transmit through the load box pipe, to other position.
B. Construction and procedure
The construction is to be built according to the drawing with rules of good workmanship.
With wear plate welded in inlet tube to ensure the long service life
According to the different function, normally load pipe has 1 inlet tube or 2 inlet tubes
On main pipe part, there will be several exit holes.
All fabricated steelwork used in the construction of the load box pipes will be to manufacturing standard of normal or classification society.
All materials proposed will be selected to comply with the latest Health and Safety Rules.
Paint systems for hull protection will be of the highest quality (Hempel, Inter, Sigma, Jotun)
All welding will be performed in accordance with drawing and order and UniSite experience and all welding will be continuous and full penetration.
The workmanship have good marine practice. Care are taken to ensure fair lines, smooth surfaces and neat welding.