Darling Muesco SVC-500 Steam Safety Relief Valves
Gulf Oil & Gas International distributes genuine Darling Muesco Open Bonnet Steam Safety Relief Valves engineered in joint venture with Anchor/Darling Valve Co. USA & Muesco Inc. USA. Manufactured per API-526, API-520, ASME Boiler & Pressure Vessel Code Sec I & VIII, and Boiler Regulations (IBR) for utility power boilers, refineries, petrochemical plants, and thermal processing facilities across the Middle East, Africa, and CIS.
SVC-500 Valve Engineering & Construction
The Darling Muesco SVC-500 series is engineered specifically for steam service overpressure protection, combining rapid full-opening pop action with an open bonnet architecture to protect springs from thermal setting loss.
Open Bonnet & Plain Lever
Standard configuration for steam generation systems where isolating the spring from process heat and backpressure accumulation is critical.
- Anatomy: Open top bonnet with stainless steel lifting lever & fork
- Spring Protection: Continuous air cooling prevents spring relaxation
- Spring Quality: High-grade alloy steel spring with spring washers
- Trim: Full nozzle, reaction hood, and disc holder with antifrictional ball
Heavy-Duty Metallurgy
Engineered with ASTM standard castings for continuous service under saturated and superheated steam conditions.
- Body MOC: ASTM A216 Gr. WCB Cast Steel / Alloy Steel
- Internals: Stainless Steel (ASTM A276 Type 304/316 / 410)
- Nozzle Ring: Hardfaced stainless steel with lock screw
- Sealing: Precision-lapped disc and nozzle interface tested to API-527
Codes, Standards & Flanges
Fully compliant with global boiler inspection codes and interchangeable API center-to-face dimensions.
- Design Standards: API-526, API-520 Part-1, ASME I & VIII
- Boiler Regulations: Fully IBR certified for high-pressure boilers
- Flange Standards: ANSI B16.5 (150# to 2500#), BS:10, DIN, JIS
- Quality Seals: UL, CE, and ISO 9001:2015 certified
Industries & Sectors Using Steam Safety Relief Valves
Darling Muesco SVC-500 valves provide certified overpressure safety across heavy industrial, energy, manufacturing, and process utility sectors.
Thermal Power & Cogeneration (CHP)
Fossil fuel, coal-fired, combined-cycle gas turbine (CCGT), biomass, and waste-to-energy power plants.
Oil Refineries & Petrochemical
Fluid catalytic cracking (FCC) units, hydrocrackers, steam methane reformers (SMR), crude distillation, and aromatics.
Fertilizer & Chemical Complexes
Ammonia synthesis loops, urea reactors, nitric acid plants, sulfur recovery units (SRU), and polymer manufacturing.
Sugar Mills & Distilleries
Bagasse-fired boilers, high-pressure steam distribution headers, multi-effect evaporators, and ethanol distillation columns.
Pulp, Paper & Board Mills
Chemical recovery boilers, digesters, steam-heated drying cylinders, paper machine manifolds, and black liquor recovery.
Thermal Desalination Plants
Multi-Stage Flash (MSF) and Multi-Effect Distillation (MED) thermal vapor compression boilers and auxiliary steam circuits.
District Heating & Utilities
Municipal steam distribution grids, centralized institutional boiler houses, high-pressure steam transmission mains.
Mining & Mineral Processing
High-pressure steam autoclaves, gold/nickel extraction circuits, acid leaching facilities, and processing furnaces.
Heavy Manufacturing & Metallurgy
Steel rolling mills, forging plants, tire vulcanization autoclaves, rubber curing presses, and foundries.
Food, Beverage & Dairy
Industrial steam cookers, flash pasteurizers, spray drying towers, brewery brew-kettles, and vegetable oil refining.
Textile Dyeing & Processing
Steam stenter frames, sizing machines, dyeing autoclaves, fabric drying cylinders, and process finishing lines.
