Production introduction
Foinbo® gate valve is a linear-motion valve that uses a sliding gate to start or stop fluid flow. When fully open, the gate retracts into the valve body, creating an unobstructed pathway with minimal pressure drop. When closed, it forms a tight seal, preventing leaks. Unlike globe or ball valves, gate valves are not intended for throttling (flow regulation) but for fully open or closed positions, making them ideal for fire protection systems where precise control is less critical than reliability.
Types of Gate Valves in Fire Fighting
Fire fighting gate valves come in two primary configurations:
- Rising Stem (RS) Gate Valves: The stem rises as the valve opens, providing visual confirmation of its position. These are commonly used in above-ground installations where operator visibility is essential.
- Non-Rising Stem (NRS) Gate Valves: The stem remains stationary, while the gate moves vertically via internal threads. NRS valves are preferred for underground installations or confined spaces where vertical clearance is limited.
Product specification
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Specification |
Z41X - Fire Gate Valve Flanged |
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2" |
2.5" |
3" |
4" |
5" |
6" |
8" |
10" | 12" | |
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Rated Operation Pressure |
1.6Mpa |
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Application Medium |
Water ,Foam mixture |
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Connection Type |
Flange End |
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Body Material |
Ductile Iron |
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Installation |
Vertical |
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Flange Standard |
BS4504 |
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FAQ
Q: What is the primary function of a gate valve in fire fighting systems?
A: To fully open or close water flow, providing a leak-proof seal when closed.
Q: How does a rising stem (RS) gate valve differ from a non-rising stem (NRS) valve?
A: RS valves have a visible rising stem for position indication; NRS valves are compact for underground use.
Q: Why are gate valves not suitable for throttling (flow regulation)?
A: Throttling causes vibration and rapid wear of the gate and seats.
Q: What is the purpose of a bonnet in a gate valve?
A: To protect the stem and packing from debris and external damage.
Q: Can gate valves be used for steam or gas applications in fire systems?
A: No, they are designed for water-based fire suppression fluids only.