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Fakai Valve Factory Site: Yongxing Industrial Zone, Longwan District, Wenzhou City Tel: 0577-88767789
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Slow closing check valve

365bet足球投注网 - Check valve - Slow check valve

LH45X Flow Limit Check Valve

LH45X Flow Limiting Check Valve Structure
LH45X Flow Limiting Check Valve Structure

LH45X current-limiting check valve is installed at the outlet of the pump. When a single pump is started and a non-full design working number is designed, the working pump will limit the flow of the working pump and make the pump work at a higher efficiency. Overload occurs at head, large flow rate, and low efficiency; it prevents the phenomenon of over-rated current from burning the motor, which has a significant energy saving effect. The valve adopts a pilot-main valve structure, which is compact in structure and light in weight. The valve function is completely equivalent to a micro-resistance slow-closing check valve without closing noise and zero backflow.

working principle

  1. According to the design working condition of the pump, the lift head : the pilot valve automatically detects and controls the actual working head of the pump to limit the working flow of the pump and the load of the motor. This valve sets a control working gas head. When the pump working head is lower than the control head, the valve will close the valve, which will increase the actual working head.
  2. When the pump working head is greater than the set head, the valve is fully open : the valve resistance is extremely small. The setting of the control gas lift can be set according to the rated current of the motor, or it can also be set according to the high-efficiency working conditions. The valve working head setting is adjustable. Generally, the factory setting is the design working head.

Part material

Part Name Material
Body and bonnet Cast iron, cast steel, stainless steel
Valve stem Chrome stainless steel
Disc Carbon steel, stainless steel + nitrile rubber
O-ring Nitrile rubber

Dimension table

Nominal diameter Size (mm)
DN (m) L A1 A H1 H F
20 150 200 282 106 172 116
25 160 200 282 106 172 116
32 180 200 282 106 172 116
40 200 210 320 137 225 168
50 203 210 320 137 225 168
65 216 215 330 145 270 180
80 241 220 330 178 289 210
100 270 230 410 232 375 284
125 292 245 420 286 420 310
150 330 260 420 318 450 370
200 400 280 430 413 722 463
250 480 300 450 502 769 525
300 550 320 460 600 906 625
350 622 340 470 638 1480 705
400 685 360 480 677 1027 778
450 750 360 480 677 1027 778
500 811 410 780 750 1110 690
600 935 456 888 850 1286 785