Ammonia Globe Valve with Bellows

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Bellows Sealed Globe Valve

For Ammonia Application

Series J

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.

 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.

 

 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.

 

 Position limit

       Positionlimit on upper stem provides effective protection from flexible bellowsvariability, to ensure safe use of the valve.

 Anti-rotation block

Preventlateral movement of bellows, to ensure maximum service life of bellows

 

 Packing sleeve

Forpacking compression, in order to achieve a better sealing performance

 

 State-of –the- art engineering

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.

 

 Hinged connection

Hingedconnection between disc and stem has increased sealing of the connectingfurfaces and thus zero emissions are guaranteed.

 

 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.