Oil Injected Screw Technical Data Sheet

Product catalog summary

Overview: The document provides comprehensive details on the BeaconMedæs Medical Air System, which is designed for hospital use. It features modular base-mounted designs with oil-injected rotary screw compressors, air purification modules, and air receivers. The system adheres to EN ISO 7396-1 and NHS HTM02-01 or HTM2022 standards, ensuring the delivery of medical quality air at specified pressures.

Specifications: The system includes duplexed components for reliability, with CE-marked devices under the Medical Devices Directive 93/42/EEC. Compressors are available in both fixed and variable speed options, featuring high-definition displays, automatic restart, and energy-saving capabilities.

Air Purification Module: This module comprises high-efficiency water separators, oil coalescing filters, desiccant dryers, and bacterial filters to maintain contaminants below specified thresholds. Options for hopcalite filters and electrical contacts for monitoring are available.

Control System: The central control system provides an intelligent interface with real-time monitoring and automatic rotation of compressors and dryers to extend their lifespan. It includes a Purge Saver Energy Management system and dew point monitoring for air quality assurance.

Receiver Assembly: Air receivers comply with PED 2014/68/EU standards and feature pressure safety valves and electronic drain valves. Optional enhancements include synthetic oil, tropical sensors, and CO/CO2 monitors.

Condensate Management: The system incorporates Atlas Copco’s OSC for oil removal from condensate, ensuring environmental compliance and easy maintenance.

Unique Selling Proposition: The GA MED and GA VSD+ MED compressors offer robust design, advanced monitoring, and energy efficiency. The dMED Purification Module provides a compact, service-friendly air purification package with advanced medical controls.

Combined Air Plant Sizing Guide: Guidelines are provided for sizing combined medical and surgical air systems according to HTM02-01 standards. It emphasizes calculating both medical and surgical design flow rates to determine appropriate receiver and compressor capacities. A duplex regulating station is required for all combined air systems.

Surgical Air Compressors: A table outlines surgical air plant flow rate multipliers based on the design flow rate. For example, for flow rates less than 500 L/min, the multiplier is 0.33 times the DF, while for rates between 500-3500 L/min, it is 0.66 times the DF.

Example Calculations: Two examples illustrate the sizing process:

Small Day Treatment Centre: Combined design flow rate is 1693 L/min. A dryer with an outlet flow greater than this is recommended. Compressor flow rate is 1535 L/min, including purge losses. Receiver capacity is 1796 litres, with a selected capacity of 2000 litres.
Large District Hospital: Combined design flow rate is 7808 L/min. A dryer with an outlet flow greater than this is recommended. Compressor flow rate is 8789 L/min, including purge losses. Receiver capacity is 5348 litres, with a selected capacity of 6000 litres.

Compressor and Receiver Selection: Tables are included for selecting compressors and receivers based on parameters such as output flow, footprint, weight, and noise level. Specifications for both fixed speed and variable speed drive compressors are detailed.

Dryer Selection: Dryer performance data is provided for different pressure systems (4 bar, 7 & 8 bar, and 10 bar). Tables for selecting dryers based on inlet and outlet flow rates, along with part numbers for different configurations, are included.

General Notes: Additional notes highlight the importance of considering design flow in terms of free air delivered, component dimensions for plant room arrangement, and compliance with HTM02-01 standards. Electrical details are provided for guidance, and bespoke configurations are available if standard models do not meet requirements.

Compressor Types: The compressors used are GA MED Fixed Speed Screw Compressors and GA MED VSD+ Variable Speed Screw Compressors, operating at different pressure levels (7.5 bar, 10 bar, 13 bar) depending on the model.

Dryer Types: The dryers used are dMED dryers, with specifications varying according to the pressure level they are designed to operate at.

Receiver Specifications: The number of receivers and their volumes vary across models, with volumes ranging from 250 liters to 3000 liters, and pressure ratings typically at 11 bar or 14 bar.

Model Configurations: Each model is identified by a unique name and description, indicating its specific configuration and intended application. Part numbers for configurations with and without vessels are listed.

Key Data: Tables provide a comprehensive breakdown of design flow rates, actual plant flow rates, and other critical parameters for each model, essential for understanding the capacity and performance of each system.

Applications: The systems are designed for a 50/50 split of medical and surgical air design flow, ensuring versatility and adaptability in various healthcare settings.

