The use and maintenance of discharge valve: ①discharge valve should be neatly stored in dry and ventilated warehouse, non-stacking or open storage, the valve diameter at both ends of the blind to be blocked. ② Before installation, the valve should be carefully inspected and the damage caused by internal transportation and storage of the valve should be eliminated. ③ In the installation should pay attention to the various departments of the screw force balance, lifting is flexible. ④ discharge valve should be installed in the absence of severe vibration and impact of the place, and the use of the valve without damage to the site. ⑤ when the material is obstructed, you can use the metal rod or hard tools to clear, pay attention to the use of metal rods or hard tools do not damage the disc and seal contact surface. ⑥ discharge valve should try to avoid the alternating use of acid-base medium (in addition to neutralization reaction medium), so as not to shorten the life. ⑦ According to the media performance and service life, should always check the discharge valve body top PTFE ring and orifice Department of tetrafluoroethylene sheet. If found to be damaged should be replaced and re-used.