Straight stroke valve

Straight stroke valve

1. Straight through single seat valve

The so-called single seat means that there is only one spool and one seat in the valve body. It is characterized by simple structure, small leakage (even can be completely cut off) and small allowable pressure difference. Therefore, it is suitable for the occasion of clean medium with small leakage and working pressure difference. In the application, special attention should be paid to the allowable pressure difference to prevent the valve from closing.

2. Straight through double seat valve

There are two spool and valve seat in the valve body of straight through double seat regulating valve. Compared with the single seat valve with the same diameter, its flow capacity is about 20% - 25% larger. Because the force of fluid on the upper and lower valve cores can cancel each other, but the upper and lower valve cores are not easy to close at the same time, so the double seat valve has the characteristics of large allowable pressure difference and large leakage. Therefore, it is suitable for clean medium occasions with large pressure difference at both ends of the valve and low leakage requirement, and is not suitable for occasions with high viscosity and fiber.

3. Angle valve

The valve body of the angle control valve is rectangular, with simple flow path and small force. It is suitable for controlling the flow of high pressure difference, high viscosity, suspended solids and granular materials. Generally used in the bottom in side out, this kind of control valve has good stability. In order to prolong the service life of the valve core under high pressure, side in and bottom out can be used, but it is easy to oscillate when the opening is small.