What is resilient seated gate valve?
Resilient seat gate valves are gate valves with an elastomer lined wedge. They are especially used for waste water, drinking water supply and irrigation.
What is a seated gate valve?
AVK metal seated wedge gate valves are primarily designed for the flow isolation of a length of pipeline or piece of equipment. It uses a ductile iron gate that houses bronze rings to ensure a watertight seal.
What does NRS gate valve mean?
NRS means Non-Rising Stem. OS&Y means Outside Stem and Yoke. In an NRS valve, the stem will turn to open and close the gate, but the stem does not move up or down as it turns. With a OS&Y valve, as the stem turns, it moves into or out of the valve, which also moves the gate to open or seal the valve.
What is the difference between resilient seated and metal seated valves?
A resilient seated butterfly valve is used in average temperatures. While a Metal seated butterfly valve is used in low, normal, and high temperatures.
What are the different types of gate valves?
Gate valves are available in different types, such as slab, expanding and wedge. Wedge gate valves have a sealing element in the shape of a wedge. A wedge gate valve is a torque seated valve, meaning that the wedge is expanded from both sides due to the stem force and provides sealing.
What is an OS&Y gate valve?
One type of valve commonly used to control water flow to fire sprinkler systems is known as an OS&Y gate valve. OS&Y means “outside stem and yoke” or “outside screw and yoke”. OS&Y gate valves operate by opening and closing via a gate, which lowers into or rises out of the valve.
What is the difference between globe valve and gate valve?
Gate valves have little pressure drop across the valve and provide little resistance to the media flow in the open position. Globe valves, on the other hand, provide substantial resistance to the flow of the fluid and have high pressure drops.
What does OS & Y mean?
outside screw and yoke
One type of valve commonly used to control water flow to fire sprinkler systems is known as an OS&Y gate valve. OS&Y means “outside stem and yoke” or “outside screw and yoke”.
What are the advantages and disadvantages of gate valve?
In general, gate valves cannot be used for regulating flow rate. It can be used for low temperature low pressure or high temperature high pressure, and can be used according to the different material of the valve. However, gate valves are generally not used for conveying mud and other media in the pipeline.