Rexroth DB 30-2-31/315 Pilot-Operated Pressure Relief Valve
Rexroth DB 30-2-31/315 Pilot-Operated Pressure Relief Valve
This heavy-duty Rexroth Pilot-Operated Pressure Relief Valve (Model: DB 30-2-31/315) was manufactured by the Hydro-Norma division in West Germany, known for precision hydraulic engineering and long service life.
Designed for high-flow, high-pressure hydraulic systems, this valve provides accurate pressure limitation up to 315 bar (4,500 PSI) and is suitable for industrial, marine, power plant, and heavy machinery applications.
Product Identification
• Manufacturer: Bosch Rexroth (Hydro-Norma Division – West Germany)
• Model Number: DB 30-2-31/315
• Valve Type: Pilot-operated pressure relief valve (Type DB)
• Series: 3X (Component Series 30–39)
• Nominal Size: 30 (Size 32 subplate)
• Pressure Rating: Up to 315 Bar
• Max Flow Rate: Approx. 650 L/min
• Mounting: Subplate mounting – ISO 6264-10-17
Technical Features
Pilot-Operated Design
Unlike direct-acting relief valves, this model uses a two-stage pilot system:
• Small pilot valve controls
• Large main spool stage
Benefits:
Stable pressure control
High flow handling
Reduced pressure override
Suitable for heavy-duty systems
Adjustment Mechanism
Adjustment Type: 2 (Hand wheel / Hex sleeve with protective cap)
To adjust pressure:
• Loosen locknut
• Turn adjustment screw clockwise ? Increase pressure
• Turn counter-clockwise ? Decrease pressure
• Tighten locknut after setting
This sets the cracking pressure of the hydraulic system.
Port Configuration
• Port A ? Pressure inlet (System line)
• Port B ? Tank return
Designed according to ISO subplate mounting standards for industrial hydraulic manifolds.
Applications
• Hydraulic power packs
• Injection molding machines
• Steel plants
• Press machines
• Marine hydraulic systems
• Oil & gas equipment
• Heavy construction machinery
• Industrial hydraulic control systems
Industries Served
• Manufacturing
• Marine engineering
• Offshore oil & gas
• Power generation
• Heavy engineering
• Mining industry
Condition & Service Recommendation
This is a vintage West Germany manufactured valve, known for extreme durability and precision machining.
Important:
If recommissioning after long storage, it is highly recommended to:
• Replace internal NBR seals
• Inspect pilot stage
• Clean internal passages
• Recalibrate pressure setting
Rubber seals may degrade over decades even if external condition appears good.
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
