Half-stem Design Butterfly Valve

Half-stem Design Butterfly Valve just have one difference with the other regular butterfly valve, it stems have two stages, also can call as split valve shaft, it means cross-section reduction and put more importance on KV value. If you are looking for these kinds valve for your industry or projects, the half stem butterfly valve is a good choice, every single part material and top flange or shape of stem, it all can be customized.

Performance Benefits and Applicable Boundaries

1. Economical and easy to maintain:

The manufacturing cost of the Half Stem Butterfly Valve is only 70% of that of a full stem butterfly valve, and there is no need to maintain the bottom stuffing box;

2. Optimization for low-voltage scenarios:

Working pressure≤ PN16, applicable temperature -10°C~120°C (EPDM seal) / -20°C~80°C (NBR seal);

The Cv value of the flow coefficient is 40% higher than that of the gate valve of the same diameter, and the pressure loss is ≤ 0.2 bar (at a flow rate of 2 m/s).

3. Installation Flexibility:

Half Stem Butterfly Valve can be installed horizontally or vertically, and the valve body can be selected in cast iron (GGG50) or stainless steel (CF8M);

Adaptation of clip-on design to pipeline renovation projects with limited space (e.g., equipment room pipeline expansion).

4. Typical Media Compatibility:

a. Clean water, circulating cooling water, low-pressure steam (≤1.6MPa);

b. b.Neutral oils (viscosity ≤220cSt), air and other non-corrosive gases;

c. c.Low concentration of acidic and alkaline liquids (pH 5~9)