Cast iron gate valves and cast iron butterfly valves are the most commonly used valves in the pipeline, the two types of valves have the same purpose and working pressure, and both control the flow of media in the pipeline through the opening and closing of the valve disc. The following are the advantages and disadvantages of cast iron gate valves and cast iron butterfly valves, the choice of valve is based on the actual needs of the pipeline application.

Cast iron gate valve:

Cast iron gate valves control the fluid flow through the valve disc that can slide up and down.

Advantages:

1. cast iron gate valve can bear high pressure, high temperature and other demanding working environment, gate valve valve disc has better sealing performance than butterfly valve plate when it is closed, preventing any leakage.

2. The valve disc provides a straight path for fluid flow after it is fully opened, minimizing the pressure drop.

3. cast iron gate valves have greater wear resistance and better service life.

Disadvantages:

1. Slow operation, cast iron gate valve needs several rotations to fully open or close.

2. Cast iron gate valves are mainly designed for fully open or fully closed position, in half-open state is easy to cause damage.

3. Gate valves are sensitive to debris and deposits in the fluid, improper operation easily causes damage to the valve disc thus affecting the sealing performance.

Cast iron butterfly valve:

Cast iron butterfly valves control the fluid flow by moving the valve plate from side to side.

Advantages:

1. Quick operation, only need to turn a quarter turn to reach fully open or close, so as to realize faster operation.

2. Lower production costs, cast iron butterfly valves are usually more than 20% less expensive than gate valves in the same specification.

3. Compact and lightweight, cast iron butterfly valves are smaller in volume and unit weight than cast iron gate valves, making them easier to install and maintain.

Disadvantages:

1. cast iron butterfly valves have lower press