NAKAKITA PE2-3 Excess Steam Pressure Controller
Nakakita Seisakusho Co., Ltd.
Refurbished
The NAKAKITA PE2-3 Pressure Controller for Excess Steam is a marine pneumatic process-control instrument used for automatic pressure regulation in shipboard steam and boiler-related applications.
The unit shown is manufactured by Nakakita Seisakusho Co., Ltd., Japan, a long-established manufacturer associated with marine automatic control valves, controllers and valve remote-control equipment. Industry documentation for Nakakita lists both pneumatic and electrically driven automatic control equipment for ships and offshore applications.
The photographed controller clearly shows:
Manufacturer: NAKAKITA
Equipment: Pressure Controller for Excess Steam
Type / Application Marking: PE2-3
Indicating Range: 0–15 kgf/cm²
Control Principle: Pneumatic / mechanical process control
Marine Application: Steam / boiler pressure control
Country of Manufacturer: Japan
The PE2-3 is designed around the traditional marine pneumatic-control principle.
A pressure controller continuously senses process pressure, compares that condition with the desired setting and produces a pneumatic control signal that can operate a control valve.
In a typical excess-steam application, the basic control loop can be represented as:
Steam Pressure → NAKAKITA Pressure Controller → Pneumatic Control Signal → Control Valve → Steam Pressure Regulation
Closely related NSPS-732 examples are documented with 140 kPa instrument-air supply and 20–100 kPa control pressure, although the exact internal specification of an individual PE2-3 should always be verified from its own identification data.
This is where the product becomes particularly interesting for marine spare-parts buyers.
Nakakita's automatic indicating controller design is not limited only to steam pressure.
Published technical material describes applications covering:
Pressure • Differential Pressure • Temperature • Liquid Level • Flow Rate • Viscosity
when the controller is used with an appropriate sensing arrangement and diaphragm control valve.
This means a ship superintendent searching only for a “Nakakita Controller” may actually be looking for very different equipment.
SM MARINE SERVICE™ therefore supports enquiries across the broader Nakakita pneumatic-control family.
One of the most important related product categories is the NAKAKITA Automatic Temperature Controller.
Documented model designations include:
NSTM732 / NSTM-732
NS-TM-732
NS-TBT-732
NS-TBT-734
NSTM732-P1
depending on application and configuration. Published examples include 0–100°C temperature controllers and controllers for main-engine fuel-oil heater service.
These controllers can be found in marine systems such as:
Main Engine Jacket Cooling Water
Fuel Oil Heater
Lubricating Oil Temperature Control
Tank Cleaning Sea Water Heater
Heat Exchanger Control
Steam Heating Systems
For example, service records document NSTM732 in main-engine jacket-temperature-controller applications.
SM MARINE SERVICE™ can therefore support customers looking for either a Nakakita pressure controller or Nakakita temperature controller, subject to model and stock.
We already have a dedicated technical page covering another important Nakakita controller:
NAKAKITA NS TB732 Temperature Controller for Tank Cleaning Sea Water Heater
This NS TB732 Automatic Controller is used for temperature regulation of a tank-cleaning seawater heater system and operates on mechanical/pneumatic control principles.
This creates a very strong internal SEO relationship:
NAKAKITA PE2-3 Pressure Controller ↔ NSPS-732 Pressure Controller ↔ NS TB732 Temperature Controller ↔ NSTM732 Temperature Controller ↔ NAKAKITA Marine Pneumatic Controls
Although their front housings may look very similar, they perform different measurement functions.
A pressure controller responds to process pressure.
A temperature controller responds to process temperature through the appropriate sensing element.
However, both can form part of a pneumatic closed-loop system where the controller sends an air-pressure signal to a valve actuator or positioner.
Therefore, model identification should never be based only on the black Nakakita housing.
Always check:
Model • Scale • Application Plate • Measuring Range • Air Supply • Control Pressure • Sensing Element • Valve Arrangement
before ordering a replacement.
NAKAKITA's marine automation range extends well beyond the indicating controller itself.
