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German standard F4 gate valve
The German standard F4 gate valve is cast using ductile iron material QT500-7. Compared to the QT450-10 used by most manufacturers in the industry, this material has a higher spheroidization rate, good tensile strength, and toughness, reducing the risk of...
Product Details
1. Ductile iron is finely cast and not easily cracked or frozen. The valve body is made of ductile iron material QT500-7, which has a higher spheroidization rate, good tensile strength, and toughness compared to QT450-10 used by most manufacturers in the industry. It reduces the risk of valve body cracking caused by violent home decoration and is also less prone to freezing cracking due to cold weather
2. Special process spraying of valve body, excellent effect to prevent corrosion and rust
Powder epoxy resin is used for electrostatic coating on the inside and outside of the valve body, with a spraying thickness of 250 or more on both inside and outside, excellent effect to prevent corrosion and rust caused by contact between the valve body and the medium, and can be used in a dry sewage system.
3. The valve plate is covered with EPDM rubber as a whole, which has stable sealing performance.
The valve plate is covered with EPDI rubber as a whole, and the rubber is firmly connected to the ductile iron gate plate, which is not easy to fall off and has good elastic memory, thus protecting the stable sealing performance of the valve.
4. Three "0" ring sealing ring design, low switch force
The valve stem is made of 2Cr13 material and adopts three "0" ring sealing ring design, which makes the valve stem rotate unobstructed, avoids medium leakage, and can be replaced without stopping water construction.
5. The stem nut made of brass material makes the switch smoother.
The stem nut and positioning device are made of brass material, which makes the switch smoother and avoids the phenomenon of sticking during operation.
6. POM sealing shaft sleeve fully isolates the contact surface between the valve body and the valve stem. POI material sealing shaft sleeve has good hardness and is not easy to wear, and will not cause thermal expansion and contraction due to hot and cold weather. Because its material is not prone to dry iron reaction, it will not cause the valve stem to lock regardless of its service life7. Dust cover design reduces the entry of foreign objects and fluids. A plastic dust cover is installed on the top of the valve shaft to greatly prevent rusting caused by wind, sand, and rainwater infiltration
