나이프 게이트 밸브
공칭 직경：1/2”-36”(DN15-DN900)
공칭 압력：클래스150-클래스2500(1.0MPa-320MPa)
최대 작동 온도:425℃
쉘 소재：M35-1，A105，F304，F316，F316L，WCB，WCC，CF8，CF8M，모넬 K500，Inconel 718，N06625，N10276，CF3，CF3M，CW6MC，CY40
설계 기준: API 600, ISO 10434, ASME B16.34, GB/T 12234, EN 10434, DIN 3352, JIS B2032
연결: Flange
드라이브 모드수동, 전기, 공압, 유압
나이프 게이트 밸브
제품 정의 및 안전 임무:
The Knife Gate Valve is a core piece of equipment in modern industrial pipeline systems for handling high-viscosity media containing particles and fibers. It is specifically designed to overcome the long-standing problems of ordinary gate valves in slurries, mud, and solid particulate media, such as easy clogging, seal failure, and high operating torque. This specialized Knife Gate Valve, with its blade-shaped gate design, can cut through fibrous materials. Its ultra-short structural length and smooth flow path effectively prevent media accumulation, ensuring reliable shut-off in harsh conditions such as mining, power plants, and wastewater treatment.
JH Knife Gate Technology Core
- Knife-blade gate → Gate wedge angle 5° (commonly used in the industry) | Effectively cuts off the medium
- Compact design → Ultra-short structural length (GB/T 15188.2-94) | Reduces the weight of piping systems
- Multiple sealing options → Hard seal leakage level ≤40ml/inch (MSS SP-91) | Soft seal leakage is 1/10 of the hard seal leakage.
- Low torque operation → Opening and closing torque ≤65 Nm (ISO 5211) | Easy to operate
- 제품 기술 분석
- Slurry
- Sanitary Working
- High Pressure
This industrial-grade Knife Gate Valve features a blade-shaped gate for cutting off media and an anti-clogging design. The gate’s movement direction is perpendicular to the fluid direction. It can be equipped with a flexible baffle-type sealing strip. When the valve is closed, the sealing strip is compressed to achieve a seal; when opened, the strip springs back to prevent media accumulation. It meets the MSS SP-91 hard seal standard (leakage ≤40ml/inch) or the more stringent soft seal standard (leakage 1/10 of the hard seal). The drive system is compatible with multi-turn electric actuators (AC380V power supply) or pneumatic, hydraulic, and other drive methods, ensuring stability over 50,000 operating cycles. A special sealing strip design (such as the latest patented technology) protects the valve seat and gate from abrasive wear and prevents abrasive particles from getting stuck through a cleaning plate.
Specifically designed for conveying slurries and mud containing solid particles in mining and power plants, its blade-shaped gate can effectively cut fibrous materials, and its unique valve seat and flow channel design can effectively prevent media accumulation, ensuring long-term stable operation under harsh working conditions.
핵심 디자인:
▌ Blade-shaped gate structure → Gate material 2Cr13/304/316 | Effectively cuts fibrous media
▌ Flexible O-type sealing strip → Valve seat material NBR/EPDM/PTFE | Prevents media accumulation and improves sealing performance
▌ Clamp-on connection design → Structural length conforms to GB/T15188.2-94 | Reduces installation space and supports pipe strength
▌ Anti-clogging flow channel → Ultra-short structural length | Smooth slurry flow with no residue
Designed for professional piping systems in food, hygiene, and pharmaceutical industries, the valve body features mirror-polished internal cavity to meet sanitary fluid control requirements.
핵심 디자인:
▌ Sterile polishing → Surface roughness Ra≤0.4μm (ASME B46.1) | Prevents bacterial growth
▌ Quick-release structure → Clamp connection ISO 2852 | Disassembly and cleaning time ≤ 5 minutes
▌ CIP Online Cleaning → Suitable cleaning agents with pH values of 1-14 | Compatible with SIP Online Sterilization
▌ No blind spots design → Corner radius ≥ 3mm (FDA standard) | Meets hygiene grade 3-A
Employing an enhanced valve body and guiding system, it withstands high-pressure impacts and provides high-pressure differential cutoff protection for long-distance slurry conveying pipelines and high-pressure slurry conveying systems.
핵심 디자인:
▌ Reinforced valve body → Minimum wall thickness ≥ 18mm (ASME B16.34) | Pressure safety factor ≥ 4
▌ Metal hard seal → Stellite alloy overlay weld on sealing surface | Hardness ≥ 58HRC (API 600)
▌ Four-rail positioning → Guiding system accuracy ±0.1mm | Vibration resistance improved by 80%
▌ High pressure differential design → Applicable pressure differential ≤ 6.0MPa | Breakthrough in high-pressure slurry control bottleneck
핵심 설계 및 장점
- Blade-shaped cut: The Knife Gate Valve features a blade-shaped gate design → capable of cutting through fibrous materials | eliminating slurry blockage and ensuring smooth media flow.
