Pneumatic Knife Gate Valves
Pneumatic knife gate valves, often referred to as slide gate valves or slider valves, are essential components of various industrial applications to assure accurate flow control. These valves are furnished with a double-acting actuator and supplied with either single-sided or double-sided seals in materials such as metal, NBR, or EPDM. Fergo offers these valves with built-in seals which are PTFE-syn/NBR/PTFE-syn and PTFE-syn/EPDM/PTFE-syn to increase durability. Internally, an extensive range of components can seamlessly be assembled with this such as IFM IFT206 Inductive Sensor, Namur valves 3/2-way or 5/2-way, and many more. Explore our diverse portfolio of pneumatic valve solutions to match unique applications.
Design, materials and automation of FERGO knife gate valves
FERGO knife gate valves are characterised by their robust design using materials such as stainless steel and grey cast iron. They are available in various designs, including wafer and flanged versions, with NBR, EPDM or metal seat ring seals. They can be controlled both electrically and pneumatically, with modern options such as electro-pneumatic actuators, electronic limit switches and limit switches contributing to automation. These knife gate valves therefore offer an ideal solution for precise and controlled material flows in various process engineering applications.
Knife gate valves with AUMA electric actuators
Fergo is a reliable German company that offers knife gate valves (Slide Gate Valve) with AUMA electric actuators that use automation technology to efficiently control the flow for industrial applications. Our slide gate valves are strong and effective and continuously fulfil the most demanding tasks. We also specialise in assembling valves quickly and getting them to you fast to minimise downtime. Fergo has been in business for over 20 years, providing solid solutions customised to your requirements. Our automated gate valves ensure smooth operation and are therefore suitable for a wide range of industries. Order our gate valves today and benefit from the high quality of our products. Contact us for fast delivery and expert support.
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
Body:
Grey Cast Iron
Grey Cast Iron
Nominal width :
DN100 - 4'' inch
DN100 - 4'' inch
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Design :
sealing on one side
sealing on one side
Available, delivery time: in stock
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
sealing on both sides
Nominal width :
DN150 - 6'' inch
DN150 - 6'' inch
Body:
Grey Cast Iron
Grey Cast Iron
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Available, delivery time: in stock
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
sealing on one side
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Body:
Grey Cast Iron
Grey Cast Iron
Nominal width :
DN150 - 6'' inch
DN150 - 6'' inch
Available, delivery time: in stock
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
sealing on both sides
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Nominal width :
DN100 - 4'' inch
DN100 - 4'' inch
Body:
Grey Cast Iron
Grey Cast Iron
Available, delivery time: in stock
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
Nominal width :
DN200 - 8'' inch
DN200 - 8'' inch
Body:
Grey Cast Iron
Grey Cast Iron
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Design :
sealing on both sides
sealing on both sides
Available, delivery time: in stock
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
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Body:
Grey Cast Iron
Grey Cast Iron
Nominal width :
DN150 - 6'' inch
DN150 - 6'' inch
Design :
sealing on one side
sealing on one side
Available, delivery time: in stock
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
Design :
sealing on one side
sealing on one side
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Body:
Grey Cast Iron
Grey Cast Iron
Nominal width :
DN200 - 8'' inch
DN200 - 8'' inch
Available, delivery time: in stock
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
Grey Cast Iron
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Design :
sealing on one side
sealing on one side
Nominal width :
DN100 - 4'' inch
DN100 - 4'' inch
Available, delivery time: in stock
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
sealing on both sides
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Body:
Grey Cast Iron
Grey Cast Iron
Nominal width :
DN200 - 8'' inch
DN200 - 8'' inch
Available, delivery time: in stock
FB700 Knife-gate valve DN 100 EPDM cast iron double-acting pneumatic actuator Product number: 270-3010-12
Wafer type knife gate valve DN 100 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 double-acting pneumatic actuator
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Nominal width :
DN100 - 4'' inch
DN100 - 4'' inch
Body:
Grey Cast Iron
Grey Cast Iron
Design :
sealing on both sides
sealing on both sides
Available, delivery time: in stock
FM200 Knife-gate valve DN 80 NBR cast iron double-acting pneumatic actuator Product number: 270-1011-11
Knife Gate Valve DN 80 - Flat Gate Valve DN 80 PN10Design 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
Design :
sealing on one side
sealing on one side
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Body:
Grey Cast Iron
Grey Cast Iron
Nominal width :
DN80 3'' inch
DN80 3'' inch
Available, delivery time: in stock
FB700 Knife-gate valve DN 50 EPDM cast iron double-acting pneumatic actuator Product number: 270-3010-09
Wafer type knife gate valve DN 50 PN10Design bi-directional | seat ring U-bolt seal NBR with profile steel core reinforcement, body made of grey cast iron (GG25), gate & stem made of stainless steel, plate guide with integrated scraping effect, packing PTFE-Synt./NBR/PTFE-Synt. | double-acting pneumatic actuator
Nominal width :
DN50 - 2'' inch
DN50 - 2'' inch
Design :
sealing on both sides
sealing on both sides
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Body:
