Comparison Between Gate Valves and Butterfly Valves in Pipeline Systems

1. Selection and Application Principles
In practice, butterfly valves are often preferred for large-diameter pipelines due to their compact structure and light weight, while gate valves are favored where tight sealing and long service life are critical.
Field experience shows that butterfly valves have a higher failure rate over long-term use, so expanding the use of gate valves is recommended whenever installation conditions allow.

2.Advantages of Resilient (Soft-Seated) Gate Valves
In recent years, many manufacturers have developed soft-seated gate valves, which offer the following advantages over traditional wedge or double-disc types:

Precision cast body and bonnet — one-piece casting, minimal machining, and no copper sealing rings, reducing material costs.
Flat-bottom design — prevents debris accumulation and ensures reliable operation.
Standardized rubber-coated gate dimensions — high interchangeability and easy maintenance.

The rubber-coated gate is the key component, requiring advanced bonding and molding technology — many assemblers source this part from reliable specialized suppliers.

Some manufacturers embed the copper nut block within the rubber gate to form a single unit, preventing rubber separation during operation — though it requires high concentric precision.

Operational Tip:
Avoid excessive closing torque — once sealed, stop turning. Over-tightening can damage the rubber or make reopening difficult. Use torque wrenches for better control.

3.Characteristics and Applications of Butterfly Valves
The butterfly valve, also known as a disc valve, features a simple structure and quick operation. It is widely used in low- and medium-pressure pipelines.
Applicable media include air, water, steam, oil, slurry, corrosive and even radioactive fluids.

Key Features:
Compact and lightweight design
Quick quarter-turn operation
Cost-effective for large diameters
Moderate sealing, higher flow resistance than gate valves

4.Summary
For municipal water and distribution systems, soft-seated gate valves are the preferred choice for reliable sealing and long service life.
For large-diameter or space-constrained applications, butterfly valves provide a lightweight and cost-effective alternative.