- 컴팩트한 디자인: Ultra-short structural length Knife Gate Valve saves installation space → Structural length conforms to GB/T15188.2-94 | Weight reduced by 35%, installation efficiency increased by 50%
- Two-way sealing: The elastic oyster-type sealing strip achieves reliable sealing → The sealing strip compresses when the valve is closed and springs back up when the valve is opened to prevent accumulation | Achieving two-way zero leakage and improving sealing performance.
- Durable and wear-resistant: Hard sealing surface combined with special sealing strip technology → The sealing strip protects the valve seat and gate from abrasive wear | Service life ≥ 100,000 cycles, maintenance intervals extended by 300%
- Fully Compatible Drives: Diverse actuators meet automation needs → Drive methods include electric, pneumatic, and hydraulic; electric actuators have an AC380V power supply | Response time ≤ 2 seconds, control accuracy ±0.5%.
- Hygiene Grade Guarantee: Hygienic Knife Gate Valve with mirror polishing and no dead angles → Surface roughness Ra≤0.4μm | Meets FDA standards and satisfies food and pharmaceutical certification requirements.
기타 제품
FAQ-Knife Gate Valve
A Knife Gate Valve is a specialized valve designed specifically for handling media containing solid particles, slurries, suspensions, and other high-viscosity substances. Its unique blade-like gate design effectively cuts through various difficult-to-handle media flows. This valve offers excellent shut-off capability, extremely low flow resistance, self-cleaning function, and outstanding wear resistance, making it particularly suitable for demanding applications in mining, paper, wastewater treatment, and other industries. It is an ideal choice for handling challenging media in modern industrial applications.
Knife Gate Valves offer distinct advantages in handling special media:
Excellent Cutting Capability: Sharp gate edge effectively cuts through fibers and solid particles
Smooth Media Passage: Full-bore design ensures unobstructed media flow
Outstanding Wear Resistance: Special hard materials extend valve service life
Easy and Quick Maintenance: Modular design facilitates rapid replacement of wear parts
Wide Application Range: Various applications from water treatment to mining slurries
Knife Gate Valves are specifically designed for various challenging media. They easily cut through fibrous materials in paper pulp handling, effectively control slurry flow containing large amounts of solid particles in mining industry, reliably handle wastewater with impurities and suspended solids in treatment plants, manage various viscous chemical slurries in chemical plants, and process materials containing pulp and seeds in food processing industry. Their unique design makes them perform exceptionally well in applications where traditional valves are prone to clogging or wear.
The following key parameters need confirmation when selecting Knife Gate Valves:
Pressure Rating Range: Various pressure classes from PN6 to PN25
Temperature Application Range: Operating temperature from -29°C to +200°C
Media Characteristics Analysis: Parameters like particle size, concentration, hardness
Body Material Selection: Carbon steel, stainless steel, wear-resistant alloys
Sealing Type Selection: Soft seal, metal seal, or composite seal
Operation Method Determination: Manual, pneumatic, electric, or hydraulic actuation
Special attention is required during Knife Gate Valve installation:
Installation Direction Confirmation: Ensure valve installation according to media flow direction
Pipeline Support Reinforcement: Heavy valves require additional support
Sealing Surface Protection: Prevent damage to sealing surfaces during installation
Alignment Accuracy Assurance: Ensure precise alignment between valve and pipeline
Operation Space Reservation: Guarantee sufficient maintenance and operation space
Bolt Torque Control: Use torque wrenches to tighten to specified values
Daily maintenance of Knife Gate Valves should focus on:
Regular Function Testing: Including sealing performance and cutting effectiveness inspection
Seal Condition Check: Regular inspection of seal wear condition
Gate Edge Maintenance: Maintain sharpness and integrity of gate edge
Operating Mechanism Lubrication: Regular lubrication of stem and transmission mechanism
Bolt Tightness Inspection: Regular check of connection bolt tightness
Common issues with Knife Gate Valves include:
Sealing Performance Degradation: Caused by seal wear or media corrosion
Increased Operating Torque: Due to media accumulation or component wear
Gate Sticking Phenomenon: Large particles jammed into sealing surfaces
Poor Cutting Effectiveness: Gate edge wear and blunting
External Leakage Issues: Packing wear or connection loosening
Our Knife Gate Valves support a complete certification system including CE, ISO 9001, API 6D, ABS (American Bureau of Shipping), BV (Bureau Veritas), CCS (China Classification Society), and specific industry certifications.