

Blow Down Valves Manufacturer
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Taher Brothers is a leading Manufacturer in Kolkata, West Bengal, Odisha, Bihar, Jharkhand & all over India of the different types of Blow down Valves such as the Steam Boiler Blowdown Valves and others for various industrial applications. The boiler applications boil the water and therefore the impurities in water become sludge and get deposited at the bottom of the tanks and boilers. The blowdown systems are designed with more than one valve and are controlled by the user or operator.
The Angle Blowdown Valve is one of the most used due to the high temperature applications. The sludge is removed by the opening of the valve at certain point. Some of the systems use automated time intervals while some other use the amount of sludge that builds up during the operations. The Steam Blowdown Valve is available from us with other types and grades as well. The purging of the sludge is made easy with the blow down valves. Depending on the water quality, the use of different types of valves such as the Blowdown Valves is decided. You can contact us for more detailed information on the different types and prices of these valves.

Blow Down Valve Specification
Cast Iron Steam Boiler Blowdown Valves Flanged end connection as per ANSI B16.5 and BS 10 standard
Size | DN8 through DN50 |
Body Styles | End connections Welded or Threaded Ends |
Pressure Class | up to 6000PSIG or PN680 |
MATERIAL | CAST STEEL |
END CONNECTIONS | FLANGED |
END FLANGES | ANSI B – 16.5, B.S.10 TABLE – J |
FACE TO FACE | ANSI B – 16.10 |
WORKING PRESSURE | CLASS 300 – 52.02 Kg/sq.cm. |
TESTING PRESSURE | CLASS 300 – 104.04 Kg/sq.cm. HYDRAULIC |
MANUFACTURING STANDARDS | API 602 |
TESTING STANDARDS | BS 6755 PART – I |
SIZE RANGE | 1, 1 1/2 INCH |
Material Standards of Blow-down Valves
IBR approved GG25 Cast Iron Angle Blowdown Valve exporter in India
NAME OF PART | MATERIAL | STANDARD |
Body & Bonnet Rack & Pinion Stuffing Box Gland Discs Body Seat Ring Stud & Nut Gasket Spring Packing Key |
Cast Steel Stainless Steel Cast Steel Cast Steel Stainless Steel Stainless Steel Carbon Steel Steam Jointing Spring Steel Graphoi Mild Steel |
ASTM A 216 Gr. WCB ASTM A 276 TYPE 410 ASTM A 216 Gr. WCB ASTM A 216 Gr. WCB ASTM A 276 TYPE 410 ASTM A 276 TYPE 410 BS: 916 To Suit Service Conditions. EN-44 or Equivalent |
Equivalent Grades of Blow Down Valve
Blowdown Valve are manufactured as per API 602 specification
Test Pressure (Hydrostatic) | Working Pressure (Steam) | Maximum Service Temperature |
700 Psig | 350 Psig | 400°C |
Size Chart of Blow Down Valve
Sizes | Dimensions (mm) | |||
Inches. | mm | A | B | C |
1 | 25 | 178 | 120.6 | 19.05 |
1-1/2 | 40 | 205 | 139.7 | 22.20 |
2 | 50 | 255 | 165.1 | 25.40 |
2-1/2 | 65 | 275 | 184.1 | 28.00 |
Blown Down Valve Dimension Chart
Size | A | B | H | D | A | B | H | D |
1“ DN025 | 190 | 130 | 360 | Ø160 | 196 | 133 | 360 | Ø160 |
1½“ DN040 | 286 | 198 | 440 | Ø160 | 294 | 202 | 440 | Ø160 |
2“ DN050 | 350 | 245 | 530 | Ø225 | 356 | 248 | 530 | Ø160 |
3“ DN080 | 530 | 370 | 745 | Ø280 | 538 | 374 | 745 | Ø225 |
4“ DN100 | 630 | 445 | 845 | Ø360 | 646 | 453 | 840 | Ø280 |
6“ DN150 | 902 | 636 | 1110 | Ø360 | 924 | 647 | 1110 | Ø315 |
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