API gate valves refer to the valves which are made under the regulations set by the American Petroleum Institute. They are usually widely used in petroleum and industrial processing plants, playing an important role at shutting off the flow. And it is true that the featured and core part of them is called the wedge. In order to meet the various specifications, API gate valves are indeed designed and manufactured in multiple sizes, ratings, and materials. No matter what, the main components for these mechanisms are in common. They are the valve gate, valve body, valve bonnet, valve stem and valve seat.

The part connected with the valve body is called the valve stem. It is designed to handle the operation of an API gate valves. The turn of the valve stem determines the up and down of the wedge, leading to the control of the flow.

Referring to the valve seat, it means the sealing surface in a API gate valve. From the consideration of reliable performance and long service life, this part is generally made of forged steel. Once it is with some fabrication, it is necessary to repair it immediately, even replace it if necessary.

Sealing products are critical for both valve stem and valve seat. Seals contribute to the overall performance of industrial operations. They serve the vital task of keeping oil and liquids in while keeping contaminants out.

JST’s valve stem seals and seat seals are built to meet the American Petroleum Institute’s high standards for design, materials, function and performance. At the meanwhile, we have conducted the PR2 test to the gate valves with JST’s seals installed. Besides, JST’s PTFE and PEEK materials have passed the Norsok M710 H2S immersion test. Contact us with your detailed requirements and share with us gate valve groove dimension, working pressure, temperature, chemicals, we would give you our best solutions.