进口真空截止阀原理特点及品牌（图）

进口真空截止阀主体采用铸锻结构，具有平行双密封副半强制双向密封，密封到位运动和楔形块楔紧运动分步作用实现零泄漏。适用于工作温度≤425℃和≤550℃，工作介质为水、蒸汽或空气的管路上，作为启闭装置；尤其适用于火电厂汽机冷凝和真空负压系统，起真空隔离密封作用。

Bellows sealed globe valves provide reliableservices intrans mission of hazardous medium, including flammable, explosive,strong permeable fluids and radioactive fluid. They are recommended in service applications,including chlorine, oxygen, hydrogen, gas and heat-transfer oil for industriesof polyester, filature, PTA, oil, chemical, power and food processing, etc.Zero emissions are guaranteed in these applications. The product is developedby Thomas after years of study and engineering efforts. The product, withmulti-ply bellows, innovative design, excellent performance,is environmentalfriendly and has well tackled fugitive emission problems that frequently foundin similar products.

Design Specification

Design& Manufacture： API 602ASME B16.34 MSS SP-117

Face-to Face Dimension： ASME B16.10

End Connection： ASME B16.25

Pressure-Temperature Ratings： ASMEB16.34H420592

Test& Inspection： API 598

Helium Leak Test：API 602 MSS SP-117

Each valve, from casting to assembly, shallbe tested100% in conformance with the requirements of the related standards.Please follow instruction for mounting.