Overview

This document details the technical specifications, performance data, installation guidelines, and operational recommendations for Series SP and SB semi-hermetic reciprocating compressors, covering single-stage (SP) and double-stage (SB) models.

1. Compressor Types and Series

• Type: Semi-hermetic reciprocating compressors.
• Series SP: Single-stage compressors with 2, 4, 6, or 8 cylinders.
• Series SB: Double-stage compressors with 4 or 6 cylinders.

2. Motor Size and Lubrication (SP Series)

• Motor Sizes: H (full size electrical motor) and L (small size electrical motor).
• Lubrication Types: F - Pressure lubrication with oil pump; N - Splasher lubrication without oil pump.

3. Technical Specifications by Model

• Nominal Motor Power: Ranges from 3 Hp (2.2 kW) to 70 Hp (52 kW) depending on model and motor size.
• Displacement Volume: 17.5 to 222 m³/hr at 50 Hz, increasing with compressor size.
• Number of Cylinders: 2 to 8 cylinders.
• Weight: Approximately 84 kg (smallest models) to 350 kg (largest models).
• Oil Charge: Between 1.8 and 5 dm³ depending on compressor size.
• Capacity Control Steps: Step modulation typically includes 100%, 50%, and for larger models additional steps such as 66%, 33%, or 75%, 50%.
• Electrical Details: Standard motors are part winding with voltages at 230 V, 400 V (Y), and 460 V for 50/60 Hz operation. Starting and maximum running currents are specified per model.

4. Series SB Compressor Specifications

• Models SB4 and SB6 with nominal motor power from 14 to 30 Hp (10.3 to 22.1 kW).
• Displacement ranges from 43 to 103 m³/hr at 50 Hz.
• Weight ranges from 202 to 242 kg.
• Oil charge approximately 3.7 to 4.2 dm³.
• Crankcase heater power: 150 W at 230 V, 50/60 Hz.
• Discharge and suction line diameters range from 28 mm (1 1/8") to 42 mm (1 5/8").
• Starting currents and maximum absorbed power detailed per model.

5. Performance Data Under Various Conditions

• Cooling capacity (Q0), power absorbed (Pa), and coefficient of performance (COP) are provided for multiple evaporating (Tev) and condensing (Tcond) temperature combinations.
• Typical test points include Tev = 2°C, -7°C, -20°C, -35°C, -60°C with Tcond = 40°C and 50°C.
• Cooling capacities range from approximately 2.7 kW to over 180 kW depending on model and conditions.
• COP values vary from about 1.23 at very low evaporating temperatures to around 4.2 at moderate temperatures.

6. Mechanical and Installation Details

• Mounting uses M12 screws and anti-vibration rubber dampers.
• Standard SAE flare fittings for suction and discharge lines ensure proper sealing.
• Dimensions and hole patterns are specified to align with standard mounting practices.

7. Component Identification and Functions

• Suction and Discharge Shut-off Valves: Enable flow control for maintenance and safety.
• High and Low Pressure Ports: For system pressure monitoring.
• Oil Drain and Charge Valves: Facilitate oil management.
• Crankcase Heater: Prevents oil thickening in cold environments.
• Oil Level Sight Glass and Optical Sensor: Provide visual and sensor-based oil level monitoring.
• LCM Injection Connection and Capacity Regulator: Manage liquid charge and capacity control.
• Discharge Temperature Sensor: Monitors discharge temperature for system protection.
• Oil Strainer Plug: For oil filtration maintenance.
• Oil and Gas Equalization Ports: Support balanced operation in parallel compressor setups.

8. Pressure and Pipe Specifications

• Intermediate pressure connections use 1/4" SAE Flare fittings.
• Liquid subcooler pipes have a 22 mm diameter.
• Oil return from separator uses 1/8" NPT fittings.
• ISO 16 and ISO 32 standard ports are positioned on opposite sides for balanced fluid flow.

9. Capacity Control and Compressor Types

• 2-cylinder compressors have no capacity control steps.
• 4-cylinder compressors have 1 capacity control step at 50% capacity.
• 6-cylinder compressors: Series SP has 1 step at 66%; Series SB has 2 steps at 66% and 33%.
• 8-cylinder compressors: Series SP has 1 step at 75%; Series SB has 2 steps at 75% and 50%.

10. Best Practices and Critical Parameters

• Use specified flange and pipe sizes to ensure proper sealing and connection integrity.
• Install shut-off valves on suction and discharge lines for maintenance and safety.
• Monitor oil levels visually and via sensors to maintain proper lubrication.
• Employ crankcase heaters in low temperature environments to prevent oil viscosity issues.
• Utilize capacity control steps according to compressor cylinder count for efficient operation and energy savings.
• Ensure proper installation of temperature sensors and equalization ports for system balance and monitoring.
• Select compressor models based on required capacity, motor power, and operating conditions.
• Match electrical supply to motor specifications, considering starting and running current ratings.
• Follow recommended discharge and suction line diameters to maintain system efficiency and reliability.

This structured summary consolidates the essential technical data, performance parameters, installation guidelines, and operational recommendations for the Series SP and SB compressors, supporting informed selection, installation, and maintenance.