MAX300-RTG: Installation Manual Hardware Installation
31
Plumbing Connections
Sample Lines
The MAX300-RTG is a gas analyzer and requires the sample to be delivered in a
vapor phase. A heat traced sample line, if needed, must be provided by the
customer. All sample lines connecting to the instrument must conform to all local
safety regulations and be of a material compatible with the sample stream.
The MAX300-RTG with direct inlet is equipped with a flow status switch which
indicates failure if the flow falls below 50 cc/min. The recommended sample flow
is approximately 100 cc/min; however this will vary depending upon length and
size of the tubing used for plumbing; therefore flow meters are not required. Please
refer to the following figures for location of the flow switch.
Table 3: Flow approximations for different type of valves
(Approximate) Recommended Flow
Rotary: 1/16” 16 ports
1/8” 16 ports
FAST Valve: 40/80/120 160 port
Note: The Sub Ambient Sampling assembly does not contain a flow switch due to
the fact that the actual gas flow will not activate the flow switch.
Rotary Valve Inlets
The recommended tubing size from the sample and calibration gases to the mass
spectrometer is 1/16” OD, 0.030 ID stainless steel tubing with compression fitting.
Using the recommended tubing will help minimize sampling delays. Please see
Figures 13 – 19 below for plumbing sample lines and connections.
Please refer to a diagram of the valve, Figure 16. When viewed from the
plumbing side of the valve, the ports are identified as follows:
The common outlet port is segregated from the other ports, and is nearest
the valve actuator.
Inlet ports are arranged in the row next to the common outlet. Inlet port #1
is the next position CCW from the common outlet port, and inlet ports are
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