Built to withstand vibration, temperature fluctuations and continuous operation, the NSPS732 series is known for its durability and long service life in marine engine rooms. The unit operates pneumatically, using an internal microswitch or pneumatic control mechanism activated by pressure changes acting on the bellows. Its compact construction and reliable performance make it a standard choice for OEM installations and retrofit projects on commercial vessels.

Precise Pneumatic Control
This controller is a fully self-contained unit that combines temperature sensing, indication, and control. It utilizes a temperature sensing bulb (typically with a 5-meter capillary tube) to measure the process temperature. The measured value is clearly displayed on an integrated, easy-to-read dial scale calibrated for 0 to 100°C. Its operating principle revolves around a simple closed-loop circuit, where the controller positions a 3-way temperature control valve to precisely adjust the heat-exchange flow and maintain the desired temperature.

Standardized Output Signal
The controller translates the temperature measurement into a proportional pneumatic output signal. The standard output is 0.2 – 1.0 KGF/CM² (approximately 20–100 kPa or 0.2–1.0 bar), which is the industry-standard signal for pneumatic control systems. This signal is used to directly position a pneumatic control valve, damper, or other final control element, providing simple and effective temperature regulation without the need for electrical power.

Robust and Reliable Design
True to NAKAKITA’s reputation, this instrument is engineered for longevity and reliability. Key features include:

• Mechanical Durability: Designed to withstand the vibration and harsh conditions found in marine engine rooms and industrial plants .

• Pneumatic Operation: Intrinsically safe and unaffected by electrical interference, making it ideal for a wide range of environments .

• Clear Indication: The large, local dial allows for immediate visual confirmation of the process temperature, independent of any remote monitoring system.

• Certified for Marine Use: Typically approved by major classification societies like DNV, BV, GL, Lloyds Register, and ABS .

Typical Applications
This type of controller is commonly used in various marine and industrial systems, including:

• Main Engine Jacket Cooling Water: Regulating high-temperature cooling water.

• Purifier Heaters: Controlling low-temperature cooling for fuel and lube oil purifiers.

• Fuel Oil Systems: Controlling the temperature of fuel oil to ensure proper viscosity for combustion.

• Lubricating Oil Systems: Maintaining optimal lube oil temperature for engines and machinery.

Precise Pneumatic Control
This controller is a fully self-contained unit that combines temperature sensing, indication, and control. It utilizes a temperature sensing bulb (typically with a 5-meter capillary cable) to measure the process temperature. The measured value is clearly displayed on an integrated, easy-to-read scale calibrated for 0 to 150°C.

Standardized Output Signal
The controller translates the temperature measurement into a proportional pneumatic output signal. The standard output is 0.2 – 1.0 KGF/CM² (approximately 20–100 kPa or 0.2–1.0 bar), which is the industry-standard signal for pneumatic control systems. This signal is used to directly position a pneumatic control valve, damper, or other final control element, providing simple and effective temperature regulation without the need for electrical power.

Robust and Reliable Design
True to NAKAKITA’s reputation, this instrument is engineered for longevity and reliability. Key features include:

• Mechanical Durability: Designed to withstand the vibration and harsh conditions found in marine engine rooms and industrial plants .

• Pneumatic Operation: Intrinsically safe and unaffected by electrical interference, making it ideal for a wide range of environments.

• Clear Indication: The large, local dial allows for immediate visual confirmation of the process temperature, independent of any remote monitoring system .

Typical Applications
This type of controller is commonly used in various marine and industrial systems, including:

• Fuel Oil Systems: Controlling the temperature of fuel oil to ensure proper viscosity for combustion.

• Lubricating Oil Systems: Maintaining optimal lube oil temperature for engines and machinery.

• Cooling Water Systems: Regulating the temperature of jacket water or central cooling systems.

• HVAC Systems: Controlling heating or cooling coils in ventilation systems.

While specific model numbers like TBT732, NSTM 732, or NS-TM-732 appear on various units, the core functionality of a 0-150°C indicating pneumatic controller remains consistent, offering a proven and reliable solution for critical temperature control applications .

Precision Engineering for Critical Control
This model receives a standard pneumatic input signal of 20–100 kPa (0.2–1.0 kgf/cm²) and modulates the output pressure to drive double-acting cylinders with precision. With a lag and repeatability of less than 1% , it guarantees stable fluid flow and pressure regulation in pipelines. The unit supports a CAM input angle of 60–120° and allows for the selection of linear or equal percentage characteristics via interchangeable cams, enabling perfect matching with the flow dynamics of your control valve.

Versatile and Robust Operation
The NS737D-CR is built to operate within a wide supply pressure range of 1.4–7.0 kgf/cm² (140–700 kPa) and can achieve output pressures up to 1000 kPa to meet the demands of high-pressure actuators. Its design emphasizes efficiency, with a maximum air consumption of approximately 20 Nl/min, reducing air source costs during continuous operation. The direction of action (forward or reverse) can be easily switched in the field, and the unit supports split-range operation for added flexibility.

Durable Design for Harsh Environments
Consistent with NAKAKITA’s reputation in the marine sector, the NS737D-CR is constructed to withstand harsh conditions, including vibration and corrosive atmospheres. It features standard connection ports (PT 1/4 for air supply, PT 1/8 for pressure gauges), allowing for real-time pressure monitoring and simplified maintenance. This makes it an ideal choice for critical applications such as cargo oil systems, ballast water management, and fuel delivery pipelines on vessels .