Bevel Gear Round Port Lug Uni-Directional Knife Gate Valve

Low-Effort Isolation for Large, Consistent Flow Lines

This heavy-duty knife gate valve is meticulously designed for dependable on/off isolation in large-diameter industrial pipelines where flow is always from a consistent direction. By incorporating a Bevel Gear Operator, the valve dramatically reduces the manual effort (torque) needed for cycling, making it easily operable by a single person, even at high-pressure ratings or large sizes (typically DN300 and above).

The valve’s Uni-Directional sealing offers a secure, tight seal against forward flow, while the Lug-style body ensures efficient, single-sided maintenance, minimizing pipeline downtime. It is the cost-effective and robust solution for large-scale isolation needs.

Key Features & Engineering Advantages

Feature Category	Technical Detail	Operational Benefit
Effort Optimization	Bevel Gear Operator	Significantly reduces handwheel input torque by providing mechanical gear reduction, enabling smooth and safe manual operation of massive valves.
Maintenance Ease	Lugged Connection Body	Features individually threaded bolt holes, allowing maintenance personnel to remove the valve from the pipeline by disassembling the flanges from one side only.
Cost Efficiency	Uni-Directional Sealing	Provides guaranteed, tight isolation against forward flow while offering a simpler, more economical design compared to bi-directional models.
Flow Efficiency	Round Port Geometry	Ensures a full, unobstructed bore when open, minimizing pressure loss and reducing abrasive wear across the valve body.
Reliability	Rising or Non-Rising Stem Options	Available with a choice of stem styles to meet specific site requirements for position indication or vertical clearance.
Clogging Prevention	Bonnetless Design (Typically)	Simplifies the structure above the gate, preventing the accumulation of debris, pulp, or solids that often cause operational failure.

Technical Specifications (Standard Bevel Gear Model)

Parameter	Specification Range
Actuation Method	Bevel Gear Operated (Manual)
Sealing Direction	Uni-Directional (Flow Direction must be observed)
Connection Type	Lug Type (Fully Tapped Holes)
Recommended Sizes	DN300 (12 Inch) and larger
Port / Flow	Round Port / Full Bore
Pressure Rating	PN10, PN16, or ANSI Class 150
Body Material Options	Ductile Iron (GGG40/50), Carbon Steel, Stainless Steel
Gate Material	Stainless Steel (SS304 / SS316)
Seating Material	Resilient (e.g., EPDM, NBR) or Metal Seated

Target Industry Applications

This valve is critical for manual isolation on large main lines in heavy industries where flow is consistent and reduced operating effort is necessary:

Wastewater Treatment: Primary isolation on large distribution, drainage, or sewage lines with predictable flow.
Mining & Minerals: Isolation of process water, lower-concentration slurry lines, or large volume utility lines.
General Industrial: Large transfer lines for non-hazardous fluids where unidirectional flow is maintained.

Automation Ready: The robust yoke structure is built to ISO standards, simplifying future upgrades to Electric or Pneumatic Actuators if automation becomes necessary.