D671F、D671XPneumatic double clip type soft seal butterfly valve pn6 ~ PN25 can be divided into pneumatic clamp soft seal butterfly valve and pneumatic hard seal butterfly valve. Parts of different materials can be selected for valve body, and sealing rings of different materials can be used for cutting off medium and regulating medium flow. The pneumatic double clip butterfly valve is suitable for water supply and drainage, sewage, food, heating, gas, ship, hydropower, metallurgy, energy system and light and textile industries. It is especially suitable for bidirectional sealing and valve body corrosion prone occasions as flow regulation and closure medium.

D671F、D671XMain performance parameters of pneumatic double clip type soft seal butterfly valve pn6 ～ PN25

Nominal diameterDN(mm)	50～1200
Nominal pressure	PN0.6、1.0、1.6、2.5MPa
Connection form	Clip on type
Valve plate type	Vertical plate
Flow characteristics
Range of motion	0～90°
Amount of leakage	According to GB / t4213-92, it is 10-4 of Kv value, soft seal: zero leakage
Basic error	With positioner: less than full stroke±2%%
Return difference	With positioner: less than full stroke±2%
Return difference configuration actuator	GT、AT、AWSeries single double acting pneumatic actuator
control mode	Switch type (switch two position control), regulating type (4 ～ 20mA control)

D671F、D671XMain performance specification of pneumatic double clip type soft seal butterfly valve pn6 ～ PN25

Nominal diameterDN(mm)		DN50～1200
Nominal pressure	PN(MPa)	0.6	1.0	1.6	2.5
Test pressure	strength test	0.9	1.5	2.4	3.75
	Sealing test	0.66	1.1	1.76	2.75
	Low pressure air tightness test	0.5～0.7
Applicable media	Water, oil, steam, nitric acid (temperature ≤ 200 ℃), acetic acid (temperature ≤ 200 ℃)

D671F、D671XMain connection dimensions of pneumatic double clip type soft seal butterfly valve pn6 ～ PN25（mm)

Nominal diameter(DN)	Main dimensions						Flange size
	D673H/F		D671F/X		A	H1	1.0MPa		1.6MPa		2.5MPa
	L	H	L	H			K	n-Фd	K	n-Фd	K	n-Фd
50	43	112	43	63	180	315	125	4-18	125	4-18	125	4-18
65	46	115	46	70	180	330	145	4-18	145	4-18	145	8-18
80	46	120	46	83	245	390	160	4-18	160	8-18	160	8-18
100	52	138	52	105	240	431	180	8-18	180	8-18	190	8-22
125	56	164	56	115	240	455	210	8-18	210	8-18	220	8-26
150	56	175	56	137	350	626	240	8-22	240	8-22	250	8-26
200	60	200	60	164	350	720	295	8-22	295	12-22	310	12-26
250	68	243	68	206	550	800	350	12-22	355	12-26	370	12-30
300	78	250	78	230	600	860	400	12-22	410	12-26	430	16-30
350	78	280	78	248	600	883	460	16-22	470	12-26	490	16-33
400	102	305	102	289	600	972	515	16-26	525	16-26	550	16-36
450	114	350	114	320	750	1043	565	20-26	585	16-30	600	20-36
500	127	380	127	343	750	1098	620	20-26	650	20-30	660	20-36
600	154	445	154	413	750	1236	725	20-30	770	20-33	770	20-39
700	165	480	165	478	750	1431	840	24-30	840	24-36	875	24-42
800	190	530	190	525	750	1488	950	24-33	950	24-39	990	24-48
900	203	580	203	585	1250	1615	1050	28-33	1050	28-39	1090	28-48
1000	216	650	216	640	1500	1765	1160	28-36	1170	28-42	1210	28-56
1200	254	760	254	755	1500	1976	1380	32-39	1390	32-48	1420	32-56

 

1. Before installation, check whether the specification, pressure, temperature and corrosion resistance of butterfly valve meet the use requirements. Check whether the parts are damaged or loose.
2. The butterfly valve can be installed on the pipeline at any angle and should be closed; when welding the pipe flange, the valve sealing port should be blocked with a plate to prevent particles and sundries from damaging the sealing surface. After welding, take down the valve, clean the valve sealing surface and pipe cavity, and then install the fixed valve.
3. Please pay attention to the pressure bearing direction when the valve is closed.
4. Before installation, the sealing surface (sealing surface at both ends, sealing surface of butterfly plate and sealing surface of valve seat) shall be thoroughly cleaned to remove dust and dirt.
5. Before installation, the butterfly valve should be air tested, and the opening and closing position should be flexible, and the opening and closing position should be consistent with the position indicated by the pointer.
6. Manual operation, clockwise is off, counter clockwise is on, pointer indication is in place, it is not allowed to open and close the valve with additional force.
7. During the pressure test of the valve, it is not allowed to use single flange for installation and pressure test, but double flange installation and pressure test must be adopted. The test pressure shall comply with GB / T13927-92.
8. The bolts shall be tightened symmetrically and alternately instead of separately.
9. The limit screw has been adjusted before delivery, so it is not allowed to adjust it easily. Please refer to the manual for electric drive device.
10. When the electric butterfly valve leaves the factory, the opening and closing stroke of the control mechanism has been adjusted. In order to prevent the wrong direction when the power supply is connected, the user should first manually open it to the half open position before connecting the power for the first time, and then press the inching switch to check that the direction of the indicator wheel is consistent with the opening direction of the valve.
11. If the valve is found to be open and closed abnormally, the cause shall be found out for repair and elimination, so as to prevent the valve from being damaged due to opening and closing by means of applying force.