Specialityvalve has been the greatest Knife gate valve manufacturer in India. A knife gate valve is like a gate valve. It works by lifting a plate with the knife edge from the path of flow that can cut through various obstacles during closing and create complete closure against a soft sealing surface. The soft sealing surfaces generally dictate use in low pressure systems rather than designed to handle high pressure. Both knife and gate valves are primarily designed for isolation or on/off service rather than a partial flow application.
Knife gate valves are linear valves in which the closing layer is a gate that is sharpened to better cut through the process media like slurry. The gate is attached to a stem and travels inside the body in which scrappers are often included to clean the gate as it moves from open to closed. It can be manual or automated and are very less versatile and can be used in both isolation and applications.
Gate Valve is a valve that opens by lifting a barrier out of a path of a fluid. It is designed with a fully open or closed service. Operation of a gate valve is performed either clockwise to open or clockwise to close. The gate moves up or down on the threaded part of the stem. Gate valves should not be used for the regulation of flow because accurate control is not possible.
Types of Knife Gate Valve:
· Unidirectional Knife Gate Valve
· Bidirectional Knife Gate Valve
Industries of Knife Gate Valve:
· Chemical industry
· Refineries
· Mining and Mineral process
· Power Plant
· Cement Industry
The difference between the knife gate valve and gate valve:
Knife valve:
1)It has a packing gland to seal around the gate.
2)Knife valves are uni-directional
3)It is cost friendly compared to its counterpart
4)Its seats come in metal to resilient types
Gate Valve:
1)It has a v-ring packing set to seal the shaft attached to the gate.
2)Gate valves are bi-directional
3)It is an expensive option compared to its counterpart
4)It is only available with metal seats
Advantages of knife gate valve:
· It has Low Fluid Resistance
· It provides Superior Sealing Performance
· Easy to maintain and low-cost installation
· It is lightweight which makes them easy to transport
· It is easy to install
Disadvantages of knife gate valve:
· It opens & closes Slowly
· It can be Prone to Scratches
· Knife gate valves do have low-pressure limitations.
Description
Available materials- SS306, SS904, SS316, Aluminium Bronze, Monel, Bronze, Brass, Duplex steel, Inconel, Titanium, WCB, CF8, CF8M, CF3, CF3M, WC1, WC6, WC9, Cast iron
Size- 1/2″- 64”
Class-150 to 2500
Nominal Pressure- PN10 to PN450
Operation- Hand Wheel, Gear operated, Electric and Pneumatic Actuated
Ends-Flanged, Buttweld, Socket weld, Threaded
Standards ASME, API6D, API607, DIN, BS, ANSI, AWWA
https://www.specialityvalve.com/product-category/knife-gate-valve/
Rising Stem Gate Valve Manufacturer in India :
Specialityvalve is the dominant Rising Stem Gate Valve Manufacturer in India. The Gate valve serves to start or stop flow rather than to regulate it. A rising stem is a type of valve mechanism in which the stem of the valve rises along with the gate, disk, or globe when open. This gives a good visual indication of whether the valve is open or not because the raised stem is visible.
The valve is completely detached from the flow path in the open position, which minimizes pressure drop. But when in a closed position there is no flow and no pressure drop. This feature makes it an isolation application, especially in large-diameter and high-pressure lines. It has its thread external to the valve body. When the handwheel is rotated, it drives the nut within the bonnet, leading to the raising or lowering of the stem.
The location of the valve is made easy as the rising stem is always up when open and down when closed. A larger installation height is needed for this valve design relative to the non-rising design. Rising stem gate valves may feature stable handles or wheels in which the stem rises out of the center of the handle or handles when opened or which rise with the stem.
Advantages of Rising Stem Gate Valve
· Easy to open and close
· The sealing surface is easy to be eroded and scraped
· Small fluid resistance
· Very corossion resistant
· Available in large size
Industries of Rising Stem Gate Valve
1)Chemical industry.
2)Mining.
3)Water treatment system.
4)Power engineering
Available materials: Cast iron, Cast steel (WCB, WCC, LCB, LCC, WC6, WC9), Ductile iron, SS304, SS316
Class:150 to 2500, PN10 to PN 450
Size:1/2’’-48’’
Ends: Flanged, Socket Weld, Butt Weld, Threaded.
Operation: Handwheel, Gear, Pneumatic, Electric.
Specialityvalve is the predominant Rising Stem Gate Valve Manufacturer in India which is known for its rich features such as optimum quality and longer serving life. We are a leading manufacturer that always looks ahead and our innovative character has been key to developing a high-quality product and service which we provide to clients.
https://www.specialityvalve.com/product-category/rising-stem-gate-valve/