An Medical Gas Pipeline System is designed to provide a safe and effective method of delivering medical gases, medical air and surgical air from the source of supply to the appropriate terminal unit by means of a pipeline distribution system. Medical vacuum is also provided by means of a pipeline system. Anaesthetic gas scavenging disposal systems are provided to control occupational exposure to waste anaesthetic gases and agents.

Basic principles of design:

Patient safety is paramount in the design, installation, commissioning and operation of medical gas pipeline systems. The basic principles of safety are achieved by ensuring:

  1. Quantity of supply
  2. Identity of supply
  3. Continuity of supply
  4. Quality of supply.

General uses of gas and pipeline installations :

Oxygen is one of the most extensively used gases for respiratory therapy and life-support and is additionally used in anesthetic procedures.

Medical air is mainly used in respiratory therapy as a power source for patient ventilators, and for blending with oxygen. It is also used as the driving gas for nebulized drugs and chemotherapy agents.

Surgical air (of medical air quality) is also used, at a higher pressure, to power a variety of surgical tools and other devices such as tourniquets. (As an alternative, nitrogen can be used for this purpose.).

Nitrous oxide is used for anesthetic and analgesic purposes, being mixed with air, oxygen, and nebulized agents.

Carbon dioxide is used less commonly now as a respiratory stimulant, and for insufflation during surgery.

Piped vacuum is provided in most clinical areas by means of centrally sited vacuum pumps.

The control of occupational exposure to waste anesthetic gas (nitrous oxide) and nebulized agents is a legal requirement under the Control of Substances Hazardous to Health (COSHH) Regulations 2002. Where nitrous oxide is provided for anesthetic purposes, scavenging systems are installed (AGSS).

Sources of Supply :

Both BS EN 737-3:2000 and ISO 7396-1:2002 propose that all medical gas supplies should comprise three sources of supply identified as “Primary”, “Secondary” and “Reserve / Emergency”.

Alarm Systems for Medical Gas Panels



The medical gases alarm panels are designed to remotely monitor the signals of medical gases installations with uninterrupted visual and sound notification capabilities to technical service personnel according to HTM 02-01.

The digital display of line pressure in psig (mm of hg in case of vacuum) with audio visual alarm for high & low pressure.

The entire system is microprocessor based for single gas to four gas systems including vacuum also blinking display for high & low alert. Calibration has been made as per ISO standards.

  1. Area Gas Alarm Digital (Single)
  2. Area Gas Alarm Digital (2 Gas)
  3. Area Gas Alarm Digital (3 Gas)
  4. Area Gas Alarm Digital (4 / 5 Gas)



Anesthetic Gas Scavenging System



Scavenging is the collection and removal of vented anaesthetic gases from the OR. Scavenger and operating room ventilation efficiency are the two most important factors in reduction of waste anaesthetic gases (WAGs).
Amount of anaesthetic gas supplied usually far exceeds the amount necessary for the patient, OR pollution is decreased by scavenging
An effective scavenging system can reduce ambient concentration of waste gases by up to 90%.
The AGSS offered by Unissi complies with HTM 02-01, HTM2022 and either EN ISO 7396-2 or BS 6834. The AGS system shall be a dedicat¬ed, specifically designed active extraction and dispos¬al system for waste anaesthetic gas.
The AGS system use dedicated radial blowers in a simplex or duplex configuration. The AGS pump assemblies shall be skid mounted and included on the skid shall be the simplex or duplex pump(s), motor control unit(s) with starter/ isolator, moisture drain flask and flexible connector(s) to connect the plant to the pipeline. Each pump shall include an electric motor and directly coupled impel¬ler assembly. Impeller bearings in the pump(s) shall not require lubrication. The pump(s) shall be air cooled and rated for continuous operation.



Bed Head Panels



Unissi is into fine quality durable manufacturing of Bed head units which are popularly used in Hospitals, Nursing homes for variety of functions.
The Bed head units are made of high-quality aluminium extruded profile.
TBed Head unit allows a multi spectral placement of medical gas outlets and low voltage electrical installations. It may also include built in treatment lamp with indirect lighting and nurse call system.



Copper Pipes



Area Valve Service Unit – The ASVU are fitted to all medical gas and vacuum services in a prominent and accessible position at the entry to wards, theatres, intensive care, recovery rooms, etc. The ASVU panel is conforming to EN ISO 7396-1, HTM 02-01 standards and contains in a metal box shut-off valves, pressure gauges, gas-specific connectors and low-high pressure switches.

Area Valve Service Units are manufactured under ISO standard. They provide a local gas isolation facility for use during normal installation and maintenance or in the event of an emergency. They are built in accordance with the HTM02-01 and are suitable for Oxygen, Nitrous Oxide, MA4, MA7, CO2 and Vacuum.



