D671X Pneumatic Soft Seal Butterfly Valve

• Customized: Customized
• Certification: ISO, API, CE
• Power: Manual
• Pressure: Medium Pressure
• Brand: Xuan Cheng
• Work Temperature: Normal Temperature
• Model NO.: D671X
• Material: Plastic
• Medium: Water, Steam, Gas, etc
• Structure: Through
• Connection Mode: Splint
• Seal: Hard Seal
• Transport Package: Wooden Box
• Specification: DN50-DN800
• Trademark: xc
• Origin: China
• HS Code: 8412310090
• Production Capacity: 10000

Product Description

Overview of Pneumatic Soft Seal Butterfly Valve
D671X pneumatic soft seal butterfly valve is a kind of corrosion resistance and good sealing in the type of butterfly valve, generally divided into flange or clamp connection, can be used for containing corrosive media and leakage requirements of higher room temperature and pressure occasions. Pneumatic soft seal butterfly valve adopts sealing structure, sealing materials are rubber, PTFE and so on, the leakage can reach zero leakage. Due to the limitations of structural characteristics, pneumatic soft seal butterfly valve is not suitable for high temperature, high pressure and wear resistance and other industries, only suitable for room temperature environment and low pressure, medium pressure and other places to do switch off and adjust the flow.



Pneumatic soft seal butterfly valve parameter description

Nominal diameter	DN50 to DN1200(mm)
Pressure level	PN1.0, 1.6, 2.5MPa
Connection mode	Clamp or flange connection
Spool form	Saucer plate
Drive mode	Air source drive, compressed air 5 ~ 7bar(with handwheel available)
Range of action	0 to 90°
Seal material	All kinds of rubber, tef-lon
Workplace	Various corrosive media, etc. (normal temperature and pressure, low temperature and low pressure occasions)
Accessory options	Positioner, solenoid valve, air filter pressure reducer, position keeping valve, travel switch, valve position transfer, hand wheel mechanism, etc
Control mode	Switch two control, air open, air close, spring return, intelligent regulator (4 ~ 20mA analog signal)

Pneumatic soft seal butterfly valve advantages
1. Simple structure, small flow resistance coefficient, flow characteristics tend to be straight line, will not stay debris.
2. The connection between the butterfly plate and the valve stem adopts the pin-free structure, which overcomes the possible internal leakage point.
3, divided into pneumatic clamp type soft seal butterfly valve and pneumatic flange soft seal butterfly valve, to meet different pipelines.
4, the sealing parts can be replaced, the sealing performance is reliable to achieve bi-directional sealing zero leakage.
5, sealing material aging resistance, corrosion resistance, long service life






Pneumatic soft sealing butterfly valve sealing material

Material variety	Neoprene rubber	Nitrile butadiene rubber	Ethylene-propylene rubber	Tef-lon	Silicone rubber	Fluorine rubber
Code name	× or 0rJ	XA or orJA	XB or orJB	xC, JC, or 0rF	XD or orJD	× E or orJE
Withstand maximum temperature	82 ºC	93 ºC	150 ºC	232 ºC	250 ºC	204 ºC
Minimum temperature resistance	To 40 ºC	To 40 ºC	To 40 ºC	- 268 ºC	- 70 ºC	- 23 ºC
Applicable operating temperature	65 ºC or less	80 ºC or less	120 ºC or less	200 ºC or less	200 ºC or less	180 ºC or less

The difference between pneumatic soft seal butterfly valves and pneumatic hard seal butterfly valves
1, soft seal butterfly valve is medium type, hard seal is single eccentric, double eccentric, three eccentric butterfly valve structure.
2, soft seal for room temperature environment. Hard seal can be used for low temperature, room temperature, high temperature and other environments.
3, soft seal used in low pressure - normal pressure, hard seal can also be used in middle and high pressure.
4, soft seal and three eccentric hard seal butterfly valve sealing performance is better, three eccentric butterfly valve in high pressure and high temperature environment can maintain a good seal.
5, the advantage of soft seal butterfly valve is good sealing performance, the disadvantage is easy to aging, wear, short service life.
6, hard seal butterfly valve long service life, but the tightness is relatively poor than soft seal.



ic control of the butterfly valve technical parameters

Nominal diameter	DN50 to DN1200(mm)
Pressure level	PN1.0, 1.6, 2.5, 6.4MPa
Connection mode	Flange, splint connection
Sealed form	Soft seal or metal hard seal
Drive mode	Air source drive, compressed air 4 ~ 7bar(with handwheel available)
Range of action	0 to 90°
Body material	Carbon steel Stainless Steel 304 Stainless steel 316
Workplace	Water, steam, oil, acid corrosion, etc. (high temperature situations)
Temperature range	Soft seal: -29ºC ~ 180ºC Hard seal: -40ºC ~ 550ºC
Control mode	Assembly valve positioner, intelligent regulator (4 ~ 20mA analog signal)

Standard specification for pneumatic control butterfly valves
Design standard: GB/T2238-1989
Construction length: GB/T12221-1989
Pressure test: GB/T13927-2000; JB/T9092-1999  
Flange connection size: GB/T9113.1-2000; GB/T9115.1-2000;
Adjustable range R: 50:1
Number of uses: 1 million
Return error: with locator: less than 2% of full travel
Basic error: With positioner: less than ±2% of full stroke
Leakage l/h: Meets ANSI B16.104 Level IV standards

D671X Pneumatic control butterfly valve