TURBINE VENTILATION BUTTERFLY VALVE

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Packging & Delivery

The applicable temperature of the ventilation butterfly valve depends on the material selection of the valve body

Product characteristics

1. Ventilation butterfly valve is novel and reasonable in design, unique in structure, light in weight and quick in opening and closing.

2. The butterfly valve has the advantages of small operating moment, convenient operation and smart labor-saving.

3. Using suitable materials to meet the different temperatures of low, medium and high media and corrosive media.

4. No connecting rods, bolts, etc., reliable operation, long service life, not affected by the flow direction of media.

Standard Specification for Ventilation Butterfly Valves:

Design and Manufacture Standards: GB/T 12238-1989; JB/T8692-1998

Structural Length Standard: GB/T 12221-2005

Connection Flange Standard: GB/T 9115.1

Pressure and temperature grade: GB/T 12224-2005

Test Inspection Standard: GB/T 13927-2008

Main technical parameters

Nominal diameterDN(mm)		50～2000
Nominal pressurePN(MPa)		0.05	0.25	0.6
Test pressure Ps(MPa)	strength test	0.075	0.375	0.9
	Sealing test	≤1.5％Leakage quantity
Applicable medium		Gas, dusty gas, flue gas, etc.
Driving form		Manual, Worm and Worm Wheel, Pneumatic and Electrical Drives

Material of Major Parts and Components

Part name	Material Science
valve body	Cast steel, stainless steel, chromium-nickel-molybdenum-titanium steel, chromium-molybdenum-titanium steel and other special materials
Disc	Cast steel, stainless steel, chromium-nickel-molybdenum-titanium steel, chromium-molybdenum-titanium steel and other special materials
Seal ring	Cast steel, stainless steel, chromium-nickel-molybdenum-titanium steel, chromium-molybdenum-titanium steel and other special materials
Stem	Carbon steel, 2Crl3, stainless steel, chromium-nickel-molybdenum-titanium steel
filler	Flexible graphite

Applicable temperature

Material variety	carbon steel	Low temperature carbon steel	Alloy steel		austenitic stainless steel	Chromium molybdenum steel
Code name	WCB	LCB	WC6或WC9	C5或C12	铬 Cr-18型、304、31 6	12CrMoV
Resistance to maximum temperature	425℃	345℃	595℃	650℃	600℃	560℃
Minimum Temperature Resistance	-29℃	-46℃	-29℃	-29℃	-196℃	-40℃
Applicable working temperature	≤ 25℃	≤345℃	≤595℃	≤ 650℃	≤600℃	≤560℃