Offshore Oil & Marine Vessels
FPSO steam generation packages, Enhanced Oil Recovery (EOR) steam injection, and marine propulsion auxiliary boilers.
Critical Equipment & Process Applications
Specific installations where SVC-500 Open Bonnet Steam Safety Relief Valves are mandated by statutory boiler codes and engineering standards.
Power & Industrial Boilers
- Main Steam Drums (ASME Sec I & IBR)
- Superheater & Reheater Outlets
- Economizer Inlets & Tube Headers
- Auxiliary Package Steam Boilers
- Waste Heat Recovery Boilers (WHRB / HRSG)
Process Headers & Steam Distribution
- High, Medium & Low-Pressure Steam Headers
- Pressure Reducing & Desuperheating Stations (PRDS)
- Steam Turbine Bypass Lines
- Deaerator Pressure Vessels & Storage Tanks
- Reboiler & Condensate Flash Vessels
Thermal Process Machinery
- Industrial Steam Autoclaves & Retorts
- Steam-Jacketed Reaction Vessels & Cookers
- Evaporator & Distillation Reboiler Steam Inlets
- Vulcanizing Presses & Tire Curing Molds
- Heat Exchangers & Calandrias
Live Stock Inventory Matrix (Dubai Stock Hub)
Gulf Oil & Gas International maintains immediate stock of genuine Darling Muesco Steam Safety Relief Valves with Cast Steel Body and Stainless Steel Internals available for rapid export.
| Valve Size (Inlet x Outlet) | API Orifice Letter | Description | Material of Construction (MOC) | Calibrated Set Pressure | Make |
|---|---|---|---|---|---|
| 25 MM x 50 MM (1" x 2") | G1 | Steam Safety Relief Valve | Cast Steel Body - Stainless Steel Internals | 3.5 Kg/cm² | Darling Muesco |
| 25 MM x 50 MM (1" x 2") | G1 | Steam Safety Relief Valve | Cast Steel Body - Stainless Steel Internals | 6.5 Kg/cm² | Darling Muesco |
| 25 MM x 50 MM (1" x 2") | G1 | Steam Safety Relief Valve | Cast Steel Body - Stainless Steel Internals | 10.5 Kg/cm² | Darling Muesco |
| 25 MM x 50 MM (1" x 2") | G1 | Steam Safety Relief Valve | Cast Steel Body - Stainless Steel Internals | 11.25 Kg/cm² / 11.78 Kg/cm² | Darling Muesco |
| 25 MM x 50 MM (1" x 2") | G1 | Steam Safety Relief Valve | Cast Steel Body - Stainless Steel Internals | 17.5 Kg/cm² | Darling Muesco |
| 25 MM x 50 MM (1" x 2") | G1 | Steam Safety Relief Valve | Cast Steel Body - Stainless Steel Internals | 22.0 Kg/cm² / 22.54 Kg/cm² | Darling Muesco |
| 40 MM x 80 MM (1-1/2" x 3") | J1 | Steam Safety Relief Valve | Cast Steel Body - Stainless Steel Internals | 10.5 Kg/cm² | Darling Muesco |
| 40 MM x 80 MM (1-1/2" x 3") | J1 | Steam Safety Relief Valve | Cast Steel Body - Stainless Steel Internals | 14.05 Kg/cm² | Darling Muesco |
| 40 MM x 80 MM (1-1/2" x 3") | J1 | Steam Safety Relief Valve | Cast Steel Body - Stainless Steel Internals | 17.5 Kg/cm² | Darling Muesco |
| 50 MM x 80 MM (2" x 3") | J | Steam Safety Relief Valve | Cast Steel Body - Stainless Steel Internals | 3.5 Kg/cm² / 10.5 Kg/cm² | Darling Muesco |
| 50 MM x 80 MM (2" x 3") | J | Steam Safety Relief Valve | Cast Steel Body - Stainless Steel Internals | 17.5 Kg/cm² / 18.5 Kg/cm² / 24.0 Kg/cm² | Darling Muesco |
| 80 MM x 100 MM (3" x 4") | K | Steam Safety Relief Valve | Cast Steel Body - Stainless Steel Internals | 3.5 Kg / 10.5 Kg / 17.5 Kg / 18.1 Kg / 21.0 Kg | Darling Muesco |
| 80 MM x 100 MM (3" x 4") | M | Steam Safety Relief Valve | Cast Steel Body - Stainless Steel Internals | 5.5 Kg/cm² / 6.5 Kg/cm² | Darling Muesco |
SVC-500 Dimensional Standards (API-526)
Standard center-to-face and height dimensions for Darling Muesco Open Bonnet Steam Safety Relief Valves per technical drawing SVC-500.
