Installation and maintenance 1. Before installation, check carefully whether the operating conditions of the pipeline comply with the applicable scope of this valve and clean the inner cavity to prevent the dirt from blocking or damaging the sealing components. 2. Rubber lining laminated rubber diaphragm surface Do not brush grease, to prevent swelling of rubber, affecting the valve life. 3. Do not lift the valve on the handwheel or valve stem during installation. 4. Do not use auxiliary levers when operating the valve manually to prevent damage to the drive components or seals due to excessive torsion. 5. Valve should be stored in a dry and ventilated room, non-stacking, both ends of the inventory valve must be sealed, and the opening and closing pieces should be slightly open state. Faults and elimination of the possible causes of the malfunction Elimination Handwheel operation inflexible 1. Stem twists 2. Thread damage 1 Replace stem 2. The valve can not be opened and closed automatically when the threads are trimmed and lubricated. Air pressure is too low 2. Spring preload is too large 3. Damaged rubber diaphragm 1. Increase the supply pressure 2. Reduce the spring preload 3. Replace the diaphragm valve body and valve cover leakage at the junction 1. Loose connection bolts 2. Body lining rupture 1. Tighten the connecting bolt 2. Replace the body
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