Replacement of John Crane 8B1 seal, multiple spring design,
Standard size: 1”-4.0”
Seal ring: Car, Sic, Ssic, Ceramic, TC
Secondary seal: NBR,EPDM,Viton etc.
Spring and metal parts: 304, 316, HAST.C
1. If the products we have in store, we will send it out ASAP after
2. If the products which were customized, we will complete the
production within a specified period of time, and send it out the
3. Also we can send by your delivery acount if you want.
4. We have a variety of ways to send goods, usually DHL, Fedex,
TNT, UPS will be normal ways. If you require use of a courier,
please inform us in advance.
We also supply repair service:
Fixing and Applying Directions of Mechanical Seals
1) Select Appropriate mechanical seal to match the materials
according to work conditions and host machine equipment.
2) The radial acting deviation for the shaft(shaft sleeve) of the
installed mechanical seal shall be 0.04mm by maximum
while the axial movement value of the rotor shall be no more than
3) The seal cover (or shaft cover) of the stationary ring of the
installed mechanical seals,the vertical degree of the seal
face should be 0.04mm by maximum.
4) When installing the mechanical seals,the shaft(shaft
sleeve),seal chamber,seal face as well as the mechanical seal
must be cleaned in order to keep from any medium to sealing part.
5) When conveying medium of over high or low temperature,with
medium which are easy catch fire,easy for explosion.
Related mechanical seal standards must be referred to take
appropriate measures such as quench,rinsing,coolong and
6) Appropricate lubrication must be choosen when mechanical seal is
installed.The installment size of the mechanical
seal must be guaranteed to the installment instruction.
7) Before the machine starts running,the hermetic compartment shall
be full of medium and well lubricated.Dry friction
which may lead to the damage of the air-tightness is strict
Our product includes Spring pusher seals,Rubber bellow mechanical
seals,PTFE bellow mechanical seal,Metal Bellow Seals,Cartridge
Seals,Mixer and Agitator seals,Dry Gas Seals.Besides, we can also
supply spare parts with material silicon carbide, Tungsten carbide,
Carbon ,Ceramic,rubber and stainless steel.
Our products are widely used in petroleum, chemistry, refinery,
paper making, food,pharmaceutical, textile,power,marine...
Any questions,please contact us freely.We are always here for you!