Wall outlet supplies 50 psi

Wall connectors are gas specific using DISS (Diameter Index Safety System, color coding, and labeling

Machines pipline inlet contain a check valve to prevent gas leakage if not connected to wall

Tank O2 supplied from E-Cylinder attached via yokes

Pressure straighten tube out

Gauge should be able to read 33% higher than maximum working pressure

Gagues must have heavy back and front glass plates in case of bourden tube rupture 

Used to reduce and maintain pressure

Converts variable high pressure input to constant low pressure output

Pressurization of regulator chamber closes input diaphragm

Diaphragm opens as regulator decompresses

Decrease pressure below pipline, so mainly use pipline

Tanks off when not in use

Flush Vavle

Oxygen supply Failure Alarm

Pneumatically Powered Devices

Oxygen Failure Cutoff (Fail-Safe) Valve

Flow Meters 

35-70 L/m at 50psi

Barotrauma can result in certain conditions 

Shuts off other gas flow if O₂ pressure falls below 20-25 psi

Does NOT prevent hypoxic mixtures 

Input pressure considerably lower from tanks (745 psi)

Flow pathway from N20 is fail-safe valve to flow meter 

Same as N₂O

May not interact with Oxygen Failure Cutoff Valve at all 

Used to control mixtures of medical gases 

Each gas may use one or two rotameters

Tapered glass larger at the top, allow consistant pressure with variable flow, by changing resistance

Accuracy improves with higher flows 

Positioned on the right

Control knob is scalloped 

Made of aluminum

Tubes and floats not interchangable- gas specific 

Electrostatic changes and dirt may hamper free float movement 

Area around the float acts as a constrictor producing turbulent flow

Gas density is the major flow rate factor

Laminar flow is present 

Viscosity becomes the major factor in gas flow

Have similar varicosities 

Their flow meters could be interchanged at low flows 

Have similar densitites

Flow meters could be interchanged at high flows 

Must be vertical

Changes in barometric pressure may cause rotameter to become inaccurate 

Will Cause the float to rise too high for a given flow rate 

Never gives a fresh gas mixture with less than 25% oxygen content 

Control the nitrous/oxygen mixture

THerefore other gases could be added to make hypoxic mixture 

Link-25 System

Incorporate a check vavle and pressure relief vavle at common gas outlet 

Oxygen Ratio Monitor Controller

(ORMC)

Fresh gas from flow meters and added volatile agents exit the machine here

15 mm fitting with a retaining device