Hemisphere pneumatic valve and ball valve, pneumatic butterfly valve, pneumatic valve to the comparison

See the original 【 Ministry of chemical industry science and technology achievement appraisal certificate 】 , its core technology is a domestic initiative, its unique design, novel structure, has won five patents. Products on the market for the past five years, by the customer's approval, order scope expands unceasingly, indeed in different situations to replace the pneumatic ball valve, pneumatic butterfly valve, brake pneumatic valve, pneumatic valve, and other than on earth where the good?
a, structure on the eccentric - chocking principle. Pneumatic valve and pneumatic rotary valve core center ( The pneumatic valve stem axis) And pneumatic valve core sealing spherical geometric center offset a radial size, also with pneumatic valve seat sealing surface has a bias in pneumatic valve body channel axis dimension, sealing pair under external force for the metal to metal contact, achievement by two eccentric pneumatic valve self-locking closed, the reasonable choice of eccentric makes latching Angle is less than the friction Angle, Angle of self-locking chosen too small to shut down easy, open, difficult Angle choose big, although the open force is small, but close the torque increases rapidly, test rig of trial and error, determine the two reasonable collocation of eccentricity is essential, reliable self-locking performance to ensure the sealing tightness. This is the core of the hemisphere pneumatic valve technology, from the structure principle, through the manufacturing methods to achieve the best sealing, pneumatic ball valve, pneumatic butterfly valve, brake pneumatic valve, pneumatic valve up to now, there are inferior.
2, easy to implement and maintain zero leakage for a long time. Pneumatic valve core and pneumatic valve seat seal is spherical line contact, by eccentric realize self-locking, seal the opening and closing the whole process of little contact, only at the instant of the opening and closing, will contact and brake tight zero leakage, ensure no leakage point of dynamic and static seal. Pneumatic scaling or other debris on the seat, pneumatic valve core in the process of contact with pneumatic valve seat, has a strong ability to remove fouling. Pneumatic valve sealing surface of the brake in the opening and closing of the frequent reciprocating motion, mixed flow medium scale deposition in the lower part of pneumatic valve body cavity, the achievement by the positive pressure pneumatic valve completely sealed, pneumatic seat scale without cleaning ability, the packing often repeated wear cause brake pneumatic valve, globe inside leaking leakage of pneumatic valve. Pneumatic ball valve by pneumatic sealing seat extrusion on the sphere for a long time, it is hemisphere pneumatic valve must wear fast, butterfly pneumatic valve seal is rubber for mediation, it a hemisphere pneumatic pneumatic valve, pneumatic ball valve, gate valve, metal hard seal performance. Hemisphere pneumatic valve use for a long time, the pneumatic valve seat also can produce trace wear and tear, it may continue to use by adjusting, pneumatic stem and packing in the process of opening and closing the valve stem rotation °, there were signs of leak, compression packing gland bolts again a few, packing place no leakage can be realized, and the other is still the small leak force with pneumatic valve, large leakage in the pneumatic valve.