What do those Model Nos mean in butterfly valve? Like D343H,D71F,D41F,D341X…

Butterfly valve is one common used industrial valve, which is used in pipelines to connect, cut off and regulate the flow rate of the mediums, like water, gas,etc. When it comes to butterfly valves, some customer or manufacturers will use the model nos to represent some specific types of butterfly valves, like D71F, D341X,etc, but still, some people have no idea what those model nos mean in butterfly valve, today we are going to introduce how to read those model nos for butterfly valves, and also we will try to list some Model nos for different types of butterfly valves for your reference. 

The method to make the model nos for butterfly valve: 

Here, we will us D343H-10C as an example, ①D  ②3  ③4  ④3  ⑤H  ⑥10  ⑦C

Additional code for butterfly valve: BD means thermal insulation butterfly valve; SD means telescopic butterfly valve; TLD means desulfurization butterfly valve; DKS mean fast butterfly valve; FDBD means square louver butterfly valve; 

① the code in the first place represents what kind of valves this valve belongs to: D means butterfly valve; 

② the code in this place represents the operating device: manual lever( usually omitted), 3 represents worm gear box operated, 6 means pneumatic actuated, 7 represents hydraulic operated, 9 represents electric actuated; 

③ the code in this third place means the end connection types: 4 is for flange end connect, 6 is for welded connect, 7 is for wafer type end connect; 

④ the code here is for structural design: 1 is for concentric structure, 2 is for double eccentric structure, 3 is for triple eccentric structure, 4 is for variable eccentric structure, 5 is for single eccentric structure; 

⑤ the code here is for sealing material: H is for stainless steel, X is for rubber, F is for PTFE, FX is for compound rubber, M is for Monel Alloy, Y is for hard alloy, W is for body material itself; 

 ⑥ the code here is for pressure rate: 10=PN1.0Mpa, 16=PN1.6Mpa, 25=PN2.5Mpa, 40=PN4.0Mpa, PN is the pressure rate code in China, Mpa is the unit for pressure rate; Class 150LB=1.6Mpa, 300LB=2.5-4.0Mpa, class is for the pressure rate in American Standard(API/ANSI), LB is for the pound unit in American Standard; 

⑦ the code here is for valve body material: C is for cast steel, P is for stainless steel 304, R is for stainless steel 316, AL is for special alloy steel, Z is for cast iron, Q is for ductile iron, N is for Nylon; 

Here is the list for common used model nos for butterfly valves in GB China Standard: 

PTFE lined butterfly valve: 

D71F46-concentric wafer type manual lever handle PTFE lined butterfly valve; 

D671F46-concentric wafer type pneumatic actuated PTFE lined butterfly valve; 

D971F46–concentric wafer type electric actuated PTFE lined butterfly valve; 

Wafer type butterfly valve: 

D71F-concentric wafer manual lever handle PTFE lined butterfly valve; 

D71H-concentric wafer manual lever handle stainless steel metal seal butterfly valve; 

D71X-concentric wafer manual lever handle EPDM seated butterfly valve; 

D71Y-concentric wafer manual lever handle metal sealed butterfly valve; 

Flange type butterfly valve: 

D41F,D41H,D41X,D41W,D341F,D341H,D341X, D341W；

Square butterfly valve:

 FDBD; 

Butt welded butterfly valve: 

D363F,D363H,D363W,D963F,D963H,D963W；

Pneumatic actuated butterfly valve: 

D641F,D641H,D641W,D642F,D642H,D642W,D643F,D643H,D643W,D671F,D671H,D671W,D673F,D673H,D673W；

Electric actuated butterfly valve: 

D941F,D941H,D941W,D942F,D942H,D942W,D943F,D943H,D943W,D971F,D971H,D971W,D973F,D973H,D973W；

Triple eccentric butterfly valve: 

D343F,D373F,D343H,D373H,D343W,D373W;

Telescopic butterfly valve: 

SD41X,SD41H,SD341X,SD341H,SD641X,SD641H,SD941X,SD941H; 

Bidirectional sealing butterfly valve: 

DS343H,DS643H,DS943H；

Thermal insulation butterfly valve: 

BD343H,BD343W；

Hydraulic butterfly valve: 

HD7Q41X fully hydraulic controlling, HD7s41X heavy punch, YxKD743H fast, HBD7Z43H slow closing type, DX7K41H energy saving tank type. 

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