Cast Iron / Ductile Iron Through-Conduit Pneumatic Actuation Knife Gate Valve

Automated Isolation with Zero Pressure Loss

This high-specification knife gate valve is engineered for automated, high-frequency isolation duties where flow integrity and minimal pressure loss are critical. It combines the swift, high-thrust control of a Pneumatic Actuator with the superior protection of the Through-Conduit (Full Bore) body design.

When fully open, a smooth, continuous bore is created, which completely shields the valve seats and internal cavities from the flowing media. Constructed from cost-effective Cast Iron or high-strength Ductile Iron, this valve is the optimal choice for reliably automating non-corrosive fluid and gas lines where pipeline integrity is a top priority.

Key Features & Automated Flow Integrity

Feature Category	Technical Detail	Core Operational Benefit
Flow Protection	Through-Conduit (Full Bore) Design	Eliminates seat wear and minimizes pressure drop when open by providing a perfectly smooth, shielded flow path—protecting seats from erosion and simplifying pigging operations.
Automation & Speed	Pneumatic Cylinder Actuator	Provides rapid, reliable on/off cycling with high thrust, essential for automated batch sequencing, emergency shut-off, and remote control integration.
Cost & Strength	Cast Iron / Ductile Iron Body	Offers a cost-effective solution with excellent structural rigidity, commonly used for high pressure ratings in non-corrosive utility and process lines.
Sealing Security	Protected Seat Design	The valve seats are retracted and shielded by the conduit plate when the valve is open, drastically extending service life and reducing maintenance frequency.
Sealing Direction	Bi-Directional Capability	The conduit design often provides inherent capability for reliable, tight isolation against pressure from either side.
System Integration	Rising Stem Design (Typical)	Facilitates the easy mounting of limit switches and positioners onto the actuator yoke for accurate, real-time feedback to the control system.

Technical Specifications (Standard Pneumatic Through-Conduit Model)

Parameter	Specification Range
Flow Design	Through-Conduit / Full Bore
Actuation Method	Pneumatic Cylinder (Standard Double-Acting)
Body Material	Cast Iron (CI) or Ductile Iron (DI)
Connection Type	Flanged or Full Lug
Port / Flow	Round Port
Stem Design	Rising Stem (Typically)
Pressure Rating	PN10, PN16, or ANSI Class 150/300
Sealing Type	Metal Seated or Composite Seats (Protected by conduit)
Service Media	Water, oil, gas, viscous liquids, and non-corrosive slurries.

Target Industry Applications

This automated valve is essential for critical pipelines requiring flow integrity and rapid isolation:

Oil & Gas / Pipeline: Automated isolation of crude oil, natural gas, and refined products where pigging capability and zero-leakage isolation are mandatory.
Water Treatment: Isolation of clean water distribution and non-corrosive utility lines.
Industrial Utilities: Automated control of high-pressure utility lines (air, water, non-hazardous process fluids).

Integration Package: The pneumatic actuator is supplied with ISO mounting standards, ready for immediate automation. We offer complete accessory packages, including Solenoid Valves, Positioners, and Limit Switch Boxes, for seamless integration with your DCS/PLC system.