knife gate valve parts

knife gate valve parts Trade Information

Minimum Order Quantity
1 Piece

Supply Ability
500 Pieces Per Month

Delivery Time
7 Days

About knife gate valve parts

A knife gate valve is a linear-motion isolation valve featuring a thin, bevelled gate designed to cleanly cut through thick fluids, slurries, and solids.

Core Components and Descriptions

Body: The main external shell and pressure-retaining component that connects directly to the pipeline via wafer, lug, or flanged configurations. It houses all internal parts and provides a smooth bore for unrestricted media flow.
Gate (Blade): A thin, flat plate featuring a sharpened, knife-like edge at the bottom. It slides perpendicular to the fluid stream to physically shear through dense sediments, fibers, or slurry to isolate flow.
Seat: The internal sealing surface that the gate presses against when fully closed. Seats can be resilient (elastomers like NBR or polyurethane for zero-leakage) or metal-to-metal (for abrasive, high-temperature settings).
Stem (Spindle): A threaded rod connecting the actuator or handwheel to the gate. It rotates or lifts linearly to move the gate up and down. Stems are categorized as rising (moves up with the gate) or non-rising (remains vertically stationary).
Packing: A series of compressed, braided synthetic fibers (such as PTFE or graphite) placed inside the stuffing box. It forms a tight seal around the moving gate and stem to prevent process fluids from escaping into the environment.
Gland Follower: A rigid metal component bolted over the packing area. It applies uniform downward pressure on the packing material to maintain a secure seal over time.
Yoke (Topworks): A heavy-duty framework mounted directly on top of the valve body. It securely supports the stem nut and holds the actuation mechanism in perfect alignment with the valve body.
Actuator / Handwheel: The mechanism used to operate the valve. This can be a manual handwheel or gear, a pneumatic cylinder for fast automated cycles, a hydraulic cylinder for high-force applications, or an electric motor for remote digital control.

Summary of Structure

Part Name	Primary Material Options	Main Function
Body	Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel	Houses components, handles pipe stress.
Gate	Stainless Steel (304, 316, 316L), Exotic Alloys	Shears through media, blocks fluid path.
Seat	EPDM, NBR, Viton, PTFE, Stellite	Creates a leak-proof barrier with the gate.
Stem	Heavy-duty Stainless Steel	Translates mechanical torque into gate movement.
Packing	PTFE, Graphite, Cotton/Synthetic fiber	Prevents external leaks along the blade.

If you are evaluating options for a specific system, let me know what type of media you are handling (e.g., dry powder, thick slurry, or wastewater) and the operating pressure so I can detail the best matching part specifications.

AI can make mistakes, so double-check responses