{"id":8852,"date":"2019-03-02T16:58:41","date_gmt":"2019-03-02T13:58:41","guid":{"rendered":"https:\/\/valve.tr\/knife-valves\/"},"modified":"2025-05-12T12:04:37","modified_gmt":"2025-05-12T09:04:37","slug":"knife-valves","status":"publish","type":"page","link":"https:\/\/valve.tr\/en\/knife-valves\/","title":{"rendered":"Knife Valves"},"content":{"rendered":"[vc_row type=”in_container” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none”][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” column_element_spacing=”default” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”2\/3″ tablet_width_inherit=”default” tablet_text_alignment=”default” phone_text_alignment=”default” bg_image_animation=”none” border_type=”simple” column_border_width=”none” column_border_style=”solid”][vc_column_text]\n

DIN Knife Valves<\/h2>\n\n\n\n\n\n\n\n\n
\n

Ingredients :<\/p>\n<\/td>\n

Steel, Stainless Steel, Monel, Hastelloy, Duplex, Super Duplex <\/span><\/td>\n<\/tr>\n
\n

Connection :<\/p>\n<\/td>\n

Flanged, Welded, <\/span><\/td>\n<\/tr>\n
\n

Drive Unit :<\/p>\n<\/td>\n

 Manual , Pneumatic , Electric , Hydraulic<\/td>\n<\/tr>\n
\n

Temperature :<\/p>\n<\/td>\n

max. (+1200 \u00b0C) <\/span><\/td>\n<\/tr>\n
\n

Nominal Diameter :<\/p>\n<\/td>\n

DN40″ – 1600<\/span><\/td>\n<\/tr>\n
\n

Rated Pressure:<\/p>\n<\/td>\n

Class 10 – 100<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

ANSI Knife Valves<\/h2>\n\n\n\n\n\n\n\n\n
\n

Ingredients :<\/p>\n<\/td>\n

Cast Iron, Ductile Iron, Steel, Stainless Steel, Monel, Hastelloy, Duplex, Super Duplex <\/span><\/td>\n<\/tr>\n
\n

Connection :<\/p>\n<\/td>\n

Wafer, Lug, Double Flanged<\/td>\n<\/tr>\n
\n

Drive Unit :<\/p>\n<\/td>\n

Manual , Pneumatic , Electric , Hydraulic<\/td>\n<\/tr>\n
\n

Temperature :<\/p>\n<\/td>\n

Max. (+1200 \u00b0C) <\/td>\n<\/tr>\n
\n

Nominal Diameter :<\/p>\n<\/td>\n

2\u2033 – 64\u2033<\/td>\n<\/tr>\n
\n

Rated Pressure:<\/p>\n<\/td>\n

Class 150<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/h3>\n[\/vc_column_text][\/vc_column][vc_column column_padding=”padding-1-percent” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” column_element_spacing=”default” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/3″ tablet_width_inherit=”default” tablet_text_alignment=”default” phone_text_alignment=”default” bg_image_animation=”none” border_type=”simple” column_border_width=”none” column_border_style=”solid”][\/vc_column][\/vc_row][vc_row type=”in_container” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none”][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” column_element_spacing=”default” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” tablet_text_alignment=”default” phone_text_alignment=”default” bg_image_animation=”none” border_type=”simple” column_border_width=”none” column_border_style=”solid”][vc_column_text]\n

What is a Knife Valve?<\/h2>\n

Knife valves are a type of valve that controls the flow of fluids, especially in industrial areas. These valves are generally preferred in systems where solid and viscous fluids are transported. The knife gate valve takes its name from the blade-shaped component inside. This blade cuts the solids in the fluid, allowing the flow to continue unhindered when the valve is open. These valves are commonly used to transport fluids such as wastewater, chemicals, oils, dry materials and similar fluids. In addition, knife gate valves can provide durable performance even in harsh and demanding conditions. <\/p>\n

Knife valves have a knife-shaped element in their internal structure, which cuts the solids in the fluid during valve closure. This feature is one of the most obvious differences that distinguish knife valves from other types of valves. Knife valves are often used in large diameter pipelines and are highly effective for the passage of fluids, especially waste. Their strong and durable construction makes them a reliable solution even in harsh operating conditions. <\/p>\n

Working Principle of Knife Valves<\/h2>\n

The principle of operation of knife valves is actually quite simple and is related to the interception of fluids. The main component of the valve is a knife-shaped element. This blade cuts through the solids in the fluid as the valve closes, and so the valve allows the free passage of trapped or blocked fluids. The blade inside the valve is usually made of durable materials such as stainless steel, as such fluids often have corrosive properties. When the valve is fully closed, the blade cuts through solids inside the pipe, ensuring a completely leak-tight closure. <\/p>\n

Knife valves usually operate with a 90 degree rotary movement. This allows the valve to open and close quickly and makes it easier for the user to intervene in the operation. The knife-edge design of the valve is particularly advantageous in systems handling liquids containing solids, such as wastewater. Solids are prevented from damaging the valve system or causing blockage. This operating principle is a factor that increases the reliability of knife gate valves and makes them indispensable, especially in industrial systems. <\/p>\n

Advantages of Knife Valves<\/h2>\n

One of the biggest advantages of knife valves is their ability to cut through solids. This makes them particularly ideal in wastewater treatment plants, oil and chemical handling systems and other heavy industrial applications. Solids are prevented from clogging the valve, thus increasing the efficiency of the system and reducing the need for maintenance. In addition, knife valves have a long service life as they are resistant to harsh conditions and offer reliable performance even under extreme operating conditions. This makes them a preferred choice with low maintenance requirements. <\/p>\n

