Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

D671F Pneumatic Fluorine-Lined On-Off Butterfly Valve
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Phone：+86（577）6730 7899
Mobile：+86 195 1816 9569
Fax：+86（577）6738 7099
Email：Lucas@kaiweixi.com
Address：No. 1, Linxia Road, Oubei Street, Yongjia County, Wenzhou City, Zhejiang Province,china
Website：https://www.kaiweixi.com

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D671F Pneumatic Fluorine-Lined On-Off Butterfly Valve

Model：D671F-10C/D671F-16C/D671F-25C/D671F-10P/D671F-16P/D671F-25P
Specification：DN50~400
Temperature：-40~180℃
Medium：Corrosive media requiring rapid shut-off

Pressure：PN1.0～2.5MPa
Connection method：Wafer
Driving method：Pneumatic
Material：WCB+PTFE, CF8+PTFE

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D671F Pneumatic Fluorine-Lined On-Off Butterfly ValveOverview

The D671F pneumatic fluorine-lined shut-off butterfly valve is an industrial automation execution unit specifically engineered for harsh and highly corrosive working conditions. This valve integrates a high-performance pneumatic piston actuator with a fully lined centerline butterfly valve body. The core technology involves an overall molded lining of F46 (FEP) or PTFE on the internal cavity and disc surfaces, completely isolating the medium from the metal substrate. By receiving air signals from control systems, the actuator drives the disc to rotate within a 0-90 degree range, achieving rapid shut-off or opening of aggressive media. With its superior chemical resistance, bubble-tight sealing, and compact design, the D671F series is widely utilized in petroleum, chemical, pharmaceutical, and electronic industries where corrosion protection is paramount.

Product Image of D671F Pneumatic Fluorine-Lined On-Off Butterfly Valve

D671F Pneumatic Fluorine-Lined On-Off Butterfly ValveCharacteristic

1.Superior strong corrosion resistance:All media-contacting surfaces are lined with a uniform fluoroplastic layer, providing resistance against hydrochloric acid, sulfuric acid, aqua regia, and strong alkalis, ensuring long-term structural integrity.
2.Bi-directional bubble-tight sealing:Utilizing an interference-fit sealing principle, the disc edge fits tightly against the lined seat during closure. It offers excellent elastic compensation for zero-leakage in both directions, meeting ANSI Class VI standards.
3.Rapid response time:Equipped with high-thrust pneumatic piston actuators, utilizing compressed air to generate instantaneous torque for full-stroke action within 1-3 seconds. Ideal for emergency shutdown (ESD) applications.
4.Low flow resistance and high capacity:The disc features a streamlined, ultra-thin design. When fully open, the flow path is nearly straight with an extremely low resistance coefficient, reducing pressure drop and energy consumption.
5.Compact and lightweight design:Flanged or wafer designs significantly shorten the face-to-face length and weight. This saves space and reduces the mechanical load on the piping and its supports.
6.Vacuum and temperature stability:Advanced molding technology ensures the lining is firmly anchored to the metal, effectively preventing lining peeling or collapse under vacuum or pressure fluctuations.
7.Intrinsically safe attributes:Driven by clean compressed air, it eliminates spark risks, providing natural explosion-proof safety for hazardous oil, gas, and chemical zones.
8.Modular maintenance and durability:The refined design features minimal wearing parts. Actuator-to-body interfaces are standardized, allowing for online inspection of seals without removing the valve from the line.

D671F Pneumatic Fluorine-Lined On-Off Butterfly Valvestructure principle

Structural Drawing of D671F Pneumatic Fluorine-Lined On-Off Butterfly Valve

List of Component Names and Materials

Part Name	Material
Upper & Lower Body	WCB+PTFE, CF8+PTFE
Valve Seat	Cast steel
Disc with Stem	Cast steel, Stainless steel, F46/F4 lined
Packing	F4 (PTFE)
Gasket/Lining	Silicone rubber
Worm Gear Handle	Ductile iron

D671F Pneumatic Fluorine-Lined On-Off Butterfly Valvetechnology parameter

Performance Specification Sheet

Performance Specification Sheet
Nominal Pressure	1.0	1.6	2.5	MPa
Strength test pressure	1.5	2.4	3.8
Sealing test pressure	1.1	1.76	2.8
Applicable Temperature	-40~180			℃

