DIN German standard PN16/PN40 Oil Steam Cast steel flange bellow globe valve
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- Supplier: Henan Weisidun Import And Export Trade Co. Ltd.
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Product Overview
Description
Low energy consumption and good stability |
Good sealing and high performance |
Wide range of uses in many fields |
Years of industry experience |
Quality assurance after-sale tracking |
Support customization |
Fast shipping |
Strict quality inspection |
Instructions for storage, maintenance, installation and use
1. Valves should be stored in a dry and ventilated room, and both ends of the valve should be blocked.
2.Valves stored for a long time should be checked regularly to remove dirt.
Attention should be paid to the cleaning of the sealing surface to prevent damage.
3. Before installation, should carefully check whether the valve mark conforms to the requirements of use.
4. Check the inner cavity and sealing surface of the valve before installation. If there is any dirt, it should be wiped with a cleaning cloth.
5. Before installation, check whether the packing is pressed tightly, and at the same time shouldn’t hinder the rotation of the valve stem.
6.The valve should be in the fully open position when the system or pipeline is pressure tested.
7. The handwheel should be used when opening or closing the manual valve, and auxiliary levers or other tools should not be used.
8. Valves should be checked regularly to check whether the sealing surface, valve stem, gaskets and packings are worn or not. If there are damages, it should be repaired or replaced in time.
2.Valves stored for a long time should be checked regularly to remove dirt.
Attention should be paid to the cleaning of the sealing surface to prevent damage.
3. Before installation, should carefully check whether the valve mark conforms to the requirements of use.
4. Check the inner cavity and sealing surface of the valve before installation. If there is any dirt, it should be wiped with a cleaning cloth.
5. Before installation, check whether the packing is pressed tightly, and at the same time shouldn’t hinder the rotation of the valve stem.
6.The valve should be in the fully open position when the system or pipeline is pressure tested.
7. The handwheel should be used when opening or closing the manual valve, and auxiliary levers or other tools should not be used.
8. Valves should be checked regularly to check whether the sealing surface, valve stem, gaskets and packings are worn or not. If there are damages, it should be repaired or replaced in time.
Possible failures, causes and elimination methods | ||||
Possible failures | Causes of failure | Solution | ||
Packing leakage | 1.The packing gland is not pressed tightly 2.The filler has been used for a long time or stored inappropriate and invalid | 1. Tighten the nut evenly to compress the packing 2. Replace the packing | ||
Leakage between sealing surfaces | 1. There is dirt and debris attached to the sealing surface 2. Damaged sealing surface | 1. Clean up the dirt 2. Rework, trim or replace | ||
Leakage at the connection between the valve body and the bonnet | 1. Uneven tightening of connecting bolts 2. The flange sealing surface is damaged 3. Cracked or failed gasket | 1. Tighten evenly 2. Refinish 3. Replace with new gasket | ||
Handwheel rotation is not flexible or the gate cannot be opened and closed | 1. The packing is pressed too tightly 2. Packing pressure plate, the pressure sleeve device is skewed 3. The stem nut is damaged 4. The thread of the valve stem nut is severely ground damaged or broken 5. Stem bending | 1. Properly loosen the nut on the packing pressure plate 2. Correct the packing platen 3. Disassemble and trim threads and remove dirt and debris 4. Replace the stem nut 5. Correct the valve stem | ||
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