Rubber Lined Flange Type Knife Gate Valve

Technical Specifications

Chief Features

Channel without cavity,will not accumulate solids.

Channel and Flange RF surface is rubber lined,wearable.

Bi-directional seal.

No metal Parts in contact with the flowing media when the valve is in the full open position.

Field replaceable heavy duty elastomer sleeve.

The top bracket accept manual,pneumatic or electric for easy conversion.

Yoke design which consists of two plates that fully encloses the gate, spindle and Splatter that protects these components from slurry splatter that can harden and affect the operation of the valve.

Key Advantages

Reduced Downtime with Field-Replaceable Lining
The elastomer sleeve can be replaced on-site without swapping out the entire valve, cutting maintenance time and long-term costs compared to valves with fixed, non-serviceable linings.

Reliable Sealing in Either Flow Direction
The bi-directional design with twin elastomer sleeves means the valve doesn't need to be installed with a specific flow orientation, reducing installation errors and giving more flexibility in piping layout.

No Solids Buildup, Fewer Blockages
The cavity-free channel design prevents solids from accumulating inside the valve — important for slurry and abrasive media applications where clogging is a common failure point.

Longer Service Life in Abrasive & Corrosive Media
The rubber-lined channel and flange RF surface protects against wear and corrosion, extending valve life in demanding applications like mining, cement, and chemical processing compared to unlined metal-seated valves.

FAQs

Q1: What is a rubber lined flange type knife gate valve used for?
It's designed for slurry and abrasive media handling in industries such as power, mining, pulp & paper, cement, carbon black, and chemical processing, where solids can accumulate or wear down standard valve seats.

Q2: Why choose a bi-directional design over a uni-directional one?
Because it uses twin elastomer sleeves instead of a single seat, it seals reliably regardless of which direction flow is coming from — useful in piping layouts where flow direction may change or isn't fixed at installation.

Q3: How does the rubber lining help with abrasive or corrosive slurries?
The rubber lining acts as a barrier between the media and the metal body, reducing wear from solids and protecting against corrosive attack — which is why the valve holds up in applications like mining and chemical processing where standard metal-seated valves wear out faster.

Q4: Is the rubber lining replaceable, or does the whole valve need to be replaced when it wears out?
It's field replaceable — the elastomer sleeve can be serviced on-site without swapping out the entire valve, which lowers long-term maintenance cost compared to a fixed-lining design.

Q5: Can this valve be automated, or is it manual only?
It supports handwheel, worm gear, electric, or pneumatic operation, so it can fit into both manually operated lines and automated control systems.

Q6: What if the standard configuration doesn't match our application?
Special-made configurations are available if the rubber lined knife gate valve doesn't meet a specific application's requirements.