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  The main feature of piston type multi-function water pump control valve is to control the opening and closing of the main valve disc through the pressure difference between the upper and lower chambers by using the pressure of the pipe itself, so as to achieve the purpose from the surface. Piston type multifunctional pump control valve is an intelligent valve installed at the pump outlet of large diameter water supply network system to prevent the phenomenon of backflow of medium, water hammer and water hammer.
The working pressure of piston type multi-function water pump control valve is divided into six types: 1.0MPa, 1.6Mpa, 2.5MPa, 4.0Mpa, 6.4Mpa and 10.0MPa. The operating pressure is greater than or equal to 0.03mpa, the medium temperature is 0-80 ℃, the slow closing time can be adjusted within 3-120s, the pressure loss of pipeline flow rate of 2m / S is less than 0.01Mpa, and the peak value of water hammer is less than 1.5 times of working pressure
Working principle of piston type multifunctional water pump control valve
    The piston type multi-function pump control valve has three functions: electric valve, check valve and water hammer elimination, which can effectively improve the safety and reliability of the water supply system. The double chamber and double valve flap structure can make the valve quickly close 90% after the pump stops (prevent the reverse of the pump caused by the backflow medium), and then slowly close the remaining 10% (eliminating the destruction of water hammer) piston valve with reliable performance, high strength and dynamic It is stable and suitable for the occasion of starting and stopping water hammer. The valve can be opened and closed automatically according to the pump operation regulations by operating the pump motor open and close button, with large flow and small pressure loss.
Features and advantages
The piston type multi-function water pump control valve has the function of slow opening, which solves the traditional manual valve closing and pump starting.
The piston type multi-function water pump control valve has the function of slow closing, which can adjust the closing time manually to automatically realize slow closing and eliminate water hammer.
The piston type multi-function water pump control valve has good check function. The rubber sealing material with good elasticity and high wear resistance is used to ensure no water leakage after closing.
Piston type multi-function water pump control valve is sensitive and will not be out of control.
The piston type multi-function pump control valve does not need to be operated manually, and it works automatically in the whole process of pipe network operation.
The control valve of piston type multi-function water pump is easy to maintain, without the need to remove the valve from the whole pipe. In maintenance, find out the cause of failure, and only need local maintenance.
The inside and outside of the control valve of the piston type multi-function water pump and all the easily corroded parts are treated by electrostatic spraying, which will not rust in the sewage for a long time.
The piston type multi-function water pump control valve can be installed in the neutral position of the pipeline with the same performance.

It is installed in the pumping station of water intake, water delivery, pressurization, diving, sewage pump room and oil and chemical fluid transportation system in the fields of municipal administration, construction, iron and steel, metallurgy, petroleum, chemical industry, gas (natural gas), food, medicine, mine, power station, nuclear power, water conservancy and irrigation. It integrates the functions of electric valve, check valve and water hammer eliminator, which can effectively improve the system The system is safe and reliable to meet the requirements of system automation control.

1. It has three measures to eliminate water hammer, including quick closing, slow closing and energy absorbing chamber, and the action is fully interlocked, without misoperation.
2. There is no need for operation control. When the water pump starts and stops, the pressure change of the medium before and after the valve is used to control the power, so that the valve automatically acts according to the requirements of the pump operation regulations.
3. Without professional debugging, the valve action is not affected by the change of pump head and flow, so it can be used in a wide range.
4. Basically no maintenance, long life.
5. The energy-saving effect is obvious. The pressure at the inlet end enters into the lower chamber of the diaphragm to support the weight of the diaphragm pressing plate and the valve rod, and the resistance loss is small.

