A parallel slide gate valve is a kind of valve. It is designed to transmit flow through a piping system. Unlike other gate valves, this type is easy to install and requires little space along the pipe axis.
This valve is used in the chemical industry, petroleum industry, and natural gas industry. Usually, these valves are forged, but they can also be cast. They are made of hardened metals and are suitable for both on-and-off fluid flow applications.
These valves have high durability and are very simple to clean. However, they need to be opened and closed carefully. Because of the nature of the sealing mechanism, it is important to make sure that the seat is seated properly. If the seat deforms, the pressure from the fluid may cause a leak.
Parallel slide gate valves are very easy to operate. They can be operated by handwheel, pneumatic actuators, or electric motors. Using the handwheel, the operator applies torque to the stem.
As a result, the valve’s operating characteristics are similar to other gate valves. This is because the valve operates with low energy, which makes the pumping process more efficient.
There are many advantages of using a parallel slide gate valve. One of the most significant is its ability to seal over an entire surface. Another advantage is its ability to be made fire safe.
How Does a Parallel Slide Gate Valve Work?
Parallel slide gate valves are used to control the flow of liquids in piping systems. They provide isolation of a piping system and are commonly used in chemical and power generation industries. The valves can be driven by pneumatic or electric motors. Their compact design makes them suitable for use in pipelines.
The valve is designed to maintain its seal under both high and low-pressure conditions. It is also suitable for service under very high temperatures. An anti-static design is also provided. A flexible graphite gasket is also used for a fire-safe design.
The springs on the valve keep the upstream and downstream seating in sliding contact. This reduces operating torque. When the pressure is relieved, the valve seat automatically resets. In this way, sealing is achieved over the entire surface.
There are several kinds of parallel slide gate valves. Some are double-disc wedge gate valves. These depend on torque force to wedge the disc into the valve body. Another type of valve uses a single disc that is supported by a spring.
Parallel-slide gate valves are compact and easy to install. Their elongated stem prevents thermal deformation and ensures strong sealing. With their wide flat seating, they minimize the effect of minor damages on the surface.
Parallel slide gate valves are often used for applications requiring high differential pressure. However, they are not recommended for service under hazardous conditions.
Parallel Slide Gate Valve Applications
A parallel slide gate valve is a type of valve used to control fluid flow in a piping system. The valve is made of two discs that are connected through a stem. It is mainly used for regulating fluid flow in oil and gas applications. These types of valves are easy to disassemble, clean, and repair.
A parallel slide gate valve can be driven by an electric motor or a handwheel. Normally, the handwheel is placed above the stem.
The valve can be operated manually, pneumatically, or electro-hydraulically. Typical parallel slide gate valve applications include natural gas, petroleum, and chemical industries.
Xintai Valve is one of the leading manufacturers of industrial valves. It is known for its Oxygen, Control, and Gate valves. Founded in 1998, Xintai Valve has developed several different ranges of valves, including swing check, parallel, gate, control, oxygen, hydraulic, thread, diaphragm, and cryogenic valves. All of these valves are available with the option of a manual, pneumatic, or electric actuator.