Pipe force control valve is a new pump outlet control valve developed by our company. It is the third generation of new butterfly type multi-function pump control valve after the old manual control valve, hydraulic control butterfly valve and hydraulic control valve. The valve adopts advanced fluid design, with low energy consumption, stable operation and good sealing effect. It has the functions of electric gate valve, electric butterfly valve and check valve. Its quick closing speed and adjustable pressure relief time can effectively eliminate the harm of water hammer and protect the safety of water pump and pipe network system. The valve is suitable for the outlet pipe of centrifugal pump, mixed flow pump and axial flow pump in automatic water supply and drainage pump station. Two control devices, diaphragm type and piston type, are designed, which can be respectively applied to clean water, raw water medium, sewage and slurry water medium. In terms of product types, five specifications are developed, including common type, low-pressure backwater type and sewage type, to meet the requirements of different working conditions.
The valve is compact in structure, small in size and light in weight. It is especially suitable for large diameter pipe network system. It can be widely used in power, environmental protection, metallurgy, petrochemical, water department, municipal, food and other industries, water supply and drainage system, sewage pump station, chemical fluid and other transportation systems.

1. Valve opening: the initial state is shown in (1). When the water pump is started, the water pressure enters the lower chamber of the control chamber through the bypass pipe with micro hole check valve at the inlet. The large valve plate is slowly opened together with the small valve plate under the hydraulic action of the inlet end, as shown in Fig. (2). The opening speed of the valve can be adjusted according to the working conditions to achieve the best effect.

2. Valve closing: at the moment of pump stop, the flow and pressure at the valve inlet suddenly decrease, the large valve plate closes quickly under the action of gravity (before contacting with the sealing surface, there is a buffer protection device) to cut off most of the water flow, and the small valve plate remains open under the action of the control rod to discharge the backflow At the same time, a part of the return water flows into the upper chamber of the control chamber through the bypass pipe. It is presumed that the control rod goes down, and the small valve plate is closed until the medium is completely cut off, as shown in figure (4). The valve closing time can be adjusted by the bypass valve to make the water hammer peak within the control range.

Main technical features of the product

1. Various functions: with light load pump start, closure check, eliminate water hammer and other functions, one valve on top of many valves, saving the total investment of equipment.
   2. Slowly open the pump: after starting the pump, under the action of the microporous check valve at the inlet end, the valve can only be opened after reaching a certain pressure, which can reduce the pump starting current and ensure the safety of the motor and electric control system.
   3. Quick closing and slow closing: the unique double structure of large and small valve plates. When the pump is stopped, the quick closing and then slow closing can effectively eliminate the water hammer and ensure the safety of the system.
   4. Beautiful appearance: the innovative design of control device is adopted in the structure, with small external space, simple internal structure and strong operation reliability. The process is excellent, the shell and parts are precision casting, the structure strength is good, the appearance is simple and exquisite.
   5. Easy to install: butterfly valve structure, small size, light weight, small space, reduce the cost of civil engineering, can be applied to various installation methods such as surface and trench.
   6. Simple maintenance:
   The opening and closing of the valve is driven by the conveying medium and is automatically interlocked with the water pump without manual and external force operation;
   It has no external power and components, adopts integrated structure, and has few fault points;
   The maintenance of the components in the hydraulic cylinder can be carried out at the same time of the normal operation of the unit;
   The key parts are made of high quality materials, which need no maintenance;
   The filter in the external control channel has the function of self washing;
   7. Energy saving and consumption reduction: the opening and closing parts are inclined butterfly plate, the water flow is smooth, and the loss along the way and local loss is very small; cancel the electro-hydraulic control system of hydraulic butterfly valve, reduce the cost, increase the reliability and stability, reduce the power consumption, and achieve the purpose of energy saving.
   8. Reliable action and sealing: the soft and hard double sealing structure (patent zl01249431.3 "soft and hard combined sealing device of valve opening and closing parts" and metal hard sealing structure are adopted, and the friction moment of sealing pair is very small; the oblique eccentric sealing pair shortens the valve closing journey, reduces the sliding distance of sealing ring, reduces the friction torque and achieves the effect of instantaneous clutch In addition, it has the function of anti sediment and automatic pressure compensation; the sealing angle of valve body and valve plate is optimized to make the valve open and close flexibly and reliably.
   9. Strong adaptability:
   1) The products are diaphragm type and piston type, which are suitable for various working conditions and media.
   2) The special filter in the external control component of the sewage type pipe force valve can effectively filter the impurity particles in the sewage and ensure that the medium entering the diaphragm cavity or piston cylinder is clean liquid. The filter device has the function of self washing. The bottom part is equipped with a slag discharging device, which can discharge slag manually and regularly. The system is also equipped with a cleaning device.
   3) The counterweight can be configured according to the working conditions to adjust the closing speed of large valve plate and reduce the running resistance.
   4) The adjustable type can adjust the flow rate by manual or electric control according to the working conditions.

