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GEFA Knife Gate Valves
GEFA Processtechnik GmbH Dortmund is a special manufacturer in the range of industrial valves and fittings, filtration technology as well as measuring and control technology. The enterprise was founded in 1964 as one of the first to manufacture three-piece ball valves, centric soft-seated and pneumatic piston actuators. In the field of filtration technology GEFA launched an innovative product range on the German market.
Since 1992 the company is certified according to EN ISO 9001 and offers products of superior reliability and safety. We also offer a product range for specific applications. Our large-scale storage system guarantees short delivery times.
Type AT 100 Description
Knife gate valve for installation between flanges acc. EN 1092-1, with self cleaning plate guidance and flash-out-corners, self adjusting COMPACT-Cross-seal towards the atmosphere, hermetically sealed in both flow-directions, two-piece body, metallic and jitter-free guided knife plate, cutting edge on the lower body surface.
Nominal width: DN 50 – DN 200 DN 50 - DN 150: PN 10/16 DN 200: PN 10
Two-piece body Two asymmetrical halfs of the body with integrated cutting Knife
Temperature range -30 °C - +200 °C depending on the seal material
Legth: EN 558 - 1 line 20 DIN 3202 - K1
Max. operating pressure: DN 50 – 150: 10 bar DN 200: 6 bar
Dimensional drawing as PDF
Dimensional drawing as PDF
Dimensional drawing as PDF
Installation guide gasket as PDF
AT 150 Description
Knife gate valve for installation between flanges as per DIN EN 1092-1,with self cleaning plate guidance and rinse edges, self adjusting COMPACT-Cross-seal towards the atmosphere, hermetically sealed in both flow-directions, two-piece body, metallic and jitter-free guided knife plate, cutting edge on the lower body surface.
Nominal width: DN 50 – DN 300 DN 50 – DN 150: PN 10/16 from DN 200: PN 10
Two-piece body: Two asymmetrical halfs of the body with integrated cutting Knife
Temperature range: -30 °C - +200 °C depending on the seal material
Legth: EN 558 - 1 line 20 DIN 3202 - K1
Max. operating pressue: till DN 150: 10 bar DN 200 – DN 300: 6 bar
Dimensional Drawing as PDF
Dimensional Drawing as PDF
Dimensional Drawing as PDF
Dimensional Drawing as PDF
Installation guide gasket as PDF
AT 200 F Description
Knife gate valve for installation between flanges as per DIN EN 1092-1 and useable as end-valve, self adjusting COMPACT-Cross-seal towards the atmosphere, scraper to clean the knife gate positioned in front of it, hermetically sealed in both flow-directions, two-piece body, metallic and jitter-free guided knife plate with segment-formed radius, sharpened cutting edge on the lower body surface.
Nominal width: DN 200 – DN 1000 DIN EN 1092-1, PN 10
Two-piece body: Two seperate halfs of the body Front-body with regulating disc Rear-body with disc-bed
Temperature range: -30 °C - +200 °C depending on the seal material
Legth: EN 558 - 1 line 20 DIN 3202 - K1
Pressure impact strength: DN 200 – DN 600: till 18 bar from DN 700: till 6 bar
Resistance to ignition transmission: DN 200 – DN 500: till 3,4 bar DN 600: till 4,5 bar from DN 700: till 6 bar
Dimensional Drawing as PDF
Dimensional Drawing as PDF
Dimensional Drawing as PDF
Dimensional Drawing as PDF
Dimensional Drawing as PDF
Dimensional Drawing as PDF
Dimensional Drawing as PDF
Dimensional Drawing as PDF
Dimensional Drawing as PDF
AT 400 Description
Knife gate valve with full and free passage, pigging also possible with calibre-tool, for installation between flanges acc. to DIN EN 1092-1 and useable as end valve, with self adjusting COMPACT-Cross-seal towards the atmosphere, hermetically sealed in both flow-directions, two-piece body, metallic and jitter-free guided knife plate, cutting edge on the lower body surface.
Nominal width DN 50 – DN 1200
Two-piece body Two asymmetrical halfs of the body with integrated cutting Knife
Temperature range -30 °C - +200 °C depending on the seal material
Legth: EN 558 - 1 line 20 DIN 3202 - K1
Max. operating pressure PN 10: 10 bar PN 16: 16 bar
No Datasheet avaliable!
AT 200 R Description
Knife gate valve with special regulating disc to achieve a linear control characteristic, for installation between flanges as per DIN EN 1092-1 and useable as end-valve, with self adjusting COMPACT-Cross-seal towards the atmosphere, hermetically sealed in both flow-directions, two-piece body, metallic and jitter-free guided knife plate with segment-formed radius, cutting edge on the lower body surface.
