Flange center line butterfly valve

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1.Technical Date:

Size: DN40-DN1200

Nominal Pressure: PN10/PN16

Operation Temperature: -10°C~150°C

Suitable Medium: Water,Sewage,Seawater,Gas,Food,Oils,etc.

2. Standard

Design Standard: GB/T 12238-2008

Structural Length: GB/T 12221-2005

Top Flange dimensions: ISO5211

Face to face dimensions: GB9112,DIN2501,BS4504,ISO2084,ANSI125

Type of connection: Flange Type

3. Feature:

Product structure: all rubber lined butterfly valve chamber using advanced heat vulcanization process, no mechanical reinforcement embedded in the body, improve the reliability of the seal, the media completely isolated from the casting, not pollution medium, and the rubber lining, coated on both sides to the flange seal face when installation without sealing gasket, loading and unloading easier and more convenient for maintenance and replacement.

The characteristics of the valve cavity, the valve cavity internal fasteners, not because of loose working medium scour, vibration occurred in the valve, fundamentally eliminate the loose due to mechanical connection or the possibility of failure causes accidents.

Valve design: butterfly valve design and manufacturing of GB12238-89 standard, adopt the advanced computer aided technology, reasonable design, big flow area, sizing smooth transition, small flow resistance, simple and compact structure, convenient operation, flexible seal, zero leakage.

Valve casting technology and materials: the body and the flange is made of whole casting process after the current international most advanced casting resin sand casting process, no blister, no pores, beautiful shape, improved the casting quality of the product.

Stem design and material: according to GB12228-2008 standard for design, fully meet the parameters of the minimum diameter valve shaft torque requirements, material is made of high quality carbon steel manufacturing, prolong the service life of the valve.

Stem bushing design and materials: the body bearing manufactured material with self-lubricating ability, valve shaft and valve plate connection, USES the pin connection or USES the close coordination of square tenon structure without pin,.

Butterfly valve installation: no medium to request, to achieve reliable positive and negative two-way sealing, can be installed in vertical or horizontal, can also according to customer requirements supporting anchor bolt and nut, more suitable for the overall installation and maintenance of butterfly valve.

Q: What's the difference between the three eccentric butterfly valve and the two eccentric butterfly valve?: The structure features that the center of the stem deviates from the center of the disc as well as the center of the body. The effect of the double eccentric valve can be opened immediately after the disc from the valve seat, substantially eliminating the unnecessary disc and valve seat over squeezing, scratching phenomenon, reduce the resistance from the open, reducing the wear and improve seat life. Three eccentric butterfly valve: to high temperature, must use hard seal, but the leakage is large; to zero leakage, must use soft sealing, but not high temperature. In order to overcome the double eccentric butterfly valve this contradiction, and the butterfly valve for third times eccentric. The so-called third eccentric, that is, the shape of the sealing pair is not a positive cone, but rather oblique cone.

Q: Butterfly valve D41W-1, 41, W, 1, respectively, what does that mean?: This butterfly valve in our factory called butterfly, 4 represents the connection of the flange connection flange is French, 41 in 1 on behalf of butterfly valve, W represents the body seal, is C that is actually the correct type of cast steel, should be D41W-1C. Suitable for ventilation, smoke, and these media.

Q: What is the difference between turbine butterfly valve and flanged butterfly valve?: The worm gear is the driving mode and corresponds to the handle; the flange is connected and corresponds to the clamp. Flange worm valve is generally, the handle of the butterfly valve

Q: Gate valve and butterfly valve which is installed when there is a direction?: Do not require frequent opening and closing, and keep gate fully open or fully closed. Not suitable for use as a regulator or throttling.

Q: Seat has said to the previous owner that the car needs a new air mass meter and dump valve.I am putting a new air mass meter on it.Does it have a dump valve.I know very little on this subject.: every turbo will have a dump valve(waste gate) to regulate the boost to the engine Dump valves are fitted to the engines of turbo charged cars and sit between the turbo outlet and the throttle body. When transitioning from a boosted state to a closed throttle state (as in between shifts), due to inertia, the turbo continues to pressurize air, but the closed throttle prevents the compressed air from entering the engine. In this case the pressure exceeds the preset spring pressure in the dump valve and the excess pressure is bled off to atmosphere. Even with a dump valve the compressed air acts as a brake on the turbo (slowing it down), because the pressure on the backside of the turbo is at a higher pressure than on the front side (and the air actually wants to flow through the turbo backwards). A blowoff valve is a more elegant solution to this problem by allowing the turbo to freewheel when the throttle is closed (equalizing the pressure on both sides of the turbo). Unlike a dump valve a blowoff valve can be used at multiple boost settings without reconfiguration. Blowoff valves are sometimes incorrectly called dump valves because they serve a similar function, but they are very different solutions to the same problem.

Q: How is the lug butterfly valve connected to the flange?: When installing, pay attention to the butterfly plate. The sealing ring between the flange face and the butterfly valve is tightened. After clamping, it can be tightened.

Q: I have put a new pressure valve and replaced both thermostat: so that should have fixed it I wonder if you needed to replace the stats

Q: 19 years ago i had a valve repair and now im due to have heart valve replacement. I heard that the metal valve make noise has anyone who has had the metal valve have this type f problem or any other problem with the metal valve it would be a great help if anyone could answer: mechanical valves last longer where as a tissue valve will require replacement down the track. mechanical valves require blood thinners to prevent clots - long term warfarin therapy is most common - stroke is a risk and pregnancy is contraindicated. the 'clicking' is often audible by stethoscope but not without one. it is likely you could feel it 'clicking' shut and its possible you would hear it - never thought to ask any of my patients that...

Q: Whenever sports cars are referred, people talk in terms of 'valves'. ex: v8, v12 etc. What does this all mean? Also they sometimes say that a v8 makes a great noise. why? How does the number of valves effects the performance? Many thanks.: the v is in reference to the motor its in a v formation v8 4 cyliders on each side v6 3 per side v12 6 pre side now the valves is how many are in each cylinder you usually have 3 or 4 valves per cylinder the more valves the more horsepower the more cylinders the bigger the engine