Product Overview
The Nakakita NS-TM-790N is a pneumatic indicating temperature controller designed for automatic temperature regulation in marine engine-room and industrial fluid systems.
It measures process temperature using a mercury-expansion thermal element, displays the measured value locally and generates a proportional pneumatic output signal for operating a control valve.
Technical Specifications
| Product information | Details |
|---|---|
| Manufacturer | Nakakita Seisakusho Co., Ltd. |
| Model | NS-TM-790N |
| Product type | Pneumatic indicating temperature controller |
| Measuring principle | Mercury-expansion thermal element |
| Available temperature ranges | 0–100°C, 0–150°C, 0–200°C, 0–300°C and 0–500°C |
| Controller action | Pneumatic proportional control |
| Output signal | 0.2–1.0 kgf/cm² |
| Supply-air pressure | 1.4 kgf/cm² |
| Local indication | Analogue temperature scale |
| Sensing arrangement | Remote temperature bulb and capillary |
| Wetted-part materials | AISI 304 and AISI 316 stainless steel |
| Controlled equipment | Pneumatic control valve |
| Typical media | Cooling water, lubricating oil, fuel oil and compatible process fluids |
| Typical applications | Jacket-cooling water, lubricating-oil coolers and fuel-oil heaters |
| Installation areas | Marine engine rooms, power plants and industrial process systems |
| Control system | Self-contained pneumatic control loop |
| Electrical supply | Not required for pneumatic operation |
Product Description
The Nakakita NS-TM-790N detects changes in fluid temperature through its remote thermal sensing element. The measured temperature is shown on the controller’s analogue scale and converted into a 0.2–1.0 kgf/cm² pneumatic control signal.
This output positions a connected control valve to regulate heating, cooling, mixing or bypass flow. It is commonly used to maintain stable temperatures in main-engine jacket-water, lubricating-oil and fuel-oil systems.
Its fully pneumatic operating principle makes the controller suitable for reliable service in demanding marine environments and installations where electrical control power is unavailable or undesirable.