Grey Cast Iron
Grey Cast Iron
Available, delivery time: in stock
FM200 Knife gate valve DN 150 metallic cast iron double-acting pneumatic actuator Product number: 270-1003-14
Knife Gate Valve DN 150 PN10Design single-seated, seat ring made of metal, 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
Design :
sealing on one side
sealing on one side
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Body:
Grey Cast Iron
Grey Cast Iron
Nominal width :
DN150 - 6'' inch
DN150 - 6'' inch
Available, delivery time: in stock
FM200 Knife-gate valve DN 150 NBR stainless steel double-acting Pneumatic actuator Product number: 270-1017-14
Wafer-type knife gate valve DN 150 PN10Single-seated design, seat ring made of NBR, body made of stainless steel CF8M(1.4408), knife gate valve plate made of stainless steel SS316L (1.4404), stem made of stainless steel SS303 (1.4305) with pneumatic double acting
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Body:
Stainless Steel
Stainless Steel
Nominal width :
DN150 - 6'' inch
DN150 - 6'' inch
Design :
sealing on one side
sealing on one side
Available, delivery time: in stock
FM200 Knife-gate valve DN 50 metallic cast iron double-acting pneumatic actuator Product number: 270-1003-09
Knife gate valve DN 50 PN10Design single-seated, seat ring made of metal, 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
sealing on one side
Nominal width :
DN50 - 2'' inch
DN50 - 2'' inch
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Body:
Grey Cast Iron
Grey Cast Iron
Available, delivery time: in stock
FM200 Knife-gate valve DN 125 EPDM double-acting cast iron Pneumatic actuator Product number: 270-1008-13
Wafer-type knife gate valve/flat knife gate valve DN 125 PN10, single-seated design, seat ring made of EPDM, body made of grey cast iron (GG25), valve plate made of stainless steel SS304L (1.4306), stem made of stainless steel SS303 (1.4305) with pneumatic double-acting actuator
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Body:
Grey Cast Iron
Grey Cast Iron
Nominal width :
DN125 - 5'' inch
DN125 - 5'' inch
Design :
sealing on one side
sealing on one side
Available, delivery time: in stock
FM200 Knife-gate valve DN 125 NBR cast iron double-acting Pneumatic actuator Product number: 270-1011-13
Wafer-type knife gate valve/flat knife gate valve DN 125 PN10, single-seated design, seat ring made of NBR, body made of grey cast iron (GG25), valve plate made of stainless steel SS304L (1.4306), stem made of stainless steel SS303 (1.4305) with pneumatic double acting
Design :
sealing on one side
sealing on one side
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Body:
Grey Cast Iron
Grey Cast Iron
Nominal width :
DN125 - 5'' inch
DN125 - 5'' inch
Available, delivery time: in stock
FM200 Knife gate valve DN 100 EPDM stainless-steel Pneumatic Product number: 270-1006-12
Knife gate valve pneumatic DN 50 PN10 Unidirectional design, Wafer body made of stainless steel CF8M (1.4408), gate made of stainless steel SS316L (1.4404), stem made of stainless steel SS303 (1.4305), seat ring made of EPDM, with pneumatic double-acting actuator
Design :
sealing on one side
sealing on one side
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Nominal width :
DN100 - 4'' inch
DN100 - 4'' inch
Body:
Stainless Steel
Stainless Steel
Available, delivery time: in stock
FB700 Knife-gate valve DN 125 NBR cast iron double-acting pneumatic actuator Product number: 270-3011-13
Knife gate valve DN 125 PN10 made of GG25Design 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
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Nominal width :
DN125 - 5'' inch
DN125 - 5'' inch
Body:
Grey Cast Iron
Grey Cast Iron
Design :
sealing on both sides
sealing on both sides
Available, delivery time: in stock
FB700 Knife-gate valve DN 65 EPDM cast iron double-acting pneumatic actuator Product number: 270-3010-10
Knife Gate Valve - Flat Gate Valve DN 65 PN10Design bi-directional | seat ring U-bolt seal NBR with profile steel core reinforcement, body made of grey cast iron (GG25), gate & stem made of stainless steel, plate guide with integrated scraping effect, packing PTFE-Synt./NBR/PTFE-Synt. | double-acting pneumatic actuator
Nominal width :
DN65 - 2 1/2'' inch
DN65 - 2 1/2'' inch
Design :
sealing on both sides
sealing on both sides
Actuation :
Pneumatic Actuator
Pneumatic Actuator
Body:
Grey Cast Iron
Grey Cast Iron
Available, delivery time: in stock
Pneumatic Knife Gate Valves: Mastering Precision Flow Control in Industrial Applications
The pneumatic knife gate valve is a special valve used to control the flow of abrasive and viscous or slurry materials in an industrial environment. It consists of a gate that looks like a knife and, under normal operating conditions, submerges palely into the medium to create an effective seal. A pneumatic actuator drives the gate of the valve by compressed air quickly between an open and a closed position. Fast actuation reduces wear and prevents downtime, which is why these valves are significantly utilized in demanding applications.
Built with strong materials capable of resisting corrosive substances and high pressures, pneumatic knife gate valves are used in mining, wastewater treatment, and pulp and paper production industries. Their unique design allows cutting the gate through thick fluids, which means the pipeline sections can be quickly isolated for maintenance or emergency shutdown operations. Compared to hydraulic or manual systems, a pneumatic system provides higher energy efficiency and operation safety under more hazardous conditions.
Additionally, they require maintenance much less, and the service life is prolonged. They are integral components in industrial process optimization and performance since they help in establishing control of fluid streams. Thus, pneumatic knife gate valves provide a very robust and effective answer to the complex fluid control challenges currently facing modern industry.
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.