Documented marine-market equipment includes:
Pneumatic Positioners
Pressure Switches
Solenoid Valves
Filter Regulators
Booster Relays
Automatic Control Valves
Valve Actuators
Valve Remote Control Systems
Hydraulic / Pneumatic Valve Equipment
This is important for troubleshooting because sometimes the controller itself is healthy while another component in the pneumatic control loop has failed.
Clean and correctly regulated instrument air is essential for reliable pneumatic controller operation.
Published Nakakita technical information identifies NS770C and NS770CG Filter Regulators. The design integrates pressure regulation with filtration for pneumatic instrumentation and is intended to remove contaminants such as scale, water, oil and grease from the air supply.
Contaminated instrument air can contribute to problems in small pneumatic passages, nozzles and flapper mechanisms.
Therefore, when a Nakakita controller becomes unstable, checking the air supply should be one of the first troubleshooting steps.
NAKAKITA pneumatic controllers and associated control equipment can be encountered in:
Auxiliary Boiler Systems
Excess Steam Control
Main Engine Cooling Water Systems
Main Engine Fuel Oil Heater Systems
Lubricating Oil Systems
Tank Cleaning Heater Systems
Steam Heating Systems
Heat Exchangers
Cargo Systems
Valve Remote Control Systems
Marine Process-Control Systems
A documented NSPS-732 application specifically identifies the controller for auxiliary-boiler excess steam, while Nakakita controller literature also documents cascade temperature-control arrangements for main-diesel-engine cooling fresh water.
The basic principle is straightforward.
The controller receives the actual process condition and compares it against the required setting.
When there is a deviation, the internal pneumatic mechanism changes the output signal.
That signal operates the control valve.
The valve then changes process flow until pressure or temperature returns toward the desired condition.
This mechanical/pneumatic design is one reason older Nakakita controllers remain relevant on many vessels: the ship may already have the complete pneumatic valve, piping and actuator system built around them.
Check:
Check:
Do not immediately assume the pressure controller has failed.
Check:
Controller Output → Signal Tubing → Positioner → Actuator → Control Valve
A problem anywhere in that chain can prevent the valve from responding.
Possible areas to investigate include:
Inspect pneumatic restrictions, tubing, air pressure, filter regulator, valve positioner and mechanical movement.
Older pneumatic equipment should be checked for aged tubing, seals, diaphragms and connections.
Independent maintenance material for these controllers specifically emphasizes clean air supply, periodic nozzle/orifice cleaning, inspection for internal leakage and condition of bellows/linkages.
For reliable long-term service:
Because incorrect controller adjustment can affect important machinery, calibration and tuning should be carried out by competent personnel familiar with the vessel's control system.
SM MARINE SERVICE™ can support sourcing of NAKAKITA marine control and automation equipment including:
PE2-3 Pressure Controller
PE2-3C Pressure Controller
NSPS-732 Automatic Pressure Controller
NS732 Indicating Controller
NSTM732 Temperature Controller
NS-TM-732 Temperature Controller
NS-TBT-732 Temperature Controller
NS-TBT-734 Temperature Controller
NS770C / NS770CG Filter Regulator
NS737S-D Pneumatic Positioner
Pressure Switches
Solenoid Valves
Pneumatic Relays
Control Valves
Valve Actuators
Pneumatic Instrumentation Components
Marine Valve Remote-Control Components
Available condition depending on stock:
New • Used • Refurbished • Reconditioned • Tested Working
SM MARINE SERVICE™ also maintains stock and sourcing channels for multiple Nakakita pressure and temperature controller types, making it useful for customers who have an old unit but do not yet know the exact model.
A customer does not necessarily need to know the exact part number before contacting us.
If your vessel has any NAKAKITA controller, valve, pneumatic instrument or related marine automation component, send:
Equipment Photo + Nameplate + Model + Measuring Range + Application + Required Quantity
SM MARINE SERVICE™ can check the requirement against available stock and sourcing options.
