Knife-gate valve with handwheel
Slide gate valve rising stem or non-rising
The handwheel of a knife-gate valve is a type of manual operation that is normally used to control valves. The handwheel is connected to the spindle of the valve. Turning the handwheel rotates the spindle, which raises and lowers the slide plate of the knife gate valve in the body of the valve, controlling the flow of the liquid. The simple and reliable actuator requires no power source or electrical connections. It can be used in a variety of environments where a power supply is not possible or where electric actuators are impractical. The size and design of the handwheel can vary depending on the knife gate valve and application. Some handwheels are equipped with locking mechanisms to hold the knife-gate valve in position, while others use a gearbox or worm drive to increase the mechanical advantage and ease of turning the handwheel.
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
Body:
Grey Cast Iron
Grey Cast Iron
Nominal width :
DN150 - 6'' inch
DN150 - 6'' inch
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
Design :
sealing on one side
sealing on one side
Available, delivery time: in stock
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
DN100 - 4'' inch
Body:
Grey Cast Iron
Grey Cast Iron
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
Design :
sealing on both sides
sealing on both sides
Available, delivery time: in stock
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
Design :
sealing on both sides
sealing on both sides
Body:
Grey Cast Iron
Grey Cast Iron
Nominal width :
DN150 - 6'' inch
DN150 - 6'' inch
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
Available, delivery time: in stock
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
Design :
sealing on one side
sealing on one side
Nominal width :
DN100 - 4'' inch
DN100 - 4'' inch
Body:
Grey Cast Iron
Grey Cast Iron
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
Available, delivery time: in stock
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
Grey Cast Iron
Nominal width :
DN250 - 10'' inch
DN250 - 10'' inch
Actuation :
Handwheel (non-rising)
Handwheel (non-rising)
Design :
sealing on both sides
sealing on both sides
Available, delivery time: in stock
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
Design :
sealing on one side
sealing on one side
Body:
Grey Cast Iron
Grey Cast Iron
Nominal width :
DN150 - 6'' inch
DN150 - 6'' inch
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
Available, delivery time: in stock
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
sealing on both sides
Body:
Grey Cast Iron
Grey Cast Iron
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
Nominal width :
DN200 - 8'' inch
DN200 - 8'' inch
Available, delivery time: in stock
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
Design :
sealing on both sides
sealing on both sides
Body:
Grey Cast Iron
Grey Cast Iron
Nominal width :
DN150 - 6'' inch
DN150 - 6'' inch
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
Available, delivery time: in stock
FM200 Knife gate valve DN 150 EPDM stainless-steel handwheel rising stem Product number: 270-1005-14
Knife gate valve DN 150 PN10 Wafer-type unidirectional design, 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, actuation: handwheel with rising stem
Body:
Stainless Steel
Stainless Steel
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
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 100 NBR Cast iron Handwheel with rising stem Product number: 270-1001-12
Wafer type knife gate valve DN 100 PN10 Single-seated design, seat ring made of NBR, 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
Nominal width :
DN100 - 4'' inch
DN100 - 4'' inch
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
Body:
Grey Cast Iron
Grey Cast Iron
Design :
sealing on one side
sealing on one side
Available, delivery time: in stock
FM200 Knife-gate valve DN 80 Metal cast iron Handwheel with rising stem Product number: 270-1002-11
Wafer-type knife gate valve/flat knife gate valve DN 80 PN10, single-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
Design :
sealing on one side
sealing on one side
Body:
Grey Cast Iron
Grey Cast Iron
Nominal width :
DN80 3'' inch
DN80 3'' inch
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
Available, delivery time: in stock
FB700 Knife-gate valve DN 250 EPDM Cast iron Stainless steel Handwheel with rising stem Product number: 270-3000-18
Wafer-type knife gate valve/flat knife gate valve DN250 PN10, double-seated 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, actuation handwheel with rising stem, nominal pressure 10 bar
Body:
Grey Cast Iron
Grey Cast Iron
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
Nominal width :
DN250 - 10'' inch
DN250 - 10'' inch
Design :
sealing on both sides
sealing on both sides
Available, delivery time: in stock
FM200 Knife-gate valve DN 65 NBR Cast iron Handwheel with rising stem Product number: 270-1001-10
Knife gate valve DN 65 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
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
Body:
Grey Cast Iron
Grey Cast Iron
Design :
sealing on one side
sealing on one side
Nominal width :
DN65 - 2 1/2'' inch
DN65 - 2 1/2'' inch
