ammonia valve

design standards

Design and manufacturing: GB/T 26478 "Globe valves and lift check valves for ammonia" API 602

Structure length: GB/T 12221

Connecting size: GB/T 12224(butt welding) ASME B16.11(socket welding) GB/T 9113HG/T 20592(flange)

Pressure-temperature: GB/T9131

Test-inspection: GB/T9092

Helium mass spectrometry leak detection: API 602

structural characteristics

zero-leak seal

● Main seal--bellows assembly

It adopts built-in design, avoids flushing and maintenance, reduces operating costs and has a long service life.

● Auxiliary sealing--non-metallic packing

The use of woven fillers with corrosion inhibitors increases reliability, safety and high temperature resistance, providing a maintenance-free condition.

● Inner limit device

Increasing the upper limit of the valve stem protects the safety of the valve, effectively protects the elastic variable of the bellows, and greatly improves the service life.

Valve stem and bellows protection device

● Anti-rotation block

Prevent lateral torsion of bellows and ensure maximum service life of bellows

● Packing gland

Used to compress packing to make the sealing performance better, increase the service life of packing, and avoid maintenance;

Excellent processing and optimized design

● Surfaced and ground valve discs and seats

The valve disc and valve seat are welded with cemented carbide. After grinding, they are corrosion resistant, improve service life and ensure the reliability of the internal seal;

hingedly connected

The valve disc and the lower valve stem are hinged, mainly for the sealing consistency at the contact point of the sealing surface, making the sealing performance more reliable and ensuring no leakage

Flow channel optimization

The best results obtained by computer simulation and demonstration are used for production. After optimization, the flow channel capacity is increased by 10 - 50% compared with the valve of the same specification, and the flow resistance coefficient is low.

Main Parts & Materials

Body--A105, WCB, 304, 316, 316L, CF8, CF8 M, CF3 M

Valve cover--A105, WCB, 304, 316, 316L, CF8, CF8M, CF3M

Bellows--304, 316, 316L, 316Ti

Upper/lower stem--304, 316, 316L, 316Ti

Disc--304, 316, 316L(build-up Stellite, fluorine lined material)

application scenarios

Suitable for gas, ammonia, and gas storage tank station pipelines; It is widely used in petrochemical, steel, textiles, electric power and other ammonia production or enterprises that use ammonia products or discharge ammonia nitrogen wastewater. It can also be used in the treatment of municipal sewage and landfill leachate, chemical fertilizer manufacturing (ammonia is used to make ammonium sulfate, ammonium nitrate, ammonium bicarbonate, urea and other chemical fertilizers), synthetic fiber, leather, medicine, plastics, dyes and other manufacturing industries, and ammonia is also often exposed to.