Ravebo is since the sixties the authorized Sales and Service agents for the Japanese based valve and fluid control systems manufacturer, Nakakita Seisakusho Ltd. The company offers several type of products which include: Automatic control valves, (which also include auto actuated valves), remote control valves, safety valves, cylinder valves, servo actuated control valves, air purge automatic regulatory actuators, valves for nuclear plants, superheated steam pressure reducers, other special control valves, controlling equipment, butterfly valves (manual and remote control butterfly valves), and low-temperature use butterfly valves for cargo handling, ballast remote controllers, remote water level indication.

Nakakita is also manufacturing automatic temperature and pressure indicating controllers for example the popular model types NSP732 and the NST732. These controllers can be applied to all possible fields of process control such as, pressure, differential pressure, temperature, liquid level, flow rate, viscosity etc. when used in combination with diaphragm control valves at the operating end. These pneumatic controllers hardly need maintenance and are long lasting. Along with the soaring fuel prices in the recent years, measures against degrading fuel used for ships have been drawing world’s attention. Nakakita addressed this situation by developing the Visco Transmitter unit as a measure against degrading fuel. The NS777C series capillary type Visco Transmitter has proven performance over the past 20 years and has gone through numerous upgrades and improvements such as elimination of the pulsating pressure noise generated by the injection pump of diesel engines while employing a double gear pump system.

 

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3 Way Mixing Control Valve

3 Way Mixing Control Valve
This Control valve DY-M is mainly used for temperature control of cooling water fed to large-size diesel engine as it has larger capacity than the model DY-T. The construction is simple with a small number of components. It's a rotary plug type 3-way valve where the flow channel is altered by turning the valve plug. For handling corrosive fluids like sea wa... [Lees meer]

Automatic Indicating Controller

Automatic Indicating Controller
This controller can be applied to all possible detection fields of process control such as pressure, differential pressure, temperature, liquid level, flow rate, viscosity etc. when used in combination with diaphragm control valves at the operating end. It is a pneumatic controller which can automatically regulate various process conditions at the optimum le... [Lees meer]

Cage Type Control Valves

Cage Type Control Valves
Control valve with cavi-cage This control valve is equipped with trim-exchangeable multiport cage. It is used to prevent erosion of the body and trim. In boiler feed water control valves, etc., the pressure drop at start-up or during low load running may become excessive and come into the range of cavitation generation. It reduces the service life of the bo... [Lees meer]

Control Valves

Control Valves
Features Nakakita control valves have been adopted as optimum products of high quality for services ranging from high temperature & high pressure to cryogenic temperature & vacuum in al1 types of industrial facilities such as nuclear power, thermal power, iron and steel making, chemical plants and ships.The valves are designed with high level techni... [Lees meer]

NS-C Butterfly Valves

NS-C Butterfly Valves
Butterfly valves have a long history, yet they are used more and more in new applications. At present, the demand for butterfly valve is increasing rapidly. The reason lies in it’s simple structure (see figure 1.) and the economic merit of small piping space requirement. The merit of high reliability can be also added, as is indicated in the outstanding... [Lees meer]

Pressure / Temperature Controller

Pressure / Temperature Controller
The measured value detected as a displacement of the spiral Bourdon tube is indicated on the scale, and at the Same time, it is converted into a pneumatic pressure signal of 0.2 to 1.0 kgf/cm2 to be transmitted. Specifications Ranges of spiral Bourdon tube pressure measuring element: 0 - 3, 5, 10, 15, 20, 25, 30, 50, 100 kgf/cm2 - 76 cmHg - 3,4, 5 kgf/... [Lees meer]

Positioner

Positioner
A positioner is installed on a diaphragm type or cylinder type actuator to improve the operating characteristics of the control valve. The positioner drives the control valve, coping with the frictional resistance of gland packing and unbalanced force on the plug which prevent the movement of thy valve stem, till the valve travel corresponding to the input p... [Lees meer]

Safety Valves

Safety Valves
With concentrated efforts, by constantly developing new techniques, furthering quality assurance of improved products and making it our motto to produce safety valves which guarantee full satisfaction of every customer, Nakakita vigorously has been striving toward safety of various plant facilities.As an authorized manufacturer to use the ASME Code stamp, t... [Lees meer]

Viscosity Transmitter Unit

Viscosity Transmitter Unit
Along with the soared fuel price in recent years, measures against degrading fuel used for ships have been drawing world's attention as a part of energy-saving. The practical applications have been advanced step by step and 6000 sec RW No.1 as the target fuel in the years to come. NS777C (Viscosity-Transmitter Unit) developed this time as a measure against d... [Lees meer]

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