Ball valve model establishment method instructions
Ball valve type code for Q. before Cryogenic ball valves plus "D", Before the heat-preserve ball valve plus "B".
| CODE NO. | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| drive model | worm wheel | pneumatic | motor-driven | |||||||
| connecting type | internal thread | external thread | F | weld | butt clamp | |||||
| type no. | structure type | |||||||||
| ball-valve Q | cut-through | angle type | right angle type | |||||||
| float type | L type ball float | T type ball float | fixed ball | |||||||
The handwheel, handle and spanner driving omit code.
| seal or liner material | code no. | seal or liner material | code no. |
| steel alloy | T | Permeability fluorine steel, | D |
| rubber | X | Hard alloy | Y |
| nylon plastic | N | rubber liner | J |
| F plastic | F | line with lead | Q |
| Tin and bearing alloy (ba type alloy) | B | enamal | C |
| steel-alloy | H | permeability boron steel | P |
The nominal pressure code in Arabic numerals, its value is nominal pressure value of 10 timesd for mpa as its unit. Used in power industry, when the highest temperature medium of the valve is more than 530 ° c, its value is the work unit for mpa pressure value of 10 times.
| body material | grey cast iron | nodular cast iron | carbon steel | steel alloy（Cr-Mo steel） | stainless steel | special alloy | |||||||||
| code no. | Z | Q | WCB | WC1 | LCB | LC3 | WC6 | WC9 | C5/C12 | common | CF8 | CF8M | CF3 | CF3M | M |
| C | C1 | C2 | C3 | I6 | I9 | I5 | P | R1 | R2 | R3 | R4 | ||||
ball-valve performance rule
| test item | test pressure（MPa） | test time（S） | test temp.（oC） | test medium | |
| shell test | 150Lb、1.6MPa | 2.4 | 120 (DN≤14") | ≤52oC(normal temp.) | Water (rust) kerosene or viscosity can contain less than water other suitable for medium |
| 300Lb、2.5、4.0MPa | 6.0 | ||||
| 600Lb、10.0MPa | 15.0 | ||||
| 900Lb、15.0MPa | 22.5 | ||||
| 1500Lb、25.0MPa | 37.5 | ||||
| 2500Lb、42.0MPa | 63.0 | ||||
| low-pressure seal test | 150Lb、1.6MPa | 0.6 | 120 | ≤52oC(NORMAL TEMP.) | Air or inert gases |
| 300Lb、2.5、4.0MPa | |||||
| 600Lb、10.0MPa | |||||
| 900Lb、15.0MPa | |||||
| 1500Lb、25.0MPa | |||||
| 2500Lb、42.0MPa | |||||
| high pressure seal test | 150Lb、1.6MPa | 1.76 | 120 | ≤52oC(normal temp.) | Water (contain anti-rust agent) kerosene or other medium viscosity less than water |
| 300Lb、2.5、4.0MPa | 4.4 | ||||
| 600Lb、10.0MPa | 11 | ||||
| 900Lb、15.0MPa | 16.5 | ||||
| 1500Lb、25.0MPa | 27.5 | ||||
| 2500Lb、42.0MPa | 46.2 | ||||
main parts material and performance
| body | rod | ball | seal surface | gasket(ring) | packing | working temp. | applicable medium |
| WCB | 1Cr13 | 1Cr13 | 1Cr13 Alloy material ontology | flexible graphite stainless steel plus flexible graphite F304 F316 | flexible graphite kniting graphite | -29~425oC | water,steam oil |
| WC6 | 15CrMo | 15CrMo | -29~595oC | ||||
| WC9 | 25Cr2MoV | 25Cr2MoV | |||||
| LCB | 304 | 304 | -46-345oC | ||||
| CF8 | 304 | 304 | -196~600oC | part acid,alkaline |
