Evolving material has a significant impact on the development of ball valve. There are a wide range of materials for you choose, so valves become more reliable and the range of application becomes wider. Currently, a variety of stainless steels and corrosion resistant alloys, as well as improved polymers, plastics and ceramics, have been widely chosen by valve manufacturer.
As for ball materials, it can be broadly divided into two categories: hard material and soft materials. Sealing seat, sealing and lining of
ball valves are mostly made of soft materials. In addition to pressure-proof and anti-corrosion, it also requires a certain range of temperature.
It is nothing more than aluminum, copper, iron, steel, and alloys for metal materials.They often require material test reports. For low temperature materials, they also require a report of low temperature and impact test. They also have specific requirements for the material used in sulfide environment.
For the development of valve, the most significant variation would be the change of material. The stainless steel that commonly used for the valve body and the inner member will likely be replaced by less expensive and better performance of material. Not only metals, but also ceramics, metal ceramics, composites are substitute materials developed from positive experiment in various countries in the world. Ball valves and control valves with greater toughness and corrosion resistance will appear. Its excellent performance will have a major impact on the development of ball valves. For PTFE, it is difficult to find others that can compare with it because it develops too fast. However, it is still can be done to make it more flexible, more abrasion resistance and be for wider temperature range.
The substitute of asbestos will also appear. All of these abroad trends will also motivate the valve industry to advance bravely. The commonly used materials and standards of abroad ball valves are as follows:
Commonly Used Material of Ball Valves:
Valve Body Materials:
Cast Iron ASTM A126
Ductile Cast Iron ASTM A395
Carbon steel
ASTM A216 WCB (Casting)
ASTM A105 (Forging)
Carbon Steel (low temperature)
ASTM A352 LCB (Casting)
ASTM A350 LF2 (Forging)
SS304
ASTM A351 CF8C (Casting)
ASTM A182 F304C (Forging)
SS316
ASTM Gr. C#8M (Casting)
ASTM Gr.F316 (Forging)
Aluminum ASTM B26 (Casting）
ASTM B247C (Forging)
Copper ASTM B61, 62 (Casting）
Inconel(inconel) ASTM B166 (Forging）
(MONEL) ASTM A296 M35 (Casting）
(HASTELLOY) B ASTM A296 (Casting）
(HASTELLOY) C ASTM A494 (Casting）
Titanium ASTM B367 (Casting）
B381 (Forging）
Nickel ASTM A296 (Casting）
20 Alloys
ASTM A296 (Casting）
Bolt Materials:
Casting Iron ASTM A307 GrB
Ductile Cast Iron ASTM A193 Gr B7
Carbon Steel WCB ASTM A193 Gr B7
Carbon Steel LCB ASTM A193 Gr B7
SS304 (CF8)
ASTM A320 Gr B8
ASTM A193 Gr B8
SS316 (CF8M)
ASTM A320 Gr B8
ASTM A193 Gr B8M
Seal Material:
PTFE
PEEK
Reinforced Nylon
Kel-F
UHMWPE 93
Polyimide
POM
Metal:
46-345-254 -816
254 -816-196-204
196-288-196-649
196-482
196-371
196-538 312
196-260
