In reduced bore ball valves, flow through the valve is one pipe size smaller than the valve's pipe size resulting in flow area becoming lesser than pipe. But the flow discharge remains constant as it is a multiplier factor of flow discharge (Q) is equal to area of flow (A) into velocity (V). A1V1 = A2V2; the velocity increases with reduced area of flow and decreases with increased area of flow.
Valve Design | BS EN ISO 17292 (BS 5351) / API 6D / ASME B 16.34 / BE EN ISO 12516 |
Pressure Testing | API 598 / API 6D / BS EN 12266 I |
Fire Testing | API 607 / BS EN ISO 1266 II |
Face To Face | As Per ANSI B 16.10 |
Flange Drilling | ANSI B 16.5, Raised Face, Class 150 / 300 / 600 |
Screwed End | ANSI B 1.20.1 (BSP/NPT) |
Socket Weld End | ANSI B 16.11 |
Butt Weld End | ANSI B 16.25 |
Quality Assurance | ISO 9001 |
Body / End Connector Piece: |
Cast Carbon Steel to ASTM A 216 GR. WCB |
Stainless Steel to ASTM A 351 GR. CF 8 / 8M / 3 / 3M |
Hast Alloy B / C |
ASTM A 351 GR. CN 7M (Alloy 20) |
Ball: |
Stainless Steel to ASTM A 351 GR. CF 8 / 8M / 3 / 3M |
Hast Alloy B / C |
ASTM A 351 GR. CN 7M (Alloy 20) |
Stem: |
AISI 304 (S.S. 304) |
AISI 316 (S.S. 316) |
AISI 304L (S.S. 304L) |
AISI 316L (S.S. 316L) |
Hast Alloy B / C |
Alloy 20 |
Ball Seat / Gland Seal / Stem Seal: |
P.T.F.E. Virgin |
P.T.F.E. Glass Filled |
P.T.F.E. Carbon Filled |
Grafoil / Graphite Ring |