Why Use Butterfly Valve Instead Of Gate Valve?

butterfly valves are in many cases easier to select than gate valves. This is mainly due to their advantages in installation space, operational efficiency and cost control. They also meet the requirements of most low and mediumpressure fluid systems, especially for applications with high switching speed and spatial requirements.
This choice is essentially a matter of "demand adaptation" -butterfly valves provide higher overall cost-effectiveness when the system does not require the ultra-high seal or high pressure tolerances of gate valves. This can be analysed from four key dimensions:
1.Installation and space: smaller size and better adaptability
The design of butterfly valve makes the space utilization rate of butterfly valve significantly higher than gate valves, which is one of the core reasons of butterfly valve upgrade.
Butterfly valves are thinner: gate valves require ample longitudinal space (long stem length) to lift and lower the gate disc. butterfly valves, however, are opened and closed by rotating discs and are only 1/3 to 1/2 the height (or length) of gate valve of the same diameter. This makes them suitable for enclosed spaces such as tight pipes, ceilings or inside equipment. Lighter Weight: In the same specification, butterfly valves weight is usually 1/4- 1/2 the weight of gate valves. There is no need to strengthen the brace during installation, which reduces the difficulty and cost of construction. Suitable for large caliber pipes (such as DN300 and above).
2.Operation efficiency: faster on and off, Efficient Operation.
In the case of frequent opening and closing or rapid control, butterfly valves operation efficiency is much greater than gate valves.
Fast opening and closing speed: gate valves requires to rotate multiple times to fully open or close (for example, a DN100 gate valve may require 10 to 20 rotations), while the butterfly valves only requires to rotate 90 degrees (about 1 to 2 rotations). These butterfly valves are suitable for systems that require emergency shutoffs or frequent adjustments (e.g., air conditioning water systems and sewage treatment valves).
Low Operating Torque: The butterfly valve's disc has the most minimal resistance during rotation, making manual operation more labor-saving. Large caliber gate valve often needs speed reducer, operation is complicated and time consuming. Cost and maintenance: reduced procurement and Maintenance Costs
From the point of view of lifecycle cost, butterfly valves has superior economic benefits, especially suitable for large-scale applications.
Cost of Procurement Cost: butterfly valves are cheaper to manufacture for valves of the same diameter and pressure class, typically 30%-50% cheaper than gate valves, significantly reducing procurement budgets for large pipeline projects.
Easy to maintain: Butterfly valve structure is simple (core components are disc, stem and seal), fewer points of failure. Gate valves, on the other hand, have multiple perishable parts, such as discs, seats and packing boxes. Over time, the disc adhesions and packing leakage tend to occur, making maintenance more difficult and expensive.
4. Flow control: Better Adjustment Performance
While both can be used to close, butterfly valves offer greater flexibility in flow regulation, covering a wider range of scenarios.
Fine tuning: By controlling the angle of rotation of the disc (e.g., 10°, 30°), the flow can be precisely tuned to systems that require flow control (e.g. irrigation pipelines and transport of industrial media). Gate valves are poor adjustability: they are only suitable for "all open" or "all closed" positions. As a result of media erosion, if partially opened, gate disc can easily wear on the sealing cover, it is not possible to carry out precise flow control, can only be used as a closing valve.
Note that butterfly valves are not a complete substitute for gate valves --gate valves remain gate valves high-pressure (e.g., ≥10 MPa), high sealing requirements (e.g. delivery of toxic media, vacuum systems), or high-temperature applications. If your system has specific pressure and media requirements, would you like me to compile a butterfly valve and gate valve compatibility comparison table? This clearly identifies the preferred options for each operating condition to help you avoid selection errors.