Gas Outlets



Gas outlets are used in hospitals for supply of various gases such as Oxygen, Vacuum, Nitrous, Co2 , Air (4 & 7 Bar) in the most efficient and fast way using special quick-action connection fittings. Gas outlets are suited for external or internal wall mountings, for bed head units and for ceiling pendant installations.

The Units Comprise of a First Fix, Second Fix and A Second Fix Valve Assembly and Connect Medical Appliances to The Gas Supply System.

Two-part outlets are composed of the base finishing part which complies to the EN ISO 7396-1 2, EN ISO 9170-1 2 standards.

The Gas outlets are Designed to Enable Gas Probes to Be Connected and Disconnected Easily and with Minimal Effort and The Same Time as Giving A Strong, Reliable And Secure Connection. They Are Available for Oxygen, Nitrous Oxide, Medical Air, Surgical Air, Medical Vacuum, Carbon Dioxide, Nitrogen Gas Outlets. The Terminal Units Can Be Flexibly Integrated into any type of Installation Including Surface, Flush.


  1. Dimensional Accuracy Providing Fine Finish
  2. Optimum Performance
  3. Easy to use



Medical Vacuum System


Unissi rotary vane vacuum pump is to meet with NFPA 99 HTM Standards multiple vacuum pumps, receiver tank and control panel.

The medical vacuum system is equipped with 2 to 4 vacuum pumps. The vacuum pump is available in both oil-lubricated and oil-free type. Each pump includes oi level sight glass, anti-suck-back valve filter. System are manufactory in ISO9001 system to ensure high quality. The system are available in two configuration types: vertical tank and horizontal tank mount.

The system is equipped with duplex bacteria filter to ensure the purity of the gas entering the vacuum tank, and is equipped with a lcd control cabinet to control the fully automatic operation of the vacuum pump.



Oxygen Flowmeter



Oxygen Flow meter’s are supplied with probes and only attach to the corresponding medical gas terminal unit, it accurately measures flow at 0-15 Lpm even at variant inlet

Pressures Accuracy is fulfilled within + 10% of scale value or 0.2 LPM which ever (as per ISO 15002) is higher to attain maximum efficiency for patient and environment.

Each flow meter is calibrated at 50 psi inlet pressure

Flow meter also available at a flow rate 0-5 for pediatric Life saver

It is constructed from chromium-plated brass body, inner and external tube in crack resistant polycarbonate and stainless-steel ball.

The humidifier bottles also available with Inlet filter of stainless steel (SS316) wire mesh to prevent entry of foreign particles.



Master Alarm



Master Alarm are required for all the medical facilities with medical gas systems. Master alarm monitors the source equipment, Manifold, Compressed air system, Vacuum System. It monitors the Line pressure and has audio and visual alarms.



Medical Gas Alarm



Gas Alarm also known as Area alarm (Visual and Audio) are for monitoring zones throughout the hospital/ Medical Facility as well required in Critical areas. Area alarms are installed to monitor the pressure within wards / Floors / Critical Areas.

1. These come with Analog / Digital display and satisfies the requirement of the HTM02-01, HTM 2022 and ISO 7396-1.

2. Sensor Detective

3. Pre alarm for high / Low pressure conditions

4. Audible & Visual signal when a fault condition occurs.



Zonal Valve Box

10_Zonal Valve Box


Zonal valve box is used in the medical gas pipeline to allow maintenance of individual zones without disturbing the gas flow to other zones or to stop distribution / supply of gasses to individual zone in case of emergency. The valve box designed are to allow control of up to 6 gasses.

1. Designed to house up to seven shut off valves and each valve controls a different gas.

2. Gas service is distinguished by label color.

3. Wall mount Style

4. Copper tubes are welded to prevent leakage

5. Tubing is 100% tested for leakage



Vacuum Station

11_Vacuum Station


It provides the required suction and the planned flow of medical vacuum for needs of vacuum suction. A very important part is treatment and cleaning of contaminated exhaust air. Therefore, it is necessary to equip each vacuum station in automatic model with perfect antibacterial filter and dirt arrester.



Compressed Air System

12_Compressed Air System


Compressed Air system provides the required pressure and the planned flow of medical compressed air at 4 Bar & 7 Bar. These are stationary units available in several options eg: Oil free , Oil Lubricated , Reciprocating etc



Automatic Manifold System

13_Automatic Manifold System


Automatic Manifold system provides continuous gas flow.

Unissi offers Fully automatic control panel as well as Semi-automatic control panel.

The control panel comes with Analog / Digital display to display the pressure of each incoming bank (Right or Left) and mainline gas pressure.

As soon as the gas in one bank runs below the set pressure the control panel it sounds an alarm. The fully automatic control panel switches the bank automatically whereas it is manually changes in case of Semi-Automatic control Panel.

The Display includes LED lights to indicate working conditions and alarms.

The panel comes with Modbus interface for BMS connectivity.