What does D71X-16Q/D71X-16P/D71X-16C/D71F-16Q/D71F-16P/D71F-16C in butterfly valve mean?-Belo Valve

D71X-16Q: EPDM lined ductile iron manual lever handle operated wafer butterfly valve

D is for butterfly valve, the code for manual lever operated is omitted, 7 is for wafer end connection, 1 is for concentric structure, X is for EPDM lined, 16 is for nominal pressure PN16, Q is for body material ductile iron. 

D71X-16P: EPDM lined stainless steel manual lever handle operated wafer butterfly valve

D is for butterfly valve, the code for manual lever operated is omitted, 7 is for wafer end connection, 1 is for concentric structure, X is for EPDM lined, 16 is for nominal pressure PN16, P is for body material stainless steel 304. 

D71X-16C: EPDM lined cast steel manual lever handle operated wafer butterfly valve

D is for butterfly valve, the code for manual lever operated is omitted, 7 is for wafer end connection, 1 is for concentric structure, X is for EPDM lined, 16 is for nominal pressure PN16, C is for body material cast steel. 

D71F-16Q: PTFE lined ductile iron manual lever handle operated wafer butterfly valve

D is for butterfly valve, the code for manual lever operated is omitted, 7 is for wafer end connection, 1 is for concentric structure, F is for PTFE lined, 16 is for nominal pressure PN16, Q is for body material ductile iron. 

D71F-16P: PTFE lined stainless steel manual lever operated operated wafer butterfly valve

D is for butterfly valve, the code for manual lever operated is omitted, 7 is for wafer end connection, 1 is for concentric structure, F is for PTFE lined, 16 is for nominal pressure PN16, P is for body material stainless steel 304. 

D71F-16C: PTFE lined cast steel manual lever operated operated wafer butterfly valve

D is for butterfly valve, the code for manual lever operated is omitted, 7 is for wafer end connection, 1 is for concentric structure, F is for PTFE lined, 16 is for nominal pressure PN16, C is for body material cast steel. 

How D71X/F manual concentric wafer EPDM/PTFE lined butterfly valve works? 

The disc of the concentric wafer butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical passage of the wafer butterfly valve body, the disc rotates around the axis, and its rotation angle is between 0° and 90°, when the disc rotates to 90°, the wafer butterfly valve is in fully opened state. D71X/F concentric wafer soft sealing butterfly valves should generally be installed horizontally in the pipeline. At present, concentric wafer type soft sealing butterfly valve, as a device used to realize on-off and flow control of pipeline system, has been widely used in many fields such as petroleum, chemical industry, metallurgy, hydro power, and so on. 

Components material options in concentric soft sealing wafer butterfly valve: 

Valve body: cast iron, ductile cast iron, carbon steel, stainless steel; 

Valve disc: cast iron, ductile cast iron, carbon steel, stainless steel, carbon steel covered with rubber or fluoro plastic; 

Valve stem: carbon steel plated with Nickel and phosphorus, stainless steel; 

Valve seat sealing ring: natural rubber(NR), chloroprene rubber (CR), nitrile rubber(NBR),EPDM, PTFE. 

Operating device: Lever handle, worm gear box, electric actuator, pneumatic actuator, hydraulic actuator;

Advantages of D71X concentric wafer soft sealing butterfly valve: 

1. concentric wafer soft sealing butterfly valve has small size, light weight, and is easy to disassemble and maintain, and can be installed in any position; 

2. The concentric wafer soft sealing butterfly valve has simple and compact structure, and its operating torque is small, and it can rotate 90° to realize quick opening and closing; 

3. The flow characteristics of concentric wafer soft sealing butterfly valve tend to be straight, and its adjustment performance is great; 

Applications of concentric wafer soft sealing butterfly valve: 

Wafer butterfly valve is also called flap valve, is one kind of simple regulating valve, which can be used low pressure pipelines to open, close and regulate the mediums. The closing component of the wafer butterfly valve is a round disc, which rotates around the valve stem to realize the opening and closing of the butterfly valve. 

Concentric wafer type soft sealing butterfly valve is suitable for pipelines conveying various corrosive and non corrosive fluid medium in engineering systems such as producer, coal gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting and power generation,environmental protection, building water supply and drainage,etc. It is used to regulate and cut off the flow of the mediums; 

Belo Valve is a more than 15 years professional manufacturer for industrial valves, like butterfly valves( center line wafer butterfly valve, manual butterfly valve, lever driving butterfly valve, butterfly valve with worm gear box, lug type butterfly valve, soft seal butterfly valves, hard seal butterfly valves, flange butterfly valves, ductile cast iron butterfly valves, stainless steel butterfly valve), gate valves(including DINF4 gate valves, DINF5 gate valves, DIN3352 gate valves, rising stem gate valves, non rising stem gate valves, soft seal gate valves, hard seal gate valves, hydraulic gate valves, sluice valves), globe valves( DIN globe valves, bellows globe valves, electric globe valve), ball valves( welded ball valves, soft seal ball valves, stainless steel ball valves, WCB ball valves, ductile cast iron ball valves, API ball valves), check valves( wafer type check valves, swing check valves, rubber disc check valves, ball type check valve, foot valve/bottom valve), fire protection valves( grooved butterfly valves, grooved gate valves, grooved strainers, grooved check valves), hydraulic control valves,etc.

As a professional valves manufacturer, we are not only supplying various valves products, but also offer professional advices about what kind of industrial valves should be selected. 

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