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Pneumatic flange eccentric soft sealing butterfly valve

Model: D643H / F
Nominal diameter: DN50-DN2000
Nominal pressure: 0.6 ~ 1.6MPa
Body material: WCB, QT450-10, HT200, HT250
Applicable temperature: Nitrile rubber: -40 ℃ ~ 90 ℃ Viton: 20 ℃ ~ 200 ℃
suitable medium: water, air, natural gas, oil and weak corrosive fluid
manufacturing standards: GB / T122387-89
flange standards: GB9113-2000, GB17241.6-1998
structure standard length: GB12221-89
test Standard: GB / T13927-92

Pneumatic flange eccentric soft seal butterfly valve is composed of angular stroke pneumatic piston actuator and butterfly valve body. It adopts three-dimensional eccentric principle to design so that the space trajectory of the sealing surface is idealized. There is no friction and no interference between the sealing surfaces. Coupled with the proper choice of sealing material, so that the butterfly valve sealing, corrosion resistance, high temperature resistance and wear resistance has been a reliable guarantee.

First, the pneumatic flange soft seal eccentric butterfly valve Features
1, the operating torque is small, all kinds of operating torque in a valve of the smallest, quick opening and closing to compressed air as the driving force through the piston rack and pinion gear mechanical transmission stem , The torque output by the angular stroke of the rotary valve plate 0 ~ 90 °, you can quickly complete the opening and closing movements, simple structure, small size, light weight, small flow resistance, flow coefficient, good sealing performance. Large adjustment range. Is the automation control system instrumentation unit.

2, the use of electric - gas valve positioner to electrical signals and compressed air as the driving force to accept the control system input 0-10mADC or 4-20mADC current signal from the regulator will be compressed air into gas pressure signal input and output, Change the valve plate rotation angle (0-90 ° any angle), with better regulation of control flow and other parameters.

3, the use of electromagnetic valve, valve position back to the device to AC220V or DC24V power supply voltage and compressed air as the driving force to achieve fluid medium fast two-position control.

4, the implementing agencies using piston cylinder and crank conversion structure, the output torque, small size, the use of fully sealed waterproof design high degree of protection. Cylinder body with mirror cylinder, no oil lubrication, small friction coefficient, corrosion resistance, with superior durability and reliability. All drive bearings are self-lubricating bearings with no oil lubrication to ensure that the drive shaft is not worn.

Second, the main end of the parameters

Nominal through DN (mm)	50 ~ 2000		50 ~ 1600
Nominal pressure PN (MPa)	0.6	1.0	1.6
Seal test (MPa)	0.66	1.1	1.76
Strength test (MPa)	0.9	1.5	2.4
proper temperature	Nitrile rubber: -40 ℃ ~ 90 ℃ Viton: -20 ℃ ~ 200 ℃
Suitable media	Water, air, natural gas, oil and weak corrosive fluids
Leak rate	In line with GB / T13927-92 standards
Drive mode	Worm gear, electric, pneumatic, hydraulic

Third, the main components and parts

Part Name	material
Body	WCB, QT450-10, HT200, HT250
Butterfly plate	WCB, QT450-10, HT200, HT250
Valve shaft	2Cr13
Sealing ring	Nitrile oil-resistant rubber
filler	Flexible graphite

Third, the main dimensions

The main form of connection size					Flange size and bolt hole size
DN	L	H	A	B	0.6MPa				1.0MPa				1.6MPa
DN	L	H	A	B	D	D1	D2	nd	D	D1	D2	nd	D	D1	D2	nd
50	108	82.5	306	80	80	140	110	88	4-14	185	125	99	4-18	165	125	99	4-18
65	112	92.5	321	80	80	160	130	108	4-14	185	145	118	4-18	185	145	118	4-18
80	114	100	346	80	80	190	150	124	4-18	200	160	132	8-18	200	160	132	8-18
100	127	110	387	95	95	210	170	144	4-18	220	180	156	8-18	220	180	156	8-18
125	140	125	411	95	95	240	20	174	8-18	250	210	184	8-18	250	210	184	8-18
150	140	142.5	447	95	95	265	225	199	8-18	285	240	211	8-22	285	240	211	8-22
200	152	170	607	190	308	320	280	254	8-18	340	295	266	8-22	340	295	266	12-22
250	165	192.5	688	190	308	375	335	309	12-18	395	350	319	12-22	405	355	319	12-26
300	178	222.5	742	190	308	440	395	363	12-22	445	400	370	12-22	460	410	370	12-26
350	190	252.5	797	190	308	490	445	413	12-22	505	460	429	16-22	520	470	429	16-26
400	216	282.5	930	270	466	540	495	463	16-22	565	515	480	16-26	580	525	480	16-30
450	222	307.5	975	270	466	595	550	518	16-22	615	565	530	20-26	640	585	548	20-30
500	229	335	1065	270	466	645	600	568	20-22	670	620	582	20-26	715	650	609	20-33
600	267	390	1225	457	625	755	705	667	20-26	780	725	682	20-30	840	770	720	20-36
700	292	447.5	1343	457	625	860	810	772	24-26	895	840	794	24-30	910	840	794	24-36
800	318	507.5	1436	457	625	975	920	878	24-30	1015	950	901	24-33	1025	950	901	24-39
900	330	557.5	1616	598	853	1075	1020	978	24-30	1115	1050	1001	28-33	1125	1050	1001	28-39
1000	410	615	1711	598	853	1175	1120	1078	28-30	1230	1160	1112	28-36	1255	1170	1112	28-42
1200	470	727.5	1971	598	853	1405	1340	1295	32-33	1455	1380	1328	32-39	1485	1390	1328	32-48
1400	530	837.5	2218	860	1345	1630	1560	1510	36-36	1675	1590	1530	36-42	1685	1590	1530	36-48
1600	600	957.5	2578	860	1345	1830	1760	1710	40-36	1915	1820	1750	40-48	1930	1820	1750	40-56
1800	670	1057.5	2689	860	1345	2045	1970	1918	44-39	2115	2020	1950	44-48	2130	2020	1950	44-56
2000	760	1162.5	3022	952	1592	2265	2180	2125	48-42	2325	2230	2150	48-48	2345	2230	2150	48-62

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