The two-way flow hard impact ball valve is mainly used to cut off and adjust the medium. This part of the hard impact hard ball valve accounts for a large proportion of the whole system and has a large amount of consumption. It is required that the hard impact hard ball valve is durable and cost-effective. At the same time, it should be able to adjust and load off the medium when the medium is in forward flow, and it can prevent the medium backflow during the pressure difference transformation or maintenance, that is, it has the two-way cut-off function. Recently, this part of the valve in the pipe network system, hard hit hard ball valve, the main application of the globe valve, gate valve, butterfly valve and ball valve.

1. Main types: the main types of the valve are: worm gear, electric, pneumatic, hydraulic, among which pneumatic valve and hydraulic valve are suitable for occasions with pressure air source and pressure liquid source.  
2. Working principle: the sealing surface of valve core is cubic curved surface, and the sealing surface of valve seat is conic surface. At the sealing point, the seat surface is actually the section of the valve core cubic curved surface (see Figure), so its combination is perfect. It has the function of adaptation (automatic center positioning and overlapping) and compensation for wear. Since the rotation center deviates from the geometric center of the valve core, the actual effect of the spool body is constantly backward and inward when the valve core is opened, and the valve core body is constantly advancing and expanding outward when the valve core is closed. Its function is equivalent to the synthesis of half ball valve, gate valve, globe valve and butterfly valve. Open the diagram of different angles: the main function of the two-way flow valve is that it can not only seal well under the positive pressure, but also seal well when the reverse pressure or the reverse pressure is greater than the positive pressure. When the positive pressure acts, the medium pressure pushes the valve plate to move forward and the valve stem deforms. The sealing surface of the valve plate is close to the sealing surface of the valve seat to transmit pressure, which pushes the valve seat to the valve body step to make it well sealed. When the reverse pressure acts, the medium pressure pushes the valve plate to move backward, and the valve stem deforms. At the same time, the medium pressure pushes the sealing surface of the valve seat close to the sealing surface of the valve plate, transmitting pressure, and pushing the valve seat to the limit deformation position of the valve rod, so as to make it well sealed.

 

Driving mode of double flow hard impact hard ball valve
Driving mode	Manual	worm	Hydrodynamics	Electric	Pneumatic
model	GWXDF207	GWXDF3207	GWXDF7207	GWXDF9207	GWXDF6207
model	GWXDF204	GWXDF3204	GWXDF7204	GWXDF9204	GWXDF6204

Sealing surface material

Shell material of hard impact ball valve with two-way flow
Code name	Z	Q	C	I	P	R
Material Science	Gray cast iron	Ductile iron	WCB	1Cr5Mo、ZG1Cr5Mo	1Cr18Ni9Ti ZG1Cr18Ni9Ti	1Cr18Ni12MoTi、 ZG1Cr18Ni12MoTi

Nominal pressure

Technical performance specification for two way flow hard impact ball valve
Nominal diameter（mm）	Nominal pressure（Mpa）	Test pressure（Mpa）			Applicable temperature（℃）	Applicable media
		Shell strength test	Forward sealing test	Reverse sealing test
DN50~3000mm	0.6	0.9	0.66	0.66	If not indicated as 0 ~ 80 ℃, 0 ~ 200 ℃ can be produced	Water, sewage, oil, etc
	1.0	1.5	1.1	1.1
	1.6	2.4	1.76	1.76
	2.5	3.75	2.76	2.76
	4.0	6.0	4.4	4.4

Main design and manufacturing standards of double flow hard impact ball valve
Standard content	Standard number	Standard name
Flange standard	GB/T9113-2000	Integral steel pipe flange
	GB/T17241.6-1998	Integral cast iron pipe flange
Structural length standard	GB/T1221-2005	Structural length of metal valve
Structural length standard	GB/T13927-1992	General purpose valve pressure test
	JB/T9092-1999	Test and inspection of valves

Structural design criteria	GB/T12237-1989	General purpose valves flanged and butt welded steel ball valves
	GB/T12238-1989	General purpose valve flange and wafer connection butterfly valve
Standard of materials used	GB/T12226-1989	Technical specification of gray iron castings for general purpose valves
	GB/12227-1989	Technical conditions of ductile iron for general purpose valves

Structural design criteria	GB/T12237-1989	General purpose valves flanged and butt welded steel ball valves
	GB/T12238-1989	General purpose valve flange and wafer connection butterfly valve
Standard of materials used	GB/T12226-1989	Technical specification of gray iron castings for general purpose valves
	GB/12227-1989	Technical conditions of ductile iron for general purpose valves

