Seeking help with packing seal issues in boiler feed water pumps
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Our chemical plant is equipped with 5 boiler feed water pumps; the GD150-80 model uses an old-style packing seal, and the manufacturer’s drawings show that 3 packing rings are installed inside the packing box, one on each side of the packing ring. Using butter-type packing gave good results, but its lifespan was only one week; graphite packing and high-water-based packing both yielded poor performance. It is manifested as better sealing on the inlet side, with hot water inside the pump on the outlet side flowing back into the cooling water (the pressure of the cooling water is about 2 kgf/cm2). Seeking help: 1. Is there an issue with the choice of filler? 2. Are there any issues with the balance pipes or balance seals on the inlet and outlet sides of the pump? 3. Which master can help me?
You can try Gore Teflon packing; it’s quite good, though it’s more expensive
It can be modified into a mechanical seal. Mechanical seals are now used quite well.
Thank you all. There are currently two obstacles to replacing the mechanical seal. 1. The original design for the cooling water was to use ordinary circulating water, with a water pressure of 0.3 MPa; the water quality was not suitable. 2. The process system is in operation, and the original manufacturer has stated that the pump needs to be returned to the factory in order to complete the repair.
Carbon fiber can be used, making it suitable for high-temperature conditions.
Our company specializes in seals imported from Germany, focusing on seals that can operate at ultra-low temperatures of -270°C, as well as at ultra-high temperatures of +1100°C. They are also suitable for high pressures up to 680 MPa, and exhibit excellent corrosion resistance. We offer both dynamic and static seals; the dynamic seals can handle speeds of up to 40 m/s (or even higher). For more information, please contact 18678860293 via VX