Pneumatic three-piece ball valve advantages

Pneumatic three-piece ball valve and plug valve are of the same type of valve, and only its closure is a ball, the ball around the centerline of the valve body to rotate to achieve the opening and closing of a valve. Pneumatic three-piece ball valve in the pipeline is mainly used to cut off fast, distribution and change the flow direction of the media. Pneumatic three-piece ball valve is widely used in recent years, a new type of valve, which has the following advantages: 1. Pneumatic three-piece ball valve fluid resistance is small, the coefficient of resistance and the same length of pipe equal. 2. Simple structure, small size, light weight. 3. Tight and reliable, the current ball valve sealing surface material widely used plastic, good sealing, vacuum system has also been widely used. 4. Pneumatic three-piece ball valve easy to operate, open and close quickly, from full to complete turn as long as 90 °, easy to remote control. 5. Easy maintenance, pneumatic valve structure is simple, the seals are generally active, demolition and replacement are more convenient. 6. In the fully open or fully closed, the ball and valve seat sealing surface and media isolation, the media will not cause erosion of the valve sealing surface. 7. Pneumatic three-piece ball valve wide range of applications, diameter from a few millimeters, up to a few meters, from high vacuum to high pressure can be applied.

STEP Inverter

AS380 series elevator integrated drive controller is the new generation of state-of-the-art elevator-specific control and drive device. With full consideration of the safety & reliability of elevator;inherent characteristic of elevator operation and specific feature of potential energy load for elevator, AS380 series elevator integrated drive controller adopted advanced technology of frequency control of motor speed and intelligent elevator control as well as the integration of control & drive of elevator to make the further improvement of the product performance, easy-to-use property and cost efficiency.


Main features

a) Prefect integration of control and drive of elevator. The whole device features compact structure and small size, fewer connections, which is characterized as high reliability and easy-to-use property and cost-efficiency.

b) Double 32-bit embedded microprocessor jointly finish the elevator operation and motor drive control

c) Redundant safety design , double safety protection for control processor and drive processor to achieve the maximum safety guarantee for elevator travel

d) The design requirements of anti-interference capacity go beyond the highest standard in the industrial design requirement. e) All CAN bus communication make the whole system connected easily, data transmitted strongly, and more reliable.

f) The adoption of the advanced direct landing technology make elevator running more efficiently

g) The advanced multifunctional elevator operation mode can fully meet various needs of customers`

h) Advanced group control feature. Not only compatible with the traditional group control mode of up to 8 units, but also support the new group control of destination floor distribution.

i) The adoption of advanced vector control technology can make the motor speed adjusted well for the realization of the best elevator comfort.

j) Adapt to both synchronous motor and asynchronous motor.

k) Newly-developed none-load sensor-activated compensation technology provides excellent starting comfort to elevator even if no counterweight is installed.

l) To adopt incremental ABZ encoder to realize the synchronized control of motors. To adopt the none-load sensor-activated compensation technology to achieve the excellent start-up comfort.

m) New PWM dead band compensation technology can effectively reduce the motor noise and loss of machine.

n) Dynamic PWM carrier modulation technology can effectively reduce the motor noise.

o) Auto-tuning phase of synchronous motor without encoder

p) Asynchronous motor is not required for motor parameter acquisition process once the motor parameter is set correctly. The convenient static motor parameter acquisition process is available If is impossible to acquire the exact motor parameter on site. So there is no need to hoist the car and etc in this way.

q) The hardware is the 6th generation of module with the junction temperature resistance up to 175℃. Low loss for switch and connection to ensure the long use life.

STEP inverter,elevator inverter,elevator control system,STEP control system

Suzhou Keffran Parts Co.,ltd , https://www.keffran-elevatorsmart.com