D671F Pneumatic Fluorine-Lined On-Off Butterfly Valvestandard size

Standard requirements for external dimensions

1. The structural length of the valve shall comply with the standard of GB/T12221

2. Connecting flanges according to GB/T17241.6 standard

Outline Drawing of D671F Pneumatic Fluorine-Lined On-Off Butterfly Valve

Outline dimension table

DN (mm)	DN (inch)	Face to Face (L)	H	H1	A	A1	D1 (0.6MPa)	n-Φd (0.6MPa)	D1 (1.0MPa)	n-Φd (1.0MPa)	D1 (1.6MPa)	n-Φd (1.6MPa)
50	2	43	63	438	125	80	110	4-14	125	4-18	125	4-18
65	21/2	46	70	453	125	80	130	4-14	145	4-18	145	4-18
80	3	46	83	478	125	80	150	4-18	160	8-18	160	8-18
100	4	52	105	519	125	80	170	4-18	180	8-18	180	8-18
125	5	56	115	713	325	190	200	8-18	210	8-18	210	8-18
150	6	56	137	749	325	190	225	8-18	240	8-22	240	8-22
200	8	60	164	843	325	190	280	8-18	295	8-22	295	12-22
250	10	68	206	947	363	230	335	12-18	350	12-22	355	12-26
300	12	78	230	1013	363	230	395	12-22	400	12-22	410	12-26
350	14	78	248	1046	363	230	445	12-22	460	16-22	470	16-26
400	16	102	289	1135	363	230	495	16-22	515	16-26	525	16-30
450	18	114	320	1328	465	300	550	16-22	565	20-26	585	20-30
500	20	127	343	1226	546	325	600	20-22	620	20-26	650	20-33
600	24	154	413	1394	546	325	705	20-26	725	20-30	770	20-36
700	28	165	478	1534	546	325	810	24-26	840	24-30	840	24-36
800	32	190	525	1659	546	325	920	24-30	950	24-33	950	24-39
900	36	203	585	1748	617	450	1020	24-30	1050	28-33	1050	28-39
1000	40	216	640	1805	632	455	1120	28-30	1160	28-36	1170	28-42
1200	48	254	755	2035	632	455	1340	32-33	1380	32-39	1390	32-48
1400	56	279	910	2310	790	550	1560	36-36	1590	36-42	1590	36-48
1600	64	318	1030	2845	868	580	1760	40-36	1820	40-48	1820	40-56
1800	72	356	1140	3060	868	580	1970	44-39	2020	44-48	2020	44-56
2000	80	406	1250	3350	965	600	2180	48-42	2230	48-48	2230	48-62

Articles related to technology research and development

Dynamic balance electric control valve Patent

The utility model provides a dynamically balanced electric regulating valve, which includes a valve body, a valve cover, a valve rod, a valve core installed inside the valve body and connected to the valve rod, and an actuator installed on the valve cover and connected to the top end of the valve rod. The valve body is internally provided with a water inlet chamber, a valve cavity, and a water outlet chamber in order towards the direction of medium flow. The valve core is in the shape of a bucket with its opening facing downwards. The valve core is located inside the valve cavity and is used for connecting or cutting off between the water inlet chamber and the valve cavity. The top of the valve core is provided with a through port for medium circulation. Above the through port, there is a filter cover detachably connected to the valve core. The valve rod is provided with a step, and the outside of the step is covered with an elastic sleeve that fits it. The top of the filter cover is provided with a fixing hole that fits the elastic sleeve. This utility model can filter the medium, is simple to install, time-saving, labor-saving, and can reduce the medium pressure inside the valve body, extending the service life of the valve core.
1. A dynamic balance electric regulating valve, comprising a valve body, a valve cover, a valve rod, a valve core installed inside the valve body and connected to the valve rod, and an actuator installed on the valve cover and connected to the top end of the valve rod. Its characteristic lies in that the valve body is sequentially provided with an inlet chamber, a valve cavity, and an outlet chamber in the direction of medium flow. The valve core is in the shape of a bucket with an opening facing downwards. The valve core is located inside the valve cavity and is used for connecting or cutting off between the inlet chamber and the valve cavity. The top of the valve core is provided with a port for medium circulation. Above the port, there is a filter cover detachably connected to the valve core. The valve rod is provided with a step, and the outside of the step is covered with an elastic sleeve that fits it. The top of the filter cover is provided with a fixing hole that fits the elastic sleeve.
2. A dynamic balance electric regulating valve according to claim 1, characterized in that the bottom of the valve body is provided with a downward-opening groove, which is connected to the valve cavity through a through hole. A bottom cover connected to the valve body is arranged below the groove, and a pressure relief mechanism is arranged inside the groove. The pressure relief mechanism comprises a force-receiving member, a pressure plate connected to the force-receiving member, and a first spring arranged below the pressure plate and abutting against the bottom cover. The force-receiving member comprises a flow diversion block protruding from the through hole and a connecting rod connected to the flow diversion block, and the connecting rod passes through the pressure plate and is locked and fixed by a nut.
3. A dynamic balance electric regulating valve according to claim 2, characterized in that the top end of the pressure plate is pressed against the top wall of the groove, the bottom of the pressure plate is provided with a boss, and the top end of the first spring is sleeved on the boss.
4. A dynamic balance electric control valve according to claim 1, characterized in that the valve rod is arranged through the valve cover, a sealing cover threadedly connected to the valve cover is sleeved on the valve rod, a convex ring abutting against the valve cover is arranged on the outer circumferential wall of the sealing cover, a nut cover threadedly connected to the sealing cover is arranged at the connection between the sealing cover and the valve rod, an installation groove is arranged at the connection between the nut cover and the valve rod, a plurality of O-rings adapted to the valve rod are stacked in the installation groove, and a packing gland threadedly connected to the installation groove is arranged above the O-rings.
5. A dynamic balance electric control valve according to claim 4, characterized in that a second spring is arranged between the packing gland and the O-ring.
6. A dynamic balance electric control valve according to claim 5, characterized in that a sealing ring adapted to the valve rod is arranged inside the nut cover below the installation groove.
7. A dynamic balance electric control valve according to claim 6, characterized in that the bottom of the sealing cover is provided with a thrust ring that is threadedly connected to the sealing cover and abuts against the bottom end of the valve cover.
8. A dynamic balance electric regulating valve according to claim 1, characterized in that the top surface of the elastic sleeve is higher than the top surface of the filter cover.
9. A dynamic balance electric control valve according to claim 8, characterized in that the filter cover is connected to the valve core through threads.

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Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

D671F Pneumatic Fluorine-Lined On-Off Butterfly Valve

More Pneumatic Control Valve>>

More control valve>>

More valve>>

D671F Pneumatic Fluorine-Lined On-Off Butterfly Valve