Knife Gate Valves 

The Fabri-Valve Figure C67 provides bubble-tight, bi-directional shutoff with its patented perimeter seal. The seal is retained in the valve body by its trapezoidal shape. A relief has been cast into the valve body. The relief greatly reduces seal compression set; the shape of the seal eliminates leakage due to seat rollover, and seat pullout.



The Fabri-Valve Figure C67 features a unique, patented*, perimeter seat that provides bi-directional, bubble-tight shutoff. The seat is retained in the valve body by its trapezoidal shape. A relief area has been cast into the valve body behind the seat. Designed to overcome problems common to other perimeter seated designs, the relief area greatly reduces compression set of the seat, allowing it to maintain a tight shutoff performance over varying service conditions. This unique valve design is available in cast stainless steel and carbon steel body construction and can be supplied with a wide variety of seat materials to address a range of application parameters. The C67 has been upgraded with the universal yoke design which provides greater range of valve application. The yoke plates include a lockout provision for both manual and actuated valves, while greatly simplifying the conversion of valve operators in the field. The yoke plates also allow for easier mounting of mechanical and proximity sensors.

Trapezoidal Seat Technology

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The C67 trapezoidal seat design provides bubble tight shutoff across the full pressure rating of the valve.


When the gate is opened, the seat remains flush with the valve body, reducing turbulence and media build-up.


As the gate is closed, the resilient seat is pushed into the body relief area, reducing compression set of the rubber and maintaining a long-term, tight seal.


The trapezoidal shape also eliminates issues from seat rollover and  prevents seat pullout due to fluid velocity.




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​Size Range
2” – 36”

Pressure Rating
2”-24” 150 psi 
30” 100 psi
36” 80 psi 

Temperature Rating
EPDM Seat -50°F to 280°F 
Viton Seat -30°F to 350°F 

Flange Drilling
ANSI 125/150 Drilling