Another advantage is the fast opening and closing capabilities of knife valves. Knife valves can be opened and closed quickly as they usually operate with a 90 degree rotating motion. This is a great advantage in emergency situations or in systems that require quick intervention. Furthermore, knife valves can be used effectively in large diameter pipelines and systems with high fluid velocities. Depending on the velocity of the fluid, the valve system operates efficiently and pressure losses in the system are minimized. <\/p>\n

Application Areas of Knife Valves<\/h2>\n

Knife valves are widely used especially in industrial applications. These valves are frequently preferred in waste water treatment plants, chemical production plants, food processing industry and power plants. In systems where solid and viscous materials are transported, knife valves play an important role. They can also be used in large pipelines and in the transportation of gases and liquids. Knife valves increase efficiency in such systems while minimizing leakage possibilities. They also reduce the maintenance needs of the valve system, saving money in the long run. <\/p>\n

In the food and pharmaceutical industries, knife valves are often used for the transportation of liquids and solids. Since hygiene standards in these sectors must be very high, the design of knife valves is usually in line with the ease of sterilization and cleaning. In applications related to chemical transportation, the fact that these valves are made of durable materials and can cope with high temperatures makes them preferable. Knife valves can be used effectively even in harsh conditions, and as such they find a place in large projects. <\/p>\n

Maintenance and Repair of Knife Valves<\/h2>\n

Maintenance of knife gate valves is an important operation that should be carried out at regular intervals. The blade inside the valve may wear out over time and may be damaged by contact with solids. In this case, blade replacement may be required. The sealing elements should also be checked and parts that wear out over time should be replaced. Knife valves should usually be maintained by specialists because the knife inside the valve plays an important role in cleaning and cutting off the fluids in the pipe. <\/p>\n

Repairs usually start with checking the valve body and the knife element for proper functioning. If the blade inside the valve is damaged, this part is replaced with a new one. The connections and seals on the axis of the valve should also be checked regularly. If maintenance and repair operations are not carried out correctly, the fluid in the system may leak and the efficiency of the valve may decrease. For this reason, it is important that knife valves are maintained at regular intervals. <\/p>\n

Disadvantages of Knife Valves<\/h2>\n

In addition to the many advantages of knife valves, there are also some disadvantages. Foremost among these is that these valves only offer full opening and full closing functionality. This means that partial flow control cannot be achieved. This can be a problem in some applications, especially in systems that require precise flow control. For situations requiring partial opening or closing, other types of valves may be more suitable. <\/p>\n

Another disadvantage is that knife-edge valves often fail to operate efficiently in high-pressure and extreme temperature conditions. In such environments, knife-edge valves can wear out more, which can adversely affect the performance of the system. Therefore, in applications requiring very high pressure, more durable and robust alternatives to knife-edge valves may need to be preferred. However, in low and medium pressure systems, knife gate valves are still the preferred choice. <\/p>\n

Types of Knife Valves<\/h2>\n

Knife valves can be manufactured in different types according to various materials and designs. One of the most common types is knife valves made of stainless steel. These types of valves are durable and long-lasting, and can also be compatible with chemicals. Plastic knife valves offer lower cost and lightweight options, but are less corrosive and chemical resistant. Knife valves made from materials such as steel and cast iron are particularly favored in heavy industrial applications. <\/p>\n

Another important variety is the bi-directional knife valves. These valves allow flow in both directions and perform a shut-off function in the opposite direction. Such knife valves are used in systems where the direction of the fluid changes frequently and offer more flexible solutions. In addition, knife valves manufactured with special coatings and protective treatments can be used in high temperature and corrosive environments. These variants enable knife valves to address a wide range of applications. [\/vc_column_text][\/vc_column][\/vc_row][vc_row type=”full_width_background” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” bg_color=”#f7f7f7″ scene_position=”center” top_padding=”100″ bottom_padding=”100″ text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none”][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” column_element_spacing=”default” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” tablet_text_alignment=”default” phone_text_alignment=”default” bg_image_animation=”none” border_type=”simple” column_border_width=”none” column_border_style=”solid”][vc_column_text]\n

Frequently Asked Questions<\/h2>\n[\/vc_column_text][toggles style=”minimal”][toggle color=”Default” title=”What is a Knife Valve?”][vc_column_text]Knife gate valves work exactly as their name suggests, through the emergency closure of a plate as a closing element. Such valves were originally designed for the pulp and paper industry.[\/vc_column_text][\/toggle][toggle color=”Default” title=”What are the advantages and disadvantages of Knife Valves?”][vc_column_text]The advantages of knife valves are that they are inexpensive, easy to operate and lightweight. One of the most significant disadvantages of knife valves is that they are known to have low pressure limitations. This makes them less desirable for use in applications that require cleaning or sanitary conditions.[\/vc_column_text][\/toggle][toggle color=”Default” title=”Can actuators be installed on knife valves?”][vc_column_text]Available with Manual, Pneumatic and Electric and Hydraulic Actuator,[\/vc_column_text][\/toggle][\/toggles][\/vc_column][\/vc_row][vc_row type=”in_container” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none”][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” column_element_spacing=”default” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” tablet_text_alignment=”default” phone_text_alignment=”default” bg_image_animation=”none” border_type=”simple” column_border_width=”none” column_border_style=”solid”][\/vc_column][\/vc_row]\n","protected":false},"excerpt":{"rendered":"

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