Manual Operation Gate Valve

what is manually operated gate valves？

A mechanical tool used to start, stop and control the opening and closing of gate valves. The function of the gate valve is to control the flow of liquid, gas, gel, powder and other media in the pipeline. This can be done manually or automatically.

Driven by handwheels, gearboxes, and levers, the valves that control the opening and closing of the valve are called manually operated gate valves. The gate valve that handles the switching and flow adjustment of the valve through electric actuators, pneumatic actuators and hydraulic actuators is called an automatic control gate valve.

Cast Iron, Carbon Steel, Stainless Steel, Chrome Alloyed Brass, Bronze, Hastelloy, Inconel, Monel, Titanium, Alloy 20, and PVC are the materials used to manufacture manually operated gate valves.

manually operated gate valves, also known as a hand operated gate valve, are joined together via lug and wafer connections, butt welding, threaded connections, socket welding, and flange connections.

Each pipeline system has its own most suitable valve, you can provide the demand according to the actual situation, and we will help you choose the most suitable valve.

manually operated gate valves Description：

When the manually operated gate valves is closed, the sealing surface can only rely on medium pressure to seal; specifically, the sealing surface of the gate must be pressed against the valve seat on the opposing side in order to ensure the sealing of the self-sealing sealing surface. The majority of gate valves require external force to seal, meaning that in order to guarantee the tightness of the sealing surface, the gate must be pressed to the valve seat when the valve is closed.

Advantages of manually operated gate valves:

Manually operated gate valves do not require any energy assistance, and manually operated gate valves can also be used when laying electrical wires and compressed air lines is not possible.

Disadvantages of manually operated gate valves:

Of course, its shortcomings are also very obvious. The gate valve driven by a pure handwheel has a very slow opening and closing speed, so in an emergency, it cannot guarantee the instant closing and opening of the gate, so it can only be used in some safety valves. High reliability, and long-term open or long-term closed occasions.

Configuration type：

Hand operated gate valves include the widest range of configuration types, differentiated by the type of gate, how they rise on the stem, and their seat configuration. Some examples include:

Parallel slide gate valve

wedge gate valve

Pressure Sealed Gate Valve

Knife Gate Valve

rising stem gate valve

Non-rising stem gate valve

Bolted Bonnet Gate Valve

Welded Bonnet Gate Valve

External screw and yoke gate valve for short (o&ys gate valve)

Application of Manual Operation Gate Valve：

Gate valves that are actuated by a handwheel open slowly, reducing the risk of water hammer damage. These valves are used in a variety of industrial applications, such as the regulation and cutting of energy systems, drinking water, sewage, construction, petroleum, chemical, food, medical, textile, electric power, shipbuilding, and metallurgy pipelines.

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