1. Nominal pressure: 1.0MPa, 1.6Mpa, 2.5MPa, 4.0Mpa, 6.4Mpa, 10.0MPa
2. Minimum operating pressure: 0.05Mpa
3. Applicable media: raw water, sea water, sewage and oil
4. Applicable temperature: 0 ～ 80 ℃
5. Slow closing time: 3 ~ 120s (adjustable)
6. Peak value of water hammer: ≤ 1.3 times of rated pressure at pump outlet
7. Maximum reverse speed of water pump: ≤ 1.2 times of rated speed of water pump
8. Fatigue bending of diaphragm: 1.2 million times without damage

1、Normal operation process control diagram

 

Installation precautions (see 11 for structural type and installation diagram)
1. Before installation, please check whether all parts of the main valve are in good condition and the fasteners are complete without looseness.
2. Check whether the connecting pipelines are in good condition and the joints are tight.
3. Ensure that the minimum operating pressure meets the requirements of technical parameters.
4. The best installation method is to install the main valve on the horizontal pipeline with the valve cover upward. (typical installation 1)
5. If the main valve is installed in the well, a certain space should be reserved for the maintenance of technicians.
6. During installation, please pay attention to the direction indicated by the arrow on the valve body, and do not install in reverse.
7. If it is necessary to carry out commissioning and observe the working pressure, a pressure gauge must be installed at the inlet and outlet.
8. Regular start-up inspection shall be conducted for fire-fighting to prevent scale and valve failure.
9. Exhaust valve must be installed for deep well pump. (typical installation 3)
10. Please do not use the control pipe to lift or damage the control pipe during hoisting and handling.
11. When other valves are installed at the outlet of multi-functional water pump control valve, a certain distance must be kept.

  1. During installation, pay attention to check and clean the pipeline, and there shall be no welding slag, bolts and other foreign matters.
2. Pipe installation shall be installed with inlet and exhaust valves and other devices according to relevant specifications to ensure no water column interruption.
3. The flexible joint should not be installed at the inlet end of the valve.
4. For the pumping station that may produce water hammer of water column separation, the calculation of water hammer during pump stop should be carried out.

1. Open the valves a and E on the control pipe and start the pump.
2. Start the pump and observe whether there is water leakage in the pipe fittings and whether the pressure at the inlet and outlet of the valve is normal.
3. Then open the exhaust valves D and F to discharge the air from the upper and lower chambers, and repeat for many times until no air is discharged.
4. Slow closing time adjustment:
The slow closing time can be realized by adjusting the opening of control valve E on the bypass pipe. The control valve should be reduced first to extend the slow closing time.
If the slow closing time is too long, the opening of control valve e will be increased.
If the slow closing time is too short, the opening of control valve e can be reduced.
If any abnormality is found, please handle it according to table 2 or contact our company directly.

nominal Diameter	L						H	H1		D						D1						N-d						Reference weight(Kg)
	1.0 MPa	1.6 MPa	2.5 MPa	4.0 MPa	6.4 MPa	10 MPa		1.0 MPa	1.6 MPa	1.0 MPa	1.6 MPa	2.5 MPa	4.0 MPa	6.4 MPa	10 MPa	1.0 MPa	1.6 MPa	2.5 MPa	4.0 MPa	6.4 MPa	10 MPa	1.0 MPa	1.6 MPa	2.5 MPa	4.0 MPa	6.4 MPa	10 MPa
50	240	240	250	265			270			165	165	165	165			125	125	125	125			4-18	4-18	4-18	4-18			17
65	300	300	300	330			340			185	185	185	185			145	145	145	145			4-18	4-18	8-18	8-18			26
80	310	310	310	340	380	420	400			200	200	200	200	215	230	160	160	160	160	170	180	8-18	8-18	8-18	8-18	8-22	8-26	36
100	320	320	350	370	400	460	440			220	220	235	235	250	265	180	180	190	190	200	210	8-18	8-18	8-22	8-22	8-26	8-30	52
125	390	390	410 400	420	460	510	460			250	250	270	270	295	315	210	210	220	220	240	250	8-18	8-18	8-26	8-26	8-30	8-33	70
150	460	460	470	470	520	580	500			285	285	300	300	345	355	240	240	250	250	280	290	8-22	8-22	8-26	8-26	8-33	12-33	109
200	500 540	540	560	560	630	680	640			340	340	360	375	415	430	295	295	310	320	345	360	8-22	12-22	12-26	12-30	12-36	12-36	153
250	610	640	670	670	690	750	680			395	405	425	450	470	505	350	355	370	385	400	430	12-22	12-26	12-30	12-33	12-36	12-39	230
300	700	750 800	800	860	860	940	820	230	240	445	460	485	515	530	585	400	410	430	450	460	500	12-22	12-26	16-30	16-30	16-36	16-42	442
350	800	850 800	900 820	940	960	1040	950	260	272	505	520	555	580	600	655	460	470	490	510	525	560	16-22	16-26	16-33	16-33	16-39	16-48	590
400	930 980	930 980	960 1000	1020			1150	295		565	580	620	660			515	525	550	585			16-26	16-30	16-36	16-36			850
450	1050	1050	1062	1100			1400	335		615	640	670	685			565	585	600	610			20-26	20-30	20-36	20-39			1000
500	1100	1140	1140	1180			1550	350	370	670	715	730	755			620	650	660	670			20-26	20-33	20-36	20-42			1200
600	1300	1350	1350				1600	410	440	780	840	845				725	770	770				20-30	20-36	20-39				1600
700	1520	1550	1550				1750	478		895	910		960			840	840	875				24-30	24-36	24-42				2500
800	1750 1560	1750 1620	1680				1900	550		1015	1025		1085			950	950	990				24-33	24-39	24-48				3500
900	1900 1800	1900 1850	1900				2100	603		1115	1125		1185			1050	1050	1090				28-33	28-39	28-48				5000
1000	2100 2000	2100 2050					2400	665		1230	1255					1160	1170					28-36	28-42					7500
1200	2500 2350	2500 2400					2800	780		1455	1485					1380	1390					32-39	32-48					10000
1400	3000						3400	890		1675						1590						36-42						14000

