Cast Steel Pneumatic Lined Diaphragm Valve G641J-16C

G641JPneumatic Lined Diaphragm ValveOpening and closing are achieved by the pneumatic actuator driving the up-and-down movement of the valve stem.When the valve stem is in the upper position, the spherical diaphragm bends upward, opening the valve to allow flow. As the valve stem moves downward, it drives the plug to bend the diaphragm, forcing it to seal tightly against the seat area and close the fluid passageway. Designed for controlling corrosive or mildly corrosive media, the valve body interior features either an unlined surface or optional rubber linings, suitable for various operating temperatures and fluid pipelines.

Working Principle

The valve closes when pressurized and opens when depressurized. Opening and closing are achieved by the pneumatic actuator driving the valve stem's vertical movement. When the valve stem is in the upper position, the spherical diaphragm bends upward, forming a conductive state. When the valve stem moves downward, it drives the valve plug to bend the diaphragm, forcing it to tightly seal against the valve seat area, thereby closing the pipeline fluid passage.

Product Features

• The diaphragm is replaceable, resulting in low maintenance costs.

• There is no stuffing box, so there is no external leakage.

• The streamlined flow path minimizes pressure loss.

• The elastic seal's opening and closing mechanism ensures no internal leakage.
• The fluid passage is straight, resulting in lower fluid loss and reduced wear.
• The valve body and cover are separated by an intermediate diaphragm, ensuring that components above the diaphragm—such as the valve cover and stem—remain protected from media corrosion.
• The sealing element is a resilient rubber diaphragm. Therefore, it also provides excellent sealing performance and minimal closing force.
• Vision GelDiaphragm valveThe inner surface of the valve body is lined with a variety of rubber options. This provides excellent corrosion resistance.

Product Parameters

Product Size Reference