Periodical Service Of 500 Lpm Ogp And Repair To The All Allied Electrical Equipments Installed At Sdh Gandoh-- 1 Repairs to the Electrical system of the OGP plant by way of removing the defective and damaged parts and replacing them by the following items:250 kVA AVR Control Panel1. **Relays/Timers**:- Type: Electromechanical or solid-state relays/timers.- Typical Ratings:- Coil Voltage: 24V DC, 230V AC.- Contact Rating: 10A-30A at 250V AC.- Wire Size: Typically, 1.5 mm² to 2.5 mm² (14 AWG to 12 AWG) depending on the load.2. **Circuit Boards**:- Type: Control or signal processing boards.- Typical Ratings:- Power Supply: 5V DC, 12V DC, or 24V DC.- Wire Size: Typically, 0.5 mm² to 1 mm² (20 AWG to 18 AWG) for low-power control signals.3. **Terminal Blocks**:- Type: Screw-type or spring-clamp terminal blocks.- Typical Ratings:- Current Capacity: 10A-32A.- Voltage Rating: 250V AC to 600V AC.- Wire Size: Typically, 1.5 mm² to 6 mm² (14 AWG to 10 AWG).4.**Wiring**:- Type: Multi-core or single-core copper wires with PVC insulation.-Typical:- Control Circuits: 0.5 mm² to 1 mm² (20 AWG to 18 AWG).- Power Circuits: 1.5 mm² to 4 mm² (14 AWG to 12 AWG).Compressor Module Control Panel 1. **Circuit Breakers**:- Type: MCB (Miniature Circuit Breaker) or MCCB (Molded Case Circuit Breaker).- Typical Ratings:- Current Rating: 10A, 16A, 25A, 32A, or 63A.- Voltage Rating: 230V AC to 415V AC.- Wire Size: Typically, 1.5 mm² to 10 mm² (14 AWG to 8 AWG).2. **Contactors**:- Type: AC contactors for motor control.- Typical Ratings:- Current Rating: 9A to 100A.- Coil Voltage: 24V DC, 110V AC, 230V AC.- Wire Size: Typically, 2.5 mm² to 10 mm² (12 AWG to 8 AWG) depending on the motor load.3. **Current Transformers (CTs)**:- Type: Current measurement transformers.- Typical Ratings:- Primary Current: 50A, 100A, 200A, etc.- Secondary Output: 1A or 5A.- Wire Size: Secondary wiring typically uses 1.5 mm² to 2.5 mm² (14 AWG to 12 AWG).4. **Power Supply/Voltage Transformer**:- Type: Step-down transformer or regulated power supply.-Typical Ratings:-InputVoltage:230 VAC.- Output Voltage: 12V DC, 24V DC, or 110V AC.- Wire Size: Typically, 0.5 mm² to 1.5 mm² (20 AWG to 14 AWG).Complete Job Includes Cost of material, labor charges, transportation and taxes. 2 Particulate FilterTechnical Specifications1. Filtration Efficiency: 1 micron (removes fine dust and solid particulates)2. Material: Pleated synthetic fiber or borosilicate media with stainless steel mesh support3. Operating Pressure: 4 – 16 bar (58 – 232 psi)4. Flow Rate Capacity: 750LPM 5. Initial Pressure Drop: ≤ 0.1 bar6. Maximum Particle Carryover: ≤ 0.1 mg/m³7. Temperature Range: -20°C to 80°C8. Service Life: 6 – 12 months (depends on air quality and usage)9. Connection Type: BSP/NPT threaded or flanged 3 Supply & installation of Auto Drain Valves – Electronic/Pneumatic type with adjustable discharge timing (0.5 – 10 sec), working pressure 0.2 – 16 bar, voltage 230V AC/24V DC, flow capacity up to 1000 LPM, corrosion-resistant brass/stainless steel body 4 Supply & installation of Inline Filters – Ultrafilterswith 5-micron pre-filter, 0.01-micron fine filter, max working pressure 16 bar, flow rate 1000 LPM, oil removal efficiency 99.9999%, 5 Servicing of Air Dryer Unit (Cleaning, Leak Testing, and Calibration) – Includes cleaning of desiccant bed, leak detection test (helium/nitrogen-based), pressure regulator calibration (±2% accuracy), and replacement of faulty seals and gaskets 6 Testing & Commissioning of the System – Functional testing of auto drains, filter efficiency verification, dew point monitoring (-40°C to -60°C), pressure drop analysis, and real-time performance logging 7 Transportation & Handling Charges – Covers logistics, handling, and transportation of filters, valves, control panels, and associated equipment to the installation site 8 Labor Charges for Installation & Testing – Skilled technician charges for removal of defective components, precise installation of new equipment, integration with PSA oxygen plant, and trial run validation 9 Replacement of Activated Carbon Filter for 500 LPM PSA Oxygen PlantThe scope includes removal and replacement of the activated carbon filter used in the compressed air pre-treatment line of the 500 LPM PSA Oxygen Plant. The filter has a flow capacity of 30 Nm³/hr and operates at 7–10 bar pressure. It ensures oil vapor removal to <0.003 mg/m³, with particle retention ≥0.01 µm. The unit consists of a carbon steel housing and coconut-shell-based activated carbon media. Work involves depressurizing, disassembling the housing, replacing the carbon media or cartridge, resealing, testing for leaks, and recording differential pressure post-installation. 10 Compressor Oil and Filter Service for FS-Curtis 75 HP Unit (Idle for 3 Years)The FS-Curtis 75 HP rotary screw air compressor, inactive for 3 years, requires full service. The job includes draining old oil and refilling with FS-Curtis XL-700 synthetic screw compressor oil (approx. 50 liters), suitable for high-temperature, long-duty cycles. Replace the spin-on oil filter (10-micron) and air/oil separator element to ensure clean, efficient operation. Inspect and clean the air intake filter and check for internal corrosion or moisture. After reassembly, test for pressure, temperature, and unusual noise. This service restores the compressor to safe operating condition and ensures long-term reliability for PSA oxygen plant operations.