Catalog excerpts

Oil Injected Screw Technical Data Sheet-1

mAIR Medical Air, cAIR Combined Air & sAIR Surgical Air Systems EN ISO 7396-1/HTM 02-01 and HTM2022 EurPh 400V 50Hz, 4 Bar, 7 Bar, 8 Bar & 10 Bar Outlet Oil Injected Screw Compressors SPECIFICATION Air Plant System The Medical Air System is a modular base-mounted design consisting of oil-injected rotary screw compressor modules with fixed or variable speed drive, a duplex air purification module with central controller, and air receiver modules. The Air System shall conform to EN ISO 7396-1 and NHS Health Technical Memorandum HTM02-01 or HTM2022. Medical quality air to the European Pharmacopoeia monograph shall be delivered at pressures of 400 kPa (4 bar), 700kPa (7 bar) or 1000 kPa (10 bar) gauge for supply of the hospital medical or surgical air systems. controller. The compressor shall have the following features as required by HTM02-01/HTM2022: Medical Air Systems shall be duplexed such that any single functional component failure will not affect the integrity of the medical compressed air supply. Variable Speed Compressors Alternatively, compressors shall be Atlas Copco GA VSD+ MED single-stage oil injected rotary screw compressors fitted with Variable Speed Drive. By including an AC-DC converter, along with associated control hardware and software it will enable the compressor to continuously match its running speed with the flow demand required by the hospital. By using such technology, start currents will be reduced, machine life will be prolonged and energy savings of up to 50% shall be achievable. The compressor shall operate from 400- 1300kPa (4-13 bar) gauge. Surgical Air Systems shall have a duplex air purification module and a simplex compressor. Additional compressors shall be available to duplex the compressors, such that any single compressor failure will not affect the integrity of the air supply. The Medical Air Systems are CE-marked under the Medical Devices Directive 93/42/EEC with approval from notified body no. 2460 (DNV GL Presafe AS). Under this directive, the specified products are classified as Class IIb Medical Devices. Sources of Supply HTM02-01/EN ISO 7396-1 The Medical Air Plant System will produce the primary supply with two compressors on standby (unless an automatic manifold is used as secondary (HTM02-01) or third (ISO7396-1) supply). For duplex plant, the secondary (HTM02-01) or third (ISO73961) supply shall be an automatic manifold. For triplex plant, each compressor can supply the total hospital flow. If more than three compressors are installed, the total hospital flow will be split over multiple compressors. HTM2022 The Medical Air Plant System will produce the primary supply with one compressor on standby. For duplex plant, each compressor can supply the total hospital flow. If more than two compressors are installed, the total hospital flow will be split over multiple compressors. The back-up compressor will form the secondary supply. A third supply shall be from an automatic manifold capable of supplying the average hospital demand for 4 hours. Compressor Modules Fixed Speed Compressors Compressors shall be Atlas Copco GA MED single-stage oil injected rotary screw compressors suitable for both continuous and frequent start/stop operation at a nominal outlet pressure of 750 kPa (7.5 bar), 1000 kPa (10 bar) or 1300 kPa (13 bar) gauge. Compressors shall be supplied with a block and fin style after cooler with a dedicated quiet running fan to maximise cooling and efficiency. A multistage oil separator capable of achieving 2ppm oil carry-over shall be fitted to minimise contamination and maintenance. Minimum EFF1 (CEMEP) rated, IP55 class F electric motors shall be used and incorporate maintenance-free bearings. Motors with lower efficiency ratings are not acceptable. The compressor shall be fitted with a high-definition colour display • Ammeter • Main switch • Temperature sensor downstream the aftercooler • Failed-to-go-on-load feedback pressure switch • Automatic restart after voltage failure The compressor shall be fitted with an oil-cooled permanent magnet synchronous motor of minimum IE4 efficiency class and IP66 pressure-tight ingress protection. The motor bearings shall be oil-cooled and maintenance free. The motor shall be directly connected to the screw element without gearbox nor belt. The motor and screw element shall be fitted in a vertical position to limit the footprint of the compressor. The compressor shall be fitted with an inlet valve to avoid depressurization losses during stop (no unloading). A multistage oil separator capable of achieving 2ppm oil carry-over shall be fitted to minimise contamination and maintenance. The noise level of the compressor shall be maximum 67dB(A). The compressor shall be fitted with a touchscreen controller and electronic no-loss water drain with integrated manual drain for efficient removal of condensate without loss of compressed air. Compressors shall be supplied with a block and fin style cooler with a dedicated quiet running fan with biomimetic, serrated fan blades to maximise cooling and efficiency Full VSD air plant shall incorporate VSD controllers on all compressors, cycling the lead compressor to ensure even wear as per HTM02-01 requirements. The compressor shall have the following features as required by HTM: • Ammeter • Main switch • Temperature sensor downstream the aftercooler • Failed-to-go-on-load feedback pressure switch • Automatic restart after voltage failure BeaconMedæs • Telford Crescent, Staveley, S43 3PF, United Kingdom • Phone +44 (0) 1246 474 242 • www.beaconmedaes.com AIR SYSTEM OIL-INJECTED SCREW

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Oil Injected Screw Technical Data Sheet-2

Air Purification Module Dryer and filter system The duplexed air purification module shall incorporate high efficiency water separators, oil coalescing filters, heatless regenerative desiccant dryers, activated carbon filters with optional hopcalite catalyst, bacterial filters and pressure regulators. The performance of the filters shall be according to below specifications: • Oil coalescing two-in-one high efficiency filter: mass efficiency of 99,991%, tested according to ISO 8573-2 & ISO 12500-1 • Activated carbon filter: max remaining total oil content of 0,003 mg/m³, tested according to ISO...

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