Bidirectional Knife Gate Valve
A bidirectional knife gate valve is designed to seal effectively from both sides and operates under back pressure, providing better water tightness. This type of valve is less prone to leakage from solid accumulation and is more versatile in applications where flow can occur in either direction. Though typically more expensive, bidirectional valves offer lower torque and thrust requirements and are ideal for installations at the end of pipelines.
Bidirectional Knife Gate Valve Product List
1-16 of 35 results
Hydraulic Knife Gate Valve, Ductile Iron, GGG40, DN800, PN10
This 800 mm knife gate valve is built for heavy-duty industrial slurry and wastewater applications. The ductile iron GGG40 body delivers high strength and impact resistance, while the EPDM seat ensures reliable sealing across a wide temperature range and excellent chemical compatibility. Rated at PN10...
Bidirectional Knife Gate Valve
Pneumatic Actuated Knife Gate Valves, DI GGG40, DN150, PN16
The Pneumatic Actuated Knife Gate Valve is a 6-inch, DN150 bidirectional valve made from ductile iron GGG40 and rated for PN16 and 150 LB. It features a full bore design that allows unrestricted flow with minimal pressure drop. The full PU lining provides strong protection against abrasion and chemical...
Bidirectional Knife Gate Valve
Full Bore Knife Gate Valves, DI GGG40, DN150, PN16, Electric
The Full Bore Knife Gate Valve is a 6-inch, DN150 bidirectional valve constructed from ductile iron GGG40 and rated for PN16 and 150 LB. Its full bore design ensures unrestricted flow passage with minimal pressure drop and no flow restriction. Electric actuation enables automated, remote-controlled...
Bidirectional Knife Gate Valve
GGG40 Knife Gate Valve, DI, DN125, PN16, PU Lined, Electric
The GGG40 Knife Gate Valve is a 5-inch, DN125 bidirectional valve made from ductile iron and rated for PN16. It features a full bore design for maximum flow capacity with minimal pressure loss. The PU lining protects against abrasion and chemical wear. Electric actuation delivers precise, automated...
Bidirectional Knife Gate Valve
PU Lined Knife Gate Valves, DI GGG40, DN150, PN16, Full Bore
The PU Lined Knife Gate Valve is a 6-inch, DN150 bidirectional valve built from ductile iron GGG40 and rated for PN16 and Class 150 LB. It features a full bore design that allows unrestricted media flow with minimal pressure drop. The polyurethane lining provides strong resistance to abrasion and chemical...
Bidirectional Knife Gate Valve
V Port Knife Gate Valve, A216 WCB, 10 Inch, CL150, Pneumatic
The V Port Knife Gate Valve is a 10-inch, 250 mm bidirectional flow control valve built from ASTM A216 WCB carbon steel and rated for Class 150 LB pressure. It features a V-shaped port design for precise throttling and flow regulation. The valve comes with lug ends for easy installation and removal...
Bidirectional Knife Gate Valve
ASTM A216 WCB Knife Gate Valve, 16 IN, CL150, Hydraulic, Lug
This supplier offers a 16-inch carbon steel knife gate valve with an ASTM A216 WCB cast body for cost-effective performance in water, wastewater, and industrial slurry applications. The valve delivers bidirectional shutoff and is rated for Class 150 LB and PN20 pressure requirements. It is built to...
Bidirectional Knife Gate Valve
Electric Actuated Knife Gate Valves, CF8M, DN500, PN16, Lug
This 500 mm electric actuated knife gate valve is built for heavy-duty industrial use. The valve body is cast from ASTM A351 CF8M stainless steel, which resists corrosion in harsh chemical and marine environments. It features a VITON seat for reliable bidirectional sealing against abrasive slurries...
Bidirectional Knife Gate Valve
ASTM A351 CF8M Knife Gate Valves, DN250, PN16, Lug, Electric
ASTM A351 CF8M Knife Gate Valves Plant manufactures a 250 mm knife gate valve with a cast stainless steel body for reliable corrosion resistance. The valve features a VITON seat that handles temperatures up to 200°C and provides bidirectional sealing. It is rated DN250 and PN16, making it suitable...
Bidirectional Knife Gate Valve
Pneumatic Knife Gate Valve, A351 CF8, DN100, PN16, Lug Ends
This pneumatic knife gate valve features a 100 mm (4 inch) stainless steel ASTM A351 CF8 body with DN100, PN16 ratings. The bidirectional design ensures flow flexibility in both directions, while the lug ends allow for easy installation and removal from pipelines without disrupting adjacent equipment....