| Valve Size (Inches) | Valve Size (mm) | Dimension A (Inlet to CL mm) | Dimension B (CL to Outlet mm) | Dimension C (Overall Height ±50mm) |
|---|---|---|---|---|
| 1" x 2" | 25 x 50 | 105.0 | 114.5 | 450 |
| 1-1/2" x 2" | 40 x 50 | 124.0 | 120.5 | 505 |
| 1-1/2" x 2-1/2" | 40 x 65 | 124.0 | 120.5 | 505 |
| 1-1/2" x 3" | 40 x 80 | 130.0 | 124.0 | 530 |
| 2" x 3" | 50 x 80 | 133.0 | 124.0 | 575 |
| 2-1/2" x 4" | 65 x 100 | 136.5 | 143.0 | 595 |
| 3" x 4" | 80 x 100 | 155.0 | 162.0 | 620 |
| 4" x 6" | 100 x 150 | 181.0 | 229.0 | 950 |
| 6" x 8" | 150 x 200 | 240.0 | 241.0 | 1250 |
| 8" x 10" | 200 x 250 | 276.0 | 280.0 | 1450 |
| 10" x 14" | 250 x 350 | 380.0 | 370.0 | 1600 |
Territorial Supply Coverage: Middle East, Africa & CIS
Gulf Oil & Gas International distributes certified Darling Muesco Steam Safety Valves with factory test certificates, on-site calibration, and engineering support across key industrial and energy territories:
🇦🇪 United Arab Emirates
Dubai (JAFZA, DIPC), Abu Dhabi (ICAD, Mussafah, Ruwais, Habshan), Sharjah (Hamriyah), Ras Al Khaimah, Fujairah Port.
🇸🇦 Saudi Arabia (KSA)
Riyadh Industrial Cities, Jubail Industrial City, Dammam 1st & 2nd, Yanbu, Ras Tanura, Rabigh, Jazan Economic City.
🇶🇦 Qatar & 🇰🇼 Kuwait
Doha Industrial Area, Ras Laffan Industrial City, Mesaieed, Kuwait City (Shuwaikh), Ahmadi Refinery Hub, Mina Abdulla.
🇴🇲 Oman & 🇧🇭 Bahrain
Muscat (Rusayl), Sohar Port, Salalah Free Zone, Duqm Port, Manama (Hidd Industrial Area), Sitra BAPCO Hub.
🇮🇶 Iraq
Basra (Khor Al Zubair Port), Erbil, Baghdad, Rumaila Oilfield, West Qurna, Baiji Industrial Hub.
🇪🇬 Egypt
Cairo (10th of Ramadan), Alexandria (Borg El Arab), Suez Canal Economic Zone, Port Said, Ain Sokhna, Damietta.
🇩🇿 Algeria
Hassi Messaoud, Skikda Petrochemical, Arzew Gas Terminal, Algiers Industrial Zone, Oran, Bethioua.
🇲🇦 Morocco
Casablanca, Tanger Med Port & Free Zone, Jorf Lasfar Industrial Complex, Safi Chemical Hub, Rabat, Kenitra.
🇹🇳 Tunisia & 🇱🇾 Libya
Tunis, Sfax, Bizerte Refinery Hub, Gabes Chemical Zone, Tripoli, Benghazi, Misrata Port, Ras Lanuf Terminal, Marsa El Brega.
