Knife Gate Valves shouldn't be used to regulate flow because whenever fluid is forced against a partially closed gate, a vibration takes place, gradually eroding the disk and seat. Consequently, knife gate valves should only be used completely closed or opened. In addition, these valves are designed to slowly open and close to safeguard against the impacts of water hammer.

TVCCL knife gate valve is a specialized type of gate valve designed primarily for on-off and isolation services in systems with viscous and slurry-type media. Here's an overview of the effects and benefits of using a knife gate valve:

Features

• Effective Shut-off for Slurry Media: The primary effect of a knife gate valve is its ability to provide a tight shut-off in systems that transport slurry, pulp, or other viscous media. The "knife" edge of the valve can cut through the slurry, ensuring a tight closure.
• Compact Design: Knife gate valves are typically more compact than traditional gate valves, making them suitable for installations where space is a constraint.
• Cost-Effective: Generally, knife gate valves are more cost-effective than other types of specialized slurry valves.
• Versatility: They can be used in a variety of applications, including wastewater treatment, paper and pulp industries and mining, among others.
• Reduced Clogging: The design of the knife gate valve helps in reducing the chances of media clogging, especially when dealing with particulate or fibrous media.
• Quick Operation: Many knife gate valves are designed for quick operation, allowing for rapid opening and closing, which can be crucial in certain applications.

Please note that Knife-Gate valves are only to be used in fully open or fully closed positions to control fluid flow and are unsuitable for throttling to avoid high-speed fluid flow through the disc and seat which can cause erosive effects, seat and disc abrasion, and vibration from fluid impacting the disc, leading to damage of the disc and seat.

TVCCL knife gate valve is a type of valve designed to control the flow in a system. It consists of a gate that is sharp on the bottom edge, which allows it to cut through thick liquids or slurry materials that would clog other types of valves.
The design of a knife gate valve includes a sharpened blade that can cut through the medium it controls, making it especially useful in applications dealing with sludge, viscous fluids, or solids in suspension.
Knife gate valves are similar in design to gate valves and were initially developed for use in the pulp and paper industry. As the name implies, these valves can cut through thick, porous media that may contain a high concentration of suspended solids (such as dense, sewage sludge) which had caused problems with valves not seating completely and thus leaking.

TVCCL knife gate valve works by lifting a plate with a planar or “knife” edge from the path of flow that can literally cut through various impediments during closing thereby creating complete closure against a soft sealing surface. This soft sealing surface generally dictates use in rather low-pressure systems and is not designed to handle high pressure. Both gate and knife gate valves are primarily designed for isolation or on/off service rather than a throttled or partial-flow application.
TVCCL 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.
Knife gate valves are easy to actuate, they have a relatively low weight and are cost-effective.
Knife gate valves should only be used for applications requiring a completely open or completely closed position and should not be used to regulate flow unless they are designed for it.

In summary, the primary effect of a knife gate valve is to provide reliable isolation and control in systems that handle challenging media, such as slurry or viscos fluids. Their design ensures effective shut-off, reduced clogging, and efficient operation.

Specification

• Body Connection: Lug type,Flange type
• (Other flange connection please contact Taiwan Valves Centre Co., Ltd.)
• *Technical information is only for reference. Taiwan Valves Centre Co., Ltd. reserves the right to change without previous notice.

Applications

• Applicable medium: plastic granules, pulp, wood pulp, fiber, dust, chemical treatment sewage, silo export, fruit, grain, cement slurry, etc.
• Knife Gate Valve generally used in powders, granules containing particles, cellulosic, impurities, etc.
• Widely used in dust collection equipment, powder lining equipment, sewage treatment, carton supply equipment, etc.
• The applicable places are mostly industrial air transportation occasions, pulp, fertilizer, cement, ash, lime, raw food materials and other industries or sludge treatment, sewage treatment and other factories.
• Knife-Gate valves are generally not recommended for throttling service, where both the fluid flow and the solid particles can damage seats causing leakage. High fluid velocity or the presence of solid particles in suspension will further reduce seat life in throttling applications.
• Knife Gate Valve were designed to work in some of the most corrosive, erosive and abrasive environments in the world.

More Knowledge about TVCCL valve:

Knife Gate Valves's resilient seat knife gate is a bi-directional valve and could be applied with the flow in any direction. Knife Gate valve can be divided into two operation - manual and pneumatic. The valve is designed for the full circular direct current channel to reduce slag and jamming. The bottom end of the blade is machined into a blade shape with a cutting function, so the Knife Gate valve has a good cutting function for soft materials such as fiber, pulp, and wood pulp. Benefits are good opening and closing, Easy to install, wear-resistant and anti-blocking measures, easy to maintain, easy to use and long life. At first, Knife gate valves were designed for use in the pulp and paper industry. Knife gate valve was an ideally designed to cut through the stringy pulp encountered in the pulp and paper industries. The benefits of the knife gate valve also include that they are easy to actuate and cheap to produce. As a result, use of knife gate valves quickly expanded into numerous other markets, including wastewater treatment, oil and gas, mining, and power, in a short period of time. Otherwise, Knife gate valves became advantageous in sludge and slurry applications because their blades can cut right through thick liquids easily. Today, a knife gate valve can be found in many processing plants. Knife gate valves are available in large sizes to better handle thick flows of heavy oils, light grease, slurry, paper pulp, varnish, and wastewater.
The valve plate material is generally selected from stainless steel 304.316, and other materials are welcome to contact us for consultation.

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