Key Features of Parallel Slide Gate Valves

The diversity of gate valves stems from the design of their internal structures, which are optimized for specific industrial applications. Among the many gate valve types, parallel slide gate valves are highly regarded for their efficient performance in controlling fluid flow. The valves are opened or closed by a straight line movement of the internal disc. Compared to traditional wedge gate valves, they show superior sealing and ease of operation in high pressure and high temperature environments, making them particularly suitable for applications such as steam and hot water.

The core feature of parallel slide gate valves is that they are equipped with two discs that are in parallel contact with the seat of the body. The flexible design of the disc allows it to adapt to temperature fluctuations in the pipeline without interfering with the normal operation of the valve. This design utilizes the pressure of the line to assist in sealing, ensuring a tight seal even under high pressure conditions.

During the operation of the valve, the sliding action of the disc on the seat surface not only realizes the opening and closing of the fluid, but also has the function of self-cleaning. This action helps remove any impurities and foreign bodies that may accumulate on the seat surface, thereby reducing the need for maintenance and increasing valve reliability and service life.

The Main Advantages of Parallel Sliding Gate Valves

Low Closing Torque Requirements

One of the design features of parallel sliding gate valves is the low closing torque required. This means that less force is required to operate these valves compared to traditional double disc wedge valves. Because this design can rely on the pressure of the line to secure the disc to the seat, it can provide a positive closing mechanism without leakage. This design can not only reduce the wear of the valve, but also extend the service life of the valve.

Cost-effective Operation

Due to the low torque requirements of parallel sliding gate valves, they can be operated with smaller actuators. This small size actuator not only costs less, but also operates more efficiently. Therefore, when choosing parallel sliding gate valves, not only can the initial investment cost be reduced, but also the long-term maintenance and operating costs can be reduced.

Wider Seat Surface

Another notable feature of the parallel sliding gate valve is its wide, flat seat surface. This design prevents the seat from deforming during operation, reducing the need for repairs and maintenance. At the same time, the wide seat surface also helps to reduce wear caused by frequent operation, further extending the service life of the valve.

Reduce Seat Wear

The parallel sliding gate valve seat design uses a large bearing area, and this uniform stress distribution helps reduce seat wear. This design can not only reduce the frequency of valve maintenance, but also improve the overall reliability and durability of the valve.

Stable Operation at High Temperature

The design of the seat ensures stable operation of the parallel sliding gate valve even under extreme temperature changes. In contrast to wedge gate valves, this design prevents disc displacement due to thermal expansion, thus ensuring valve sealing performance in high temperature environments.

Eliminate Heat Locking

The design of parallel sliding gate valve effectively avoids the problem of thermal locking. Thermal locking is a common problem in wedge gate valves, usually due to the valve getting stuck due to body contraction while cooling. By using parallel sliding gate valves, it is possible to ensure that the valve can operate normally during both cooling and heating, thus avoiding problems caused by thermal expansion.

Low Fluid Resistance

Parallel sliding gate valves are designed with low flow resistance, which is very important for industrial applications requiring high flow rates. Valves with lower pressure ratings are designed with full through-hole openings, while valves with higher pressure are designed with venturi through-holes, which help minimize pressure loss when fluid passes through the valve.

Excellent Sealing Performance

Parallel sliding gate valves provide excellent sealing performance, which is critical for pipelines carrying critical fluids. The valve provides a tight seal to any flow and maintains its tightness even at varying operating temperatures, ensuring safe and reliable fluid delivery.

Two-way Operation

The bidirectional operation of parallel sliding gate valves is another significant advantage. This valve can handle flow from any direction, eliminating the need for additional valves in pipes that flow in both directions. This flexibility makes parallel sliding gate valves highly applicable in a variety of industrial applications.

Sum up

Parallel slide gate valves offer many advantages over traditional wedge gate valves, making them an excellent choice for applications requiring high reliability, low maintenance and efficient operation. Its unique design and operational advantages ensure long-term performance and cost savings, making it the ideal solution for critical fluid management in industrial pipelines. Contact our experts to discuss your needs and find lasting solutions.