氨用截止阀专为氨气、燃气的管路或装置设计，结构上注意了防火要求，填料采用聚四氟乙烯，密封可靠、绝对物外漏。密封副材料采用聚四氟乙烯，为软密封，密封可靠。适用于氨气,液化石油气氟气管路系统，作为启闭装置，也适用于其他温度≤150℃的管路。氨用截止阀具有密封性能稳定、使用安全可靠、耐腐蚀性强、无介质内、外漏以及操作轻便等特点，成功解决了化工管道用普通阀门耐腐蚀性能差、壳体易穿孔以及密封性能差、易泄露的难题，特别适用于化工行业氨气,燃气管道的传送，并满足长期可靠使用的要求。其密封性、可维修性、安全性等。
Design Standard
Designand manufacture：GB/T 26478《global valve and check valve》 API 602
Face-to-facedimensions：GB/T 12221
Endconnection：GB/T 12224 (buttwelded
ASME B16.11(socket welded)
GB/T 9113 HG/T 20592(flange)
Pressure-temperature：GB/T 9131
Test-inspection：GB/T 9092
Heliumleak test：API 602
Application
The valves provideexcellent services in industries, where ammonia is used, produced ordischarged. These industries include chemical, steel, power, waste water,fertiliser, textile, fiber, leather, plastic, dye and pharmaceutical, etc.
Feature
Zero Leakage isensured.
a、Primary seal——bellows assembly
It’sa fully enclosure type structure to avoid direct contact with the fluid beingtransmitted. So it could offer maximum service life, maintenance free, andreduce the operating cost.
b、Secondary seal——nonmetallic packing material
The gland packing, stuffed withflexible graphite material, served as an extra protection to preven fromleaking, particularly at high temperature
applications.
c、Position limit
Positionlimit on upper stem provides effective protection from flexible bellowsvariability, to ensure safe use of the valve.
Stem, bellows protection device
a、Anti-rotation block
Preventlateral movement of bellows, to ensure maximum service life of bellows
b、Packing sleeve
Forpacking compression, in order to achieve a better sealing performance
State-of –the- art engineering
a、Surfacing, grinding of the valve, seat
Discmaterial is corrosion-resistant stainless steel or alloy steel. Disc is welded tothe lower end of the stem by plasma transferred arc (PTA) process and is finelapped, ensuring perfect sealing of the contact surfaces between disc and valvebody.
b、Hinged connection
Hingedconnection between disc and stem has increased sealing of the connectingfurfaces and thus zero emissions are guaranteed.
c、Uniquechannel design
The computersimulated valve chamber design offers very low flow resistance. The flow ratecould be increased by 10-15% as compared with valves of similar size.