Available, delivery time: in stock
FB700 Knife-gate valve DN 80 EPDM Cast iron GG25 Handwheel with rising stem Product number: 270-3000-11
Wafer type knife gate valve DN 80 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
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
Nominal width :
DN80 3'' inch
DN80 3'' 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 150 NBR Stainless steel handwheel rising stem Product number: 270-1015-14
Knife gate valve DN 150 PN10 stainless steelSingle-seated design, seat ring made of NBR, body made of stainless steel CF8M(1.4408), gate valve plate made of stainless steel SS316L (1.4404), stem made of stainless steel SS303 (1.4305), actuation handwheel with rising stem
Design :
sealing on one side
sealing on one side
Nominal width :
DN150 - 6'' inch
DN150 - 6'' inch
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
Body:
Stainless Steel
Stainless Steel
Available, delivery time: in stock
FM200 Knife-gate valve DN 250 NBR Cast iron Handwheel with rising stem Product number: 270-1001-18
Wafer-type knife gate valve/flat knife gate valve DN 250 PN10, single-seated design, seat ring made of NBR, 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
Design :
sealing on one side
sealing on one side
Body:
Grey Cast Iron
Grey Cast Iron
Nominal width :
DN250 - 10'' inch
DN250 - 10'' inch
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
Available, delivery time: in stock
FM200 Knife gate valve DN 200 NBR Cast iron Handwheel with rising stem Product number: 270-1001-16
Wafer-type knife gate valve/flat knife gate valve DN 200 PN10Single-seated design, seat ring made of NBR, 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
Design :
sealing on one side
sealing on one side
Body:
Grey Cast Iron
Grey Cast Iron
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
Nominal width :
DN200 - 8'' inch
DN200 - 8'' inch
Available, delivery time: in stock
FB700 Knife-gate valve DN 125 NBR cast iron handwheel with rising stem Product number: 270-3001-13
Knife gate valve DN 125 PN10 handwheelDouble 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
Design :
sealing on both sides
sealing on both sides
Nominal width :
DN125 - 5'' inch
DN125 - 5'' inch
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
Body:
Grey Cast Iron
Grey Cast Iron
Available, delivery time: in stock
FB700 Knife gate valve DN 80 NBR cast iron handwheel with rising stem Product number: 270-3001-11
Wafer type gate valve DN 80 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
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
Design :
sealing on both sides
sealing on both sides
Body:
Grey Cast Iron
Grey Cast Iron
Nominal width :
DN80 3'' inch
DN80 3'' inch
Available, delivery time: in stock
FM200 Knife-gate valve DN 200 EPDM Cast iron Handwheel with rising stem Product number: 270-1000-16
Knife gate valve DN 200 PN10 Single-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), packing: PTFE-Synt./EPDM/PTFE-Synt, operation handwheel with rising stem
Design :
sealing on one side
sealing on one side
Body:
Grey Cast Iron
Grey Cast Iron
Actuation :
Handwheel (rising stem)
Handwheel (rising stem)
Nominal width :
DN200 - 8'' inch
DN200 - 8'' inch
Available, delivery time: in stock
Knife gate valves - properties, applications and seals
The knife gate valve plays a crucial role in industrial fluid technology. This innovative valve, also known as a slide gate valve, has been specially developed for the precise flow of liquids and gases. It is available in high-quality stainless steel and robust grey cast iron (GG25) in nominal sizes from DN50 to DN600.
Ein wesentlicher Unterschied in der Bedienung zeigt sich im Handrad. Bei der Ausführung mit steigendem Handrad hebt sich der Bedienhebel während des Betriebs, was eine ergonomische Handhabung und eine Feineinstellung der Durchflussmenge ermöglicht. Im Gegensatz dazu bleibt der Hebel der nichtsteigenden Version in einer festen Position, was eine direkte Kraftübertragung gewährleistet. Beide Varianten haben ihre eigenen Vor- und Nachteile und finden ihren Platz in unterschiedlichen industriellen Anwendungen.
Der Stoffschieber ist in verschiedenen Materialien erhältlich. Edelstahl besticht durch seine hohe Korrosionsbeständigkeit und ist ideal für hygienische Umgebungen, während Grauguss (GG25) eine kostengünstige Alternative ist, die in weniger anspruchsvollen Bereichen eingesetzt wird. Der Sitzring, der als Dichtung fungiert, ist in Varianten wie NBR, EPDM und Metall erhältlich. Besonders wichtig ist die Temperaturbeständigkeit der Dichtungen: NBR-Dichtungen arbeiten zuverlässig in einem Temperaturbereich von etwa -30 °C bis 120 °C, während EPDM-Dichtungen oft Temperaturen von -40 °C bis 150 °C standhalten. Metalldichtungen werden dort eingesetzt, wo extrem hohe Temperaturen und besondere Anforderungen an die Beständigkeit erforderlich sind.
Je nach Anwendung kann der Stoffschieber einseitig oder beidseitig dichtend ausgeführt werden. Diese Ausführungen gewährleisten eine zuverlässige Abdichtung und verhindern Leckagen in anspruchsvollen Industriesystemen. Plattenschienen und Schieber werden in Bereichen wie Wasser- und Dampfleitungen sowie in chemischen Prozessen eingesetzt.
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.