OVAL VALVE OPEN SHUT INDICATOR NPI45B30 (2822cc)
OVAL VALVE OPEN SHUT INDICATOR NPI45B30 (2822cc)
The OVAL NPI45B is a compact hydraulic valve opening indicator designed for precise 0–100% valve position monitoring in marine, offshore, industrial, and hydraulic automation systems. This model uses a high-accuracy oval-gear flow meter mechanism to display valve opening and provides remote electrical feedback through integrated microswitch/potentiometer terminals. Ideal for Damcos, Danfoss, Emerson, Nakakita, and other hydraulic actuator systems.
Product Details
Brand: OVAL Corporation, Japan
Model: NPI45B30
Type: Hydraulic Valve Opening Indicator
Capacity: 2822 cc (flow displacement related to actuator volume)
Display Range: 0–100% (SHUT to OPEN)
Mechanism: Oval gear positive displacement meter
Construction: Compact metal body with black terminal head for electrical signaling
Output: Pointer display + electrical microswitch/potentiometer (depending on variant)
Technical Specifications
• Measurement Type: Hydraulic oil displacement measurement
• Operating Principle: Dual oval-gear PD meter mechanically linked to indicator dial
• Flow Range: Suitable for approximately 0.08 to 8 L/min (typical NPI45 series range)
• Max Operating Pressure: Approx. 13.7 MPa (standard NPI45 range)
• Fluid Medium: Hydraulic operating oil (ISO VG32, VG46, VG68)
• Temperature Range: ?10°C to +80°C
• Dial Markings:
• SHUT (0%)
• Open arc 0–100%
• OPEN
• Terminal Box:
• Electrical feedback for remote monitoring
• Microswitches or potentiometer depending on configuration
How the OVAL NPI45B30 Works
The NPI45B30 is installed in series with the hydraulic actuator line.
When the valve actuator moves:
1. Hydraulic oil displacement drives the internal oval gears.
2. Gear rotation is transferred via shaft/magnetic coupling to the front dial.
3. The indicator pointer moves across 0–100%, showing the exact valve position.
4. Terminal-box mounted electrical devices provide open/close signals or analog feedback to the control system.
This makes the NPI45B30 one of the most reliable hydraulic valve position indicators used worldwide for ROV (remote operated valve) systems.
Applications
• Marine hydraulic valve actuators
• Remote operated valve (ROV) systems
• Tanker cargo valves
• Ballast system valves
• Fuel oil/diesel oil valve control
• Industrial hydraulic cylinders
• Offshore platform valve monitoring
• Power plant and refinery automation
Key Features
• Accurate valve travel measurement
• Built-in electrical feedback
• No-slip oval gear mechanism
• Maintenance-free design
• Ideal for harsh marine and industrial environments
• Compatible with Damcos/Danfoss/Emerson actuator circuits
• High durability and corrosion-resistant build
Global Export – Gani Marine Exporter
Russia : Moscow, Saint Petersburg, Novorossiysk, Vladivostok, Murmansk, Kaliningrad, Sochi, Arkhangelsk, Rostov-on-Don, and other port cities.
UAE – United Arab Emirates : Dubai, Abu Dhabi, Sharjah, Ajman, Ras Al Khaimah, Fujairah, Khor Fakkan, Umm Al Quwain, and all industrial and port zones.
China : Shanghai, Shenzhen, Guangzhou, Qingdao, Tianjin, Hong Kong, Dalian, Xiamen, Ningbo, Chongqing, Wuhan, and other major cities.
UK : London, Liverpool, Southampton, Newcastle, Aberdeen, Glasgow, Bristol, Birmingham, Manchester, and all significant ports.
France : Paris, Marseille, Le Havre, Dunkirk, Lyon, Bordeaux, Nice, Nantes.
Germany : Hamburg, Bremen, Frankfurt, Berlin, Munich, Dresden, Dusseldorf, Stuttgart.
Italy : Genoa, Venice, Trieste, Naples, Rome, Milan, Palermo, Livorno.
Spain : Barcelona, Valencia, Algeciras, Madrid, Bilbao, Seville, Malaga.
Japan : Tokyo, Yokohama, Osaka, Kobe, Nagoya, Hiroshima, Fukuoka, Kitakyushu.
Canada : Vancouver, Montreal, Toronto, Halifax, Saint John, Calgary, Edmonton, Winnipeg.
Brazil : Sao Paulo, Rio de Janeiro, Santos, Salvador, Recife, Porto Alegre, Fortaleza.
Turkey : Istanbul, Izmir, Mersin, Ankara, Antalya, Bursa, Samsun.
Australia : Sydney, Melbourne, Brisbane, Perth, Adelaide, Fremantle, Darwin.
South Korea : Busan, Incheon, Seoul, Ulsan, Gwangyang, Pohang.
Singapore : Singapore and all major port facilities.
Netherlands : Rotterdam, Amsterdam, Vlissingen, Groningen, Utrecht.
Norway : Oslo, Bergen, Stavanger, Trondheim, Kristiansand, Tromso, Alesund.
Sweden : Stockholm, Gothenburg, Malmo, Helsingborg, Umea.
Poland : Gdansk, Gdynia, Szczecin, Warsaw, Krakow, Wroclaw.
Indonesia : Jakarta, Surabaya, Semarang, Medan, Makassar, Batam, Balikpapan.
Malaysia : Port Klang, Penang, Johor Bahru, Kuantan, Kuching, Kota Kinabalu.
Saudi Arabia : Jeddah, Dammam, Riyadh, Jubail, Yanbu, Ras Tanura, Mecca.
Egypt : Alexandria, Port Said, Cairo, Suez, Damietta.
Thailand : Bangkok, Laem Chabang, Phuket, Pattaya, Songkhla.
Philippines : Manila, Cebu, Davao, Batangas, Subic Bay.
Nigeria : Lagos, Port Harcourt, Abuja, Warri, Calabar, Onne.
Bangladesh : Dhaka, Chattogram, Khulna, Mongla, Narayanganj.
Vietnam : Ho Chi Minh City, Hanoi, Haiphong, Da Nang, Can Tho.
Argentina : Buenos Aires, Rosario, Bahia Blanca, Cordoba, La Plata.
Africa : Tangier-Med, Casablanca, Algiers, Oran, Annaba, Tunis, Rades, Sfax, Tripoli, Benghazi, Misrata, Port Said, Alexandria, Damietta, Dakar, Nouakchott, Nouadhibou, Conakry, Freetown, Monrovia, Abidjan, San Pedro, Tema, Takoradi, Lomé, Cotonou, Lagos, Apapa, Tin Can, Lekki, Port Harcourt, Warri, Calabar, Douala, Kribi, Libreville, Port-Gentil, Pointe-Noire, Matadi, Boma, Djibouti, Doraleh, Berbera, Bossaso, Mogadishu, Mombasa, Lamu, Dar es Salaam, Zanzibar, Tanga, Beira, Maputo, Nacala, Durban, Richards Bay, Ngqura, Port Elizabeth, Gqeberha, Cape Town, Saldanha Bay, East London, Walvis Bay, Lüderitz, Luanda, Lobito, Namibe, Port Sudan, Suakin, Massawa, Assab, Malabo, Bata, Moroni, Mahajanga, Toamasina, Tamatave, Antsiranana, Ehoala, Saint Louis, Banjul, Pemba, Quelimane, Kismayo.
Gani Marine Exporter – Global Marine Hydraulic Supplier
