Swing Tilting Disc vs Butterfly Tilting Disc Check Valve: Structure, Application and Selection Guide

2026-07-22

Tilting disc check valves are widely used in municipal water supply, sewage treatment, pumping stations and industrial circulating water systems for backflow prevention and pipeline protection. In actual engineering procurement,swing tilting disc check valve and butterfly tilting disc check valve are the two most common types. Although both belong to the tilting valve series and feature low flow resistance compared with traditional check valves, their mechanical structures, closing principles and applicable working conditions vary greatly. This article analyzes their core differences and provides professional selection guidance for pipeline engineers.

The swing tilting disc check valve adopts a single-piece disc and edge hinge swing structure, usually equipped with an external counterweight for reset assistance. The entire valve disc swings around the side hinge to complete opening and closing movements. This straight-through structural design delivers extremely low fluid resistance and large flow capacity, making it highly suitable for large-diameter main pipelines. With fewer internal vulnerable parts, the swing tilting structure is robust, durable and easy to maintain. Its only shortcoming is the relatively long swing stroke, which results in slower closing speed and limited water hammer resistance, making it more suitable for pipelines with stable and continuous flow.

Different from the swing type, the butterfly tilting disc check valve adopts a central shaft double-disc symmetrical tilting structure. The two semicircular discs tilt at a small angle to realize opening and closing, featuring a shorter stroke and faster response. Equipped with built-in spring assistance, the valve can achieve precise two-stage slow closing, which effectively absorbs reverse flow impact and suppresses water hammer and pipeline vibration. Compact and lightweight, the butterfly tilting design saves installation space and performs excellently in frequent start-stop scenarios, such as pump station outlets and industrial circulating water pipelines.

Comparison Items	Swing Tilting Disc Check Valve	Butterfly Tilting Disc Check Valve
Internal Structure	Single disc, edge hinge swing design	Double discs, central shaft tilting design
Closing Performance	Long stroke, slow closing, basic anti-backflow	Short stroke, fast & buffered closing, anti water hammer
Flow Resistance	Ultra-low resistance, maximum flow rate	Low resistance, stable flow performance
Maintenance & Volume	Simple structure, easy maintenance, larger size	Compact structure, lightweight, space-saving
Best Application	Large-diameter stable water supply trunk lines	Pump stations, frequent start-stop and narrow pipe networks

For practical selection, users can follow clear criteria. Choose swing tilting disc check valves for large-bore, long-distance water transmission pipelines that prioritize high flow capacity and stability. Select butterfly tilting disc check valves for pump outlet systems and industrial pipelines requiring anti-vibration and water hammer protection. Reasonable valve selection effectively improves pipeline safety and reduces long-term operational failures.