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Plattenschieber-Stoffschieber

Knife gate valve - Slide Valve

The knife gate valve, also known as a slide gate valve, is one of the most important components in industrial pipeline construction. It plays an essential role in regulating the flow of liquids, suspensions or other media by raising or lowering a plate, the so-called “gate valve”. Thanks to its slim design, the knife gate valve takes up very little space on the pipe, making it ideal for tight installation situations.

A particularly great advantage of this shut-off device is that an almost unimpeded flow is guaranteed when the gate valve is fully open, allowing the medium to flow with only minimal flow losses. The gate valve surfaces are usually wedge-shaped to ensure a perfect seal. Or they are also equipped with parallel wedges, which is useful when abrasive or fibrous media are used.

Knife gate valves can be found in a wide range of industries, from the paper and pulp industry to wastewater technology, the chemical and food industries and even mining. Thanks to their robust design and the possibility of using various sealing materials, they are a genuine and versatile choice. They are also available as manual, pneumatic or electrically operated shut-off devices, depending on their purpose, which means that they can be perfectly integrated into automated processes.

Knife gate valve: stainless steel and grey cast iron

The knife gate valve is a versatile valve for industrial applications. Made from robust materials such as stainless steel and grey cast iron, the knife gate valve has a slide mechanism housed in a robust body. The slide gate valve can be operated manually with a handwheel or automatically with pneumatic or electric actuators, including quick-closing options. The slide-gate valve can be sealed on one or both sides with metal, NBR and EPDM seals. Fergo offers the gate valve with integrated wiper, PTFE-Synt./NBR/PTFE-Synt. and PTFE-Synt./EPDM/PTFE-Synt. seals. They are essential in industries such as the chemical industry, waste water treatment and food production to optimise efficiency and maintain system integrity. Easy to install and highly customisable, gate valves are the best solution for many piping designs.
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Plattenschieber Stoffschieber pneumatisch
FM200 Knife-gate valve DN 100 EPDM cast iron double-acting Pneumatic actuator Product number: 270-1008-12
Wafer-type knife gate valve/flat knife gate valve DN 100 PN10, single-seated design, seat ring made of EPDM, body made of grey cast iron (GG25), knife gate valve plate made of stainless steel SS304L (1.4306), stem made of stainless steel SS303 (1.4305) with pneumatic double-acting actuator
Design :
sealing on one side
Actuation :
Pneumatic Actuator
Nominal width :
DN100 - 4'' inch
Body:
Grey Cast Iron

€424.50*

€505.16 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Schnellschluß Schieber
FM200 Knife-gate valve DN 150 NBR Cast iron Stainless steel Quick-action closing lever Product number: 270-1067-14
Wafer-type gate valve/flat slide valve DN 150 connection PN10, single-seated design, seat ring made of NBR, body made of grey cast iron (GG25), gate valve plate made of stainless steel SS304L (1.4306), stem made of stainless steel SS303 (1.4305), quick-closing lever steel painted
Actuation :
Quick Release Lever
Design :
sealing on one side
Body:
Grey Cast Iron
Nominal width :
DN150 - 6'' inch

€477.50*

€568.22 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Plattenschieber Stoffschieber pneumatisch
FB700 Knife-gate valve DN 150 PN10 NBR cast iron double-acting pneumatic actuator Product number: 270-3011-14
Wafer type knife gate valve DN 150 PN10Design double seated, seat ring U-bolt seal NBR with profile steel core reinforcement, body made of grey cast iron (GG25), gate plate & stem made of stainless steel, plate guide with integrated scraping effect, packing PTFE-Synt./NBR/PTFE-Synt. with pneumatic double acting
Design :
sealing on both sides
Actuation :
Pneumatic Actuator
Body:
Grey Cast Iron
Nominal width :
DN150 - 6'' inch

