Specification
DIN/ASME/API DN100 Electric Knife Gate Valve with WCB Wafer Flange for Water Control in Gas Media Applications
I. Product Overview
NEWWAY DN100 (4in) electric knife gate valve with WCB wafer flange is a specialized industrial valve engineered for reliable shutoff and flow control in media containing solids, dust, or particles—an area where traditional gate valves often clog or fail. Featuring a knife-like gate (阀芯) and wafer-style flange connection, this valve combines the structural strength of WCB (cast carbon steel) with electric actuation, enabling automated, low-maintenance operation across medium-pressure systems.
Designed to handle diverse media including water, gas, dry dust, and small solid particles (≤3mm), the valve operates within a pressure range of PN16 (1.6MPa) and temperature range of -20℃ to +150℃—making it suitable for harsh industrial environments where manual valve operation is inefficient or unsafe. Compliant with global standards such as ASME B16.34, API 600, and GB/T 12234, it integrates seamlessly into municipal, mining, chemical, and power sector pipelines, delivering consistent performance in both on-off and basic throttling applications.
II. Key Attributes and Specification Parameters
Basic Attributes
Structure Design: Knife gate valve with a linear-acting gate (knife-shaped edge) and wafer flange connection. The gate moves vertically via electric actuation to open/close the flow path; its sharp edge shears through media containing fibers, dust, or small particles to prevent clogging.
Body Material: WCB cast carbon steel (ASTM A216), selected for high mechanical strength (tensile strength ≥485MPa) and cost-effectiveness. WCB resists mild corrosion from water and gas, and withstands temperatures up to 150℃ without deformation—ideal for non-corrosive, medium-pressure industrial scenarios.
Internal Component Materials:
Gate Valve core: 1.4529 (super austenitic stainless steel) or Wear-resistant alloy steel, featuring a precision-ground knife edge for shear capability and resistance to abrasion from particles.
Stem: SS304 stainless steel, preventing rust and ensuring smooth vertical movement; paired with a graphite packing gland to eliminate stem leakage.
Seal Material: PTFE (polytetrafluoroethylene) soft seal for low-temperature, clean media (water, gas), or metal hard seal (SS304) for high-temperature, abrasive media (dust, particles)—both achieving tight shutoff to minimize media loss.
Pressure Rating: PN16 (1.6MPa), suitable for medium-pressure pipelines in municipal water supply, gas distribution, and industrial process systems.
Temperature Range: -20℃ to +150℃ (PTFE seal) / -20℃ to +200℃ (metal seal), accommodating normal-temperature water, heated gas, and low-temperature dust-laden air.
Nominal Diameter Range: 2in to 24in (DN50 to DN600), with a focus on DN100 (4in) for balanced flow rates—suitable for both small-batch process lines (e.g., chemical dosing) and large-scale transfer pipelines (e.g., mining slurry).
Connection Type: Wafer flange (ANSI/ASME B16.5 Class 150, DIN EN 1092-1 PN16), a compact design that clamps between two pipeline flanges without requiring its own bolt holes. This reduces valve weight by 30% compared to full-flange models and saves installation space.
Actuation System: Electric actuator with linear drive, offering:
Voltage Compatibility: AC 220V, AC 110V, DC 24V (±10% fluctuation tolerance), Adapt to global power systems.
Control Modes: On-off control (for basic shutoff) and proportional control (via DC 4-20mA signal or Modbus RTU communication), enabling precise flow adjustment with ±0.8% control precision.
Protection Ratings: IP65 (dust-tight, water-resistant) as standard; optional IP67 for damp environments (e.g., wastewater plants) or explosion-proof (EXD IIB T4) for hazardous gas zones.
Emergency Function: Manual override handle (mechanical) for operation during power failure, ensuring system continuity.
Media Compatibility: Clean water, raw water, natural gas, biogas, dry dust (e.g., cement powder, coal dust), and fluids containing small solid particles (e.g., mining slurry, sewage sludge)—excluding highly corrosive media (e.g., strong acids).
Design and Testing Standards:
Design: ASME B16.34 (valves for flanged/threaded/welding ends), API 600 (steel gate valves), GB/T 12234 (flanged knife gate valves).
Testing: API 598 (shell and seat leakage testing), IEC 60529 (IP rating testing), ensuring structural integrity and sealing performance.
Warranty: 1 year (covers valve body and actuator defects under normal operation).