🇳🇬 Nigeria
Lagos (Lekki FTZ, Apapa), Port Harcourt (Onne Port), Warri Refinery, Bonny Island LNG, Calabar Free Trade Zone, Kaduna.
🇬🇭 Ghana & 🇨🇮 Ivory Coast
Accra, Takoradi Port & Energy Hub, Tema Industrial Area, Abidjan Port & Refining Hub, San Pedro Port.
🇸🇳 Senegal & 🇲🇷 Mauritania
Dakar Port, Saint-Louis Offshore Gas Basin, Mbour, Nouakchott Port, Nouadhibou Mining Port.
🇦🇴 Angola
Luanda, Cabinda Offshore Terminal, Soyo LNG Hub, Lobito Port & Refinery Development.
🇬🇦 Gabon & 🇨🇬 Congo
Libreville, Port-Gentil Oil Terminal, Pointe-Noire Offshore Hub, Brazzaville Industrial Area.
🇬🇶 Equatorial Guinea & 🇨🇲 Cameroon
Malabo, Punta Europa LNG, Bata, Douala Industrial Port, Kribi Deep Sea Port, Limbe Refinery.
🇨🇩 DR Congo
Kinshasa, Lubumbashi Mining Center, Kolwezi Copperbelt, Matadi Port, Boma.
🇰🇪 Kenya & 🇺🇬 Uganda
Nairobi, Mombasa Port & Kipevu Oil Terminal, Lamu Port, Kisumu, Kampala, Hoima Lake Albert Energy Basin.
🇹🇿 Tanzania & 🇲🇿 Mozambique
Dar es Salaam Port, Mtwara Gas Hub, Tanga, Maputo Port, Afungi LNG Hub, Pemba Oil & Gas Port, Beira.
🇪🇹 Ethiopia & 🇷🇼 Rwanda
Addis Ababa, Dire Dawa Industrial Park, Hawassa Industrial Park, Kigali Special Economic Zone, Bugesera.
🇿🇦 South Africa
Johannesburg, Durban Port, Cape Town, Richards Bay Coal & Gas Terminal, Saldanha Bay, Secunda Sasol Complex, Sasolburg.
🇳🇦 Namibia & 🇧🇼 Botswana
Windhoek, Walvis Bay Port, Luderitz Energy Hub, Gaborone Industrial Area, Francistown, Jwaneng.
🇿🇲 Zambia & 🇿🇼 Zimbabwe
Lusaka, Kitwe Copperbelt, Ndola Refinery, Harare, Bulawayo Industrial Zone, Hwange Power Station.
🇰🇿 Kazakhstan & 🇦🇿 Azerbaijan
Aktau Port, Atyrau Caspian Hub, Tengiz Field, Kashagan Offshore, Baku Shipyard, Sangachal Terminal, Sumqayit.
🇺🇿 Uzbekistan & 🇹🇲 Turkmenistan
Tashkent, Bukhara Refinery, Navoiy Free Industrial Zone, Fergana, Ashgabat, Turkmenbashi Port & Refinery.
Frequently Asked Questions (FAQ)
Technical, operational, and procurement details for Darling Muesco SVC-500 Steam Safety Relief Valves.
What is the technical function of the Darling Muesco SVC-500 Safety Relief Valve?
What is the advantage of the open bonnet construction on steam lines?
Which global design codes and manufacturing standards govern the SVC-500?
What materials of construction (MOC) are used for body and internals?
Which industrial sectors use Darling Muesco Steam Safety Valves?
Can these valves be customized for balanced bellows or packed lever arrangements?
How quickly can ready stock valves be dispatched across Middle East, Africa, and CIS?
Procure Darling Muesco Steam Safety Valves
Submit your boiler parameters, operating steam temperature, set pressure, and flow rates for immediate sizing verification and commercial quotation across Middle East, Africa, and CIS markets.