 

Structural design criteria	GB/T12237-1989	General purpose valves flanged and butt welded steel ball valves
	GB/T12238-1989	General purpose valve flange and wafer connection butterfly valve
Standard of materials used	GB/T12226-1989	Technical specification of gray iron castings for general purpose valves
	GB/12227-1989	Technical conditions of ductile iron for general purpose valves

 

Structural design criteria	GB/T12237-1989	General purpose valves flanged and butt welded steel ball valves
	GB/T12238-1989	General purpose valve flange and wafer connection butterfly valve
Standard of materials used	GB/T12226-1989	Technical specification of gray iron castings for general purpose valves
	GB/12227-1989	Technical conditions of ductile iron for general purpose valves

 

Structural design criteria	GB/T12237-1989	General purpose valves flanged and butt welded steel ball valves
	GB/T12238-1989	General purpose valve flange and wafer connection butterfly valve
Standard of materials used	GB/T12226-1989	Technical specification of gray iron castings for general purpose valves
	GB/12227-1989	Technical conditions of ductile iron for general purpose valves

Structural design criteria	GB/T12237-1989	General purpose valves flanged and butt welded steel ball valves
	GB/T12238-1989	General purpose valve flange and wafer connection butterfly valve
Standard of materials used	GB/T12226-1989	Technical specification of gray iron castings for general purpose valves
	GB/12227-1989	Technical conditions of ductile iron for general purpose valves

 

General purpose valve flange and wafer connection butterfly valve	GB/T12237-1989	General purpose valves flanged and butt welded steel ball valves
	GB/T12238-1989	General purpose valve flange and wafer connection butterfly valve
Standard of materials used	GB/T12226-1989	Technical specification of gray iron castings for general purpose valves
	GB/12227-1989	Technical conditions of ductile iron for general purpose valves

 

Structural design criteria	GB/T12237-1989	General purpose valves flanged and butt welded steel ball valves
	GB/T12238-1989	General purpose valve flange and wafer connection butterfly valve
	GB/T12226-1989	Technical specification of gray iron castings for general purpose valves
	GB/12227-1989	Technical conditions of ductile iron for general purpose valves

Structural design criteria		General purpose valves flanged and butt welded steel ball valves
	GB/T12238-1989	General purpose valve flange and wafer connection butterfly valve
Standard of materials used	GB/T12226-1989	Technical specification of gray iron castings for general purpose valves
	GB/12227-1989	Technical conditions of ductile iron for general purpose valves

Structural design criteria	GB/T12237-1989	General purpose valves flanged and butt welded steel ball valves
	GB/T12238-1989	General purpose valve flange and wafer connection butterfly valve
Standard of materials used	GB/T12226-1989	Technical specification of gray iron castings for general purpose valves
	GB/12227-1989	Technical conditions of ductile iron for general purpose valves

Structural design criteria	GB/T12237-1989	General purpose valves flanged and butt welded steel ball valves
	GB/T12238-1989	General purpose valve flange and wafer connection butterfly valve
Standard of materials used	GB/T12226-1989	Technical specification of gray iron castings for general purpose valves
	GB/12227-1989	Technical conditions of ductile iron for general purpose valves

 

Structural design criteria	GB/T12237-1989	General purpose valves flanged and butt welded steel ball valves
	GB/T12238-1989	General purpose valve flange and wafer connection butterfly valve
Standard of materials used	GB/T12226-1989	Technical specification of gray iron castings for general purpose valves
	GB/12227-1989	Technical conditions of ductile iron for general purpose valves

Structural design criteria	GB/T12237-1989	General purpose valves flanged and butt welded steel ball valves
	GB/T12238-1989	General purpose valve flange and wafer connection butterfly valve
Standard of materials used	GB/T12226-1989	Technical specification of gray iron castings for general purpose valves
	GB/12227-1989	Technical conditions of ductile iron for general purpose valves

 

Structural design criteria	GB/T12237-1989	General purpose valves flanged and butt welded steel ball valves
	GB/T12238-1989	General purpose valve flange and wafer connection butterfly valve
Standard of materials used	GB/T12226-1989	Technical specification of gray iron castings for general purpose valves
	GB/12227-1989	Technical conditions of ductile iron for general purpose valves

