D341X-16Q/D341X-16P/D341X-16C/D341F-16Q/D341F-16P/D341F-16C in butterfly valve mean?-Belo Valve

D341X-16Q: EPDM lined ductile iron worm gear operated flange butterfly valve

D is for butterfly valve, 3 is for worm gear operated, 4 is for flange end, 1 is for concentric structure, X is for EPDM lined, 16 is for nominal pressure PN16, Q is for body material ductile iron. 

D341X-16P: EPDM lined stainless steel worm gear operated flange butterfly valve

D is for butterfly valve, 3 is for worm gear operated, 4 is for flange end, 1 is for concentric structure, X is for EPDM lined, 16 is for nominal pressure PN16, P is for body material stainless steel(304/316). 

D341X-16C: EPDM lined cast steel worm gear operated flange butterfly valve

D is for butterfly valve, 3 is for worm gear operated, 4 is for flange end, 1 is for concentric structure, X is for EPDM lined, 16 is for nominal pressure PN16, C is for body materialcast steel. 

D341F-16Q: PTFE lined ductile iron worm gear operated flange butterfly valve

D is for butterfly valve, 3 is for worm gear operated, 4 is for flange end, 1 is for concentric structure, F is for PTFE lined, 16 is for nominal pressure PN16, Q is for body material ductile iron. 

D341F-16P: PTFE lined stainless steel worm gear operated flange butterfly valve

D is for butterfly valve, 3 is for worm gear operated, 4 is for flange end, 1 is for concentric structure, F is for PTFE lined, 16 is for nominal pressure PN16, P is for body material stainless steel(304/316). 

D341F-16C: PTFE lined cast steel worm gear operated flange butterfly valve

D is for butterfly valve, 3 is for worm gear operated, 4 is for flange end, 1 is for concentric structure, F is for PTFE lined, 16 is for nominal pressure PN16, P is for body material cast steel. 

Working principle of EPDM/PTFE lined soft sealing flange butterfly valve: 

The rotation center of the butterfly plate(the center of the valve stem) is located on the center line of the valve body and the sealing surface section of the butterfly plate, and the butterfly plate can be opened and closed by rotating 90°. the valve seat is made of synthetic rubber. When the butterfly plate is closed, the outer circular sealing surface of the valve disc  squeezes the synthetic rubber valve seat, so that the valve seat is elastically deformed to form an elastic force as the sealing pressure to ensure the sealing performance of the butterfly valve. 

Components material options in concentric soft sealing flange 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; 

Advantages of concentric soft sealing flange butterfly valve: 

Soft sealing flange butterfly valve is small in size and light in weight, and can be used as a device for cutting off and regulating flow in various medium pipelines. By selecting different materials for valve plate and sealing seat, and connecting the valve plate and the stem without pins, soft sealing flange butterfly valve can be used in more severe working conditions, such as desulfurization, vacuum, seawater desalination system, etc. The lug wafer type butterfly valve can realize the online repair of the downstream pipeline and equipment of the valve, and also that flange butterfly valve can also realize the online repair of the downstream pipeline and equipment of the valve, that soft sealing flange butterfly valve can be installed at the pipe end and used as an exhaust valve. 

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

2. concentric soft sealing flange butterfly valve has simple and compact structure, it can rotate 90° to realize quick opening and closing; 

3. the soft sealing flange butterfly valve has small operating torque and is labor-saving and lightweight; 

4. concentric soft sealing flange butterfly valve can achieve complete sealing, and zero leakage in gas testing; 

5. with different material used for different components, soft sealing flange butterfly valve can be used for various mediums; 

6. the flow characteristics of soft sealing flange butterfly valve tend to be straight, and its adjustment performance is good; 

7. the number of opening and closing tests of soft sealing flange butterfly valve can be up to tens of thousands, and its service life is long; 

The structure principle of the butterfly valve is especially suitable for making large-diameter valves. The commonly used butterfly valves are wafer type butterfly valve and flange type butterfly valve. The wafer type butterfly valve is used to connect between the two pipeline flanges with stud bolts. The flange type butterfly valve has one flange at each end of the butterfly valve, and the flanges at both ends of the butterfly valve are connected to the pipeline flange with bolts. 

Applications of concentric soft sealing flange butterfly valve: 

This concentric soft sealing flange butterfly valve is suitable for petroleum, chemical, food, medicine, paper making, hydro-power, ships, water supply and drainage, smelting, energy and other pipelines. It is used as regulating and shut off device on a variety of corrosive and non corrosive gases, liquids, semi-fluids and solid power pipes and containers. 

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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