The ebro WB 14E lug type knife gate valve is an industrial valve built strictly to the MSS-SP81 face-to-face standard. The series covers nominal sizes from DN 80 to DN 600 and supports multiple flange connection standards including ASME Class 150, with a leakage class of up to EN 12266-1 Rate A. The valve has a maximum operating temperature of 120 °C; its pressure rating depends on the nominal size, up to a maximum of 10 bar. Depending on system requirements, users can flexibly select handwheel, pneumatic, electric, or hydraulic cylinder actuation.
WB 14E Bidirectional Sealing Lug Type Knife Gate Valve Product Image
EBRO
WB 14E Bidirectional Sealing Lug Type Knife Gate Valve | EBRO
Product code: WB14E
Lug type knife gate valve manufactured to the MSS-SP81 standard, designed for shut-off and isolation in slurry and sewage sludge pipelines.
- Category
- Knife Gate Valves
- Maximum Operating Temperature
- 120 °C
- Maximum Operating Pressure
- DN 80 - DN 300: 10 bar; DN 350 - DN 450: 6 bar or 10 bar; DN 500 - DN 600: 4 bar or 10 bar
Specifications
- Nominal Diameter
- DN 80 - DN 600
- Face-to-Face Standard
- MSS-SP81
- Flange Connection Standards
- ASME/ANSI B 16.5; Class 150; AS 2129 Table D and E
- Leakage Class
- EN 12266-1:2009 Rate A
- Maximum Operating Temperature
- 120 °C
- Maximum Operating Pressure
- DN 80 - DN 300: 10 bar; DN 350 - DN 450: 6 bar or 10 bar; DN 500 - DN 600: 4 bar or 10 bar
- Actuator Types
- Handwheel, chain wheel, pneumatic actuator, electric actuator, hydraulic cylinder
Application scenarios
Pulp and Paper Stock Pipeline Shut-Off
Installed on pulp or stock conveying lines in pulp and paper systems to cut off and isolate fiber-containing pulp media. The full-bore straight-through flow path and favorable flow characteristics of the knife gate valve reduce fiber accumulation and blockage inside the valve, meeting the shut-off requirements of stock conveying lines, with operating pressure and temperature within the product's specified limits.
Municipal and Industrial Sewage Sludge Treatment
Installed on sludge conveying and isolation lines in municipal wastewater treatment plants and industrial effluent treatment facilities to shut off sewage sludge media containing suspended solids. The valve offers bidirectional sealing with a leakage class of EN 12266-1:2009 Rate A, achieving reliable shut-off within the product's maximum pressure range of 10 bar (DN 80 - DN 300).
Biomass Slurry Conveying and Processing System Isolation
Installed on slurry media lines in biomass conveying or processing systems to cut off media during sectional equipment isolation and maintenance. The knife gate structure cuts through biomass slurry containing solid or fibrous components, and the full-bore flow path facilitates the passage of solids-laden media; operating conditions must remain within the product's specified pressure and temperature ranges.
Selection points
Bidirectional Rate A Tight Shut-Off
The core selection criterion is the leakage class, specified in the product documentation as EN 12266-1:2009 Rate A, meeting tight shut-off requirements; the sealing is bidirectional, allowing installation without regard to pressure direction in lines with uncertain flow direction and enabling bidirectional isolation.
Lug Body Design Suitable for Dead-End Service
The product is a lug type knife gate valve with face-to-face dimensions conforming to MSS-SP81, as stated directly in the product documentation; the lug body can be independently secured at the end of a pipeline, making it suitable for dead-end service and end-of-line isolation. When closed, downstream pipe sections can be removed for maintenance without affecting the upstream line.
FAQ
What are the nominal sizes and connection standards of the ebro WB 14E lug type knife gate valve?
The WB 14E covers nominal sizes from DN 80 to DN 600, with face-to-face dimensions to the MSS-SP81 standard. Flange connections correspond to the ASME/ANSI B 16.5, Class 150, and AS 2129 Table D and E standards; selection should be matched to the pipeline flange standard.
How do I determine the maximum operating pressure of the WB 14E based on nominal size?
The maximum operating pressure of the WB 14E depends on nominal size: DN 80 to DN 300 is rated 10 bar; DN 350 to DN 450 is rated 6 bar or 10 bar; DN 500 to DN 600 is rated 4 bar or 10 bar. The specific pressure rating should be confirmed against the actual model and system operating conditions.
Which actuation options are suitable for the WB 14E lug type knife gate valve?
The series can be configured with a handwheel, chain wheel, pneumatic actuator, electric actuator, or hydraulic cylinder according to system operation requirements. Actuation selection should be based on the valve installation location, operating frequency, and on-site control requirements.
What are the leakage class and maximum operating temperature of the WB 14E?
The WB 14E achieves a leakage class of up to EN 12266-1:2009 Rate A, with a maximum operating temperature of 120 °C. In use, the pressure rating for the actual nominal size and the system temperature conditions should also be verified.