D673H、D673WType pn6 ～ PN40 double clip type hard seal pneumatic butterfly valve pn6 ～ PN40 uses the round butterfly plate which rotates with the valve stem to open and close, so as to realize the starting action. The pneumatic valve is mainly used as the block valve, and can also be designed to have the function of regulating or segment valve and regulating. At present, the butterfly valve is used more and more on the low pressure large and medium diameter pipeline. A U-shaped stainless steel sealing ring is used in pneumatic wafer type metal seal butterfly valve. The precision elastic sealing ring contacts with polished butterfly plate in three-dimensional eccentric contact, which solves the problem that the sealing surface of traditional eccentric butterfly valve is still in sliding contact friction at the moment of opening and closing, and realizes the effect that the sealing surface of butterfly plate is separated at the moment of opening and closing, and the sealing effect is achieved when the contact is closed, The purpose of prolonging the service life of butterfly valve and improving sealing performance is achieved.

D673H、D673WMain performance parameters of pn6 ～ PN40 double clip type hard seal pneumatic butterfly valve

Nominal diameter	DN（mm）	50～1200
Nominal pressure	PN（MPa）	0.6	1.0	1.6	2.5	4.0
Test pressure	strength test	0.9	1.5	2.4	3.75	6.0
	Sealing test	0.66	1.1	1.76	2.75	4.4
	Airtight seal test	0.6	0.6	0.6	0.6	0.6
Applicable media	Corrosivity of water, steam, oil and acid.
Applicable temperature	Carbon steel: - 29 ℃～ 600 ℃, stainless steel - 40 ℃～ 600 ℃

advantage
The main advantages of pneumatic double clip type hard seal butterfly valve are simple structure, small volume, light weight and low cost. This feature is especially obvious for pneumatic hard seal butterfly valve. It is installed in the dark channel at high altitude and controlled by two position five way solenoid valve. It is easy to operate and adjust the flow medium. The flow resistance is small. When the medium and large diameter pneumatic butterfly valve is fully opened, the effective circulation area is large, and the opening and closing is quick and labor-saving. The disc plate can be opened and closed by 90 degrees of rotation. Because the medium force of disc wrench on both sides of the rotating shaft is nearly equal, the torque direction generated is opposite, so the opening and closing torque is small, and good sealing can be achieved under low pressure. The sealing materials of butterfly valve are NBR and fluororubber, Edible rubber is lined with PTFE, so it has good sealing performance. The hard sealing disc valve is hard and soft laminated metal plate, which has the advantages of metal hard seal and elastic seal, and has excellent sealing performance no matter at low temperature.

D673H、D673WDimensions of pn6 ～ PN10 pneumatic butterfly valve（mm)

DN		Structural length Standard value	Overall dimension (reference value)				Connection size (standard value)				weight (kg)
			H	H2	A2	B2	PN0.6MPa		PN1.0MPa
mm	in	L					D1	Z-d	D1	Z-d
50	2	43	112	625	245	72	110	4-14	125	4-18	11
65	21/2	46	115	625	245	72	130	4-14	145	4-18	12
80	3	49	120	645	245	72	150	4-18	160	8-18	14
100	4	56	138	675	355	92	170	4-18	180	8-18	16
125	5	64	164	715	355	92	200	8-18	210	8-18	26
150	6	70	175	800	355	92	225	8-18	240	8-22	28
200	8	71	208	850	250	170	280	8-18	295	8-22	44
250	10	76	243	925	250	170	335	12-18	350	12-22	68
300	12	83	283	1035	450	220	395	12-22	400	12-22	85
350	14	92	310	1070	450	220	445	12-22	460	16-22	121
400	16	102	340	1190	450	220	495	16-22	515	16-22	140
450	18	114	380	1250	650	280	550	16-22	565	20-26	190
500	20	127	410	1290	650	280	600	20-22	620	20-26	260
600	24	154	470	1455	850	380	705	20-26	725	20-30	380
700	28	165	550	1585	850	380	810	24-26	840	24-30	450
800	32	190	640	1700	1250	380	920	24-30	950	24-33	650
900	36	203	710	1965	1250	380	1020	24-30	1050	28-33	830
1000	40	216	770	2015	1250	380	1120	28-30	1160	28-36	1050
1200	48	254	890	2250	1250	380	1340	32-33	1380	32-39	1400

 

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.