Hidden stem protective gate valve

Hidden stem protective gate valve is a specially designed gate valve, with the valve stem inside the valve and not exposed outside the valve body.

structural characteristics

Valve stem design: The valve stem rotates inside the valve and is connected to the gate through threads. The valve stem threads are not exposed to the external environment, which can effectively prevent corrosion or damage to the valve stem caused by the external environment.

Sealing structure: Soft sealing design is usually adopted, and the gate plate is sealed with integral rubber. The valve stem is sealed with three "O" rings, which has good sealing performance, low friction resistance, lightweight opening and closing, and no water leakage.

Valve body material: Generally made of ductile iron, lightweight, easy to install, and the inner cavity is often coated with epoxy resin to prevent corrosion and rust. It can be used in drinking water and sewage systems.

Flat bottomed valve seat: The bottom adopts the same flat bottomed valve seat design as the water pipe, which does not produce debris accumulation and is conducive to maintaining sealing performance.

working principle

Turning the handwheel drives the valve stem to rotate, and the valve stem cooperates with the nut inside the gate to convert the rotational motion into the linear lifting motion of the gate, thereby achieving the opening and closing of the valve. The valve opens when the gate rises and closes when it descends. Due to the valve stem not being exposed, the valve opening and closing status is usually determined by the number of turns of the handwheel or the scale indication.

Product Features

Good protective performance: The valve stem is not exposed, avoiding the erosion of dust, moisture, corrosive substances, etc. on the valve stem, and improving the service life of the valve.

Easy and convenient operation: usually equipped with clear opening and closing indicators to help operators accurately determine the valve status, and some models also have locking functions to prevent unauthorized operation.

Small installation space: The valve stem does not move up or down, and the valve height is small, suitable for underground installation or places with limited space.

Low maintenance cost: reduces the daily cleaning and lubrication needs caused by exposed valve stems, and lowers maintenance workload and costs.

Application Industry

Widely used in industries such as petrochemicals, electricity, metallurgy, and municipal engineering. Pipelines that can be used for high temperature, high pressure, and corrosive media in the petrochemical industry; In the power industry, it can be used for power plant water supply and drainage and cooling circulation systems; It can be used in urban water supply networks, sewage treatment facilities, etc. in municipal engineering.