C30L
Self-Operated Flow Control Valve
Design Features
The C30L is a self-actuated flow control valve. It holds a set flow rate using nothing but the energy already in the line — no power supply, no instrument air, no controller, no actuator mounted on top. The valve contains both the sensing element and the adjusting mechanism: the sensing element reads the flow, the mechanism moves the trim, and the opening adjusts until the flow matches the set value again. When supply pressure rises or a neighboring branch changes, the flow through this valve stays where it was set.
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| Product Name | Self-actuated flow control valve |
| Product Model | C30L |
| Nominal size | NPS 1/2"–10" (DN15–DN250) |
| Pressure class | Class 150–Class 300 (PN16–PN50) |
| Body material | Carbon steel (A), 304 stainless steel (S), 316 stainless steel (L) |
| Seat / seal material | PTFE, metal-to-metal (hard seat), hard alloy |
| Leakage class | ANSI Class IV |
| Media temperature | −42 °C to +200 °C (−44 °F to +392 °F) |
| Connection | Flanged |
| Trim type | Self-actuated flow control valve |
| Control accuracy | ±0.1% as published |
| Actuation | Self-actuated, no external energy source |
| Rated flow coefficient KvS | 4; 6.3; 8; 16; 20; 32; 50; 80; 125; 160; 280; 320; 400 |
| Remarks | Other special sealing materials or special temperature requirements can also be designed and selected according to customer specifications. |