D371XThe butterfly valve pn6 ～ PN16 is composed of rubber seal butterfly valve, carbon steel or stainless steel valve plate and valve stem. It is suitable for water supply and drainage and gas pipelines with temperature ≤ 80 ~ 120 ℃, such as food, medicine, chemical industry, petroleum, electric power, light textile, papermaking, etc.

D371XMain technical parameters of double clip worm gear soft seal butterfly valve pn6 ～ PN16

Nominal diameterDN（mm)	50～2000		50～1600
Nominal pressurePN（Mpa)	0.6	1.0	1.6
Sealing test(Mpa)	0.66	1.1	1.76
strength test(Mpa)	0.9	1.5	2.4
Applicable temperature	Nitrile rubber: - 40 ℃ ~ 90 ℃ fluororubber: - 20 ℃ ~ 200 ℃
Applicable media	Water, air, natural gas, oil and weak corrosive fluid
Leakage rate	In accordance with GB / T13927-92
Driving mode

1. The design is novel, reasonable, unique in structure, light in weight and quick in opening and closing.
2. Small operating torque, convenient operation, labor saving and dexterous.
3. It can be installed in any position and easy to maintain.
4. The sealing element can be replaced, the sealing performance is reliable, and the two-way sealing is zero leakage.
5. The sealing material has the characteristics of aging resistance, weak corrosion resistance and long service life.

D371XMaterials of main parts and components of double clip worm gear soft seal butterfly valve pn6 ～ PN16

Part name	Material Science
Part name	WCB、QT450-10、HT200、HT250
Disc	WCB、QT450-10、HT200、HT250
Valve shaft	2Cr13
seal ring	Oil resistant nitrile rubber
filler	Flexible graphite

D371XStandard for pn6 ～ PN16 of clamp type worm gear soft seal butterfly valve

Manufacturing standards	GB/T 122387-89
Flange standard	GB9113-2000、GB17241.6-1998
Structural length standard	GB12221-89
Inspection standard	GB/T 13927-92

D371XMain external connection dimensions of clamp type worm gear soft seal butterfly valve pn6 ～ PN16(mm)

DN	L	H	HO	A	B	0.6MPa		1.0MPa		1.6MPa
						DO	n-d	DO	n-d	DO	n-d
50	43	63	306	180	200	110	4-14	125	4-18	125	4-18
65	46	70	321	180	200	130	4-14	145	4-18	145	4-18
80	46	83	346	180	200	150	4-18	160	8-18	160	8-18
100	52	105	387	180	200	170	4-18	180	8-18	180	8-18
125	56	115	411	180	200	200	8-18	210	8-18	210	8-18
150	56	137	447	270	280	225	8-18	240	8-22	240	8-22
200	60	164	572	270	280	280	8-18	295	8-22	295	8-22
250	68	206	646	270	280	335	12-18	350	12-22	355	12-26
300	78	230	738	380	420	395	12-22	400	12-22	410	12-26
350	78	248	761	380	420	445	12-22	460	16-22	470	16-26
400	102	289	877	450	470	495	16-22	515	16-26	525	16-30
450	114	320	938	480	490	550	16-22	565	20-26	585	20-30
500	127	343	993	480	490	600	20-22	620	20-26	650	20-33
600	154	413	1131	480	490	705	20-26	725	20-30	770	20-36
700	165	478	1476	640	660	810	24-26	840	24-30	840	24-36
800	190	525	1533	640	660	920	24-30	950	24-33	950	24-39
900	203	585	1655	750	860	1020	24-30	1050	28-33	1050	38-39
1000	216	640	1765	850	900	1120	28-30	1160	28-36	1170	28-42
1200	254	755	1995	850	900	1340	32-33	1380	32-39	1390	32-48

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.