Rubber lined weir type diaphragm valve specification:

Nominal diameter DN15-600mm

 Nominal pressure 0.6-1.6MPa  

Operating temperature ≤80℃

Drive mode manual, worm gear,pneumatic actuator and electric actuator.

Connection mode internal thread, flange

Manufacturing standards German DIN, American standard API, ANSI, British standard BS, Japanese JIS, JPI, etc

Body material:cast iron, cast steel, carbon steel, WCB, stainless steel, 304, 304L, 316, 316L, etc.

Rubber lined weir type diaphragm valve working principle:
Rubber lined weir type diaphragm valve operates by employing vertical linear motion. This motion is initiated by the application of torque on the handwheel. This torque makes both the handwheel and stem start rotating. The rotary motion is converted to linear motion by threads on the stem. Since the stem is connected to the compressor, as it starts moving it forces the compressor to move either up or down. To open the fluid flow through the valve, the handwheel is turned to the clockwise direction. This forces the diaphragm connected to the compressor upwards which opens a passage for the fluid flow. The fluid then keeps flowing until the handwheel is turned counterclockwise forcing the diaphragm to move downwards and creating a tight seal against the fluid flow. This then prevents any attempts of the fluid to flow through the valve. Weir-type diaphragm valve manufacturers also recommend these valves for use in throttling flow applications. For throttling flow, the handwheel is turned slightly allowing some amount of fluid to flow through the valve.