What is a knife gate valve used for?
A knife gate valve is a component that utilizes a blade to cut through clogging of heavy liquids; whereas a slide gate valve is a component utilizing a slide plate in order to better manipulate or control the flow of dry bulk material. Knife gate valves were originally designed for use in the pulp and paper industry.
When would you use a knife gate valve?
Knife gate valves should only be used for applications requiring a completely open or completely closed position and should not be used to regulate flow unless they are designed for it. Whenever fluid is forced against a partially closed gate, there will be a vibration, gradually eroding the disc and seat.
How does a knife gate work?
A knife gate valve works by allowing thick media to easily flow over soft seals with no interference. They work by chopping up the media as it passes through the valve. Due to this, knife gate valves have low-pressure limitations and are designed to seat the blade into a soft seal with no disruption.
Is standard for knife gate valve?
The Knife Gate Valve provides reliable shut-off in both dry and wet lines….Knife Gate Valves.
| Size | 2″ to 60″ (50 mm to 1500 mm) |
|---|---|
| ASME Class | PN 10, PN6 and Class 150 |
| Design Standard | MSS SP 81 |
What is difference between knife gate valve and gate valve?
A gate valve will have a v-ring packing set that seals the shaft attached to the gate, while a knife gate valve has a packing gland that seals around the gate. A knife gate has a very thin profile compared to its bulkier counterpart.
What is sluice gate valve?
A gate valve, also known as a sluice valve, is a valve that opens by lifting a barrier (gate) out of the path of the fluid. Gate valves require very little space along the pipe axis and hardly restrict the flow of fluid when the gate is fully opened.
How do you know if a gate valve is open or closed?
As the operator rotates the handle counterclockwise, the stem lifts out of the handle, opening the gate. A clockwise rotation of the gate moves the stem back into the gate and closes the valve. When the stem is no longer protruding beyond the handle, the gate valve is closed.
Who manufactures knife gate valves?
Keckley manufactures knife gate valves for applications such as pulp and paper, chemical, petrochemical , power, mining, waste water and more.
What’s the difference between a knife gate and a slide gate?
A knife gate valve is a component that utilizes a blade to cut through clogging of heavy liquids; whereas a slide gate valve is a component utilizing a slide plate in order to better manipulate or control the flow of dry bulk material. Knife Gates are to cut through thick liquids and gases
What is the difference between gate valve and ball valve?
The main difference between ball valves and gate valves are structural qualities and how they are marked . While gate valves open by lifting a round or rectangular gate out of the path of the fluid, ball valves have a stem and a ball that turn horizontally. This is why ball valves are often referred to as a rotational valve. Gate valves feature a sealing surface dividing the gate and the seats. As such, they are often used when a straight-line flow of fluid and minimum restriction is required.
What is a knife valve?
A knife gate valve is a component that utilizes a blade to cut through clogging of heavy liquids. These valves were designed to work in some of the most corrosive, erosive and abrasive environments in the world. Knife gate valves were originally designed for the pulp and paper industry.