D41X(Y) Soft sealed flange butterfly valveDetailed product description：

Purpose and Features

Soft sealed butterfly valves are suitable for regulating flow and intercepting media on water supply and drainage, gas pipelines in food, medicine, chemical, petroleum, power, textile, papermaking, and other industries with temperatures ≤ 120 ℃ and nominal pressures ≤ 1.6MPa. Its main characteristics are:
1. Novel and reasonable design, unique structure, lightweight, and quick opening and closing.
2. Small operating torque, easy to operate, labor-saving and agile.
3. Can be installed in any position, easy to maintain.
4. The seals can be replaced, and the sealing performance is reliable, achieving bi-directional sealing with zero leakage.
5. The sealing material has the characteristics of aging resistance, corrosion resistance, and long service life.

Adopting standards

Design standard: GB/T2238-1989
Flange connection size: GB/T9113.1-2000; GB/T9115.1-2000; JB78
Structural length: GB/T12221-1989
Pressure test: GB/T13927-1992; JB/T9092-1999 

Main technical parameters

Nominal Diameter	DN（mm）	50~2000
Nominal pressure	PN（MPa）	zero point six	one	one point six
Test pressure	strength test	zero point nine	one point five	two point four
	Sealing Test	zero point six six	one point one	one point seven six
	gas tightness test	zero point six	zero point six	zero point six
Applicable Medium	Air, water, sewage, steam, gas, oil, etc.
Drive Type	Manual, worm gear transmission, pneumatic transmission, electric transmission.

The material of the main components

Part Name	Material
valve body	Various types of rubber, polytetrafluoroethylene
butterfly valve disc	Grey cast iron, ductile iron, cast steel, stainless steel, and special materials
Seal ring	Ductile cast steel, cast steel, alloy steel, stainless steel
valve stem	2Cr13、 stainless steel
filler	O-ring, flexible graphite O

Selection and applicable temperature of butterfly valve sealing materials

Material variety	neoprene	Nitrile rubber	Ethylene Propylene Rubber	Polytetrafluoroethylene	silicone rubber	fluororubber
code name	X or J	XA or JA	XB or JB	XC, JC, or F	XD or JD	XE or JE
Maximum temperature resistance	82℃	93℃	150℃	232℃	250℃	204℃
Minimum temperature resistance	-40℃	-40℃	-40℃	-268℃	-70℃	-23℃
Applicable working temperature	≤65℃	≤80℃	≤120℃	≤200℃	≤200℃	≤180℃