TY - JOUR AU - Kryzhanovskii, O. AB - is the noise level. These advantages make this valve design very promising for flammable, explosive, toxic, and radioactive fluids. Along with the tests on this bellows valve, investigations were conducted on the use of new materials, ball plug and seat facings, and effective coatings. The most promising are ceramic and composition materials and hard stellite facings, which make possible a significant increase in the reliability and competitiveness of this type of fitting on the world market. O. G. Kryzhanovskii UDC 621.646.986"71" Today, compound flap valves, which combine the functions of flap valves and check valves, are being applied ever more widely and stand out in their economic advantages. Thus, al- though the compound flap valve is more complex than the flap or check valves themselves, its cost does not exceed their overall cost and is smaller and lighter because it is built into a single body. Thus it is possible to reduce the size of the mounting for the com- pound valve. Compound valves should also include the so-called isolation check valves, that is, a design which unites a valve and a lift check valve. Two types of compound rotating valves are produced - with a cylinder drive or TI - Prospects of developing compound flap valves JO - Chemical and Petroleum Engineering DO - 10.1007/BF01148607 DA - 2005-01-28 UR - https://www.deepdyve.com/lp/springer-journals/prospects-of-developing-compound-flap-valves-cGv6QpBiHQ SP - 225 EP - 228 VL - 28 IS - 4 DP - DeepDyve ER -