Rubber lined knife gate valve

Rubber lined knife gate valve is a valve that is lined with rubber material on the inner wall of the gate or valve body, mainly used for fluid control of corrosive, abrasive or high-purity media. The following is a detailed explanation of its core features and technical parameters:
1、 Structural characteristics
Valve body and lining
The valve body is usually made of cast iron, carbon steel or stainless steel, and the inner wall is lined with rubber (such as EPDM, NBR, fluororubber, etc.) to enhance corrosion resistance.
The surface of the gate is covered with rubber or lined with rubber to prevent direct contact between the medium and metal components.
Sealing design
Adopting rubber rubber soft seal to achieve bidirectional sealing with low leakage rate, suitable for high-purity or toxic media.
Some models are equipped with U-shaped sealing strips or hollow rubber strips, which compensate for wear through elastic deformation and extend the sealing life.
Drive mode
Supports multiple operation modes such as manual, pneumatic, and electric, and some models are equipped with intelligent actuators with waterproof, rust proof, and limit protection functions.
2、 Technical parameters
Nominal diameter: DN15-DN500, some models can reach larger diameters.
Pressure rating: PN6~PN25, suitable for atmospheric to medium high pressure conditions.
Temperature range: -20 ℃~+150 ℃, depending on the rubber material (such as EPDM temperature resistance ≤ 120 ℃).

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