Nominal width: DN 50 – DN 1200 DN 50 – DN 150 : PN 10/16 from DN 200 : PN 10
Two-piece body: Two seperate halfs of the body Front-body with regulating disc Rear-body with disc-bed
Temperature range: -30 °C - +200 °C depending on the seal material
Legth: EN 558 - 1 line 20 DIN 3202 - K1
Dimensional Drawing as PDF
Dimensional Drawing as PDF
Dimensional Drawing as PDF
Installation guide gasket as PDF
CA Description
Gate valve for installation between flanges PN 10, one-piece body with raised face, one sided tightening.
Nominal width: DN 50 – DN 1800
Temperature range: up to +540 °C in dependence on the sealing element
Max. operating pressure: DN 50 – 125: 10 bar DN 250 – 300: 6 bar DN 350 – 400: 5 bar DN 450 – 600: 3 bar DN 700 – 1200: 2 bar
Dimensional drawing as PDF
Dimensional drawing as PDF
Dimensional drawing as PDF
CC Description
Application: Gate valve for installation between flanges according to customer's specification or manufacturer's specification, As dead-end valve under silos or augers applicable. One-piece frame, one sided sealing.
Nominal width: DN 50 – DN 1200
Temperature range: Dimensions according to requirements, Standard Dimensions see data sheet One-piece welded frame, one sided sealing
Max. operating pressure: -30 °C bis +500 °C in dependence on the sealing element
Max. operating pressure: 0,6 bar
Dimensional Drawing
Operating Manual
AT 200 Description
Knife gate valve for installation betweeen flanges acc. DIN EN 1092-1 and useable as end-valve,with self cleaning plate guidance and flash-out-corners, self adjusting COMPACT- Cross-seal towards the atmosphere, hermetically sealed in both flow-directions, two-piece body, metallic and jitter-free guided knife plate with segment-formed radius, cutting edge on the lower body surface.
Nominal width DN 50 – DN 1200 DN 50 - DN 150: PN 10/16 from DN 200: PN 10
Two-piece body Two asymmetrical halfs of the body with integrated cutting knife
Temperature range -30 °C - +200 °C depending on the seal material
Legth: EN 558 - 1 line 20 DIN 3202 - K1
Max. operting pressures
DN 50 – DN 300: 10 bar
DN 350 – DN 400: 6 bar
DN 450 – DN 800: 4 bar
DN 900: 3 bar
DN 1000: 2,5 bar
DN 1200: 2 bar
Dimensional drawing
Dimensional drawing
Dimensional drawing
Dimensional drawing
Dimensional drawing
Dimensional drawing
Installation guide gasket as PDF
CL Description
Knife gate valve for installation between flanges PN10, two-piece body, Body with non-stop gate, both sided sealing.
Nominal width: DN 50 – DN 1200 DN 50 - DN 1200: PN 10, ANSI 150
Two-piece body: both sided sealing
Temperature range: -30 °C bis +500 °C depending on the seal material
Max. operting pressures
DN 50 – DN 300: 10 bar:
DN 50 – 125: 10 bar
DN 250 – 300: 6 bar
DN 350 – 400: 5 bar
DN 450 – 600: 3 bar
DN 700 – 1200: 2 bar
CD Description
Application: Knife gate valve – High pressure gate valve Typ CD, Knife gate valve for installation betweeen flanges acc. DIN or ANSI, pressure-encapsulated body with raised sealing for secure seat and knife guidance and free opening cross section. Sandwich design in short overall length.
Nominal width: DN 50 – DN 1200 DN 50 – DN 600 PN 6 – PN 100 DN 700 – DN 800 PN 6 – PN 40 DN 900 – DN 1000 PN 6 – PN 16
Temperature range: -30 °C bis +500 °C depending on the seal material
Max. operting pressures: accordingly PN
CXC Description
Application: Solids gate valve CXC Solids gate valve for installation betweeen flanges acc. DIN or ANSI, As dead-end valve under silos or augers applicable., One-piece body with funnel-shaped outlet to prevent product sediments in the body, incl. 2 flushing connections.
Nominal width: DN 50 – DN 1200 PN 10, ANSI 150
One piece body: one sided sealing
Temperature range: bis +540 °C depending on the seal material
Max. operting pressures: DN 50 – DN 125: 3 bar DN 150 – : 2,5 bar DN 200 – : 2 bar DN 250 – DN 300: 1,5 bar DN 350 – DN 400: 1,3 bar DN 450 – DN 600: 1 bar DN 700 – DN 1200: 0,75 bar