Knife Gate Valve
As a leading supplier of knife gate valves, we supply a wide range of knife gate valves to meet the needs of different application scenarios.
Knife gate valve is characterized by compact structure, good sealing, wear resistance, suitable for particles and viscous media, simple maintenance, and quick opening and closing, to ensure efficient and stable operation of pipeline system.
Features of Knife Gate Valve
Knife gate valve is a valve commonly used to control the flow of media, and its Structural characteristics are as follows: The ultra-short structure design saves materials and reduces the overall weight of the piping system ; Compact valve body with reinforcement design, small size, less space, can effectively support pipe strength and reduce vibration ; The thin structure of the electric knife gate valve further reduces the flow resistance and is easy to install and disassemble.
The sealing surface is made of metal or elastic material, which can be bidirectional sealing and prevent leakage ; The ram and base are made of hard material, resistant to corrosion and suitable for high viscosity, granular media .
Suitable for high pressure (1.0- 2.5MPa), high temperature, and solid particle-containing working conditions ; Especially suitable for grout, mud and other complex media truncation control .
Application
With its compact structure, reliable sealing, strong hard-wearing and corrosion resistance, knife gate valve is widely used in the following fields:
- tailings disposal
- slag discharge
- metallurgy process
- wastewater treatment
- city water supply and drainage
- power industry, chemical industry production
- oil industry pulp papermaking
- food processing
- shipbuilding and energy system
- architecture and medicine
Knife Gate Valve
- Material Sheet
- Specifications
| ITEM | PARTS NAME | MATERIAL |
| 1 | BODY | WCB / CF8M |
| 2 | SEAT | AISI 304 / AISI 316 |
| 3 | GATE | METAL / RESILIENT |
| 4 | PACKING | PTFE |
| 5 | GLAND FOLLOWER | STAINLESS STEEL |
| 6 | BONNET | WCB / CF8M |
| 7 | STEM | STAINLESS STEEL |
| 8 | YOKE | CARBON STEEL |
| 9 | B-RING | WCB |
| 10 | HANDWHEEL | CARBON STEEL |
Nominal diameter: DN80 to DN100
Nominal pressure: PN10, PN16, PN25, PN40
Shell test: 1.5 × PN
Leak test: 1.1 × PN
Uni-directional service
Rising stem and non-rising stem
Resilient seat and metal seat
Actuator: manual, pneumatic, and electric
Design and manufacture: DIN 19704, AWWA C520, EN13445, ASME IX
Flange connection: EN1092, ASME 16.5, ASME 16.47, and AWWA C207
Testing and acceptance: EN-12266-1, ASME 16.34, AWWA C520 & MSS-SP-151
Knife gate valve adopts a blade gate plate, compact structure, wear-resistant, and clog-resistant, designed for fast cutting off particles or viscous media. The gate valve is mostly a wedge-shaped seal, which is suitable for flow regulation and stable throttling of clean fluid.
The overall size of the knife gate valve is large, and sufficient operating space should be reserved when opening. The installation is limited to a small environment. The valve plate movement speed is slow, manual operation requires a large torque. Long-term friction of the sealing surface can easily produce erosion and scratches, resulting in an increased risk of leakage, a short maintenance period, and high repair difficulty. It is only suitable for the fully open or fully closed state, and has weak flow regulation ability. It is not suitable for scenarios requiring fine control of the medium.
Aging of the material, scratches, or deformation of the sealing surface can lead to leakage.
The replacement of the knife gate valve should be comprehensively evaluated according to working medium, operating frequency, and cost. Globe valves and ball valves are suitable for low-pressure conventional scenarios, while complex conditions such as high temperature and containing solid media, still rely on the unique performance of knife gate valves.