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300X(HH741X) slow closing check valve

300X(HH741X) slow closing check valve

Product introduction: Model 300X slow closing check valve is composed of main valve, check valve, needle valve, ball valve, micro filter and pressure gauge. Using hydraulic automatic operation, the main valve can get the best opening and closing speed. To prevent the water hammer from hitting, in order to achieve the effect of slow closing and silencing.

  • Item NO.:

    XUVAL77-21
  • Lead Time:

    45Days
  • Product Orgin:

    CHINA
  • Brand:

    XUVAL
  • Shipping Port:

    Shanghai
  • Payment:

    100%TT
  • Color:

    blue
  • MOQ:

    10
Products Details

300X(HH741X) slow closing check valve

Product introduction:

Model 300X slow closing check valve is composed of main valve, check valve, needle valve, ball valve, micro filter and pressure gauge. Using hydraulic automatic operation, the main valve can get the best opening and closing speed. To prevent the water hammer from hitting, in order to achieve the effect of slow closing and silencing.


Performance parameters:
Nominal diameter of 300X slow closing check valve: DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500, DN600, etc.
300X slow closing check valve nominal pressure size: PN10, PN16 and PN25.


Working principle:

When the valve supplies water from the inlet end, the water enters the main valve control room through the micro filter, needle valve and one-way valve, and then discharges to the downstream through the ball valve. Because the opening of the needle valve is less than that of the ball valve, that is, the drainage speed of the main valve control room is greater than that of the water inlet, the pressure in the control room is reduced, and the inlet pressure acting on the lower end of the main valve disc opens the main valve to supply water to the downstream. When the pipeline stops supplying water, if the downstream water begins to flow back, a part of the return water will enter the main control room through the ball valve. Due to the action of the one-way valve, the return water can not flow out from the main control room, causing the main control room leakage.


Structure diagram:

Note: 1 for needle valve, 2 for check valve, 3 for small ball valve.


Installation diagram:


Main dimensions:

DN 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
50 220 210 320 137 225 168
65 240 215 330 145 270 180
80 260 220 330 178 289 210
100 295 230 410 232 375 284
125 330 245 420 286 420 310
150 350 260 420 318 450 370
200 400 280 430 413 722 463
250 475 300 450 502 769 525
300 550 320 460 600 906 625
350 620 340 470 628 1480 705
400 700 360 480 677 1027 778
450 750 360 480 677 1027 778
500 800 410 780 750 1110 690
600 900 456 888 850 1286 785


Packing & Delivery : 

Packing Details:all by seaworthy plywood case and packed strongly by packing belt as below

Delivery Details:Generally it is 5-10 days if the goods are in stock. or15-30 days if the goods are OEM or not

enough subject to the order quantity. But anyway, normally, we are able to make sure the delivery will not exceed 45days.

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    If you are interested in our valves and want to know more details,please leave a message here,we will reply you as soon as we can.