4. Installation
1) Remove the protective covers on both sides of the flange end, and flush and clean the valve when the valve is fully opened.
2) Before installation, the whole machine shall be tested according to the specified signal (electricity or gas) (to prevent vibration caused by transportation from affecting the service performance), and can be installed online only after it is qualified (wiring shall be in accordance with the circuit diagram of electric actuator).
3) Before preparing to connect with the pipe, the residual impurities in the pipe must be flushed and removed (these substances may damage the valve seat and ball).
4) During installation, please do not use the actuator part of the valve as the lifting point to avoid damage to the actuator and accessories
5) This type of valve shall be installed in the horizontal or vertical direction of the pipeline.
6) The pipeline near the installation point shall not sag or bear external force, and the pipeline support or support can be used to eliminate the deviation of the pipeline.
7) After connecting with the pipeline, please cross lock the flange connecting bolts with the specified torque.

Bottleneck of pneumatic butterfly valve
As usual, we are facing many problems. However, in many industries, pneumatic butterfly valves are indispensable.
Pneumatic butterfly valve enterprises still bear a heavy burden, the charges of enterprises are still too high, and illegal charges still exist. For example, some central authorities use arbitrary charges to ease financial difficulties, some departments use their rights to collect fees to seek departmental interests, and some grass-roots law enforcement personnel use illegal charges to seek personal interests.
Since last year, in order to stabilize the achievements of the response to the financial crisis, China has implemented a prudent monetary policy, improved the bank reserve ratio for 12 consecutive times, and reduced the scope of credit, which has further increased the difficulty of financing for small and medium-sized pneumatic butterfly valve enterprises, especially small and micro pneumatic butterfly valve enterprises. A large number of small and medium-sized pneumatic butterfly valve enterprises are in urgent need of private lending, The borrowing rate has reached 50% - 100%, and the financing cost remains high. In 2010, China's current financial system was difficult to deal with the "bottleneck" problem of limited financing channels, small scope and high cost for small pneumatic butterfly valve enterprises.