注：粗體字為新的結構尺寸系列。因產品改進，可能存在實物與宣傳資料有所差異。

Fault phenomenon	Cause failure		Rectification measures
Rectification measures	Other control valve (butterfly valve, gate valve) problems		Check that other control valves are open
	Control line problem	Control line problem	Cleaning pipeline filter Replace the micro check valve
Cleaning pipeline filter Replace the micro check valve	Control line problem	Control line problem	Cleaning pipeline filter Replace the micro check valve
The main valve is not closed tightly		Is there any blockage in the pipe Is the micro check valve damaged	Remove the foreign matters in the pipeline Replace the micro check valve
	Is the main valve plate jammed differently The object and seal are damaged	After repeatedly opening and closing the main valve for several times, the water pump still has the phenomenon of reverse rotation, which is the clamping foreign body and seal damage	Remove the debris or replace the seal
	Is the diaphragm damaged	Open the control valve a on the bypass pipe and close the control valve E; close the emptying valve f and then open the emptying valve D. if there is air or water discharged, it indicates that the valve plate is opening and the valve plate is opened in place.	Replace the diaphragm
Main valve opens too fast	Micro check valve		Replace the micro check valve
	Upper and lower diaphragm chambers and control piping	There is too much gas	Exhaust gas

① Pool ② ⑤ soft seal gate valve ③ water pump ④ multi function water pump control valve ⑦ exhaust valve
⑥ To water tower or user (8) deep well pump

1. Structure: the vertical installation type is an auxiliary spring installed in the valve body of the standard multi-function water pump control valve. 2. Principle: when the main valve is installed vertically, due to the small slope of the valve stem and the slow speed of gravity sliding, it must be closed by the push of spring, which improves the reaction speed of the main valve and makes the valve plate close tightly.

1. Structure: deep well pump type multi-functional water pump control valve is installed with an exhaust valve on the main valve body. 2. Principle: due to the particularity of deep well pump installation, the height difference between the pump and the valve is generally more than 10 meters. When the pump stops, the vacuum in the pipeline between the pump and the valve is easy to form, resulting in breaking water hammer. Therefore, air must be supplied to the pipeline. 3. Features: the deep well pump type valve can supply air to the pipeline when the pump is stopped, which can effectively (pre) prevent the occurrence of breaking water hammer. At the same time, it can discharge air to the atmosphere when starting the pump to prevent water hammer during pump starting. 4. Note: deep well pump type valve can be used for small diameter pipeline below DN200. When the pipe diameter is larger than DN200, the user must also install exhaust valve on the pipeline.