€637.00*

€758.03 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Plattenschieber Stoffschieber pneumatisch
FM200 Knife-gate valve DN 150 EPDM Cast iron double-acting pneumatic actuator Product number: 270-1008-14
Wafer type knife gate valve/flat knife gate valve DN 150 PN10Single-seated design, seat ring made of EPDM, body made of grey cast iron (GG25), gate valve plate made of stainless steel SS304L (1.4306), stem made of stainless steel SS303 (1.4305) with pneumatic double-acting actuator
Design :
sealing on one side
Nominal width :
DN150 - 6'' inch
Body:
Grey Cast Iron
Actuation :
Pneumatic Actuator

€590.50*

€702.69 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Plattenschieber Stoffschieber pneumatisch
FB700 Knife-gate valve DN 100 NBR cast iron double-acting pneumatic actuator Product number: 270-3011-12
Knife gate valve DN 100 PN10 pneumaticDouble poppet design, seat ring U-bolt seal NBR with profile steel core reinforcement, body made of grey cast iron (GG25), gate plate & stem made of stainless steel, plate guide with integrated scraping effect, packing PTFE-Synt./NBR/PTFE-Synt. with pneumatic double-acting
Design :
sealing on both sides
Actuation :
Pneumatic Actuator
Nominal width :
DN100 - 4'' inch
Body:
Grey Cast Iron

€470.50*

€559.90 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Stoffschieber Plattenschieber Handrad
FM200 Knife-gate valve DN 150 NBR Cast iron Handwheel with rising stem Product number: 270-1001-14
Knife gate valve DN 150 PN10Single-seated design, seat ring made of NBR, body made of grey cast iron (GG25), gate valve plate made of stainless steel SS304L (1.4306), stem made of stainless steel SS303 (1.4305), actuation handwheel with rising stem
Design :
sealing on one side
Body:
Grey Cast Iron
Nominal width :
DN150 - 6'' inch
Actuation :
Handwheel (rising stem)

€375.50*

€446.84 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Plattenschieber Stoffschieber Handrad
FB700 Knife-gate valve DN 100 EPDM cast iron handwheel with rising stem Product number: 270-3000-12
Knife gate valve DN 100 PN10Double poppet design, seat ring made of EPDM with profile steel core reinforcement, body made of grey cast iron (GG25), gate plate & stem made of stainless steel, plate guide with integrated scraping effect, packing PTFE-Synt./EPDM/PTFE-Synt, operation handwheel with rising stem
Nominal width :
DN100 - 4'' inch
Body:
Grey Cast Iron
Actuation :
Handwheel (rising stem)
Design :
sealing on both sides

€333.50*

€396.86 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Plattenschieber Stoffschieber Handrad
FB700 Knife-gate valve DN 150 EPDM cast iron handwheel with rising stem Product number: 270-3000-14
Sandwich knife gate valve - knife gate valve DN 150 PN10Design bi-directional, seat ring made of EPDM with profile steel core reinforcement, body made of grey cast iron (GG25), gate plate & stem made of stainless steel, plate guide with integrated scraping effect, packing PTFE-Synt./EPDM/PTFE-Synt, operation handwheel with rising stem 
Actuation :
Handwheel (rising stem)
Nominal width :
DN150 - 6'' inch
Body:
Grey Cast Iron
Design :
sealing on both sides

€433.50*

€515.86 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Stoffschieber Plattenschieber Handrad
FM200 Knife-gate valve DN 100 Metal cast iron Handwheel with rising stem Product number: 270-1002-12
Wafer-type knife gate valve/flat knife gate valve DN 100 PN10single-seated design, seat ring made of metal, body made of grey cast iron (GG25), gate plate made of stainless steel SS304L (1.4306), stem made of stainless steel SS303 (1.4305), actuation handwheel with rising stem
Actuation :
Handwheel (rising stem)
Body:
Grey Cast Iron
Nominal width :
DN100 - 4'' inch
Design :
sealing on one side

€264.00*

€314.16 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Plattenschieber Stoffschieber Handrad
FB700 Knife-gate valve DN 250 NBR Cast iron GG25 Handwheel Product number: 270-3131-18
Flanged knife gate valve DN 250 PN10Design bi-directional, seat ring made of NBR with profile steel core reinforcement, body made of grey cast iron (GG25), gate plate & stem made of stainless steel, handwheel with non-rising stem
Body:
Grey Cast Iron
Actuation :
Handwheel (non-rising)
Nominal width :
DN250 - 10'' inch
Design :
sealing on both sides

