Cast Steel Globe Valve
1. Product Overview
Metals Valve’s cast steel globe valves are designed & manufactured according to relative BS, ISO, API and ASMR standards. Globe valves are closing down valves in which the closure member (disc) is moved squarely on and off the seat. It is a linear-motion valve characterized by a body with longer face-to-face that accommodates follow passage sufficiently long enough to ensure smooth flow through the valve without any sharp turns. Cast steel globe valves can be used in both on-off and throttling applications. Because of the short travel of the disc between the open and closed positions and the robust wear-resistant seating design, globe valves are ideally suitable for frequent stroking services. The cast steel globe valves, can be made from various materials covering carbon steel, high-temperature alloy steel, stainless steel, low temperature steel, and special alloys, etc.
2. Design Standards and Design Features
Design/Inspection standards: API 6D, API 600, ASME B16.34, BS EN13709, BS 1873, ASME B16.10, ASME B16.5.
(1) Handwheel operated with OS&Y and rising stem.
(2) Gland eyebolts are applied to facilitate packing maintenance and easy dismantling.
(3) Body/Bonnet joint design: male and female matching joint for 150LB~600LB; metallic ring gasket seal for 900LB and above.
(4) T-shaped anti blow-out stem design.
(5) Plug-shaped disc and seating face design allows particular flow characteristic.
(6) Seating surface shall be hardened by stellite 6 overlay.
3. G.A Drawings & Typical Material Selection
G.A Drawings
Typical Material Selection
No. | Part Name | Carbon Steel | Alloy Steel | Stainless Steel |
---|---|---|---|---|
1 | Body | ASTM A216 WCB | ASTM A217-WC9 | ASTM A351 CF8M |
2 | Disc | ASTM A182 F6a | ASTM A182-F22/STL.OVERLAY | ASTM A182 F316 |
3 | Disc Sleeve | ASTM A182 F6a | ASTM A182-F22/STL.OVERLAY | ASTM A182 F316 |
4 | Stem | ASTM A182 F6a | ASTM A182 F6a | ASTM A182 F316 |
5 | Bellow Seal | ASTM A276 304 | ASTM A276 304 | ASTM A276 316 |
6 | Bonnet Gasket | Soft Iron | Soft Steel | ASTM A276 316 |
7 | Bonnet | ASTM A216 WCB | ASTM A217-WC9 | ASTM A351 CF8M |
8 | Bolt | ASTM A193 B7 | ASTM A193 B16 | ASTM A193 B8 |
9 | Nut | ASTM A194 2H | ASTM A194 4 | ASTM A194 8 |
10 | Packing | SS316+Graphile | SS316+Graphile | SS316+Graphile |
11 | Gland | ASTM A182 F6a | ASTM A276 316 | ASTM A276 420 |
12 | Gland Flange | ASTM A216 WCB | ASTM A216 WCB | ASTM A351 CF8 |
13 | Stem Nut | ASTM A439 D2 | ASTM A439 D2 | ASTM A439 D2 |
14 | Handwheel | Ductile Iron | Ductile Iron | Ductile Iron |