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Product Introduction
In harsh working conditions with particles, fibers and slurry media, such as mining, papermaking, sewage treatment, chemical industry and power plant ash removal, conventional valves are prone to jamming, leakage and bulky installation. By contrast, the knife gate valve features an ultra-thin structure, powerful cutting performance and anti-deposition design, making it the preferred shut-off valve for such complex operating environments.
Technical Parameters
- Design & Manufacturing Standard: MSS SP-81-2006
- Size Range: DN50~DN800
- Flange Connection Standard: WCB, CF8, CF3, CF8M, CF3M
- Working Pressure Rating: DN50~DN250 10Bar、DN300~DN450 7Bar、DN500~DN600 4Bar、DN700~DN1200 2Bar 、DN1400~DN2000 1Bar
Product Introduction: Precision cast knife gate, reliable on-off.
Product Types of Knife Gate Valve
Classified by structure, actuation and sealing forms, multiple types are available to meet diverse working conditions:
By Structure
- Open-frame Knife Gate Valve: With exposed stem for easy visual position indication of open and closed status.
- Closed-frame Knife Gate Valve: Built-in stem design, dustproof and moisture-resistant, ideal for harsh environments.
By Actuation Mode
- Manual Knife Gate Valve: Operated by handwheel or bevel gear, featuring low cost and simple operation.
- Pneumatic Knife Gate Valve: Cylinder-driven with fast response, explosion-proof performance, suitable for automated systems.
- Electric Knife Gate Valve: Equipped with electric actuator, supporting remote control and position feedback.
By Sealing Type
- Soft Seal: Adopts rubber / fluororubber material with excellent tightness, applicable for medium and low pressure.
- Hard Seal: Hardfaced with cemented carbide, wear-resistant and high-temperature resistant, perfect for particle-laden media.Available in single-sided seal and bidirectional seal to satisfy various pipeline requirements.
Application Scenarios: Why Choose a Knife Gate Valve?
The knife gate valve is a dedicated shut-off valve designed for impurity-containing media. Its gate with sharp cutting edges can efficiently shear fibers and slurry, making it ideal for large-diameter and low-pressure pipelines.
Typical Applicable Industries
- Mining & Power: Coal washing slurry, ash and slag slurry, tailings transportation
- Paper & Pulp Making: High and low consistency pulp, white water system
- Chemical & Environmental Protection: Viscous resin, kitchen waste slurry, dust materials
- Powder Conveying: Flow cut-off for grain, feed and chemical powder
- Sewage Treatment: Mud, dirt and suspended solids wastewater
Core Advantages
- Minimal Flow Resistance: Valve body without cavity, no material accumulation during gate movement, ensuring smooth medium flow.
- Powerful Cutting Performance: Beveled cutting edge on the gate effectively shears fibers and slurry to prevent jamming and blockage.
- Lightweight Structure: 20%-30% lighter than conventional gate valves, saving installation space and pipeline load.
- Reliable Sealing Performance: Available in soft seal / hard seal and bidirectional seal, adaptable to various pressure and corrosive working conditions.
- Flexible Actuation Options: Manual, electric and pneumatic types optional, meeting on-site operation and remote automatic control demands.
On-site Case: Stable Operation
Pneumatic knife gate valves feature rapid opening and closing, superior shearing performance, and excellent anti-blocking capability, which have been widely applied in various industrial fields.In the animal husbandry industry, they are well suited for manure treatment as well as feed and powder conveying, delivering reliable sealing and stable operation. In the resin industry, the pneumatic knife gate valve handles high-viscosity and adhesive media, realizing smooth cut-off and leak-tight control. For kitchen waste treatment projects, it efficiently manages complex media with abundant fibers and sundries, ensuring stable operation of crushing, pressing and conveying systems.Widely serving biotechnology, food manufacturing, leading agricultural enterprises and other sectors, it provides stable and reliable fluid control solutions for diverse severe working conditions and has gained high recognition from global customers.
Selection and Recommendations
How to Select the Right Valve?
- Medium Characteristics: For media containing particles or fibers, hard seal is preferred. For corrosive media, select stainless steel or fluorine-lined materials.
- Control Requirements: Pneumatic or electric types (with position feedback) are recommended for automated conditions; handwheel or bevel gear for manual operation.
- Working Pressure: Wafer-type knife gate valves are specially designed for large-diameter and low-pressure pipelines to avoid difficult opening and closing.
- Installation Environment: Wafer structure for limited installation space; concealed stem type for dusty and humid working conditions.
Daily Maintenance Guidelines
- Installation Specifications: Vertical installation is recommended. Rigid supports shall be equipped for sizes DN≥800. Confirm the medium flow direction and fasten bolts diagonally and evenly.
- Operation Notes: For electric and pneumatic valves, perform inching test operation first to prevent impact damage caused by excessive operating speed.
- Regular Maintenance: Inspect sealing surfaces, packing and fasteners on a regular basis. Lubricate manual mechanisms periodically.
- Storage Requirements: For long-term storage, keep the valve fully open and store in a dry and well-ventilated area to prevent rust and corrosion.
Why choose VATTEN Valve?
In the valve market with serious homogenization, the reason why our knife gate valves can stand out lies in the core of "controllable quality and thoughtful service":
- Strict Quality Control: Every valve undergoes 100% testing to ensure 100% qualification before leaving the factory.
- Customized Service: We can customize exclusive materials and structures according to working conditions, caliber and pressure rating to adapt to non-standard scenarios.
- High-Quality Service: A professional technical team provides one-on-one guidance on selection and installation, regular return visits and maintenance to solve worries and problems.
- Cost-Effectiveness: Compared with imported products, it has more advantages in price. For industrial production, choosing the right valve makes half the effort!
If you are troubled by problems such as medium blockage, valve wear and seal failure, if you need a knife gate valve that is suitable for complex working conditions, worry-free and durable, please feel free to contact us!
VATTEN Valve's professional team provides you with free selection and customized solutions, ensuring that every inch of the pipeline can operate stably and efficiently!