1. The pipe force valve can be installed vertically or horizontally. For the convenience of installation and maintenance, horizontal installation should be given priority when space permits, and the valve shaft should be horizontal.
2. When the valve is closed, the smooth surface of the valve plate is the inlet direction, and the side with the valve shaft and the top rod of the control cylinder is the outlet direction. Reverse installation is strictly prohibited. The distance from adjacent valves, necking and bends shall not be less than 1DN.
3. In horizontal installation, in order to improve the stress condition of pipeline, when the valve diameter is greater than 900mm, support or foundation can be set to improve the stress condition of pipeline.

Material name	Material grade.		Main media
	ANSI/AST standard	G B
carbon steel	WCB	ZG25	Water, oil, etc
Ni Cr cast iron	\	QT400Ni2Cr	seawater
Nickel stainless steel	CF8 (304)	ZGlCrl8Ni9Ti ZGlCrl8Nil2Mo2Ti	Corrosive media such as nitric acid
Cr Ni Mo stainless steel	CF8M (316)		Acetic acid corrosive medium
Chromium nickel ultra low carbon stainless steel	CF3 (304L)		Corrosive media such as nitric acid
	CF3M (316L)		Acetic acid corrosive medium

Main design and manufacturing standards

 

Standard content	Standard number	Standard name
Enterprise standard	Q/OPJF007-2012	Bfdg pipe force control valve
	GB/T12236	Butterfly Check Valve
	API6D	Butterfly check valve with damping
Inspection and test standards	GB/T13927-2008	Pressure test for general purpose valves
Flange standard	GB9113.1-9113.4	Pressure test for general purpose valves
	GB/T12221	Metal valve structure length
Standard of materials used	GB/T12229	Technical specification of carbon steel castings for general purpose valves
	GB/T12230	Technical specification of austenitic copper castings for general purpose valves

project		caliber
		< 1000mm	≥1000mm
Valve closing time（s)	fast	1~2.5	1〜5
	slow	3〜60	5-90
zuiLow working pressure（Mpa)		=0.05
resistance coefficient		0.3〜1.1
Valve opening time
Water hammer peak		S 1.5 times the rated pressure of water pump outlet
High reverse speed of water pump		S 1.2 times rated speed of water pump
Adaptive temperature		Not indicated as 0-80 ° C, can produce - 25 ° C-200 ° C

name	Common material	Chromium nickel stainless steel	Seawater resistant material
Valve shaft	Stainless steel 2Crl3	ZGlCrl8Ni9Ti	316L
Diaphragm / piston	NBR / stainless steel	EPDM/2Crl3	EPDM/316L
Sealing surface of valve body	Semi ferrite high chromium steel d507 (H) Cemented carbide STL (y) A102 stainless steel (R)	ZGlCrl8Ni9Ti	ZcuZn38Mn2Pb2 Manganese brass（T)
Hard seal pair	D507(H)+A102(R)	316L+316L	T+316L

1. Various functions: it has the functions of closure check, light load pump starting, eliminating water hammer, etc., and one valve with multiple valves can save the total investment of equipment.
2. Slowly open the pump: after starting the pump, under the action of the microporous check valve at the inlet end, the valve can only be opened after reaching a constant pressure, which can reduce the pump starting current and ensure the safety of the motor and electric control system.
3. Quick closing and slow closing: unique small valve plate structure (patent of our company 200720064765.7 "slow closing structure of small valve plate of pipe force control valve"), when stopping the pump, fast closing and then slow closing can effectively eliminate water hammer and ensure system safety.
4. Beautiful appearance: the innovative design of control device is adopted in the structure, with small external space, simple internal structure and strong operation reliability. In terms of technology, the shell and parts are precision casting, with good structural strength and simple and exquisite appearance.
5. Easy to install: butterfly valve structure, small size, light weight, small space, reduce the cost of civil engineering, can be applied to various installation methods such as surface and trench.
6. Simple maintenance:
The opening and closing of the valve is driven by the conveying medium and is automatically interlocked with the water pump without manual and external force operation;
It has no external power and components, adopts integrated structure, and has few fault points;
The hydraulic cylinder can be maintained in normal operation;
The key parts are made of high quality materials, which need no maintenance;
The filter in the external control channel has the function of self washing;
7. Energy saving and consumption reduction: the opening and closing parts are inclined butterfly plate, the water flow is smooth, and the loss along the way and local loss is very small; cancel the electro-hydraulic control system of hydraulic butterfly valve, reduce the cost, increase the reliability and stability, reduce the power consumption, and achieve the purpose of energy saving.
8. Reliable operation and sealing: it adopts the soft and hard double sealing structure (patent zl01249431.3 "valve opening and closing parts combined sealing device" patent) or metal hard sealing structure, and the friction moment of sealing pair is very small; The oblique eccentric structure seal pair shortens the valve closing stroke, reduces the slip distance of the seal ring, reduces the friction torque, achieves the effect of instantaneous clutch, and has the function of anti sediment and automatic pressure compensation; the optimized design of sealing angle of valve body and valve plate makes the valve open and close flexibly and reliably.
9. Strong adaptability: the products are diaphragm type and piston type, which are suitable for various working conditions and media. The special filter in the external control unit can effectively filter the impurity particles in the sewage, and ensure that the medium entering the diaphragm cavity or piston cylinder is clean liquid. The filter device has the function of self washing, and the bypass inlet end is equipped with a slag discharge device, which can manually and regularly discharge slag. The adjustable type can adjust the flow rate by manual or electric control according to the working conditions.

