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Zhangjiagang city sinochem mechanical seal co., LTD
Address:Zhangjiagang cityof nahuy road industrial development zone
Tel:086-0512-58670570
Fax:086-0512-58185129
Contact Person:MR
Zip Code:215636
Website:www.zhjxmf.com
E-mail:webmaster@zhjxmf.com
Technical guidance
Mechanical seal flush solution and characteristics
Flushing purpose is to prevent impurities set product, prevent air bag forming, maintaining and improving lubrication, etc., when flushing fluid temperature is low, and cooling effect. Rinse the way are mainly as follows:
Rinse in one,
1. Is flush
Features: (1) using the work of the host by sealing medium, passed by pump outlet pipe into the sealed cavity.
(2) application: used in cleaning fluid, p1 is slightly greater than p, when high temperature or have impurities, can be set up on tube cooler, filter and so on
2. Back flush
Features: (1) using the work of the host by sealing medium, introduced by the outlet of the pump seal cavity, after washing by flow back to pump suction line.
(2) application: used in cleaning fluid and p into 3. Rinse all
Features: (1) using the work of the host by sealing medium, by the pump outlet seal cavity, introduced through the pipeline, flow back to pump inlet flushing after concession road.
(2) application: cooling effect is better than the first two, used for cleaning fluid, and p1 and p and p into the close.
Second, the washing outside
Features: the introduction of outside system compatible with the sealed medium cleaning fluid to seal chamber to wash.
Application: external flushing fluid pressure should be larger than the sealed medium 0.05-0.1 MPa, suitable for medium to high temperature or the occasion of solid particles.
Flushing fluid flow should guarantee the take away heat, still need to meet the needs of flushing, won't produce erosion of the seals. Therefore, the need to control sealing cavity pressure and the flushing flow velocity, generally clean washing fluid flow rate should be less than 5 m/s; Slurry liquid containing particles must be less than 3 m/s, to achieve the velocity value, rinses with seal chamber pressure difference should be < 0.5 MPa, generally take a 0.05-0.1 MPa, the double mechanical seal may take 0.1-0.2 MPa.
Flushing fluid into position and discharge seal chamber orifice, should be set up near the seal face, and should be near the ring side, in order to prevent the graphite rings by erosion or deformation caused by uneven cooling temperature difference, and impurity accumulation and coking, can be used to introduce or cut more flush.
When necessary, the flushing fluid may be hot water or steam.