Ametek ASR900, Руководство по установке и обслуживанию

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Overview
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1-5
About the Analyzer Sample System
The components of the Heated Acid Gas Sample Probe and their func-
tions are detailed below (see Figures 1-2, 1-3, 1-4.1, and 1-4.2).
Component Function
HAG Sample Probe
The HAG Probe is made up of the following components:
Sample Probe Extends into process duct to obtain a representative sample.
Sample Isolation Valve
(Red handle)
Isolates the analyzer’s sample path from the Sample Probe
that extends into the process duct.
Fiber Filter Part of the Fiber Filter Assembly, which is the first filtration
stage, this filter removes coarse particulate and some liquids.
Membrane Filter The Membrane Filter is the second filtration stage. This filter
removes fine particulate and high surface-tension liquids
(such as water, alcohols, glycols, and some amines) from the
process duct.
Sintered Disk The Sintered Disk, the third filtration stage, removes small
quantities of low surface tension liquids (such as hydrocar -
bons) that are not extracted by the first and second filtration
stages.
Aspirator Provides flow to move the sample gas through the sample
path, and the condensed sulfur (in the Sample Probe) back to
the process duct.
Flow Restrictor (in Solenoid Block)
Provides a consistent back-pressure for setting the Aspirator
Air, which reduces sample rate fluctuations caused by pro-
cess pressure fluctuations. The flow rate obtained at a gauge
pressure of 210 KPA (30 PSIG) is 30 L/min (1 SCFM).
CAUTION: To avoid plugging problems within the HAG
Probe, do not remove this fitting or replace it with a gen-
eral purpose fitting.
Vent Isolation Valve
(Black handle)
Isolates the analyzer’s sample path from the process duct.
Double Block Valve
Assembly (Optional)
This optional two valve assembly (Sample and Vent) isolates
the process gas from the upper portion of the HAG Probe,
to allow for service on the upper portion and main Isolation
Valves of the HAG Probe without having to remove the probe
from the process. (Special applications only.)
Pipe Adapter Threaded connection provides mounting of the Sample Probe
to the process duct.
Probe Heater Assembly
The Probe Heater maintains the temperature of the Sample
Probe above the dewpoint temperature to prevent condensa -
tion of liquids.
Connection Tube (Thermal Insulation Tube) This stainless steel tube encases
the Heater Cartridge wires, ground wires, and RTD cable,
and joins the Junction (terminal) Box to the Heater Assembly
(heater block).
Junction Box Contains the termination block for power, ground, and RTD
wiring for the Heater Assembly.