F46HL roof relief valve by pulling the lever system to the valve opening and closing action. As a result of bearing positioning the valve has a flexible, reliable sealing, and long service life. The valve for blast furnace off-wind furnace gas emissions into the sky, to ensure the safety of the blast furnace system. 

 The DN D, D1, D2, the BF ND A B C F G H H1 mass (kg) 
 200 445 400 300 20-4 12-22 
 250 505 460 350 21-4 16-22 
 300 565 515 400 21-4 12-25/26 1220 1450 470 730 620 580 110 610 
 350 615 565 450 24-4 20-26 
 400 670 620 500 26-4 20-26 


 Model Specification precipitator relief valve 
 FS45X-2.5 
 FS45W-2.5 roof relief valve 
 FS65W-0. 
 FS65H-0.2 butterfly relief valve 
 DFS43W-2.5 
 DFS943W-2.5 (4) 
 Nominal pressure Mpa 0.25 0.02 0.25 (0.4) 
 Suitable temperature ° C ≤ 300 
 Opening angle of ≈ 45 ≈ 45 ≈ 60 
 Suitable medium air gas dusty gas 
 Flange connection size perform GB2555-81PN6 standard 


 FS45X-2.5 
 FS45W-2.5 FS65W-0. 2 
 FS65H-0.2 DFS43W-2.5 
 DFS943W-2.5 (4) 
 Part Name Material Parts name Material Part Name Material 
 Seat the HT-200 or A3 body A3 A3, welding body welding or HT-200 
 Bonnet HT-200 or HT-200 A3 seat or A3 valve plate A3 
 Leverage A3 bonnet HT-200 or A3 stem 45 
 Limiter A3 lever A3 connecting rod 45 
 Heavy beating HT-150 heavy hammer HT150 piston HT-200 
 Axis 45 rows hairdryer A3 
 Bearing the HT150 rose circle the HT-200