€1,018.00*

€1,211.42 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Stoffschieber Plattenschieber Handrad
FM200 Knife gate valve DN 150 Handwheel with rising stem Product number: 270-1002-14
Wafer type knife gate valve DN 150 PN10Single-seated design, seat ring made of metal, body made of grey cast iron (GG25), gate plate made of stainless steel SS304L (1.4306), stem made of stainless steel SS303 (1.4305), actuation handwheel with rising stem
Body:
Grey Cast Iron
Nominal width :
DN150 - 6'' inch
Actuation :
Handwheel (rising stem)
Design :
sealing on one side

€348.00*

€414.12 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Stoffschieber-Plattenschieber-Flachschieber Gehäuse aus Sphäroguss mit pneuamtischem doppeltwirkend Antrieb
FB700 Knife-gate valve DN 200 EPDM cast iron double-acting pneumatic actuator Product number: 270-3010-16
Wafer Gate Valve DN 200 PN10Design bi-directional, seat ring U-bolt seal NBR with profile steel core reinforcement, body made of grey cast iron (GG25), gate plate & stem made of stainless steel, plate guide with integrated scraping effect, packing PTFE-Synt./NBR/PTFE-Synt. - double acting pneumatic actuator
Design :
sealing on both sides
Actuation :
Pneumatic Actuator
Body:
Grey Cast Iron
Nominal width :
DN200 - 8'' inch

€945.50*

€1,125.14 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

FM200-Stoffschieber-Plattenschieber-Flachschieber-DN50-DN600-PN10-GG25-Grauguss-NBR-doppeltwirkend-Antrieb
FM200 Knife-gate valve DN 150 NBR cast iron double-acting pneumatic actuator Product number: 270-1011-14
Wafer type knife gate valve/flat knife gate valve DN 150 PN10Single-seated design, seat ring made of NBR, body made of grey cast iron (GG25), gate made of stainless steel SS304L (1.4306), stem made of stainless steel SS303 (1.4305) with pneumatic double acting
Nominal width :
DN150 - 6'' inch
Design :
sealing on one side
Actuation :
Pneumatic Actuator
Body:
Grey Cast Iron

€590.50*

€702.69 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Plattenschieber Stoffschieber pneumatisch
FM200 Knife-gate valve DN 200 EPDM cast iron double-acting pneumatic actuator Product number: 270-1008-16
Knife Gate Valve DN 200 PN10Design single-seated, seat ring made of EPDM, body made of grey cast iron (GG25), gate made of stainless steel SS304L (1.4306), stem made of stainless steel SS303 (1.4305) with pneumatic double-acting actuator
Actuation :
Pneumatic Actuator
Body:
Grey Cast Iron
Nominal width :
DN200 - 8'' inch
Design :
sealing on one side

€856.00*

€1,018.64 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Plattenschieber Stoffschieber Handrad
FB700 Knife-gate valve DN 200 EPDM Cast iron GG25 Handwheel with rising stem Product number: 270-3000-16
Wafer type gate valve DN 200 PN10Double sealing design, seat ring made of EPDM with profile steel core reinforcement, body made of grey cast iron (GG25), gate plate & stem made of stainless steel, plate guide with integrated scraping effect, packing PTFE-Synt./EPDM/PTFE-Synt, operation handwheel with rising stem
Design :
sealing on both sides
Body:
Grey Cast Iron
Actuation :
Handwheel (rising stem)
Nominal width :
DN200 - 8'' inch

