The choice of the sealing gasket

Select gasket, weaknesses,Spiral Wound Gaskets and give full play to the characteristics of the various gasket.

 Choice of gasket, the following requirements:
(1)) good elasticity and recovery, able to adapt to changes in pressure and temperature fluctuations;
(2) appropriate flexibility, with the contact surface to fit:
(3) does not pollute the process medium;
(4) sufficient toughness without damage due to pressure and tightening force;
(5) low temperature hardening, small amount of shrinkage; does not soften at high temperatures, good creep resistance in Hangzhou;
(6) processing performance, installation, pressed;
(7) not bonded sealing surface, easy to remove;
(S) cheap, long life mouth
 In the gasket is in use, the pressure and temperature both are mutually constrained, gasket material softens as the temperature rises, after a period of time in the operation of equipment, creep, stress relaxation phenomenon, the mechanical strength will decline , sealed pressure reduction. Vice versa. For example, high-pressure asbestos rubber sheet XB450 water, steam Ring Joint Gaskets medium temperature 4500C, pressure <6mpa (to do with the material sealing performance test, at 440 450 ° C, 12MPa steam mediator pressure for 30 minutes). However, in the long-term practical use, if the temperature reaches 450 ° C, that can be sealed pressure only 0-3 4 MPa port for strong penetration of the gaseous medium is only 0 1 0 2 MPa.