1. 1. Valve body 2, valve plate 3, slow closing part 4, control part 5, microporous check valve 6, bypass assembly
   7. Valve rod 8, control ejector 9, small valve plate

表1：

Nominal diameter	length	Dimensions (reference value)								Connection size (standard value)						reference resources weight （kg）
										0.6MPa			1.0MPa
millimeter	L	L1	L2	H	H1	B	B1	B2	n-b	D	D1	n-d	D	D1	n-d
200	190	/	/	520	/	355	/	/	/	320	280	8-18	340	295	8-22	57
250	250	/	/	580	/	420	/	/	/	375	335	12-18	395	350	12-22	80
300	270	/	/	710	/	490	/	/	/	440	395	12-22	445	400	12-22	109
350	290	/	/	770	/	560	/	/	/	490	445	12-22	505	460	16-22	140
400	406	/	/	830	/	625	/	/	/	540	495	16-22	565	515	16-26	220
450	432	/	/	870	/	685	/	/	/	595	550	16-22	615	565	20-26	278
500	457	/	/	930	/	720	/	/	/	645	600	20-22	670	620	20-26	310
600	508	/	/	1090	/	910	/	/	/	755	705	20-26	780	725	20-30	451
700	610	300	240	1260	520	1050	760	650	4-30	860	810	24-26	895	840	24-30	620
800	660	360	220	1440	600	1170	820	720	4-30	975	920	24-30	1015	950	24-33	850
900	711	420	300	1535	650	1315	950	820	4-30	1075	1020	24-30	1115	1050	28-33	1060
1000	811	460	350	1750	700	1460	1040	900	4-36	1175	1120	28-30	1230	1160	28-36	1500
1200	850	500	410	1960	800	1580	1240	1070	4-36	1405	1340	32-33	1455	1380	32-39	1925
1400	950	620	500	2250	900	1900	1400	1250	4-36	1630	1560	36-36	1675	1590	36-42	2400
1600	1100	750	600	2500	1020	2100	1520	1300	4-36	1830	1760	40-36	1915	1820	40-48	3200
1800	1200	860	700	2820	1150	2400	1620	1400	4-36	2045	1970	44-39	2115	2020	44-48	4052
2000	1300	980	820	3150	1250	2750	1800	1550	4-48	2265	2180	48-42	2325	2230	48-48	5126
2200	1450	1100	900	3500	1360	3000	1980	1700	4-48	2475	2390	52-42	2560	2440	52-62	7860
2400	1550	1250	1100	3800	1480	3200	2320	2020	4-48	2685	2600	56-42	2760	2650	56-56	8928
2600	1700	1400	1200	4180	1600	3500	2380	2050	4-48	2905	2810	60-48	2960	2850	60-48	10120
2800	1850	1550	1350	4550	1700	3800	2520	2240	4-48	3115	3020	64-48	3180	3070	64-48	13100
3000	2000	1680	1460	4900	1850	4100	2990	2660	4-48	3315	3220	68-48	3400	3290	68-48	21010

表2：

 

Nominal diameter	length	Dimensions (reference value)								Connection size (standard value)						reference resources weight （kg）
										4.0MPa			6.4MPa
millimeter	L	L1	L2	H	H1	B	B1	B2	n-b	D	D1	n-d	D	D1	n-d
200	190	/	/	520	/	355	/	/	/	375	320	12-30	415	345	12-36	87
250	250	/	/	580	/	420	/	/	/	450	385	12-33	470	400	12-36	110
300	270	/	/	710	/	490	/	/	/	515	450	16-33	530	460	16-36	139
350	290	/	/	770	/	560	/	/	/	580	510	16-36	600	525	16-39	190
400	406	/	/	830	/	625	/	/	/	660	585	16-39	670	585	16-42	290
450	432	/	/	870	/	685	/	/	/	685	610	20-39	/	/	/	368
500	457	/	/	930	/	720	/	/	/	755	670	20-42	/	/	/	410
600	508	/	/	1090	/	910	/	/	/	890	795	20-48	/	/	/	561
700	610	300	240	1260	520	1050	760	650	4-30	995	900	24-48	/	/	/	740
800	660	360	220	1440	600	1170	820	720	4-30	1140	1030	24-56	/	/	/	980
900	711	420	300	1535	650	1315	950	820	4-30	1250	1140	28-56	/	/	/	1210
1000	811	460	350	1750	700	1460	1040	900	4-36	1360	1250	28-56	/	/	/	1730

Table 3
Note: for other pressure levels, please consult the technical department of the company. Different connection standards can be designed and produced according to user requirements.
Due to product improvement, there may be differences between the material object and the publicity materials. The company reserves the right to interpret the above data. Please contact the company's technical department when ordering specific parameters.