D71X Manual double clip type soft seal butterfly valve has compact structure, easy 90 ° rotary switch, reliable sealing and long service life. It is widely used in water supply and drainage of water plants, power plants, steel mills, papermaking, chemical industry, catering and other systems as regulation and cut-off use.

1. D71X manual clamp type soft seal butterfly valve adopts double eccentric structure, which has the sealing function of closing more tightly, and the sealing performance is reliable. 2. Stainless steel and NBR oil resistant rubber are used as sealing materials, which have long service life.  
3. The rubber seal ring can be located on the valve body or butterfly plate. It can be used in different media for users to choose.  
4. The butterfly plate adopts frame structure with high strength, large flow area and small flow resistance.  
5. It can be used in different media as long as the sealing material of sealing valve seat is replaced.  
6. The valve has the function of two-way sealing. It is not controlled by the flow direction of medium or affected by the space position. It can be installed in any direction.  
7. The valve has unique structure, flexible operation, labor saving and convenience.

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

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

Nominal diameterDN（mm)	50～2000		50～1600
Nominal pharmacologyPN（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
Applicable media	Water, air, natural gas, oil and weak corrosive fluid
Leakage rate	In accordance with GB / T13927-92
Driving mode	Worm gear drive, electric, pneumatic and hydraulic

DN	L	H	HO	A	B	0.6MPa		1.0MPa		1.6MPa
						DO	n-d	DO	n-d	DO	n-d
50	43	63	235	270	110	110	4-14	125	4-18	125	4-18
65	46	70	250	270	110	130	4-14	145	4-18	145	4-18
80	46	83	275	270	110	150	4-18	160	8-18	160	8-18
100	52	105	316	270	110	170	4-18	180	8-18	180	8-18
125	56	115	340	310	110	200	8-18	210	8-18	210	8-18
150	56	137	376	310	110	225	8-18	240	8-22	240	8-22
200	60	164	430	353	150	280	8-18	295	8-22	295	8-22
250	68	206	499	353	150	335	12-18	350	12-22	355	12-26
300	78	230	570	380	150	395	12-22	400	12-22	410	12-26