This includes enquiries for:
NAKAKITA Pressure Controller • Temperature Controller • Pressure Instrument • Pneumatic Controller • Positioner • Pressure Switch • Filter Regulator • Control Valve • Solenoid Valve • Valve Actuator • Marine Automation Spare Parts
Mechanical-pneumatic control equipment has several practical characteristics that make it valuable aboard existing vessels.
It can provide robust local control, the equipment is serviceable, and many ships were originally designed around pneumatic control valves and instrument-air systems.
Replacing one controller with an entirely different electronic architecture may require modifications to the valve, actuator, wiring, piping and control philosophy.
For this reason, finding a correct replacement, refurbished or reconditioned Nakakita controller can often be an attractive maintenance solution for an existing ship.
Nakakita's controller design is documented as compact, durable and suitable for both panel and local control applications.
PE2-3 is identified on the photographed equipment as a Pressure Controller for Excess Steam. Market documentation for the model also identifies pneumatic control characteristics and 0–15 kgf/cm² variants.
The designation is associated with excess-steam pressure control, and related NSPS-732 documentation specifically identifies auxiliary-boiler excess-steam applications.
NSPS-732 is a Nakakita automatic pneumatic pressure-controller family available in multiple measuring ranges. Published examples specify approximately 140 kPa supply air and 20–100 kPa control output.
Yes. Documented models include NSTM732, NS-TM-732 and NS-TBT-series temperature controllers for marine applications.
SM MARINE SERVICE™ stocks and sources Nakakita temperature-control equipment subject to availability, including units for marine engine/heater applications.
No. Similar appearance does not make them interchangeable. Measurement element, range, process application and controller configuration must match the system.
Published NS732-family documentation specifies approximately 0.2–1.0 kgf/cm² output with approximately 1.4 kgf/cm² supply air. Exact requirements must be checked for the individual model.
Yes. Depending on stock, equipment can be supplied in new, used, refurbished, reconditioned or tested-working condition.
Yes. Clear photographs of the front, internal mechanism and nameplate, together with the vessel application and measuring range, are the most useful information for identifying a replacement.
SM MARINE SERVICE™ supports worldwide marine-equipment supply and shipment arrangements.
The NAKAKITA PE2-3 Pressure Controller for Excess Steam is a marine pneumatic automatic controller used for pressure regulation in steam and boiler-control applications. SM MARINE SERVICE™ supplies PE2-3, NSPS-732 and related Nakakita pressure controllers together with NSTM732, NS-TM-732 and other temperature controllers, pneumatic positioners, filter regulators, control valves and marine automation spare parts. New, used, refurbished and reconditioned equipment can be supplied subject to stock with worldwide shipping and technical sourcing support.
I located a detailed technical catalogue covering Nakakita automatic indicating controllers, pressure-setting controllers and their applications. It documents pressure, temperature, differential-pressure, liquid-level, flow and viscosity control principles.
View NAKAKITA Automatic Controller Technical Documentation
This technical resource includes Nakakita control-valve accessories such as NS770C / NS770CG filter regulators and NS766C booster relay.
View NAKAKITA Control Valve & Accessories Catalogue
I did not locate a trustworthy public standalone manual specifically labelled PE2-3 User Manual. Therefore, I would not put an unrelated PDF on the page and call it the PE2-3 manual.
NAKAKITA Temperature Controller for Tank Cleaning Sea Water Heater – NS TB732
This is an especially valuable internal link for this blog because it connects your Pressure Controller page directly with your Temperature Controller inventory and creates a broader NAKAKITA marine automation topic cluster.
Marine Automation & Navigation Equipment Supplier
Available Condition:
• New Equipment • Used Equipment • Refurbished Equipment • Reconditioned Equipment
Stock Location:
• Bangladesh • China
Services:
• Worldwide Shipping • Technical Support • Spare Parts Supply • Marine Equipment Sourcing
Contact Information
SM MARINE SERVICE™ Samir Market, DT Road, Pahartali, beside CDA Market, Chattogram, Bangladesh
Mobile / WhatsApp / Viber: +88 01818 929292
Email: info@smmarineservice.com
Website: www.smmarineservice.com
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