Here is the comparison of the three major gate valves in water systems. Which one do you prefer?
In water systems, gate valves, as critical components for fluid control, directly impact the safety and efficiency of the system. Today, Landee Valve unveils the three commonly used gate valves in water systems: non-rising stem gate valves, rising stem gate valves, and brass gate valves.
I. Non-Rising Stem Gate Valves
01 Structure of Non-Rising Stem Gate Valves:
It is composed of the valve body, valve disc (also known as the gate), valve cover, valve stem, packing device, handwheel, and connecting components.
02 Working Principle:
By rotating the handwheel, the internal stainless steel valve stem is driven to move up or down, thereby controlling the lifting of the ductile iron valve disc (gate) between the valve seats. This mechanism opens or closes the pipeline. When fully open, the medium flows freely. When fully closed, a sealed shut-off is achieved.
03 Advantages and Disadvantages:
Advantages:
1. Excellent sealing performance, and preventing leakage
2. Low flow resistance and pressure drop
3. Simple operation—just rotate the handwheel
4. Wide range of applications, such as fire protection and water supply or drainage systems.
Disadvantages:
1. It requires specific installation space.
2. The position of the valve disc cannot be visually determined.
3. Maintenance is relatively complex, requiring disassembly of the valve cover.
II. Rising Stem Gate Valve
01 Structure of Rising Stem Gate Valves:
It consists of the valve body, valve disc, valve cover, valve stem, packing, and handwheel. The valve stem directly passes through the valve cover, allowing its lifting status to be visually observed.
02 Working Principle:
Rotating the handwheel drives the stainless steel valve stem to move up or down outside the valve cover, thereby controlling the lifting of the valve disc inside the valve body. When the valve disc rises, the medium flows. When it lowers, it seals with the valve seat, achieving pipeline shut-off.
03 Advantages and Disadvantages:
Advantages:
1. Excellent sealing performance, effectively preventing leakage
2. Low pressure drop, minimizing impact on fluid flow
3. The lifting status of the valve stem is visually observable, facilitating operation and maintenance.
Disadvantages:
1. Compared to non-rising stem gate valves, it may occupy more external space.
2. In certain environments, the exposed part of the valve stem may require additional protection to prevent corrosion or damage.
III. Brass Gate Valves
01 Structure of Brass Gate Valves:
It’s composed of the valve body, valve disc (gate), valve cover, valve stem, packing, and handwheel.
02 Working Principle:
By rotating the brass handwheel, the valve stem drives the brass valve disc to move up or down inside the valve body. When the valve disc rises, the medium flows freely. When it lowers, it tightly seals with the valve seat, achieving pipeline shut-off.
03 Advantages and Disadvantages:
Advantages:
1. Exceptional sealing performance: Effectively prevents medium leakage, ensuring system safety
2. Low flow resistance and pressure drop: Minimal impact on fluid flow, ensuring smooth operation
3. Strong corrosion resistance: Brass material adapts to various environments, extending service life.
Disadvantages:
1. Limited pressure resistance: Attention must be paid to the working pressure range to avoid overpressure use.
2. Performance affected by environmental conditions: Performance may degrade under poor temperature and pressure conditions.
Conclusion
1. Whether you prefer the concealed and efficient non-rising stem gate valve
2. Or favor the visually intuitive and convenient rising stem gate valve
3. Or prioritize the corrosion-resistant brass gate valve
Landee Valve offers high-quality products to meet your needs. Choosing Landee Valve means choosing safety and reliability!
