Views: 0 Author: J-VALVES Publish Time: 2025-06-11 Origin: Site
I. BASIC STRUCTURE AND WORKING PRINCIPLE
II. PERFORMANCE COMPARISON
Performance Indicators | Rising Stem Gate Valves | Non-rising Stem Gate Valves |
Sealing Performance | It has relatively good sealing performance. The threaded engagement between the stem and the stem nut is tight, and it is not easy to leak. | It has relatively good sealing performance, but the matching precision between the gate and the stem nut is required to be relatively high, otherwise it may affect the sealing effect. |
Operational Convenience | The lifting position of the stem can be observed intuitively to judge the opening degree of the valve. | It is necessary to use other indicating devices or judge the opening degree of the valve by the number of rotation turns. |
Installation Space Requirement | A certain vertical space is needed to accommodate the lifting part of the stem. | No additional vertical space is required, and it is suitable for occasions with limited space. |
Service Life | The threaded engagement between the stem nut and the stem is easily affected by the external environment, such as dust and debris, which may shorten the service life. | The engagement between the stem nut and the gate is inside the valve body and is less affected by the external environment, so the service life is relatively long. |
Maintenance Difficulty | Maintenance is relatively simple. The threaded engagement between the stem nut and the stem is easy to check and clean. | Maintenance is relatively difficult. It is necessary to remove the valve bonnet to check and clean the engagement between the stem nut and the gate. |
III. APPLICATION SCENARIOS
Rising Stem Gate Valves
Applicable Scenarios: It is suitable for occasions where there is an intuitive requirement for the opening degree of the valve, such as pipeline systems that need to frequently adjust the flow rate. Its intuitive operation mode enables operators to quickly judge the opening state of the valve, thus realizing precise flow control.
Typical Case: In the material conveying pipelines of chemical plants, rising stem gate valves are often used to control the flow rate of materials. Operators can quickly adjust the opening degree of the valve by observing the lifting position of the stem to ensure the stability and accuracy of material conveying.
Non-rising Stem Gate Valves
Applicable Scenarios: It is suitable for occasions with limited space, such as underground pipelines and inside equipment. Its compact structural design enables it to open and close the valve within a limited space without affecting the normal operation of other equipment.
Typical Case: In the urban underground water supply pipeline system, non-rising stem gate valves are widely used at the branches and maintenance nodes of the pipelines. Due to the limited underground space, the compact structure of non-rising stem gate valves enables them to adapt well to this environment. Meanwhile, their good sealing performance and long service life also ensure the stable operation of the water supply system.
IV. PRICE AND COST
Rising Stem Gate Valves
Price Factors: Since the structure of RISING STEM GATE VALVES is relatively simple and the manufacturing cost is low, their market prices are relatively affordable. In addition, their maintenance cost is also relatively low, further reducing the overall cost during the use process.
Cost-effectiveness: For some application scenarios that are sensitive to cost, such as small chemical enterprises or local renovation projects of municipal water supply systems, rising stem gate valves are a highly cost-effective choice.
Non-rising Stem Gate Valves
Price Factors: The structure of NON-RISING STEM GATE VALVES is relatively complex, and the manufacturing process requirements are relatively high, so their market prices are usually higher than those of rising stem gate valves. Meanwhile, their maintenance cost is also relatively high, especially when frequent disassembly and cleaning are required.
Cost-effectiveness: Although the prices of non-rising stem gate valves are relatively high, in some occasions where space requirements are strict and long-term stable operation is needed, such as inside large industrial equipment or underground pipeline systems, their good sealing performance and long service life can effectively reduce the maintenance frequency and repair cost of equipment, thus showing high cost-effectiveness in the long-term use process.
V. SUMMARY
BOTH RISING STEM and NON-RISING STEM GATE VALVES have their own advantages and disadvantages and are suitable for different application scenarios. Rising stem gate valves have a simple structure, intuitive operation, and convenient maintenance, and are suitable for occasions where there is an intuitive requirement for the opening degree of the valve and space allows. While non-rising stem gate valves have a compact structure, good sealing performance, and a long service life, and are suitable for occasions with limited space and the need for long-term stable operation. When choosing gate valves, comprehensive considerations should be made according to specific usage requirements, installation environments, budgets and other factors to ensure that the most suitable type of gate valve is selected, thus realizing the efficient and stable operation of the pipeline system.
