Installation Recommendations; Steam Or Clean Liquids Flow Measurement; Gas Or Liquid Flow Measurement - ABB 266 HART Series Operating Instruction

5.14 Installation recommendations

Impulse piping configuration depends on the specific
measurement application.
5.14.1 Steam (condensable vapor) or clean liquids flow
measurement
— Place taps to the side of the line.
— Mount beside or below the taps.
— Mount the drain/vent valve upward.
— In case of steam application fill the vertical section of the
connecting lines with a compatible fluid through the filling
tees.
The process fluid must enter the transmitter primary:
1. Open equalizing valve (C).
2. Close low pressure (B) and high pressure (A) valves.
3. Open gate valves.
4. Slowly open high pressure (A) valve to admit process fluid
to both sides of primary.
5. Vent or drain the primary unit and then close the valves.
6. Open the (B) valve and close the equalizing valve.
Figure 31: Steam or clean liquid flow measurement
(transmitter and manifold)
5.14.2 Gas or liquid (with solids in suspension) flow
measurement
— Place the taps to the top or side of the line.
— Mount the transmitter above the taps.
The process fluid must enter the transmitter primary:
1. Open equalizing valve (C).
2. Close low pressure (B) and high pressure (A) valves.
3. Open gate valves.
4. Slowly open high pressure (A) valve to admit process fluid
to both sides of primary.
5. Vent or drain the primary unit and then close the valves.
6. Open the (B) valve and close the equalizing valve.
Figure 32: Gas or liquid flow measurement (transmitter and manifold)
Caution. Manifolds can be supplied both mounted on pressure
transmitters and loose. In case of integral mounting, consider that:
— All adjustments should be carried out by qualified personnel with
the valve without pressure.
— End connections must not be removed from the body.
— Do not use handle wrenches or extensions to operate the
valves.
— Head units must not be removed once installed.
— Do not cover or remove body marking.
Important. The maximum working temperature of the whole
assembly (manifold and instrument) corresponds to the temperature
limit of the pressure transmitter.
Important. When the manifold is assembled to a 2600T pressure
transmitter with NACE compliance A4-50 Stainless Steel bolts
(available on request), please note that the maximum working
pressure is limited to 210 bar (3045 psi).
2600T Series Pressure transmitters | OI/266/HART-EN Rev. M 25
5 Mounting