Bidirectional Knife Gate Valve
ASTM A216 WCB Knife Gate Valve, DN450, PN10, Lug, Bevel Gear
This knife gate valve is built from ASTM A216 WCB carbon steel and features a VITON seat for reliable sealing. It measures 450 mm (18 inch) with a DN450, PN10 rating. The valve is bidirectional and includes a bevel gear operator. The lug-style body allows for easy installation and maintenance in pipeline...
Bidirectional Knife Gate Valve
Carbon Steel Knife Gate Valve, A216 WCB, 4 Inch, 150 LB, Lug
The ASTM A216 WCB Knife Gate Valve is a 100 mm manual shutoff valve built for general industrial service. Its carbon steel body offers strength and durability at a competitive cost. The VITON seat provides reliable sealing and chemical resistance. This 4-inch valve is rated for Class 150 LB pressure....
Bidirectional Knife Gate Valve
ASTM A351 CF8M Knife Gate Valve, DN150, PN16, VITON Seat, Lug
The ASTM A351 CF8M Knife Gate Valve is a 150 mm bidirectional stainless steel valve designed for reliable shutoff in demanding industrial applications. Its CF8M body provides excellent corrosion resistance, while the VITON seat ensures tight sealing across a wide temperature range. This DN150 (6-inch)...
Bidirectional Knife Gate Valve
Rubber Lined Knife Gate Valve, A216 WCB, DN150, PN10, Wafer
The Rubber Lined Knife Gate Valve Factory produces a bidirectional knife gate valve designed for versatile applications. This valve features an ASTM A216 WCB carbon steel body, offering strength and durability. With a DN150 (6 inches) size and rated at PN10 and Class 150 LB, it provides reliable performance...
Bidirectional Knife Gate Valve
Carbon Steel Knife Gate Valves, A216 WCB, DN450, PN10, Wafer
The Carbon Steel Knife Gate Valve from our factory is a high-quality bidirectional valve designed for reliable flow control. It features an ASTM A216 WCB body, ensuring durability and strength. With a DN450 (18 inches) diameter and a pressure rating of PN10 (Class 150 LB), this valve is well-suited...
Bidirectional Knife Gate Valve
Ductile Iron GGG40 Knife Gate Valves, DN300, PN10, Pneumatic
The Ductile Iron GGG40 Knife Gate Valve is a robust and versatile solution for bidirectional flow control. This valve features a 12-inch (DN300) diameter and a pressure rating of PN10 (Class 150 LB), making it suitable for various industrial applications. Its wafer ends design allows for easy installation...
Bidirectional Knife Gate Valve
On this page
- The two-piece knife gate valve is named after its valve body, which adopts a two-piece split construction.
- The main body of the two-piece knife gate valve uses a symmetrical casting structure. Compared with the traditional integrated knife gate valve, its valve body is thicker and stronger. Both internal and external surfaces are precisely machined using CNC high-precision equipment, ensuring improved dimensional accuracy and sealing performance. The valve also offers enhanced resistance to media erosion, with a smoother and more aesthetically refined appearance.
- The valve body adopts a full-bore design. The internal chamber is equipped with a properly designed sloped diversion and flushing port structure, which effectively improves flow smoothness through the valve passage. This design also helps prevent sealing leakage caused by improper closure in traditional integrated knife gate valves.
- The unique bi-directional sealing structure enables pressure retention in both directions without jamming, leakage, or erosion. This significantly improves the service life of the valve, and its pressure-bearing capacity exceeds standard requirements.
- The two-piece knife gate valve is particularly suitable for demanding working conditions, including media such as slurry, slag, and mineral powder. It performs well in high-scouring environments, applications requiring high sealing performance, harsh operating conditions, and services demanding strong wear and corrosion resistance.
- The valve seat adopts a U-shaped integrated hot-molded rubber sealing ring structure. It features higher material density, excellent resilience, and superior resistance to wear, water, oil, and erosion.
- The rubber valve seat is embedded within the valve chamber flow channel and is fully enclosed by the valve body. As a result, more than 95% of its surface area is protected from direct media erosion, significantly extending service life and maintaining reliable sealing performance.
- The rubber sealing contact surface of the U-shaped valve seat is designed with a convex V-shaped structure. This reduces the contact area with the medium and gate plate, effectively improving valve seat life and resolving issues such as high operating torque, excessive thrust, and difficult opening and closing.
- The sealing structure in the central channel of the valve seat rubber adopts a concave U-shaped design, which further reduces contact with the gate plate, providing lower operating torque, better resilience, and stronger sealing performance. An optional needle-type rubber injection port can also be provided, allowing external sealant injection to restore sealing performance after wear.
- An arc-shaped scraper structure is designed between the valve seat and valve body. When combined with PTFE sealing, it effectively removes adhesive media from the gate plate surface, thereby improving overall valve seat service life.
