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Introduction of eight kinds of valves suitable for the chemical industry

Introduction of eight kinds of valves suitable for the chemical industry

  • Categories:Industry news
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  • Time of issue:2020-03-15
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(Summary description)The gate valve is suitable for most switching operations, vibration-free hydrocarbons, and utilities in all temperature ranges. During operation with vibration, the gate valves may open or close from their normal positions. Unless the stem packing is carefully adjusted, the torque characteristics of gate valves are better than ball valves and plug valves, but they do not have the convenient operating characteristics of 90-degree rotation.

Introduction of eight kinds of valves suitable for the chemical industry

(Summary description)The gate valve is suitable for most switching operations, vibration-free hydrocarbons, and utilities in all temperature ranges. During operation with vibration, the gate valves may open or close from their normal positions. Unless the stem packing is carefully adjusted, the torque characteristics of gate valves are better than ball valves and plug valves, but they do not have the convenient operating characteristics of 90-degree rotation.

  • Categories:Industry news
  • Author:
  • Origin:
  • Time of issue:2020-03-15
  • Views:0
Information

The gate valve is suitable for most switching operations, vibration-free hydrocarbons, and utilities in all temperature ranges. During operation with vibration, the gate valves may open or close from their normal positions. Unless the stem packing is carefully adjusted, the torque characteristics of gate valves are better than ball valves and plug valves, but they do not have the convenient operating characteristics of 90-degree rotation.

1. Manually operated gate valves with a size of dn50 or larger should be equipped with elastic gates or expansion gates. Wedge gate valves usually do not have valve chamber overpressure protection.

2. The open stem gate valve without protection is not recommended. Because the marine environment will corrode the exposed stem and threads, the valve is difficult to operate and the stem packing is easily damaged.

3. The gate valve with reverse acting plate is suitable for automatic shut-off system operation. For these valves, a simple push-pull operator can be used, thus avoiding the complicated operating rod cam required by ball valves and plug valves. All movable parts with power operators on the gate valve can be closed, eliminating the pollution caused by paint and corrosion products.

4. Gate valves cannot be used in throttling operations. Especially for fluids containing sand, throttling can damage the sealing surface.

5. The operating temperature of the soft-seal gate valve is limited by the sealing material.

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