€597.50*

€711.02 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Plattenschieber Stoffschieber
FB700 Knife-gate valve DN 150 NBR Cast iron GG25 Handwheel with rising stem Product number: 270-3001-14
Wafer type gate valve DN 150 PN10Double sealing design, seat ring made of NBR with profile steel core reinforcement, body made of grey cast iron (GG25), gate plate & stem made of stainless steel, plate guide with integrated scraping effect, packing PTFE-Synt./NBR/PTFE-Synt, operation handwheel with rising stem
Body:
Grey Cast Iron
Actuation :
Handwheel (rising stem)
Nominal width :
DN150 - 6'' inch
Design :
sealing on both sides

€433.50*

€515.86 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Schnellschluß Schieber
FM200 Knife-gate valve DN 100 NBR Cast iron Quick-action closing lever Product number: 270-1067-12
Knife gate valve DN 100 - Quick closing gate valvePN10 connection, single-seated design, seat ring made of NBR, body made of grey cast iron (GG25), gate valve plate made of stainless steel SS304L (1.4306), stem made of stainless steel SS303 (1.4305), quick-closing lever made of painted steel
Actuation :
Quick Release Lever
Design :
sealing on one side
Nominal width :
DN100 - 4'' inch
Body:
Grey Cast Iron

€373.50*

€444.46 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

FM200-Stoffschieber-Plattenschieber-Flachschieber-DN50-DN600-PN10-GG25-Grauguss-NBR-doppeltwirkend-Antrieb
FM200 Knife-gate valve DN 100 NBR cast iron double-acting pneumatic actuator Product number: 270-1011-12
Wafer type gate valve DN 100 PN10 with actuatorDesign single-seated, seat ring made of NBR, body made of grey cast iron (GG25), gate valve plate made of stainless steel SS304L (1.4306), stem made of stainless steel SS303 (1.4305) with pneumatic double-acting
Body:
Grey Cast Iron
Actuation :
Pneumatic Actuator
Design :
sealing on one side
Nominal width :
DN100 - 4'' inch

€424.50*

€505.16 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Plattenschieber Stoffschieber pneumatisch
FB700 Knife-gate valve DN 200 NBR cast iron double-acting pneumatic actuator Product number: 270-3011-16
Wafer type knife gate valve DN 200 PN10Design bi-directional, seat ring U-bolt seal NBR with profile steel core reinforcement, body made of grey cast iron (GG25), gate plate & stem made of stainless steel, plate guide with integrated scraping effect, packing PTFE-Synt./NBR/PTFE-Synt. with pneumatic double-acting
Design :
sealing on both sides
Actuation :
Pneumatic Actuator
Body:
Grey Cast Iron
Nominal width :
DN200 - 8'' inch

€945.50*

€1,125.14 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Plattenschieber aus Grauguss(GG25) mit Handrad. Günstig and Hochwertig Stoffschieber von FERGO. Viele auswahl and auf Lager
FM200 Knife-gate valve DN 150 EPDM Cast iron Handwheel with rising stem Product number: 270-1000-14
Knife gate valve DN 150 PN10Single-seated design, seat ring made of EPDM, body made of grey cast iron (GG25), gate made of stainless steel SS304L (1.4306), stem made of stainless steel SS303 (1.4305), packing: PTFE-Synt./EPDM/PTFE-Synt, operation handwheel with rising stem
Design :
sealing on one side
Body:
Grey Cast Iron
Nominal width :
DN150 - 6'' inch
Actuation :
Handwheel (rising stem)

€375.50*

€446.84 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Sliding gate valves: Robust solutions for demanding applications

Knife gate valves, also known as knife gate valves, are robust and versatile shut-off valves that are used in many branches of industry. The choice of material, be it stainless steel or grey cast iron, depends on the specific requirements of your system and the media to be conveyed. Due to their high resistance and flexibility, knife gate valves are particularly suitable for fibre-bearing media, slurries, granulates, pastes and even for applications with a high degree of contamination.

A key advantage of slide valves is their flexibility. Various seals such as NBR, EPDM or metallic variants provide a reliable seal, even under difficult conditions. In addition, integrated wipers ensure that the valve plate remains clean, which significantly reduces maintenance work. For even higher resistance requirements, special seal designs such as PTFE-Synt./NBR/PTFE-Synt. or PTFE-Synt./EPDM/PTFE-Synt. are available.

