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    E-21 type, replacement product of John Crane 21 type, Rubber bellows type mechanical seal Temperature: -40~+205℃ Speed: 13m/s Pressure: 1Mpa

Installation drawing and size of E-21.pdf

Suggested operating limits

Temperature: -20 ~120℃

Speed: ≤15m/s


Combined material

Rotary face: Carbon/Sic/TC

Stat Ring: Ceramic/Sic/TC

Seat Type:Standard G55 W


⑴The drive band's "dent and groove" design eliminates overstressing of the elastomer bellows to prevent bellows slip and protect the shaft and sleeve from wear.

⑵Non-clogging, single-coil spring provides greater dependability than multiple spring designs and will not foul due to fluid contact.

⑶Flexible elastomer bellows automatically compensates for abnormal shaft-end play, run-out, primary ring wear and equipment tolerances.

⑷Also we could manufacture seals according to your drawing, and design as your request.

Installation size and drawing of 21 type for John Crane