How would you do Glycol filling or fill seal liquids in seal pots at transmitter impulse lines?
The procedure for glycol filling or filling seal liquids in seal pots at transmitter impulse lines typically involves the following steps:
Close the Primary Isolation Valves
- Begin by closing the primary isolation valves on both the high-pressure (H.P.) and low-pressure (L.P.) sides of the seal pots.
- This step ensures that the seal pots are isolated from the process fluid during the filling process.
Open the Vent on the Seal Pots
- Locate the vent valves on the seal pots and open them.
- This allows any trapped air or gases to escape as the glycol or seal liquid is being filled.
Drain the Used Glycol (if present)
- If there is any used glycol or seal liquid already present in the seal pots, drain it completely before proceeding with the filling process.
- Ensure that the drain valves are fully opened and the liquid is properly disposed of according to safety and environmental regulations.
Attach a hand pump to the LP side
- Connect a hand pump or an appropriate pumping mechanism to the L.P. side of the seal pot and impulse line.
- This pump will be used to fill the H.P. side of the seal pot with glycol or seal liquid.
Fill H.P. Side with Glycol
- With the L.P. side valve closed and the equalizer valve open, start pumping glycol into the H.P. side of the seal pot and impulse line.
- Monitor the level of glycol or sealing liquid is come out from the seal pot drain . Continue pumping until the desired level and air locks removed.
Repeat for L.P. Side
- After filling the H.P. side, disconnect the pump from the L.P. side of the seal pot. Connect the pump to the H.P. side and keep the equalizer valve open.
- Close the H.P. isolation valve. Repeat the pumping process to fill the L.P. side of the seal pot with glycol or seal liquid.
Close the Seal Pot Vent Valves and plugs
- Once both sides of the seal pots are filled with glycol or seal liquid, close the vent valves on the seal pots.
- This prevents any further air or gases from entering the seal pots.
Close the Equalizer Valve
- Close the equalizer valve once the filling process is complete.
- This isolates the H.P. and L.P. sides of the seal pots, ensuring independent functioning.
Open Both Primary Isolation Valves
- Finally, open both the primary isolation valves on the H.P. and L.P. sides of the seal pots.
- This allows the process fluid to flow into the seal pots and establish the required differential pressure for accurate measurements.
It is important to follow safety procedures, wear appropriate personal protective equipment (PPE), and adhere to local regulations while performing these tasks.Additionally, consult the specific guidelines provided by the manufacturer of the seal pots and follow any site-specific procedures or requirements.