Payment & Shipping Terms:
|PN:||1.0、1.6、2.5、4.0、6.4(MPa) ANSI、150LB、300LB||Temperature Range:||Soft Seal -40℃~160℃, Hard Seal -40℃~425℃|
Three-dimensional eccentric butterfly valve
The butterfly valve is a kind of high-level control valve with right angle rotation. It can be used as a regulating valve or as an on-off valve. The long-life energy-saving butterfly valve developed by our company adopts the three-dimensional eccentric principle design, which makes the space movement track of the sealing surface idealized, and solves the shortcoming that the traditional eccentric butterfly valve is still in sliding contact friction when the opening and closing is 0° 10°. The sealing plate is separated at the instant of opening, and the contact is sealed when closed, thereby prolonging the service life and is suitable for controlling gas, solid particles and liquid. This product is widely used in the automatic control system of chemical, petroleum, chemical fiber, electric power, metallurgy, pharmaceutical, environmental protection, papermaking and other industrial sectors.
The valve stem is fixed by double bearings. The bearing is made of a special process of sintering copper on a stainless steel surface and then rolling PTFE on the copper surface. It has excellent wear resistance and self-lubricating function, which avoids the valve stem and bearing seizure phenomenon in the long-term use of the valve.
The valve body adopts a thin design, which is beautiful and light in appearance, small in size, light in weight and low in material consumption. It is more economical than other caliber valves.
The outer circle is made of coreless grinding, and the friction coefficient between the filler and the packing is small. The friction loss is minimized, and the valve opening and closing torque is greatly reduced.
The three-dimensional eccentric design provides a mechanical seal that allows the seal to be independent of its differential pressure. A good seal is guaranteed even at very low differential pressures.
Adopt multi-layer sealing structure design. Metal sealing seat and PTFE seat can also be selected according to working conditions.
|2||Valve stem||1||17-4PH, SS304, SS316, SS410|
|4||Seal ring||1||Stainless steel + graphite,PTFE|
|6||Hexagon socket bolt||On demand||SS304,SS316|
|11||Washer||1||Metal winding mat|
|12||Self-lubricating bearing||1||Composite material|
|13||Self-lubricating bearing||1||Composite material|
|14||Packing||On demand||PTFE,Flexible graphite|
Nominal diameter (DN): 50,65,80,100,125,150,200,300,350,400,450,500,600,700,800,900,1000,1200.
Nominal pressure (PN): 1.0,1.6,2.5,4.0,6.4(MPa) ANSI,150LB,300LB
Connection form: clip type, flange type, lug type.
Temperature range: soft seal -40℃~160℃, hard seal -40℃~425℃
Leakage: metal seal switch valve according to GB/T 13927 class D regulations; the control valve according to GB/T 4213 V class regulations; soft seal zero leakage.
Pressure test: the shell test pressure is 1.5 times the nominal pressure. The seal test is 1.1 times the nominal pressure. The test medium is water.
Flow characteristics: Approximate equal percentage characteristics.
The characteristic curve is as follows
Butterfly valve rated Cv value table
|DN||Valve reference torque(N.m )||Z series actuator||Fine actuator||Electric||Air pressure|
|(mm)||1.6 ( MPa)||ZSQ double acting actuator||ZDQ single acting actuator||DA||SR||(Mpa )|
Note: ZSQ and ZDQ actuators are developed by our company. For details, please refer to the Z series actuators. The above valve actuators are configured with a nominal valve pressure of 1.6MPa at room temperature. It is recommended to use the actuator air source pressure of 0.5MPa. If the valve nominal pressure is greater than 1.6MPa, the actuator will be further recommended.
Three-dimensional eccentric principle
1. Deviate from the center of the pipeline.
2. Deviate from the center of the sealing surface.
3. The eccentricity of the tapered cone on the sealing surface.
When the valve is opened, the disc is eccentric (1, eccentric, 2 quickly disengages from the valve seat), which reduces the wear at the seal, the friction torque is small, and the opening is flexible.
Eccentric cone. 3. The tangential line of the rotation surface of the sealing surface of the valve plate forms an angle with the sealing surface of the valve seat, and the sealing surface of the valve plate is gradually separated from the sealing surface of the valve seat and gradually pressed to reduce mechanical wear and abrasion. Sealing performance and service life are greatly improved.