LH45X Flow Limiting Check Valve
Product Overview:
The LH45X Flow Limiting Check Valve is primarily used in multi-pump parallel applications, installed at the pump discharge outlet to restrict the operational flow of the pump and prevent backflow when the pump stops. This valve features a pilot and main valve design, offering a compact structure and relatively light weight. It ensures the pump operates within the high-efficiency zone, limits excessive flow and inefficient operation, and provides non-slam closure without water hammer during pump shutdown. Additionally, it prevents motor burnout due to pump overload exceeding the rated current. The check function of this valve is fully equivalent to a non-slam check valve, with no closing noise and zero backflow.

Product Application:
This valve is used in water supply pipelines to serve as a check valve.
Main Technical Parameters:
Applicable Media Applicable Temperature Connection Type Valve Body Material
Clean water, sewage, seawater 0-150°C Flange connection Cast iron, cast steel

Standard Specifications
Flange Dimensions Structure Length
GB4216.2 GB/T 12221

Main External Connection Dimensions
PN1.0-2.5 MPa
DN(mm) 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500 600
L 150 160 180 200 203 216 241 270 292 330 400 480 550 622 685 750 811 935
H1 106 106 106 137 137 145 178 232 286 318 413 502 600 638 677 677 750 850
H 172 172 172 225 225 270 289 375 420 350 722 769 906 1480 1027 1027 1110 1286