Gate Valve

Gate valve is a kind of valve to control the fluid, it is widely used in the industry. The gate valve controls the flow of fluid by controlling the opening and closing of the valve. Gate valve according to different principles and structure, can be divided into non-rising stem gate valve and rising stem gate valve. TWS Valve Mainly for customers to provide customers with high quality soft sealing dark bar, open rod gate valve.
NRS gate valves and OS&Y gate valves are two common valve types. The OS&Y gate valve is a valve that controls the opening and closing by manual or electric operation, while the NRS gate valve controls the opening and closing by rotating the hand whee. The operation of the OS&Y gate valve is more intuitive, and the NRS gate valve needs to be realized through a certain operation mode.
The following is the difference between the OS&Y and the NRS gate valve.
The stem of the OS&Y gate valve is exposed, while the NRS gate valve stem is in the valve body.
The OS&Y gate valve is driven by the thread of the valve stem and the steering wheel, so as to drive the gate plate to rise and fall. The NRS gate valve is through the valve stem at the fixed point to drive the gate up and down, in the switch, the steering wheel and the valve stem are connected together relatively motionless.
The transmission thread of the NRS gate valve is located inside the valve body. During the process of opening and closing of the valve, the valve stem only rotates in place, and the opening and closing state of the valve cannot be judged by the naked eye. The transmission thread on the valve bar is exposed outside the valve body, which can intuitively judge the opening and position of the gate.
The height size of the NRS gate valve is small, and the installation space is relatively small. The height of the OS&Y gate valve is relatively large when it is fully opened, which requires a large installation space.
The stem of the valve is outside the body for maintenance and lubrication. The stem thread of the valve is inside the valve body, so the maintenance and lubrication is difficult, and the valve stem is susceptible to direct erosion by the medium, and the valve is easy to be damaged. In the scope of use, the OS&Y gate valve is more extensive.
The advantages of theOS&Y gate valve are its simple structure, easy maintenance and operation, and it can control the opening and closing of the valve by manual or electric operation. The disadvantage is that the manual operation may have the problem of inconvenient operation, and easy to jam phenomenon.
The advantage of the NRS gate valve is easy to operate and can control the opening and closing of the valve by rotating the hand wheel. The disadvantage is that the structure is more complex, maintenance and maintenance is more difficult, and prone to failure. When choosing the OS&Y gate valve or the NRS gate valve, we need to consider their own actual needs and use environment.

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