In the end, we should have a general understanding. In order to be able to make specific analysis, we will give examples to illustrate it.
Ball valve is generally divided into
floating ball valve and
fixed ball valve. The model of
floating ball valve can be written as Q41F ( Q is the initial word of Qiu Pinyin of ball valve. 4 is flange connection. 1 is the structural form is floating. F is the material of sealing surface is PTFE, which is commonly known as tetrafluoroethylene). And the model of
fixed ball valve can be written as Q47F (Q is the initial word of Qiu Pinyin of
ball valve. 4 is flange connection. 7 is the structural form is fixed. And F is seal. The material of the surface is PTFE, namely polytetrafluoroethylene, which is commonly known as tetrafluoroethylene). Both representations are manual. If there is a turbo drive on it, the models are Q341F and Q347F (so, Number 3 means turbine drive).
1. Generally, the diameter of
floating ball valve is from DN 15 to DN 250.
Fixed ball valve generally starts from DN50. To sum up, small caliber can be used as
floating ball valve, large diameter can be used as fixed ball valve.
2. From the appearance, the bottom of the
fixed ball valve has a lower stem bracket than that of the
floating ball valve.
3. There is no difference between
floating ball valve and
fixed ball valve. Materials are available on request.
Examples of
ball valve editing:
1. Low temperature
ball valve DQ41H-16Pindicates: D low temperature, Q ball valve, 4 flange connection, 1 floating through flow channel, H means stainless steel, 16 pressure is 16 kg, P valve body is 18-8 series stainless steel
2. Pneumatic ball valve Q645F-25C means: Q ball valve, 6 pneumatic drive, 4 flange type, 5T type three-way flow channel, F fluoroplastic, 25 pressure 25 kg, C cast steel.
The common ball valve models are:
V type ball valve: VQ40F, VQ640F, VQ940F, VQ641H, VQ941H, VQ70F, VQ670F, VQ970F, VQ71H, VQ671H, VQ971H;
Thermal insulation ball valve: BQ41F, BQ641F, BQ941F;
Stainless steel ball valve: Q41F, Q641F, Q941F, Q41H, Q641H, Q941H;
Fluorine lined ball valve: Q41F46, Q641F46, Q941F46;
Low temperature ball valve: DQ41F, DQ41H, DQ41Y;
Clip on ball valves: Q71F, Q671F, Q971F, Q71H, Q671H, Q971H;
High temperature ball valves: Q41M, Q641M, Q941M, Q41PPL, Q641PPL, Q941PPL;
Fixed ball valves: Q347F, Q647F, Q947F, Q347H, Q647H, Q947H, Q347W, Q647W, Q947W;
Turbine ball valve: Q341F, Q341H, Q341W, Q341Y;
Welded ball valves: Q61F, Q361F, Q61H, Q661F, Q661H, Q961F, Q961H;
Eccentric hemisphere valve: Q340F, Q640F, Q940F, Q340H, Q640H, Q940H, Q340Y, Q640Y, Q940Y;
Top mounted ball valves: SQ340F, SQ940F, SQ340H, SQ940H, SQ347H, SQ647H, SQ947H, DYQ340F, DYQ640F, DYQ940F;
Three way ball valve: Q44F, Q45F, Q44H, Q45H, Q644F, Q645F, Q644H, Q645H, Q944F, Q945F, Q944H, Q945H;
Four way ball valve: VQ40F, VQ640F, VQ940F, VQ641H, VQ941H, VQ70F, VQ670F, VQ970F, VQ71H, VQ671H, VQ971H.
