What is the difference between check valve and orifice check valve?
What is the difference between check valve and orifice check valve?
When the gear is raised, the check valve allows full fluid flow to lift the heavy gear at maximum speed. When lowering the gear, the orifice in the check valve prevents the gear from violently dropping by restricting fluid flow out of the actuating cylinder.
What is an orifice on a valve?
An orifice valve is a flow control valve that is used to restrict or control the fluid flow. An orifice is a small opening or hole in a plate or pipe or body. When the fluid passes through the orifice, the fluid flow gets restricted.
What is the purpose of a check valve in a hydraulic system?
Check valves are the simplest form of hydraulic devices in that they permit free oil flow in one direction and block oil flow in the opposite direction. Check valves may also be used as a directional or pressure control in a hydraulic system.
What is a check valve good for?
When pressure changes in the piping cause flow reversal, check valves protect pumps and other equipment from damage caused by backflow. They are used in a wide variety of applications for flow control including, line isolation, priming pumps, media injection, maintaining head pressure, and many others.
What are the types of orifice?
Types of Orifice Plates Used in Flow Measurement
- Concentric Bore – The most common orifice plate is the square-edged, concentric bored design.
- Eccentric Bore – Eccentric bore orifice plates are plates with the orifice off-center, or eccentric, as opposed to concentric.
What type of check valve is best?
Lift Check Valves They have no external moving parts and are known to be economical and reliable. Over time, these types of valves can have high energy costs because the disc remains in the flow stream during operation. Silent check valves are known for their quiet closure. Flow pushes the disc to allow forward flow.
What are the parts of a check valve?
Construction of a Check Valve. A basic check valve consists of a valve body, bonnet or cover, and a disc which is attached to a hinge and swings away from the valve seat to allow fluid to flow in the forward direction, as in a swing- or tilting-disc check valve, and returns to valve seat when upstream flow is stopped.
What is a control valve orifice?
An orifice valve is a flow control valve that is used to restrict or control the fluid flow . An orifice is a small opening or hole in a plate or pipe or body. When the fluid passes through the orifice, the fluid flow gets restricted. An orifice valve usually finds its application in areas where custody transfer has to take place from one party to other party.
What is the function of a hydraulic check valve?
Hydraulic check valves are used to protect the heat exchanger and avoid overpressure when the heat exchanger is blocked.
How does excess flow check valves work?
Excess Flow valves or EFVs are designed by excess flow check valve manufacturers for a variety of industrial requirements. As the name suggests, an excess flow check valve closes only when the force of the liquid or gas passing through the valve exceeds the power of the spring holding it open .