Structural design criteria	GB/T12237-1989	General purpose valves flanged and butt welded steel ball valves
	GB/T12238-1989	General purpose valve flange and wafer connection butterfly valve
Standard of materials used	GB/T12226-1989	Technical specification of gray iron castings for general purpose valves
	GB/12227-1989	Technical conditions of ductile iron for general purpose valves

Materials of main parts of double flow hard impact ball valve
Part name	Material name or code
valve body	Gray cast iron, ductile iron, WCB, carbon steel
Valve plate	WCB、Q235、stainless steel
Stem	stainless steel
valve seat	WCB、Q235、stainless steel

Main design and manufacturing standards

Main design and manufacturing standards of double flow hard impact ball valve
Standard content	Standard number	Standard name
Flange standard	GB/T9113-2000	Integral steel pipe flange
	GB/T17241.6-1998	Integral cast iron pipe flange

 

Structural length standard	GB/T1221-2005	Structural length of metal valve
Pressure test standard	GB/T13927-1992	General purpose valve pressure test
	JB/T9092-1999	Test and inspection of valves
Structural design criteria	GB/T12237-1989	General purpose valves flanged and butt welded steel ball valves

 

	GB/T12238-1989	General purpose valve flange and wafer connection butterfly valve
Standard of materials used	GB/T12226-1989	Technical specification of gray iron castings for general purpose valves
	GB/12227-1989	Technical conditions of ductile iron for general purpose valves
	GB/T12229-1989	Technical specification of carbon castings for general purpose valves

	GB/T12238-1989	General purpose valve flange and wafer connection butterfly valve
Standard of materials used	GB/T12226-1989	Technical specification of gray iron castings for general purpose valves
	GB/12227-1989	Technical conditions of ductile iron for general purpose valves
	GB/T12229-1989	Technical specification of carbon castings for general purpose valves

	GB/T12238-1989	General purpose valve flange and wafer connection butterfly valve
Standard of materials used	GB/T12226-1989	Technical specification of gray iron castings for general purpose valves
	GB/12227-1989	Technical conditions of ductile iron for general purpose valves
	GB/T12229-1989	Technical specification of carbon castings for general purpose valves

 

 

 

 

 

 

 

 

 

 

Technical performance specification for two way flow hard impact ball valve
	Nominal pressure(MPa)	Test pressure(MPa)			Applicable temperature(℃)	Applicable media
		Shell strength test	Forward sealing test	Reverse sealing test
DN50～500	1.0	1.5	1.1	1.1	If it is not specified as below 80 ℃, it can be produced below 200 ℃	Water, sewage, oil, etc

 

Driving mode

Connection type of double flow hard impact hard ball valve
Code name	4
Connection type	flange

Parameter table of electric actuator

Parameter table of electric actuator for two way flow hard impact ball valve
Nominal diameter of valve(mm)	Model and specification of electric actuator	Zui large control torque (nm)	Output speed（r/min）	Motor power（kw）	Motor locked rotor current（A）
50	SMR-10	100	18	0.25	7.21
65	SMR-10	100	18	0.25	7.21
80	SMR-20	200	18	0.55	15.4
100	SMR-20	200	18	0.55	15.4

 

125	SMR-40	300	18	0.75	18.34
150	SMR-40	450	18	1.1	28.00
200	SMR-60	450	18	1.1	28.00
250	SMR-100	900	18	2.2	36.75
300	SMR-100	900	18	2.2	36.75
350	Z120-18	1200	18	3.0	55.30
400	Z250-18	2500	18	5.5	84.35
450	Z350-10	3500	10	4.0	62.09
500	Z500-10	5000	10	5.5	84.35
600	Q600-0.5	6000	0.5	0.75	18.34
700	Q800-0.5	8000	0.5	1.1	28.00
800	Q1200-0.5	12000	0.5	1.5	28.14
900	Q1600-0.5	16000	0.5	2.2	36.75
1000	Q2000-0.5	20000	0.5	3.0	55.30
1200	Q3000-0.5	30000	0.5	4.0	62.09
1400	Q4000-0.5	40000	0.5	4.0	62.09
1600	Q6300-0.25	63000	0.25	5.5	84.35
1800	Q8000-0.25	80000	0.25	5.5	84.35
2000	Q12000-0.125	120000	0.125	5.5	84.35

Installation dimension table of two way flow hard impact ball valve

DiameterDN

A

B

C

D

E

H

L

N__Фd

Manual

Electric

Electric

Manual

Electric

Electric

Clip on type

Flange type

Clip on type

Flange type