2023年1月19日 · Gate valves offer low resistance to fluid flow when opened but require more force than other types of valves to operate them due to their heavy construction. Knife gate valves are similar to gate valves but they use a sharp edge or “knife” instead of a solid disk as part of their construction.

While knife gate valves and gate valves share many similarities – they’re both used in on-off applications, involving slurries and other viscous media – there are some noteworthy design variances to consider when weighing up which type of …

2025年1月7日 · Gate valves are mainly used as on/off valves rather than for throttling flow. A knife valve uses a metal gate with a sharpened bottom edge to cut through fluid. As the gate is raised, the sharpened edge “knife” lifts out of the seat and allows fluid to flow through the full bore.

2024年12月2日 · Knife gate valves use a packing gland that seals around the gate. This straightforward design makes knife gate valves easier to maintain and more reliable in dirty or thick media. Gate valves usually have a wider, flanged body that meets ANSI pressure ratings and API leak tightness standards.

2022年9月7日 · In brief, a knife valve employs a blade to cut through thick fluids, while a gate valve uses a slide plate to shut off the flow of dry bulk material. The sharp and beveled edge of a knife valve makes it ideal for large-sized applications involving varnish, paper pulp, light grease, and wastewater.

2025年1月12日 · Both knife valves and gate valves have specific uses. Knife valves are good for thick fluids and cost less. Gate valves are good for water, oil, and gas and can handle high pressure.

2024年9月9日 · Knife gate valves rely on a sharp gate that cuts through the material, making them better suited for slurries or solids-laden fluids. In contrast, gate valves use a vertical gate, often wedge-shaped, to block or allow fluid passage, which works better for clean liquids.

2022年6月19日 · Knife gate valves are designed mainly for on-off and isolation services in systems with high content of suspended solids. Knife gate valves are especially beneficial for handling slurry in addition to viscous, corrosive, and abrasive media.

2023年4月25日 · A gate valve has a v-ring packing set that seals the shaft attached to its gate, while a knife valve has a packing gland that seals around the gate. A knife gate valve is usually uni-directional (though bi-directional is an option on some models), and comes in either a lugged or wafer body with no flanges.

2024年12月3日 · While both gate valves and knife gate valves serve the primary function of regulating flow, their design and intended application differ significantly. Gate valves are best suited for clear, fluid flows, whereas knife gate valves excel in handling mixed or solid materials.