Pneumatic Directional Valve
NABCO (Nabtesco Corporation / Nabco Marine Systems)
Refurbished
Manufacturer: NABCO / Nippon Air Brake Co., Ltd.
Country of Origin: Japan
Product Type: Pneumatic Directional Valve
Marine Application: Main engine remote control, maneuvering air logic, pneumatic actuator switching, and marine automation air control circuits
The equipment shown in your photos is the NABCO Super Spool PSM-44C Pneumatic Directional Valve, manufactured by Nippon Air Brake Co., Ltd. (NABCO), Kobe, Japan. The nameplate visible in the image identifies the valve as:
This is a marine pneumatic control valve used to switch compressed air flow between ports in remote control and maneuvering systems. On ships, valves of this type are commonly found in main engine remote control systems, maneuvering circuits, pneumatic actuator control blocks, and air logic systems where reliable directional control of air is essential.
NABCO / Nabtesco marine references show that pneumatic directional valves of the Super Spool family are used in marine remote control and engine maneuvering systems. Marine spare-parts listings also identify PSM-series Super Spool valves as pneumatic directional valves used in shipboard control applications.
The NABCO PSM-44C is a pneumatic directional spool valve. Its main job is to direct compressed control air from an inlet port to one of the output ports while venting the opposite side through exhaust ports. In practical marine service, this allows the valve to control the movement of pneumatic actuators or to perform switching logic in remote control systems.
From the port markings visible on your valve body:
This port arrangement is typical of a directional spool valve used to change actuator direction or to switch pneumatic control logic. Technical descriptions of Super Spool valves explain that the spool shifts to open and close internal passages, allowing directional control of airflow to actuators or other pneumatic devices.
In marine systems, this kind of valve may be used for:
The valve is designed to route compressed air to different outputs depending on the electrical actuation of the solenoid.
NABCO marine references associate Super Spool valves with marine vessel equipment and engine remote control systems, making them relevant for ship maneuvering and automation duties.
Your valve nameplate shows AC220V 50Hz, indicating an electrically actuated solenoid operator that shifts the spool.
The PSM-44C is built as a compact block-type directional valve suitable for panel or manifold installation in marine control systems.
The valve plate indicates Max. Press. 9 kgf/cm², which is consistent with compressed-air control systems used in marine automation and maneuvering circuits.
A NABCO Super Spool PSM-44C typically consists of:
From the markings in your photos, the functional ports are clearly laid out on the body:
This makes the valve suitable for controlling double-acting pneumatic functions or switching between two control-air paths depending on system design.
The NABCO PSM-44C can be used in a range of marine pneumatic systems, especially older or established Japanese ship automation and engine maneuvering installations. Typical applications include:
Where NABCO / Nippon Air Brake remote control equipment is fitted, Super Spool valves are often an important spare because they directly affect command air routing.
Possible causes: burned solenoid coil, no AC 220V supply, wiring fault, stuck spool, internal contamination.
Checks: verify coil voltage, continuity, terminal connection, and whether the spool moves when commanded.
Possible causes: spool jam, internal wear, low control air pressure, blocked exhaust, incorrect piping.
Checks: confirm supply air at IN, inspect output and exhaust ports, and test valve response under normal pressure.
Possible causes: worn internal seals, spool wear, dirt, damaged O-rings, cracked fitting.
Checks: use leak-detection spray or soapy water, inspect fittings, and verify whether leakage is continuous or only during switching.
Possible causes: sticky spool, low supply pressure, partially blocked line, moisture / oil contamination in air line.
Checks: measure air pressure, inspect filter / regulator / dryer condition, and confirm valve exhaust is not obstructed.
Possible causes: wrong supply frequency / voltage, damaged coil, continuous overloading, insulation deterioration.
Checks: verify AC220V 50Hz matches the vessel’s supply and inspect the coil condition.
For marine maneuvering systems, even a small directional valve fault can cause delayed response or failed control-air switching, so keeping a tested spare is a good practice.
Ships still use the NABCO Super Spool PSM-44C because many marine remote control and pneumatic maneuvering systems remain in service for years. These valves are simple, robust, and well suited for compressed-air-based control logic. Instead of replacing a complete control system, operators often maintain reliability by replacing individual spool valves, coils, or related fittings.
It is a pneumatic directional spool valve used to switch compressed air between outputs in marine control systems.
It can be used in main engine remote control, maneuvering air logic, actuator control, and pneumatic automation circuits.
Typically:
The valve in your photo is marked AC220V 50Hz.
The nameplate shows 9 kgf/cm².
Please send:
The NABCO Super Spool PSM-44C Pneumatic Directional Valve is a Japanese marine pneumatic control valve used for switching compressed air in ship remote control and maneuvering systems. With AC220V 50Hz solenoid actuation and a 9 kgf/cm² pressure rating, it is suitable for engine control air logic, actuator switching, and marine automation pneumatic circuits. It remains a useful spare part for ships operating NABCO / Nippon Air Brake remote control equipment.
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
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
0
BDT 0
BDT 0
BDT 0
BDT 0
Marine Equipment Supplier