The development of butterfly valve and its application in the process of easy to understand

In the 1930s, the United States invented the butterfly valve, which was introduced to Japan in the 1950s and was not commonly used in Japan until the 1960s. However, promotion in our country was after the 1970s. At present, butterfly valves of DN300 mm or above have gradually replaced gate valves in the world. Compared with the gate valve butterfly valve has a short opening and closing time for the moment of small, small installation space and light weight. Take DN1000 as an example, the butterfly valve is about 2T, while the gate valve is about 3.5T, and the butterfly valve is easy to combine with various driving devices, and has good durability and reliability. The disadvantage of the rubber-sealed butterfly valve is that when it is used for throttling, cavitation may occur due to improper use, causing the rubber seat to peel and damage. To this end, the international development of metal seal butterfly valve, cavitation area decreases in recent years, China has also developed a metal seal butterfly valve in Japan in recent years also developed cavitation-resistant, low vibration, low noise comb-shaped butterfly valve. General seal seat life under normal circumstances, rubber 15 years - 20 years, 80 years of metal - 90 years. But how to choose correctly according to working conditions. The relationship between the opening of the butterfly valve and the flow rate changes substantially linearly. If it is used to control the flow, its flow characteristics are closely related to the flow resistance of the pipe. For example, the diameters and forms of the valves installed in the two pipes are all the same, while the pipe loss coefficient is different, and the flow difference of the valve will also be very large. ? If the valve is in a state of large throttling, the back of the valve plate is prone to cavitation, the possibility of damage to the valve, are generally used outside the 15 °. When the butterfly valve is at the opening, the shape of the opening formed by the valve body and the front end of the butterfly plate is centered on the valve shaft, and the two sides form a different state. The front end of the butterfly plate on one side moves in the direction of flowing water while the direction of the counter flow Therefore, one side of the valve body and the valve plate is formed like a nozzle-shaped opening, the other side is similar to the orifice-shaped opening, the nozzle side is faster than the throttling side of the flow rate, and the throttling side valve generates a negative pressure below, Rubber seals tend to come off. Butterfly valve operating torque, due to the opening and the valve opening and closing direction of different values, horizontal butterfly valve, especially large-diameter valve, due to the depth of the valve shaft, the difference between the head and the resulting torque can not be ignored. In addition, the valve inlet side of the device elbow, the formation of bias current, the torque will increase. Valve in the middle of the opening, due to the role of water flow torque, the operating mechanism needs self-locking.

: Carbon steel seamless pipes for use in low and medium pressure boilers, petroleum casing tubes, ships, fluid conveyance, petroleum cracking, chemical fertilizer equipments, structures, and hollow pumping rods. We can produce seamless steel pipes from 12″ to D40″, thickness SCH30, SCH40, SCH80, SCH160 and so on, according to the standards such as \ASTM\API 5L\BS EN ISO, 

(1)From 2″-4″, our pipes are cold drawning.

(2)From 4″-12″, our pipes are hot rolling.(stok available )

(3)Over 12″, our pipes are hot expending max 40'

A53 Chemical components and mechanical propert

Standard

Trade mark

Chemical components

Mechanical property

C

Si

Mn

P

S

Cu

Ni

Mo

Cr

V

Tensile Strength(Mpa)

Yield Strength (Mpa)

Elongation(%)

ASTM A53

A

≤0.25

/

≤0.95

≤0.05

≤0.06

≤0.40

≤0.40

≤0.15

≤0.40

≤0.08

≥ 330

≥ 205

≥ 29.5

B

≤0.30

/

≤1.2

≤0.05

≤0.06

≤0.40

≤0.40

≤0.15

≤0.40

≤0.08

≥ 415

≥ 240

≥ 29.5

 

A106 Chemical components and mechanical property

Standard

Trade mark

Chemical components

Mechanical property

C

Si

Mn

P

S

Cu

Ni

Mo

Cr

V

Tensile Strength (Mpa)

Yield Strength (Mpa)

Elongation (%)

ASTMA106

B

≤0.30

≥0.10

0.29~1.06

≤0.035

≤0.035

≤0.40

≤0.40

≤0.15

≤0.40

≤0.08

≥415

≥240

≥30

C

≤0.35

≥0.10

0.29~1.06

≤0.035

≤0.035

≤0.40

≤0.40

≤0.15

≤0.40

≤0.08

≥ 485

≥275

≥ 30

 

