Bevel Gear Round Port Lug Bi-Directional Knife Gate Valve

Effortless, Secure Isolation for Large Pipelines

This heavy-duty knife gate valve is engineered to provide absolute isolation in demanding pipelines, particularly in large diameters (typically DN300 and above) where high operating torque is a factor. The integrated Bevel Gear Operator is the central feature, drastically reducing the manual effort required to cycle the valve.

Combining a reliable Bi-Directional sealing system with the easily serviceable Lug-style body, this valve ensures tight shut-off against pressure from any direction while simplifying pipeline maintenance and minimizing downtime. It is the perfect choice for large-scale, high-reliability manual isolation.

Key Features & Engineering Advantages

Feature Category	Technical Detail	Operational Benefit
Effort Optimization	Bevel Gear Operator	Significantly reduces the handwheel input torque needed to open or close the valve, making large-diameter or high-pressure isolation manageable for a single operator.
Sealing Security	Bi-Directional Sealing	Guarantees tight, zero-leakage isolation against the full-rated line pressure, regardless of the flow direction, enhancing process safety and flexibility.
Maintenance Ease	Lugged Connection Body	Features individually threaded bolt holes, allowing personnel to easily remove the valve from the pipeline by disassembling the flanges from one side only.
Flow Efficiency	Round Port Geometry	Provides a full, unobstructed bore when the valve is open, minimizing friction, wear, and pressure loss across the valve body.
Service Adaptability	Rising/Non-Rising Stem Options	Available in both rising stem (visual position indication) and non-rising stem (space-saving) configurations, often determined by the specific gear model.
Reliability	Bonnetless Design (Typically)	Simplifies the top-works structure, preventing media buildup above the gate and ensuring reliable cycling in slurry or particle-laden service.

Technical Specifications (Standard Bevel Gear Model)

Parameter	Specification Range
Actuation Method	Bevel Gear Operated (Manual)
Sealing Direction	Bi-Directional
Connection Type	Lug Type (Fully Tapped Holes)
Recommended Size	DN300 (12 Inch) and larger
Port / Flow	Round Port / Full Bore
Pressure Rating	PN10, PN16, or ANSI Class 150
Body Material Options	Ductile Iron, Carbon Steel (WCB), Stainless Steel (SS316)
Gate Material	Stainless Steel (SS304 / SS316)
Seating Material	Resilient (e.g., EPDM) for superior sealing, or Metal Seated for high temperature.

Target Applications

This valve is critical for manual isolation on large main lines in heavy industries where frequent, but strenuous, operation must be simplified:

Water Treatment & Municipal: Primary isolation on large distribution lines, backwash lines, and pump station manifolds.
Oil & Gas / Chemical Processing: Isolation on utility lines or large transfer lines requiring dual-directional sealing and high pressure capability.
Mining & Slurry: Key isolation points on large tailings or process water lines.

Future-Proof Design: The robust yoke and gear flange design are typically built to ISO standards, allowing for a straightforward upgrade to Electric or Pneumatic Actuators if automation is required in the future.