ASPIRATION SYSTEMS
The Gas & Smoke Aspirator System is a unique solution to accurately monitor gas and/or smoke ingress in areas where it is not practical to place a detector. Aspirator systems detect specific components in a gas stream flowing through a duct by taking a sample of the gas and sending it to an external instrument for measurement. External monitoring provides much higher reliability than the in situ approach because the instrument sensor and transmitter are mounted outside of the duct. This reduces the cost of the measurement device and extends the life of the instrument’s sensor since it is not exposed to high heat or humidity.
Features
> Modular standard component design
> Built in line purge and calibration gas buttons per channel (Optional)
> Low flow alarm per channel (Optional)
> Suitable for use in Zone 1 & 2 hazardous areas
> Explosion-proof pump version available
> Aspirator internals are H2S resistant
> SIL rated low flow alarm available
> Industry standard gas or smoke detectors can be utilized
Benefits
> Easy, quick, and economical maintenance
> Choose any detector
> Samples can be drawn from negative pressure areas
> Monitor for sample line blockages
> Suitable for sour gas applications
> Fail safe sample line clearance and detector testing
> Can be utilized in high temperature applications
> Can be used in low temperature applications
TECHNICAL SPECIFICATIONS
Instrument air pressure
Regulator
Instrument air consumption
Aspirator response time
Vacuum drawn by Aspirator
Mounting options
15–150 psi
0–4 bar (0–58 psi)
1.0 L/min/channel @ 28 psi
3 s to pass through aspirator module + 0.25 to 0.75 s/m
of sample line, depending on detector type
250 mmHg (133'' H2O gauge) - Input pressure @ 28 psi
316 stainless steel cabinet or a stainless steel back plate
Applications
> Ingress of flammable gas, toxic gas, and smoke into HVAC ducts
> Flammable gas in riser caissons
> Protection of safe refuges
> Flammable gas entering combustion air, ventilation air intakes and ventilation exhausts of gas turbines
> Flammable gas leaks under acoustic enclosures of gas turbines
> Flammable gases in moon pool areas and turret annulus spaces in FPSO’s
> Leaks from the gas seals of gas compressors
> Hydrocarbon break-through in nitrogen blanketed expansion vessels
> Flammable gases in subsea depressurization tanks and crude oil storage tanks
> Gas build up beneath gas tight floors
> Hydrogen sulphide in drilling areas
> Gas build up in cargo holds and ballast tanks
> Gases in low or high operating temperatures