DN800-PN16 Cast Iron Metal Seated Non-Rising Stem Gate Valve
Description
TECHNICAL DATASHEET
DN800 PN16 Ductile Iron Non-Rising Stem Gate Valve (DIN3352, Bronze Seated)
Project / P.O. No.: ____________________
Tag No.: ____________________
Qty: ______ Units
1. General Specifications
| Item | Specification |
|---|---|
| Valve Type | Non-Rising Stem Gate Valve (NRS), Bronze Seated |
| Nominal Size | DN800 (32″) |
| Pressure Rating | PN16 |
| End Connection | Flanged Ends |
| Flange Standard | DIN EN 1092-2 (PN16, Ductile Iron Flanges, Flat Face / Raised Face) |
| Face-to-Face Dimension | DIN3352 F4 / DIN EN 558 Series 1 (470 mm) |
| Design & Manufacture Standard | DIN3352 (Part 4 / Type F4) |
| Test & Inspection Standard | DIN EN 12266-1 |
2. Design Parameters
| Item | Unit/Standard | Parameter |
|---|---|---|
| Max. Allowable Pressure | bar | 16 bar @ ambient temperature |
| Service Media | – | Water, non-corrosive liquids, gases |
| Operating Temperature | °C | -10°C to 120°C (depending on trim materials) |
| Operation | – | Gearbox (Mandatory for DN800) |
3. Material of Construction (M.O.C.)
| Part Name | Material Required | Standard / Grade (Ref.) |
|---|---|---|
| 1. Body | Ductile Iron (DI) | DIN EN 1563 (EN-GJS-400-15 or GGG40/GGG50) |
| 2. Bonnet | Ductile Iron (DI) | DIN EN 1563 (GGG40/GGG50) |
| 3. Wedge (Gate) | Ductile Iron (DI) with Bronze seat face | DIN EN 1563, Bronze overlay/inlay on seat faces |
| 4. Seat Face | Bronze | Overlay or inlay, e.g., DIN EN 1982 (CuSn5Zn5Pb5 – Red brass / Tin bronze) |
| 5. Stem | Stainless Steel | 1.4021 (X20Cr13) / 1.4301 (Rotates only, no axial movement) |
| 6. Stem Nut | Bronze / Aluminum Bronze | Connected to wedge, converts rotation to linear motion |
| 7. Packing | Flexible Graphite / PTFE | – |
| 8. Gasket | Non-asbestos fiber / Graphite | – |
| 9. Bolts/Nuts | Carbon Steel | Zinc plated or black finished |
| 10. Gearbox | Ductile Iron | Gearbox housing: GGG40/GGG50 |
4. Main Dimensions (Reference)
Note: Dimensions for reference only. Final dimensions to be verified per manufacturer’s drawing. (Unit: mm)
| Description | Dimension | Remarks |
|---|---|---|
| Face-to-Face (L) | 470 mm | Per DIN3352 F4 / EN 558 Series 1 |
| Flange Diameter (D) | 1025 mm | DIN EN 1092-2 PN16 (DN800) |
| Bolt Circle Diameter (C) | 950 mm | DIN EN 1092-2 PN16 |
| Bolt Holes (n-ød) | 24-ø40 mm | 24 holes, 40mm bolt hole diameter |
| Flange Thickness (b) | 43 mm | DIN EN 1092-2 PN16 |
| Flange Facing Height (f) | 5 mm | Raised face height |
| Overall Height (H) | Approx. 800 mm | From bottom of body to top of gearbox (Reference, significantly lower than OS&Y) |
| Approx. Weight | Approx. 1150 kg | Varies by manufacturer |
5. Inspection & Testing (DIN EN 12266-1)
| Test Description | Medium | Pressure (bar) | Requirement |
|---|---|---|---|
| Shell (Hydrostatic) | Water | 24 (1.5 x PN) | No visible leakage |
| Seat (High Pressure) | Water | 17.6 (1.1 x PN) | Leakage rate ≤ specified rating (Bronze to Bronze seat) |
| Low Pressure Pneumatic | Air | 0.6 | Optional, leakage rate ≤ specified rating |
6. Options & Accessories
| Item | Options |
|---|---|
| Stem Upgrade | Stainless Steel 1.4408 (AISI 316) / 17-4PH |
| Wedge Material | Full Stainless Steel / Nylon Coated Ductile Iron (Bronze seat face maintained) |
| Bronze Grade | CuSn7Zn4Pb7 / CuSn5Zn5Pb5 (selectable based on media requirements) |
| Operation | Gearbox (Standard) / Electric Actuator / Hydraulic Actuator / Extension Stem (for buried service) |
| Flange Facing | Flat Face (FF) or Raised Face (RF) to match counter flange |
| Coating | Epoxy Coated (Blue RAL 5005 or Black), min. thickness 250μm, per DIN 30677 |
| By-Pass | By-Pass Assembly (optional for pressure equalization) |
| Stem Extension | Available for deep burial or floor-standing installations |
Remarks:
-
Bronze Seat Advantage: Bronze-to-Bronze seat trim design offers excellent corrosion resistance, wear resistance, and anti-galling properties, making it ideal for clean water, seawater, and various industrial media.
-
Design Standard: This valve is designed in accordance with DIN3352 F4, suitable for water supply systems and general industrial applications.
-
Non-Rising Stem Feature: NRS design means the stem does not rise with the wedge; it only rotates. The overall height remains constant regardless of valve position, making it ideal for limited installation spaces or direct burial applications.
-
Pressure Rating: PN16 per DIN EN 1092-2 standard. Maximum allowable working pressure is 16 bar at ambient temperature.
-
Large Size Consideration: DN800 valve is heavy and requires significant operating torque. Gearbox operation is mandatory. Please confirm installation space and lifting arrangement.
-
Seat Finish: Bronze seat faces are achieved by overlaying (welding) or inserting bronze rings on both body and wedge, ensuring long-term reliable sealing performance.
-
Applicable Standards: This datasheet is based on DIN3352 and relevant DIN EN standards. Please confirm specific standard revisions and project special requirements before procurement.
Prepared by: __________________
Date: __________________
Approved by: __________________
Date: __________________