API 5L Chemical components and mechanical property PSL1
Class and Sort			Chemical components											Mechanical property
			C (Max)		Mn (Max)		P (Max)			S (Max)			Tensile Strength( Min)																														Yeild Strengh(Min)
													psi									Mpa										psi											Mpa
A25	CLI		0.21		0.6		0.03			0.03			45000									310										25000											172
	CLII		0.21		0.6		0.03			0.03
A			0.22		0.9		0.03			0.03			48000									331										30000											207
B			0.28		1.2		0.03			0.03			60000									414										35000											214
X42			0.28		1.3		0.03			0.03			60000									414										42000											290
X46			0.28		1.4		0.03			0.03			63000									434										46000											317
X52			0.28		1.4		0.03			0.03			66000									455										52000											359
X56			0.28		1.4		0.03			0.03			71000									490										56000											386
X60			0.28		1.4		0.03			0.03			75000									517										60000											414
X65			0.28		1.4		0.03			0.03			77000									531										65000											448
X70			0.28		1.4		0.03			0.03			82000									565

 

A192 Chemical components and mechanical property

Chemical components

Mechanical property

Standard

Trademark

C

Si

Mn

P

S

Cu

Ni

Mo

Tensile Strength(Mpa)

Yield Strength (Mpa)

Elong ation (%)

ASTM A192

A192

0.06-0.18

≤0.25

0.27-0.63

0

0.04

/

/

/

≥325

≥ 180

Chemical components:

Chemical components

Mechanical property

Standard

Trade mark

C

Si

Mn

P

S

Cr

Ni

Mo

Tensile Strength(Mpa)

Yield Strength(Mpa)

Elongation(%)

EN102016-2

P235GH

≤0.16

≤0.35

≤1.20

≤0.025

≤0.020

0.30

/

≤0.08

360-500

≥235

≥23

P265GH

≤0.20

≤0.40

≤1.40

≤0.025

≤0.020

0.30

/

≤0.08

41

Usage	Specification	Steel Grade	SZIE	STOCK
High Temperature Seamless Carbon Steel Nominal Pipe	ASME SA-106/	B.C	SMLS 2"-40" T3.91-17.48mm	Avilalbe
	SA-106M
Seamless Carbon Steel Boil Pipe used for High Pressure	ASME SA-192/	A192	SMLS 2"-40" T3.91-17.48mm	None /Custom-make
	SA-192M
Seamless Carbon Molybdenum Alloy Pipe used for Boiler and Superheater	ASME SA-209/	T1.T1a.T1b	SMLS 2"-40" T3.91-17.48mm	None /Custom-make
	SA-209M
Seamless Medium Carbon Steel Tube & Pipe used for Boiler and Superheater	ASME SA-210/	A-1.C	SMLS 2"-40" T3.91-17.48mm	None /Custom-make
	SA -210M
Seamless Ferrite and Austenite Alloy Steel Pipe used for Boiler, Superheater and Heat Exchanger	ASME SA-213/	T2.T5.T11.T12.T22.T91	SMLS 2"-30" T3.91-17.48mm	Avilalbe
	SA-213M
Seamless Ferrite Alloy Nominal Steel Pipe applied for High Temperature	ASME SA-335/	P2.P5.P11.P12.P22.P36.P9.P91.P92	SMLS 2"-30" T3.91-17.48mm	Avilalbe
	SA-335M
Seamless Low Temperture Stee Pipe	ASME SA-333/	Gr3 Gr6	SMLS 2"-16" T3.91-14.27mm	Avilalbe
	SA-333M
Seamless Gas Line  Stee Pipe	API 5L PLS1 /PLS2	L245 ,L245N, L245Q ,L290,L290N, L290Q, L360, L360N, L360Q, L415 ,L415N ,L415Q	SMLS 2"-16" T3.91-14.27mm	General service  avilable
				(L485 ,L485N .L485Q           Custom made )
Seamless Steel Pipe made by Heat-resistant Steel	DIN 17175	St35.8.St45.8.15Mo3.13CrMo44.10CrMo910	SMLS 2"-16" T3.91-17.48mm	None /Custom-make
Seamless Steel Pipe for	EN 10216	P195GH.P235GH.P265GH.13CrMo4-5.10CrMo9-10.15NiCuMoNb5-6-4.X10CrMoVNb9-1	SMLS 2"-16" T3.91-17.48mm	None /Custom-make
Pressure Application

