SLOW-CLOSING CHECK VALVE EN300X
A. SLOW-CLOSING CHECK VALVE Structure and Purpose
Used on the pump outlet of a water supply system to prevent medium's back-flow, water hammer and water shock. It has three functions as an electric valve, check valve and water hammer remover. It is capable of improving the safety and reliability of the water supply system effectively through integrating the technical principle of slow-open, speed valve, slow-close, and removing water hammer and preventing of both pump-starting and pump-stopping water hammer. The gate can carry out open-close automatically upon the operation rules of the water pump just by operating the pump to open or close electrically. EN300X Slow-Closing Check Valves features by the big flow and small pressure loss, reliable sealing performance, easy installation, debugging and maintenance and long duration.

B. SLOW-CLOSING CHECK VALVE Brief Figure of Structure
SLOW-CLOSING CHECK VALVE EN300X
SLOW-CLOSING CHECK VALVE EN300X
SLOW-CLOSING CHECK VALVE EN300X
SLOW-CLOSING CHECK VALVE EN300X
1. Needle Valve 2. Check Valve 3. Small Ball Valve
< DN 450 Diaphragm type valve
1. Strainer 2. Ball Valve 3. Check Valve 4. Needle Valve
= DN 500 piston type valve

C. SLOW-CLOSING CHECK VALVE External and Connection Dimensions
H142X HYDRAULIC WATER LEVEL CONTROL VALVE

D. SLOW-CLOSING CHECK VALVE Schematic Diagram of Installation
DN(mm) 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500 600 700 800
L 180 180 180 203 203 235 285 360 400 455 585 650 800 860 915 980 1075 1230 1300 1450
PN10 D 105 115 135 145 160 180 195 215 245 280 335 390 440 500 565 615 670 780 895 1010
D1 75 85 100 110 125 145 160 180 210 240 295 350 400 460 515 565 620 725 840 950
PN16 D 105 115 135 145 160 180 195 215 245 280 335 405 460 520 580 640 705 840 910 1020
D1 75 85 100 110 125 145 160 180 210 240 295 355 410 470 525 585 650 770 840 950
PN25 D 105 110 135 145 160 180 195 230 270 300 360 425 485 550 610 660 730 840 955 1070
D1 75 85 100 110 125 145 160 190 220 250 310 370 430 490 550 600 660 770 875 990
H 172 172 172 265 265 310 350 460 520 570 695 780 905 1025 1080 1030 1135 1270 1460 1640
H1 106 106 106 210 210 215 245 305 365 415 510 560 658 696 735 610 665 725 865 925
Note: Either elastic seat ring sealed gate valve or butterfly valve can be selected in the schematic of installation. Recommend to select the butterfly valves in case of =DN350

E. SLOW-CLOSING CHECK VALVE Main Technical Features
Nominal Pressure 1.0MPa 1.6MPa 2.5MPa
Shell test pressure 1.5MPa 2.4MPa 3.75MPa
Sealed test pressure 1.1MPa 1.76MPa 2.75MPa
Suitable temperature ≤80℃
Suitable medium water

The technical data subject to amend without notice