WZ73X Bidirectional Wafer Knife Gate Valve
PN10bar, class 150LB
DN50~1400mm
Ductile Iron, Stainless Steel
WZ73X Bidirectional Wafer Knife Gate Valve Product Information
WZ73X bidirectional wafer knife gate valve is self-sealing type gate valve, which is also called is bidirectional slurry valve or mud valve. Its on-off part is the knife type gate, which can cut off fiber materials mediums or similar. Compared with general gate valve, wafer type knife gate valve can save much more installtion space. Bidirectional type knife gate valve is available with metal seated and rubber seated according to different conditions. WZ73X bidirectional wafer knife gate valve is applicable widely in mining, coal washery, steel work, pulp & paper plant, thermal power plant and sewage with fibers treatment. Flowspec Luokai can manufacture and supply the WZ73X bidirectional wafer knife gate valve according to the standard of MSS SP-81 with sizes of 2″~56″ (DN50~1400mm). Welcome to contact us for detailed information and best quotes if you have any questions or inquiries.
1. FEATURES
- Full bore design
- 1PC body design
- Bidirectional sealing
- Investment casting body
- Easy maintenance
- Renewable seat
- Available with gear, pneumatic and electric actuator
3. STANDARDS
- Design & manufacturing: MSS SP-81
- Face to face: MSS SP-81
- Flange standard: PN10, PN16, Class 150LB, JIS 10K, Table E/D
- Inspection & testing: API598
2. TECHNICAL SPECIFICATIONS
- 10bar, class 150LB
- Size: 2”~56” (DN50~1400mm)
- Body materials: ductile iron GGG40, stainless steel 304 CF8, stainless steel 316 CF8M, duplex stainless steel 2205
- Gate materials: stainless steel 304, stainless steel 316, duplex stainless steel 2205
- Seat materials: EPDM, Nitril, Viton, Silicone, metal
- Operated: handwheel, gear box, pneumatic, electric
- Applicable medium: coal, cement slurry, coal slurry, gold mine, sewage
- Applicable temperature: -10℃~+80℃
- Working pressure: 10bar
4. APPLICATIONS
- Thermal power plant
- Mining, steel industry
- Coal washery, metallurgy plant
- Oil, chemical industry
- Textile, food industry
- Pulp and paper industry
- Waste water, sludge, sewage treatment industry
Why Choose Flowspec Luokai
45+ Years Experience
Founded in 1978, manufacturing industrial valves for over four decades with proven reliability worldwide.
Global Certifications
ISO 9001, CE/PED, WRAS, FM, UL, API approved — compliant with international quality and safety standards.
OEM Custom Solutions
Flexible design and manufacturing per your specifications — material, size, pressure, actuation tailored to project needs.
Worldwide Delivery
Exported to 5 continents — North & South America, Europe, Middle East, Southeast Asia, and Africa.
Our Service Promise
Strict Quality Control
Every valve tested to API 598, EN 12266 before shipment
Timely Global Delivery
Reliable logistics to 5 continents with secure packaging
OEM & Custom Design
Tailored material, size, pressure and actuation to your specs
Dedicated After-Sales
Technical support and service throughout product lifecycle


