Non-Rising Stem Gate Valve

Product Introduction

‌Gate( IS&Y Inside Screw and Yoke) is a common type of valve widely applied in various fluid pipeline systems. It is characterized by the fact that the valve stem is not exposed to the outside, and the valve is opened and closed through rotation or lifting operations. Therefore, it is also known as a non-rising stem gate valve or a rotary stem gate valve.‌

Product Advantages

1. Non-rising stem gate valves are usually made of cast iron, cast steel, stainless steel and other materials, which have high strength and corrosion resistance.

2. A soft seal or metal seal is used between the gate plate and the valve seat of the non-rising stem gate valve. This sealing method has superior performance and can effectively prevent medium leakage and ensure the safety and stability of the system‌.

3.Because the valve stem is hidden inside, the interference of external factors on the valve stem is reduced, and the service life of the valve is further extended.

4. Non-rising stem gate valves mainly include wedge type gate valves, flexible gate valves, ductile iron gate valves, rotary stem gate valves, stainless steel non-rising stem gate valves, and rubber-sealed non-rising stem gate valves.

• The non-rising stem gate valve drives the gate to move in the valve seat by rotating or lifting the valve stem, thereby realizing the opening and closing of the valve. When the valve stem is rotated or raised or lowered, the gate moves with it, causing the valve passage to open or close. Due to the metal seal between the valve clack and the valve seat, then it has better sealing performance‌.

• The valve stem and nut of the non-rising stem gate valve are hidden inside the valve body and are in direct contact with the flowing medium. This design prevents the valve stem from being damaged by the external environment, such as corrosion or physical damage, thus significantly enhancing its durability. In addition, the flow path diameter of the non-rising stem gate valve is consistent with the pipe diameter, which reduces the flow resistance, lowers the pressure loss of the fluid and improves the efficiency of the system‌.

Non-Rising Stem gate valve

1) Design Standard: GB/T12234

2) End Flange: ASME B16.5.JB79,GB9113

3) Size: 2"-24"

4) Pressure: 125~150LB

5) Temperature: 80℃

6) Materials: Carbon steel,Stainless steel

7) Suitable Medium: Water,Oil,Gas

Q1: Is there a difference between a non-rising stem gate valve and a rising stem gate valve?

A1: The valve stem of the rising stem gate valve is exposed, and the valve plate is lifted or lowered through thread transmission; The valve stem of the non-rising stem gate valve is not exposed, and the valve plate is lifted by rotating. The rising stem gate valve lifts or lowers the valve plate by rotating the handwheel, making the operation intuitive; While the non-rising stem gate valve drives the valve plate to lift by rotating motion, and the operation is relatively hidden‌.