Slide valves also impress with their variety of actuation types. A handwheel (rising or non-rising) enables simple manual control. Pneumatic double-acting actuators or electric AUMA actuators are ideal for automated processes. Solenoid valves ensure precise control, while the entire system benefits from a robust construction designed for durability and efficiency.

Thanks to their versatile properties, knife-gate valves are indispensable in areas such as the chemical industry, wastewater treatment and food production in order to increase efficiency and ensure the integrity of systems. In the chemical industry, for example, they are used to handle aggressive media, while in wastewater treatment they reliably control sludge and fibrous materials. In food production, they ensure hygienic processing of pastes and other viscous substances. Knife-gate valves therefore play a central role in various processes and make a decisive contribution to the smooth running of industrial applications.


FAQ about the knife gate valve


A knife gate valve is a valve designed to cut through thick liquids and slurries. It has a sharp, bevelled edge (similar to a knife) on its blade, which enables it to efficiently cut through media with a high viscosity or high solids content.
A knife gate valve works by raising or lowering a gate (the gate plate) to start or stop the flow of fluid. When the gate is raised, fluid flows through the valve. When the gate is lowered, the flow is blocked. The sharp edge of the gate valve helps to cut through deposits or blockages in the pipework.
The most important components of a knife gate valve include 
  • Body: The main structure that houses the gate valve and the flow channel.
  • Gate valve: The moving part that opens and closes to control the flow.
  • Seat: Provides a sealing surface for the gate to ensure a tight seal.
  • Stem: Connects the gate valve to the actuator (manual or automatic).
  • Actuator: Mechanism for moving the gate valve, which can be manual (handwheel), pneumatic, hydraulic or electric.
Knife gate valves are often used in industries where slurries, viscous liquids and bulk materials are processed, such as 
  • Mining Pulp and paper 
  • Waste water treatment 
  • Food and beverage industry 
  • Chemical processing 
  • Bulk solids technology
  • Biogas plants & more
  • Effective for handling slurries and solids: The knife edge can cut through thick media without clogging.
  • Low cost and simple design: These valves are generally less expensive and simpler in design than other valve types.
  • Minimised pressure drop: When the valve is fully open, it provides a straight flow path with low resistance.
  • Easy maintenance: The simple design facilitates disassembly and repair.
  • Not suitable for high-pressure applications: They are generally not suitable for high-pressure applications.
  • Limited to on/off operation: Knife gate valves are not ideal for throttling or regulating the flow.
  • Sealing problems: They cannot close tightly under all conditions, especially in high-pressure or vacuum applications.
Tips for the maintenance of knife gate valves:
  • Regular inspection: check regularly for wear, especially on the gate valve and seat.
  • Lubrication: Ensure that the spindle and other moving parts are properly lubricated to prevent corrosion and ensure smooth operation.
  • Cleaning: Remove all debris and dirt from around the gate and seat to prevent clogging and ensure a good seal.
  • Replacing worn parts: Replace worn or damaged parts immediately to prevent leaks and maintain functionality.
While knife gate valves are primarily designed for liquids and slurries, they can also be used for gases in certain low pressure applications. However, they are generally not recommended for gases due to potential sealing problems.
Knife gate valves can be made from different materials depending on the application, e.g:
  • Stainless steel: For corrosion resistance and durability.
  • Cast iron: For general purpose applications with less corrosive media.
  • Nodular cast iron: Offers higher strength and impact resistance than cast iron.
  • Special alloys: For handling aggressive chemicals and high-temperature applications.
Consider the following factors when selecting a knife gate valve: 
  • Type of media: make sure the gate valve material is compatible with the fluid or slurry.
  • Pressure and temperature: Check the pressure and temperature ratings of the gate valve to ensure they meet the application requirements.
  • Size and flow requirements: Match the valve size to the piping and flow rate.
  • Operating mode: Determine whether manual, pneumatic, hydraulic or electric actuation is required. 
  • Industry standards: Ensure that the valve fulfils the relevant industry standards and certifications for your application.