Stainless steel pipe material avilalbe :

304/SUS304/UNS S30400/1.4301

304L/UNS S30403/1.4306;

304H/UNS S30409/1.4948;

309S/UNS S30908/1.4833

309H/UNS S30909;

310S/UNS S31008/1.4845;

310H/UNS S31009;

316/UNS S31600/1.4401;

316Ti/UNS S31635/1.4571;

316H/UNS S31609/1.4436;

316L/UNS S31603/1.4404;

316LN/UNS S31653;

317/UNS S31700;

317L/UNS S31703/1.4438;

321/UNS S32100/1.4541;

321H/UNS S32109;

347/UNS S34700/1.4550;

347H/UNS S34709/1.4912;

348/UNS S34800;

 

Alloy steel:

ASTM A234 WP5/WP9/WP11/WP12/WP22/WP91;

ASTM A860 WPHY42/WPHY52/WPHY60/WPHY65;

ASTM A420 WPL3/WPL6/WPL9;

 

Duplex steel

ASTM A182 F51/S31803/1.4462;

ASTM A182 F53/S2507/S32750/1.4401;

ASTM A182 F55/S32760/1.4501/Zeron 100;

2205/F60/S32205;

ASTM A182 F44/S31254/254SMO/1.4547;

17-4PH/S17400/1.4542/SUS630/AISI630;

F904L/NO8904/1.4539;

725LN/310MoLN/S31050/1.4466

253MA/S30815/1.4835;

 

Nickel alloy steel:

Alloy 200/Nickel 200/NO2200/2.4066/ASTM B366 WPN;

Alloy 201/Nickel 201/NO2201/2.4068/ASTM B366 WPNL;

Alloy 400/Monel 400/NO4400/NS111/2.4360/ASTM B366 WPNC;

Alloy K-500/Monel K-500/NO5500/2.475;

Alloy 600/Inconel 600/NO6600/NS333/2.4816;

Alloy 601/Inconel 601/NO6001/2.4851;

Alloy 625/Inconel 625/NO6625/NS336/2.4856;

Alloy 718/Inconel 718/NO7718/GH169/GH4169/2.4668;

Alloy 800/Incoloy 800/NO8800/1.4876;

Alloy 800H/Incoloy 800H/NO8810/1.4958;

Alloy 800HT/Incoloy 800HT/NO8811/1.4959;

Alloy 825/Incoloy 825/NO8825/2.4858/NS142;

Alloy 925/Incoloy 925/NO9925;

Hastelloy C/Alloy C/NO6003/2.4869/NS333;

Alloy C-276/Hastelloy C-276/N10276/2.4819;

Alloy C-4/Hastelloy C-4/NO6455/NS335/2.4610;

Alloy C-22/Hastelloy C-22/NO6022/2.4602;

Alloy C-2000/Hastelloy C-2000/NO6200/2.4675;

Alloy B/Hastelloy B/NS321/N10001;

Alloy B-2/Hastelloy B-2/N10665/NS322/2.4617;

Alloy B-3/Hastelloy B-3/N10675/2.4600;

Alloy X/Hastelloy X/NO6002/2.4665;

Alloy G-30/Hastelloy G-30/NO6030/2.4603;

Alloy X-750/Inconel X-750/NO7750/GH145/2.4669;

Alloy 20/Carpenter 20Cb3/NO8020/NS312/2.4660;

Alloy 31/NO8031/1.4562;

Alloy 901/NO9901/1.4898;

Incoloy 25-6Mo/NO8926/1.4529/Incoloy 926/Alloy 926;

Inconel 783/UNS R30783; 

NAS 254NM/NO8367;

Monel 30C

Nimonic 80A/Nickel Alloy 80a/UNS N07080/NA20/2.4631/2.4952

Nimonic 263/NO7263

Nimonic 90/UNS NO7090;

Incoloy 907/GH907;

Nitronic 60/Alloy 218/UNS S21800

 

Seamless Pipe

Seamless Pipe,Seamless Stainless Steel Pipe,Seamless Steel Pipe,Galvanized Steel Pipe

He Bei GuangHao Pipe Fittings Co .,LTD (Cangzhou Sailing Steel Pipe Co., Ltd) , https://www.guanghaofitting.com